diff --git a/frontend/components/dashboard/CitySidebar.tsx b/frontend/components/dashboard/CitySidebar.tsx
index 9070215f..2b942bfa 100644
--- a/frontend/components/dashboard/CitySidebar.tsx
+++ b/frontend/components/dashboard/CitySidebar.tsx
@@ -21,6 +21,10 @@ function toRiskGroup(level?: string): RiskGroupKey {
   return "other";
 }
 
+function toPerformanceGroup(city: CityListItem): RiskGroupKey {
+  return toRiskGroup(city.deb_recent_tier);
+}
+
 function normalizeExpandedGroups(
   value: unknown,
 ): Record<RiskGroupKey, boolean> {
@@ -60,11 +64,17 @@ export function CitySidebar() {
   const sortedCities = useMemo(
     () =>
       [...store.cities].sort((a, b) => {
-        const aGroup = toRiskGroup(a.risk_level);
-        const bGroup = toRiskGroup(b.risk_level);
+        const aGroup = toPerformanceGroup(a);
+        const bGroup = toPerformanceGroup(b);
+        const aHitRate = Number(a.deb_recent_hit_rate ?? -1);
+        const bHitRate = Number(b.deb_recent_hit_rate ?? -1);
+        const aSamples = Number(a.deb_recent_sample_count ?? 0);
+        const bSamples = Number(b.deb_recent_sample_count ?? 0);
         return (
           (riskOrder[aGroup] ?? 3) -
             (riskOrder[bGroup] ?? 3) ||
+          bHitRate - aHitRate ||
+          bSamples - aSamples ||
           a.display_name.localeCompare(b.display_name)
         );
       }),
@@ -79,7 +89,7 @@ export function CitySidebar() {
       other: [],
     };
     sortedCities.forEach((city) => {
-      groups[toRiskGroup(city.risk_level)].push(city);
+      groups[toPerformanceGroup(city)].push(city);
     });
     return groups;
   }, [sortedCities]);
@@ -88,7 +98,7 @@ export function CitySidebar() {
     if (!selectedCity) return;
     const selected = store.cities.find((city) => city.name === selectedCity);
     if (!selected) return;
-    const groupKey = toRiskGroup(selected.risk_level);
+    const groupKey = toPerformanceGroup(selected);
     setExpandedGroups((current) =>
       current[groupKey] ? current : { ...current, [groupKey]: true },
     );
@@ -200,6 +210,7 @@ export function CitySidebar() {
                   const deviationSeverity =
                     snapshot?.deviation_monitor?.severity || "normal";
                   const secondaryText = deviationText || peakTempText;
+                  const performanceTier = toPerformanceGroup(city);
 
                   return (
                     <button
@@ -213,7 +224,7 @@ export function CitySidebar() {
                       }
                     >
                       <div className="city-item-main">
-                        <span className={clsx("risk-dot", city.risk_level)} />
+                        <span className={clsx("risk-dot", performanceTier)} />
                         <span className="city-name-text">{city.display_name}</span>
                         <span
                           className={clsx(
diff --git a/frontend/components/dashboard/PanelSections.tsx b/frontend/components/dashboard/PanelSections.tsx
index 40a86e88..8ed51afe 100644
--- a/frontend/components/dashboard/PanelSections.tsx
+++ b/frontend/components/dashboard/PanelSections.tsx
@@ -19,7 +19,6 @@ import {
   getRiskBadgeLabel,
   getTemperatureChartData,
   getWeatherSummary,
-  parseAiAnalysis,
 } from "@/lib/dashboard-utils";
 
 function EmptyState({ text }: { text: string }) {
@@ -760,35 +759,6 @@ export function ForecastTable() {
   );
 }
 
-export function AiAnalysis() {
-  const { data } = useCityData();
-  const { t } = useI18n();
-  if (!data) return null;
-  const ai = parseAiAnalysis(data.ai_analysis);
-
-  return (
-    <section className="ai-section">
-      <h3>{t("section.ai")}</h3>
-      <div className="ai-box">
-        {!ai.summary && ai.bullets.length === 0 ? (
-          <span className="ai-placeholder">{t("section.aiEmpty")}</span>
-        ) : (
-          <>
-            {ai.summary && <div className="ai-summary">{ai.summary}</div>}
-            {ai.bullets.length > 0 && (
-              <ul className="ai-list">
-                {ai.bullets.map((item) => (
-                  <li key={item}>{item}</li>
-                ))}
-              </ul>
-            )}
-          </>
-        )}
-      </div>
-    </section>
-  );
-}
-
 export function RiskInfo() {
   const { data } = useCityData();
   const { t } = useI18n();
diff --git a/frontend/components/terminal/AnalyticsPanel.tsx b/frontend/components/terminal/AnalyticsPanel.tsx
index 1154586c..835d12bc 100644
--- a/frontend/components/terminal/AnalyticsPanel.tsx
+++ b/frontend/components/terminal/AnalyticsPanel.tsx
@@ -4,7 +4,6 @@ import React from "react";
 import {
   BarChart2,
   Target,
-  ShieldAlert,
   Zap,
   Info,
   Activity,
@@ -23,7 +22,7 @@ export function AnalyticsPanel({
   data,
   t = {}, // Default empty for now, can be expanded via context or props
 }: AnalyticsPanelProps) {
-  const { overview, market_scan, models, ai_analysis } = data;
+  const { overview, market_scan, models } = data;
 
   const modelEntries = Object.entries(models)
     .filter(([_, v]) => v !== undefined && v !== null)
@@ -222,25 +221,6 @@ export function AnalyticsPanel({
             ))}
           </div>
         </section>
-
-        {ai_analysis && (
-          <section className="pt-2">
-            <div className="flex items-center gap-2 mb-3">
-              <Activity className="h-3 w-3 text-amber-500" />
-              <span className="text-[10px] font-black uppercase tracking-[0.15em] text-zinc-400">
-                AI COGNITIVE ANALYSIS
-              </span>
-            </div>
-            <div className="rounded-lg border border-zinc-800 bg-zinc-900/30 p-4 relative overflow-hidden group">
-              <div className="absolute top-0 right-0 p-2 opacity-20">
-                <ShieldAlert className="w-8 h-8 text-amber-500" />
-              </div>
-              <p className="text-[11px] leading-relaxed text-zinc-400 relative z-10 font-medium">
-                {ai_analysis}
-              </p>
-            </div>
-          </section>
-        )}
       </div>
 
       {/* Execute Scan Footer */}
diff --git a/frontend/hooks/useDashboardStore.tsx b/frontend/hooks/useDashboardStore.tsx
index 6010617b..adf8dbfb 100644
--- a/frontend/hooks/useDashboardStore.tsx
+++ b/frontend/hooks/useDashboardStore.tsx
@@ -81,96 +81,6 @@ function getInitialProAccessState(): ProAccessState {
   };
 }
 
-const AI_EMPTY_PATTERNS = [
-  /暂无\s*AI\s*分析/i,
-  /当前以结构化气象与模型数据为主/i,
-  /No\s*AI\s*analysis\s*available/i,
-  /Structured\s+meteorological\s+and\s+model\s+data/i,
-];
-
-function normalizeText(value: unknown) {
-  return typeof value === "string" ? value.trim() : "";
-}
-
-function extractAiPayload(analysis: CityDetail["ai_analysis"]) {
-  if (!analysis) {
-    return {
-      bullets: [] as string[],
-      summary: "",
-    };
-  }
-
-  if (typeof analysis === "string") {
-    return {
-      bullets: [] as string[],
-      summary: normalizeText(analysis),
-    };
-  }
-
-  const summary =
-    normalizeText(analysis.summary) ||
-    normalizeText(analysis.text) ||
-    normalizeText(analysis.message);
-  const bulletsSource = Array.isArray(analysis.highlights)
-    ? analysis.highlights
-    : Array.isArray(analysis.points)
-      ? analysis.points
-      : [];
-
-  return {
-    bullets: bulletsSource.map((item) => normalizeText(item)).filter(Boolean),
-    summary,
-  };
-}
-
-function hasMeaningfulAiAnalysis(analysis: CityDetail["ai_analysis"]) {
-  const parsed = extractAiPayload(analysis);
-  const hasBullets = parsed.bullets.length > 0;
-  const hasSummary =
-    Boolean(parsed.summary) &&
-    !AI_EMPTY_PATTERNS.some((pattern) => pattern.test(parsed.summary));
-  return hasBullets || hasSummary;
-}
-
-function normalizeMetarSignature(detail?: CityDetail) {
-  if (!detail) return "";
-  const metar = normalizeText(detail.current?.raw_metar)
-    .replace(/\s+/g, " ")
-    .toUpperCase();
-  const obsTime = normalizeText(detail.current?.obs_time);
-  return [metar, obsTime].filter(Boolean).join("|");
-}
-
-function mergeAiAnalysisIfStable(
-  previousDetail: CityDetail | undefined,
-  nextDetail: CityDetail,
-) {
-  if (!previousDetail) return nextDetail;
-  if (hasMeaningfulAiAnalysis(nextDetail.ai_analysis)) return nextDetail;
-  if (!hasMeaningfulAiAnalysis(previousDetail.ai_analysis)) return nextDetail;
-
-  const prevTemp = Number(previousDetail.current?.temp);
-  const nextTemp = Number(nextDetail.current?.temp);
-  const tempUnchanged =
-    Number.isFinite(prevTemp) &&
-    Number.isFinite(nextTemp) &&
-    prevTemp === nextTemp;
-
-  const prevMetar = normalizeMetarSignature(previousDetail);
-  const nextMetar = normalizeMetarSignature(nextDetail);
-  const metarUnchanged =
-    Boolean(prevMetar) && Boolean(nextMetar) && prevMetar === nextMetar;
-
-  if (!tempUnchanged && !metarUnchanged) {
-    return nextDetail;
-  }
-
-  return {
-    ...nextDetail,
-    ai_analysis: previousDetail.ai_analysis,
-  };
-}
-
 function getMarketScanCacheKey(cityName: string, targetDate?: string | null) {
   const normalizedDate = String(targetDate || "").trim() || "local";
   return `${cityName}::${normalizedDate}`;
@@ -286,7 +196,7 @@ export function DashboardStoreProvider({
         const latestDetail = await dashboardClient.getCityDetail(cityName, {
           force: false,
         });
-        const detail = mergeAiAnalysisIfStable(cached, latestDetail);
+        const detail = latestDetail;
 
         setCityDetailsByName((current) => ({
           ...current,
@@ -337,7 +247,7 @@ export function DashboardStoreProvider({
     const latestDetail = await dashboardClient.getCityDetail(cityName, {
       force,
     });
-    const detail = mergeAiAnalysisIfStable(cached, latestDetail);
+    const detail = latestDetail;
     setCityDetailsByName((current) => ({
       ...current,
       [cityName]: detail,
@@ -608,10 +518,7 @@ export function DashboardStoreProvider({
         const latestDetail = await dashboardClient.getCityDetail(selectedCity, {
           force: true,
         });
-        const detail = mergeAiAnalysisIfStable(
-          previousSelectedDetail,
-          latestDetail,
-        );
+        const detail = latestDetail;
         setCityDetailsByName({ [selectedCity]: detail });
         setCitySummariesByName((current) => ({
           ...current,
diff --git a/frontend/lib/dashboard-types.ts b/frontend/lib/dashboard-types.ts
index f3a5275d..de9b8511 100644
--- a/frontend/lib/dashboard-types.ts
+++ b/frontend/lib/dashboard-types.ts
@@ -6,6 +6,11 @@ export interface CityListItem {
   lat: number;
   lon: number;
   risk_level: RiskLevel;
+  deb_recent_tier?: RiskLevel;
+  deb_recent_hit_rate?: number | null;
+  deb_recent_sample_count?: number;
+  deb_recent_mae?: number | null;
+  deb_recent_last_date?: string | null;
   risk_emoji?: string;
   airport: string;
   icao: string;
diff --git a/frontend/lib/i18n.ts b/frontend/lib/i18n.ts
index a73cb012..7093d162 100644
--- a/frontend/lib/i18n.ts
+++ b/frontend/lib/i18n.ts
@@ -26,10 +26,10 @@ const MESSAGES: Record<Locale, Record<string, string>> = {
     "sidebar.currentTemp": "当前 {temp}",
     "sidebar.peakTempAt": "峰值 {temp} @ {time}",
     "sidebar.peakAt": "峰值 @ {time}",
-    "sidebar.group.high": "高风险",
-    "sidebar.group.medium": "中风险",
-    "sidebar.group.low": "低风险",
-    "sidebar.group.other": "其他",
+    "sidebar.group.high": "近期强势",
+    "sidebar.group.medium": "近期一般",
+    "sidebar.group.low": "近期偏弱",
+    "sidebar.group.other": "样本不足",
 
     "dashboard.loading": "正在同步站点观测与结算源，请稍候...",
 
@@ -189,10 +189,10 @@ const MESSAGES: Record<Locale, Record<string, string>> = {
     "sidebar.currentTemp": "Current {temp}",
     "sidebar.peakTempAt": "Peak {temp} @ {time}",
     "sidebar.peakAt": "Peak @ {time}",
-    "sidebar.group.high": "High Risk",
-    "sidebar.group.medium": "Medium Risk",
-    "sidebar.group.low": "Low Risk",
-    "sidebar.group.other": "Others",
+    "sidebar.group.high": "Recent Strong",
+    "sidebar.group.medium": "Recent Mixed",
+    "sidebar.group.low": "Recent Weak",
+    "sidebar.group.other": "Low Sample",
 
     "dashboard.loading":
       "Synchronizing station observations and settlement feeds...",
diff --git a/scripts/backfill_recent_daily_actuals_from_metar.py b/scripts/backfill_recent_daily_actuals_from_metar.py
index 98bfd1b7..b3a72e45 100644
--- a/scripts/backfill_recent_daily_actuals_from_metar.py
+++ b/scripts/backfill_recent_daily_actuals_from_metar.py
@@ -25,7 +25,7 @@ def _target_dates(city_info: dict, lookback_days: int) -> list[str]:
 
 def _is_metar_city(city_info: dict) -> bool:
     source = str(city_info.get("settlement_source") or "metar").strip().lower()
-    return source in {"metar", "hko", "noaa", "wunderground"}
+    return source in {"metar", "hko", "noaa"}
 
 
 def main() -> None:
diff --git a/src/analysis/city_query_service.py b/src/analysis/city_query_service.py
index ce9d0772..3cddf5d1 100644
--- a/src/analysis/city_query_service.py
+++ b/src/analysis/city_query_service.py
@@ -335,7 +335,7 @@ def build_city_query_report(
         sc_current = {}
     city_meta = CITY_REGISTRY.get(city_name.lower(), {})
     settlement_source, settlement_source_label = _resolve_settlement_source(city_meta)
-    use_settlement_current = settlement_source in {"hko", "cwa", "noaa", "wunderground"} and bool(sc_current)
+    use_settlement_current = settlement_source in {"hko", "cwa", "noaa"} and bool(sc_current)
     fallback_utc_offset = int(city_meta.get("tz_offset", 0))
     nws_periods = ((weather_data.get("nws") or {}).get("forecast_periods") or [])
     if nws_periods:
diff --git a/src/analysis/deb_algorithm.py b/src/analysis/deb_algorithm.py
index 92b24c1a..5b177ac5 100644
--- a/src/analysis/deb_algorithm.py
+++ b/src/analysis/deb_algorithm.py
@@ -4,7 +4,6 @@ from datetime import datetime, timedelta
 from typing import Optional
 import requests
 from src.analysis.settlement_rounding import apply_city_settlement
-from src.data_collection.wunderground_sources import fetch_wunderground_historical_high
 from loguru import logger
 from src.database.runtime_state import (
     DailyRecordRepository,
@@ -630,76 +629,13 @@ def _reconcile_recent_noaa_actual_highs(city_name: str, lookback_days: int = 14)
 
 
 def _reconcile_recent_wunderground_actual_highs(city_name: str, lookback_days: int = 14):
-    try:
-        city_key, city_meta = _resolve_city_history_context(city_name)
-        if not city_key or not isinstance(city_meta, dict):
-            return {"ok": False, "reason": "unknown_city", "updated": 0}
-
-        settlement_url = str(city_meta.get("settlement_url") or "").strip()
-        if not settlement_url:
-            return {"ok": False, "reason": "missing_settlement_url", "updated": 0}
-
-        tz_offset = int(city_meta.get("tz_offset") or 0)
-        history_file = _get_history_file_path()
-        data = load_history(history_file)
-        city_data = data.get(city_key) or {}
-        if not isinstance(city_data, dict) or not city_data:
-            return {"ok": True, "reason": "no_city_history", "updated": 0}
-
-        local_now = datetime.utcnow() + timedelta(seconds=tz_offset)
-        local_today = local_now.strftime("%Y-%m-%d")
-        cutoff = (local_now - timedelta(days=max(lookback_days, 1) + 1)).strftime(
-            "%Y-%m-%d"
-        )
-        target_dates = sorted(
-            d for d in city_data.keys() if isinstance(d, str) and cutoff <= d < local_today
-        )
-        if not target_dates:
-            return {"ok": True, "reason": "no_target_dates", "updated": 0}
-
-        updated = 0
-        scanned_dates = 0
-        for date_str in target_dates:
-            result = fetch_wunderground_historical_high(city_key, date_str, url=settlement_url)
-            if not result.get("ok"):
-                continue
-            scanned_dates += 1
-            corrected = _sf(result.get("actual_high"))
-            if corrected is None:
-                continue
-            rec = city_data.get(date_str) or {}
-            old = rec.get("actual_high")
-            try:
-                old_val = float(old) if old is not None else None
-            except Exception:
-                old_val = None
-            if old_val is None or abs(old_val - corrected) >= 0.1:
-                rec["actual_high"] = corrected
-                city_data[date_str] = rec
-                updated += 1
-            _persist_truth_record(
-                city_key,
-                date_str,
-                corrected,
-                city_meta=city_meta,
-                updated_by="backfill:wunderground_history",
-                reason="reconcile_recent_actual_highs",
-                source_payload=result,
-            )
-
-        if updated > 0:
-            data[city_key] = city_data
-            save_history(history_file, data)
-
-        return {
-            "ok": True,
-            "updated": updated,
-            "scanned_dates": scanned_dates,
-            "station_code": city_meta.get("settlement_station_code"),
-            "source": "wunderground",
-        }
-    except Exception as e:
-        return {"ok": False, "reason": str(e), "updated": 0}
+    return {
+        "ok": True,
+        "reason": "wunderground_crawler_removed",
+        "updated": 0,
+        "scanned_dates": 0,
+        "source": "wunderground",
+    }
 
 
 def reconcile_recent_actual_highs(city_name: str, lookback_days: int = 7):
@@ -732,14 +668,14 @@ def bootstrap_recent_daily_history_if_missing(city_name: str, lookback_days: int
             return {"ok": False, "reason": "unknown_city", "seeded": 0, "updated": 0}
 
         settlement_source = str(city_meta.get("settlement_source") or "metar").strip().lower()
-        if settlement_source not in {"metar", "hko", "noaa", "wunderground"}:
+        if settlement_source not in {"metar", "hko", "noaa"}:
             return {"ok": True, "reason": "unsupported_settlement_source", "seeded": 0, "updated": 0}
 
         icao = str(city_meta.get("icao") or "").strip().upper()
         station_code = str(city_meta.get("settlement_station_code") or "").strip().upper()
         if settlement_source == "metar" and not icao:
             return {"ok": False, "reason": "missing_icao", "seeded": 0, "updated": 0}
-        if settlement_source in {"hko", "noaa", "wunderground"} and not station_code:
+        if settlement_source in {"hko", "noaa"} and not station_code:
             return {"ok": False, "reason": "missing_station_code", "seeded": 0, "updated": 0}
 
         tz_offset = int(city_meta.get("tz_offset") or 0)
diff --git a/src/data_collection/settlement_sources.py b/src/data_collection/settlement_sources.py
index e9a6e52e..78b7afef 100644
--- a/src/data_collection/settlement_sources.py
+++ b/src/data_collection/settlement_sources.py
@@ -600,14 +600,8 @@ class SettlementSourceMixin:
             city_meta = CITY_REGISTRY.get(normalized) or {}
             settlement_source = str(city_meta.get("settlement_source") or "").strip().lower()
             if settlement_source == "wunderground":
-                settlement_url = str(city_meta.get("settlement_url") or "").strip()
-                if settlement_url:
-                    return self.fetch_wunderground_settlement_current(
-                        normalized,
-                        url=settlement_url,
-                        station_label=str(city_meta.get("settlement_station_label") or "").strip() or None,
-                        icao=str(city_meta.get("icao") or "").strip() or None,
-                    )
+                logger.info("Settlement current skipped city={} source=wunderground reason=crawler_removed", city)
+                return None
             if settlement_source == "hko":
                 raw_candidates = city_meta.get("settlement_station_candidates") or []
                 if isinstance(raw_candidates, str):
diff --git a/src/data_collection/weather_sources.py b/src/data_collection/weather_sources.py
index a60b4433..a2a1721e 100644
--- a/src/data_collection/weather_sources.py
+++ b/src/data_collection/weather_sources.py
@@ -10,10 +10,9 @@ from src.data_collection.settlement_sources import SettlementSourceMixin
 from src.data_collection.metar_sources import MetarSourceMixin
 from src.data_collection.mgm_sources import MgmSourceMixin
 from src.data_collection.nws_open_meteo_sources import NwsOpenMeteoSourceMixin
-from src.data_collection.wunderground_sources import WundergroundSourceMixin
 
 
-class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSourceMixin, MgmSourceMixin, NwsOpenMeteoSourceMixin, WundergroundSourceMixin):
+class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSourceMixin, MgmSourceMixin, NwsOpenMeteoSourceMixin):
     """
     Multi-source weather data collector
 
@@ -108,8 +107,6 @@ class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSour
 
     def __init__(self, config: dict):
         self.config = config
-        weather_cfg = config.get("weather", {})
-        self.wunderground_key = weather_cfg.get("wunderground_api_key")
 
         self.timeout = 30  # 增加超时以支持高延迟 VPS
         self.session = requests.Session()
diff --git a/src/data_collection/wunderground_sources.py b/src/data_collection/wunderground_sources.py
deleted file mode 100644
index 027c6303..00000000
--- a/src/data_collection/wunderground_sources.py
+++ /dev/null
@@ -1,595 +0,0 @@
-from __future__ import annotations
-
-import json
-import re
-from datetime import datetime, timedelta, timezone
-from typing import Any, Dict, Optional
-
-import requests
-from loguru import logger
-from src.data_collection.city_registry import CITY_REGISTRY
-from src.analysis.settlement_rounding import apply_city_settlement
-
-
-class WundergroundSourceMixin:
-    _WU_PAGE_TTL_SEC = 180
-
-    def _fetch_wunderground_page(self, url: str) -> Optional[str]:
-        cache_key = f"wu:page:{url}"
-        cached = self._get_settlement_cache(cache_key)
-        if isinstance(cached, dict):
-            html = str(cached.get("html") or "")
-            if html:
-                return html
-
-        try:
-            response = self.session.get(
-                url,
-                headers={
-                    "User-Agent": "Mozilla/5.0",
-                    "Referer": url,
-                },
-                timeout=self.timeout,
-            )
-            response.raise_for_status()
-            html = str(response.text or "")
-            if not html:
-                return None
-            ttl_backup = getattr(self, "settlement_cache_ttl_sec", self._WU_PAGE_TTL_SEC)
-            try:
-                self.settlement_cache_ttl_sec = self._WU_PAGE_TTL_SEC
-                self._set_settlement_cache(cache_key, {"html": html})
-            finally:
-                self.settlement_cache_ttl_sec = ttl_backup
-            return html
-        except Exception as exc:
-            logger.warning(f"Wunderground page fetch failed url={url}: {exc}")
-            return None
-
-    def _fetch_wunderground_history_page(self, url: str) -> Optional[str]:
-        if not url:
-            return None
-        cache_key = f"wu:history:{url}"
-        cached = self._get_settlement_cache(cache_key)
-        if isinstance(cached, dict):
-            html = str(cached.get("html") or "")
-            if html:
-                return html
-
-        try:
-            response = self.session.get(
-                url,
-                headers={
-                    "User-Agent": "Mozilla/5.0",
-                    "Referer": url,
-                },
-                timeout=self.timeout,
-            )
-            response.raise_for_status()
-            html = str(response.text or "")
-            if not html:
-                return None
-            ttl_backup = getattr(self, "settlement_cache_ttl_sec", self._WU_PAGE_TTL_SEC)
-            try:
-                self.settlement_cache_ttl_sec = self._WU_PAGE_TTL_SEC
-                self._set_settlement_cache(cache_key, {"html": html})
-            finally:
-                self.settlement_cache_ttl_sec = ttl_backup
-            return html
-        except Exception as exc:
-            logger.warning(f"Wunderground history page fetch failed url={url}: {exc}")
-            return None
-
-    @staticmethod
-    def _wu_extract_app_state(html: str) -> Optional[Dict[str, Any]]:
-        match = re.search(
-            r'<script id="app-root-state" type="application/json">(.*?)</script>',
-            html,
-            re.IGNORECASE | re.DOTALL,
-        )
-        if not match:
-            return None
-        try:
-            payload = json.loads(str(match.group(1) or ""))
-            return payload if isinstance(payload, dict) else None
-        except Exception:
-            return None
-
-    @staticmethod
-    def _wu_extract_station_history_url(html: str) -> Optional[str]:
-        match = re.search(
-            r'<div[^>]*class="station-name"[^>]*>\s*<a[^>]+href="([^"]*?/history/daily/[^"]+)"',
-            html,
-            re.IGNORECASE | re.DOTALL,
-        )
-        if not match:
-            return None
-        href = str(match.group(1) or "").strip()
-        if not href:
-            return None
-        if href.startswith("http://") or href.startswith("https://"):
-            return href
-        return f"https://www.wunderground.com{href}"
-
-    @staticmethod
-    def _wu_extract_station_id_from_history_url(url: Optional[str]) -> Optional[str]:
-        text = str(url or "").strip()
-        if not text:
-            return None
-        match = re.search(r"/history/daily/(?:[^/]+/){1,3}([^/]+)/date/", text, re.IGNORECASE)
-        return str(match.group(1) or "").strip() or None if match else None
-
-    @staticmethod
-    def _wu_extract_station_name_from_history_url(url: Optional[str]) -> Optional[str]:
-        text = str(url or "").strip()
-        if not text:
-            return None
-        match = re.search(r"/history/daily/(?:[^/]+/){1,3}([^/]+)/date/", text, re.IGNORECASE)
-        return str(match.group(1) or "").strip() or None if match else None
-
-    @staticmethod
-    def _safe_float(value: Any) -> Optional[float]:
-        if value is None:
-            return None
-        text = str(value).strip()
-        if not text:
-            return None
-        try:
-            return float(text)
-        except Exception:
-            return None
-
-    @staticmethod
-    def _wu_extract_station_name(html: str, fallback_icao: str) -> Optional[str]:
-        pattern = re.compile(
-            r'</lib-display-unit>\s*([^<]+?)\s*</a>',
-            re.IGNORECASE,
-        )
-        for match in pattern.finditer(html):
-            candidate = re.sub(r"\s+", " ", str(match.group(1) or "")).strip()
-            if fallback_icao.lower() in candidate.lower() or "station" in candidate.lower():
-                return candidate
-        return None
-
-    @staticmethod
-    def _wu_extract_station_temperature(
-        html: str,
-        *,
-        station_name: Optional[str],
-    ) -> tuple[Optional[float], Optional[str]]:
-        station_anchor = station_name or "Station"
-        station_pos = html.find(station_anchor)
-        if station_pos < 0:
-            station_pos = html.lower().find("station-name")
-        if station_pos < 0:
-            return None, None
-
-        window_start = max(0, station_pos - 1800)
-        window = html[window_start:station_pos]
-        temp_match = re.search(
-            r'wu-value[^>]*>\s*(-?\d+(?:\.\d+)?)\s*</span>.*?<span[^>]*>\s*([CF])\s*</span>',
-            window,
-            re.IGNORECASE | re.DOTALL,
-        )
-        if not temp_match:
-            return None, None
-
-        try:
-            value = float(temp_match.group(1))
-        except Exception:
-            return None, None
-        unit = str(temp_match.group(2) or "").upper().strip() or None
-        return value, unit
-
-    @staticmethod
-    def _wu_to_celsius(value: Optional[float], unit: Optional[str]) -> Optional[float]:
-        if value is None:
-            return None
-        normalized = str(unit or "").upper().strip()
-        if normalized == "F":
-            return round((float(value) - 32.0) * 5.0 / 9.0, 1)
-        return round(float(value), 1)
-
-    @staticmethod
-    def _wu_parse_observation_iso(raw: Optional[str], utc_offset_seconds: int) -> Optional[str]:
-        text = str(raw or "").strip()
-        if not text:
-            return None
-        try:
-            parsed = datetime.strptime(text, "%Y-%m-%dT%H:%M:%S%z")
-            return parsed.astimezone(timezone.utc).isoformat()
-        except Exception:
-            pass
-        try:
-            parsed = datetime.strptime(text, "%Y-%m-%d %H:%M:%S")
-            parsed = parsed.replace(tzinfo=timezone(timedelta(seconds=utc_offset_seconds)))
-            return parsed.astimezone(timezone.utc).isoformat()
-        except Exception:
-            return None
-
-    @staticmethod
-    def _wu_parse_history_time(raw: Any, utc_offset_seconds: int) -> Optional[str]:
-        if raw is None:
-            return None
-        if isinstance(raw, (int, float)):
-            try:
-                return datetime.fromtimestamp(float(raw), timezone.utc).isoformat()
-            except Exception:
-                return None
-        text = str(raw).strip()
-        if not text:
-            return None
-        for fmt in (
-            "%Y-%m-%dT%H:%M:%S%z",
-            "%Y-%m-%dT%H:%M:%S",
-            "%Y-%m-%d %H:%M:%S",
-            "%Y-%m-%d %H:%M",
-        ):
-            try:
-                parsed = datetime.strptime(text, fmt)
-                if parsed.tzinfo is None:
-                    parsed = parsed.replace(tzinfo=timezone(timedelta(seconds=utc_offset_seconds)))
-                return parsed.astimezone(timezone.utc).isoformat()
-            except Exception:
-                continue
-        return None
-
-    @classmethod
-    def _wu_observation_temp_c(cls, obs: Dict[str, Any]) -> Optional[float]:
-        if not isinstance(obs, dict):
-            return None
-        metric = obs.get("metric")
-        if isinstance(metric, dict):
-            for key in ("temp", "temperature", "tempAvg", "temperatureAvg"):
-                value = cls._safe_float(metric.get(key))
-                if value is not None:
-                    return round(float(value), 1)
-        imperial = obs.get("imperial")
-        if isinstance(imperial, dict):
-            for key in ("temp", "temperature", "tempAvg", "temperatureAvg"):
-                value = cls._safe_float(imperial.get(key))
-                if value is not None:
-                    return cls._wu_to_celsius(value, "F")
-        for key in ("temp", "temperature"):
-            value = cls._safe_float(obs.get(key))
-            if value is not None:
-                return round(float(value), 1)
-        return None
-
-    @classmethod
-    def _wu_observation_time_iso(cls, obs: Dict[str, Any], utc_offset_seconds: int) -> Optional[str]:
-        if not isinstance(obs, dict):
-            return None
-        for key in ("validTimeLocal", "obsTimeLocal", "observationTime", "timestamp", "validTimeUtc", "epoch"):
-            value = obs.get(key)
-            parsed = cls._wu_parse_history_time(value, utc_offset_seconds)
-            if parsed:
-                return parsed
-        return None
-
-    @classmethod
-    def _wu_iter_lists(cls, node: Any):
-        if isinstance(node, dict):
-            for value in node.values():
-                yield from cls._wu_iter_lists(value)
-        elif isinstance(node, list):
-            yield node
-            for item in node:
-                yield from cls._wu_iter_lists(item)
-
-    @classmethod
-    def _wu_extract_history_observations(
-        cls,
-        app_state: Dict[str, Any],
-        *,
-        utc_offset_seconds: int,
-    ) -> list[dict[str, Any]]:
-        best: list[dict[str, Any]] = []
-        for candidate in cls._wu_iter_lists(app_state):
-            if not candidate or not all(isinstance(item, dict) for item in candidate):
-                continue
-            parsed: list[dict[str, Any]] = []
-            seen_times: set[str] = set()
-            for item in candidate:
-                temp_c = cls._wu_observation_temp_c(item)
-                time_iso = cls._wu_observation_time_iso(item, utc_offset_seconds)
-                if temp_c is None or not time_iso:
-                    continue
-                try:
-                    local_dt = datetime.fromisoformat(time_iso.replace("Z", "+00:00")).astimezone(
-                        timezone(timedelta(seconds=utc_offset_seconds))
-                    )
-                except Exception:
-                    continue
-                hhmm = local_dt.strftime("%H:%M")
-                if hhmm in seen_times:
-                    continue
-                seen_times.add(hhmm)
-                parsed.append({"time": hhmm, "temp": round(float(temp_c), 1)})
-            if len(parsed) > len(best):
-                best = parsed
-        return best
-
-    @staticmethod
-    def _wu_find_current_observation_block(
-        app_state: Dict[str, Any],
-        *,
-        icao: Optional[str],
-    ) -> Optional[Dict[str, Any]]:
-        normalized_icao = str(icao or "").strip().upper()
-        fallback_block: Optional[Dict[str, Any]] = None
-        for value in app_state.values():
-            if not isinstance(value, dict):
-                continue
-            url = str(value.get("u") or "")
-            body = value.get("b")
-            if not isinstance(body, dict) or "observations/current" not in url:
-                continue
-            if normalized_icao and f"icaoCode={normalized_icao}" in url:
-                return body
-            if fallback_block is None:
-                fallback_block = body
-        return fallback_block
-
-    def fetch_wunderground_settlement_current(
-        self,
-        city: str,
-        *,
-        url: str,
-        station_label: Optional[str] = None,
-        icao: Optional[str] = None,
-    ) -> Optional[Dict[str, Any]]:
-        normalized_city = str(city or "").strip().lower()
-        cache_key = f"wu:settlement:{normalized_city}"
-        cached = self._get_settlement_cache(cache_key)
-        if cached:
-            return cached
-
-        html = self._fetch_wunderground_page(url)
-        if not html:
-            return None
-
-        city_meta = CITY_REGISTRY.get(normalized_city) or {}
-        utc_offset_seconds = int(city_meta.get("tz_offset") or 0)
-        fallback_icao = str(icao or "").strip().upper()
-        history_url = self._wu_extract_station_history_url(html)
-        station_id = self._wu_extract_station_id_from_history_url(history_url)
-        station_name = (
-            station_label
-            or self._wu_extract_station_name(html, fallback_icao)
-            or self._wu_extract_station_name_from_history_url(history_url)
-            or fallback_icao
-            or str(city or "").title()
-        )
-
-        app_state = self._wu_extract_app_state(html) or {}
-        current_block = self._wu_find_current_observation_block(app_state, icao=fallback_icao)
-
-        display_temp = None
-        display_unit = "F"
-        obs_iso = None
-        humidity = None
-        wind_speed_kt = None
-        wind_dir = None
-        wx_phrase = None
-        dewpoint_c = None
-        official_high_c = None
-        official_low_c = None
-
-        if current_block:
-            display_temp = self._safe_float(current_block.get("temperature"))
-            obs_iso = self._wu_parse_observation_iso(
-                current_block.get("validTimeLocal"),
-                utc_offset_seconds,
-            )
-            humidity = self._safe_float(current_block.get("relativeHumidity"))
-            wind_speed_kt = self._safe_float(current_block.get("windSpeed"))
-            wind_dir = str(current_block.get("windDirectionCardinal") or "").strip() or None
-            wx_phrase = str(current_block.get("wxPhraseLong") or "").strip() or None
-            dewpoint_c = self._wu_to_celsius(
-                self._safe_float(current_block.get("temperatureDewPoint")),
-                "F",
-            )
-            official_high_c = self._wu_to_celsius(
-                self._safe_float(
-                    current_block.get("temperatureMaxSince7Am")
-                    or current_block.get("temperatureMax24Hour")
-                ),
-                "F",
-            )
-            official_low_c = self._wu_to_celsius(
-                self._safe_float(current_block.get("temperatureMin24Hour")),
-                "F",
-            )
-
-        if display_temp is None:
-            display_temp, display_unit = self._wu_extract_station_temperature(
-                html,
-                station_name=station_name,
-            )
-        temp_c = self._wu_to_celsius(self._safe_float(display_temp), display_unit)
-        if temp_c is None:
-            logger.warning(f"Wunderground temperature parse failed city={city} url={url}")
-            return None
-
-        obs_iso = obs_iso or datetime.now(timezone.utc).isoformat()
-        today_obs: list[dict[str, Any]] = []
-        history_html = self._fetch_wunderground_history_page(history_url) if history_url else None
-        history_state = self._wu_extract_app_state(history_html or "") if history_html else None
-        history_obs = (
-            self._wu_extract_history_observations(
-                history_state or {},
-                utc_offset_seconds=utc_offset_seconds,
-            )
-            if isinstance(history_state, dict)
-            else []
-        )
-        if history_obs:
-            today_obs = history_obs
-            for point in history_obs:
-                point_time = str(point.get("time") or "").strip()
-                point_temp = self._safe_float(point.get("temp"))
-                if not point_time or point_temp is None:
-                    continue
-                try:
-                    local_dt = datetime.strptime(point_time, "%H:%M").replace(
-                        year=datetime.now(timezone(timedelta(seconds=utc_offset_seconds))).year,
-                        month=datetime.now(timezone(timedelta(seconds=utc_offset_seconds))).month,
-                        day=datetime.now(timezone(timedelta(seconds=utc_offset_seconds))).day,
-                        tzinfo=timezone(timedelta(seconds=utc_offset_seconds)),
-                    )
-                    self._update_official_today_obs(
-                        source_code="wunderground",
-                        station_code=station_id or fallback_icao or normalized_city,
-                        obs_iso=local_dt.astimezone(timezone.utc).isoformat(),
-                        current_temp=point_temp,
-                        utc_offset_seconds=utc_offset_seconds,
-                    )
-                except Exception:
-                    continue
-        else:
-            today_obs = self._update_official_today_obs(
-                source_code="wunderground",
-                station_code=station_id or fallback_icao or normalized_city,
-                obs_iso=obs_iso,
-                current_temp=temp_c,
-                utc_offset_seconds=utc_offset_seconds,
-            )
-
-        sampled_max = None
-        sampled_max_time = None
-        sampled_low = None
-        if today_obs:
-            hottest = max(today_obs, key=lambda item: float(item.get("temp") or -999))
-            coldest = min(today_obs, key=lambda item: float(item.get("temp") or 999))
-            sampled_max = self._wu_to_celsius(float(hottest.get("temp")), "C")
-            sampled_max_time = str(hottest.get("time") or "").strip() or None
-            sampled_low = self._wu_to_celsius(float(coldest.get("temp")), "C")
-
-        max_so_far = official_high_c if official_high_c is not None else sampled_max
-        today_low = official_low_c if official_low_c is not None else sampled_low
-        max_temp_time = sampled_max_time
-        if max_so_far is not None and abs(float(max_so_far) - float(temp_c)) < 0.05:
-            try:
-                local_obs = datetime.fromisoformat(obs_iso.replace("Z", "+00:00")).astimezone(
-                    timezone(timedelta(seconds=utc_offset_seconds))
-                )
-                max_temp_time = local_obs.strftime("%H:%M")
-            except Exception:
-                pass
-
-        payload: Dict[str, Any] = {
-            "source": "wunderground",
-            "source_label": "Wunderground",
-            "station_code": station_id or fallback_icao or None,
-            "station_name": station_name,
-            "observation_time": obs_iso,
-            "source_url": url,
-            "history_url": history_url,
-            "current": {
-                "temp": temp_c,
-                "display_temp": display_temp,
-                "display_unit": display_unit,
-                "max_temp_so_far": max_so_far,
-                "max_temp_time": max_temp_time,
-                "today_low": today_low,
-                "humidity": humidity,
-                "wind_speed_kt": wind_speed_kt,
-                "wind_dir": wind_dir,
-                "cloud_desc": wx_phrase,
-                "dewpoint": dewpoint_c,
-            },
-            "today_obs": today_obs,
-            "unit": "celsius",
-        }
-        self._set_settlement_cache(cache_key, payload)
-        return payload
-
-
-def _normalize_wu_history_date_url(url: str, target_date: str) -> str:
-    normalized = str(url or "").strip().rstrip("/")
-    normalized = re.sub(r"/date/\d{4}-\d{2}-\d{2}$", "", normalized, flags=re.IGNORECASE)
-    return f"{normalized}/date/{target_date}"
-
-
-def fetch_wunderground_historical_high(
-    city: str,
-    target_date: str,
-    *,
-    url: Optional[str] = None,
-    timeout: int = 15,
-    session: Optional[requests.Session] = None,
-) -> Dict[str, Any]:
-    city_key = str(city or "").strip().lower()
-    city_meta = CITY_REGISTRY.get(city_key) or {}
-    history_url = _normalize_wu_history_date_url(
-        url or str(city_meta.get("settlement_url") or "").strip(),
-        target_date,
-    )
-    if not history_url:
-        return {"ok": False, "reason": "missing_history_url", "city": city_key, "date": target_date}
-
-    requester = session or requests.Session()
-    try:
-        response = requester.get(
-            history_url,
-            headers={
-                "User-Agent": "Mozilla/5.0",
-                "Referer": history_url,
-            },
-            timeout=timeout,
-        )
-        response.raise_for_status()
-        html = str(response.text or "")
-    except Exception as exc:
-        logger.warning(f"Wunderground history fetch failed city={city_key} date={target_date}: {exc}")
-        return {
-            "ok": False,
-            "reason": "fetch_failed",
-            "city": city_key,
-            "date": target_date,
-            "history_url": history_url,
-            "error": str(exc),
-        }
-
-    app_state = WundergroundSourceMixin._wu_extract_app_state(html)
-    if not isinstance(app_state, dict):
-        return {
-            "ok": False,
-            "reason": "missing_app_state",
-            "city": city_key,
-            "date": target_date,
-            "history_url": history_url,
-        }
-
-    utc_offset_seconds = int(city_meta.get("tz_offset") or 0)
-    obs = WundergroundSourceMixin._wu_extract_history_observations(
-        app_state,
-        utc_offset_seconds=utc_offset_seconds,
-    )
-    if not obs:
-        return {
-            "ok": False,
-            "reason": "missing_observations",
-            "city": city_key,
-            "date": target_date,
-            "history_url": history_url,
-        }
-
-    raw_max_temp_c = max(float(point.get("temp")) for point in obs if point.get("temp") is not None)
-    settled_actual_high = apply_city_settlement(city_key, raw_max_temp_c)
-    station_code = str(city_meta.get("settlement_station_code") or "").strip().upper() or None
-    station_label = str(city_meta.get("settlement_station_label") or "").strip() or None
-    return {
-        "ok": True,
-        "city": city_key,
-        "date": target_date,
-        "history_url": history_url,
-        "raw_max_temp_c": round(raw_max_temp_c, 1),
-        "actual_high": float(settled_actual_high),
-        "settlement_source": "wunderground",
-        "settlement_station_code": station_code,
-        "settlement_station_label": station_label,
-        "observation_count": len(obs),
-        "observations": obs,
-    }
diff --git a/src/utils/config_loader.py b/src/utils/config_loader.py
index f151bd55..1dadb170 100644
--- a/src/utils/config_loader.py
+++ b/src/utils/config_loader.py
@@ -22,7 +22,6 @@ def load_config():
     config = {
         "weather": {
             "openweather_api_key": get_env_or_none("OPENWEATHER_API_KEY"),
-            "wunderground_api_key": get_env_or_none("WUNDERGROUND_API_KEY"),
             "visualcrossing_api_key": get_env_or_none("VISUALCROSSING_API_KEY"),
             "proxy": os.getenv("HTTPS_PROXY") or os.getenv("HTTP_PROXY"),
         },
diff --git a/tests/test_web_observability.py b/tests/test_web_observability.py
index 1d614714..722c594b 100644
--- a/tests/test_web_observability.py
+++ b/tests/test_web_observability.py
@@ -52,6 +52,8 @@ def test_cities_endpoint_uses_denver_display_name_for_aurora_market():
     payload = response.json()
     aurora = next(item for item in payload["cities"] if item["name"] == "aurora")
     assert aurora["display_name"] == "Denver"
+    assert aurora["deb_recent_tier"] in {"high", "medium", "low", "other"}
+    assert "deb_recent_sample_count" in aurora
 
 
 def test_cities_endpoint_includes_new_wunderground_cities():
diff --git a/tests/test_wunderground_history.py b/tests/test_wunderground_history.py
deleted file mode 100644
index e40ecb85..00000000
--- a/tests/test_wunderground_history.py
+++ /dev/null
@@ -1,44 +0,0 @@
-from src.data_collection.wunderground_sources import fetch_wunderground_historical_high
-
-
-class _FakeResponse:
-    def __init__(self, text: str):
-        self.text = text
-
-    def raise_for_status(self):
-        return None
-
-
-class _FakeSession:
-    def __init__(self, text: str):
-        self._text = text
-
-    def get(self, url, headers=None, timeout=None):
-        return _FakeResponse(self._text)
-
-
-def test_fetch_wunderground_historical_high_parses_daily_max():
-    html = """
-    <html><body>
-    <script id="app-root-state" type="application/json">
-    {
-      "x": {
-        "history": [
-          {"validTimeLocal": "2026-04-05T09:00:00+0800", "metric": {"temp": 24.4}},
-          {"validTimeLocal": "2026-04-05T13:00:00+0800", "metric": {"temp": 28.6}},
-          {"validTimeLocal": "2026-04-05T15:00:00+0800", "metric": {"temp": 27.9}}
-        ]
-      }
-    }
-    </script>
-    </body></html>
-    """
-    result = fetch_wunderground_historical_high(
-        "taipei",
-        "2026-04-05",
-        session=_FakeSession(html),
-    )
-    assert result["ok"] is True
-    assert result["settlement_source"] == "wunderground"
-    assert result["settlement_station_code"] == "RCSS"
-    assert result["actual_high"] == 29.0
diff --git a/web/analysis_service.py b/web/analysis_service.py
index 9958af3c..794e1880 100644
--- a/web/analysis_service.py
+++ b/web/analysis_service.py
@@ -22,7 +22,6 @@ from web.core import (
 )
 from src.analysis.deb_algorithm import calculate_dynamic_weights
 from src.analysis.settlement_rounding import apply_city_settlement
-from src.analysis.metar_narrator import describe_metar_report
 from src.data_collection.city_registry import ALIASES
 from src.models.lgbm_daily_high import predict_lgbm_daily_high
 
@@ -1166,7 +1165,6 @@ def _analyze(city: str, force_refresh: bool = False) -> Dict[str, Any]:
     probability_raw_sigma = None
     probability_calibrated_mu = None
     probability_calibrated_sigma = None
-    ai_text = ""
     dynamic_commentary = {"summary": "", "notes": []}
     try:
         _, _ai_context, sd = _trend_analyze(raw, sym, city)
@@ -1196,21 +1194,6 @@ def _analyze(city: str, force_refresh: bool = False) -> Dict[str, Any]:
     except Exception as e:
         logger.warning(f"Structured analysis skipped for {city}: {e}")
 
-    ai_text = describe_metar_report(
-        raw_metar=str(primary_current.get("raw_metar") or mc.get("raw_metar") or ""),
-        temp_symbol=sym,
-        fallback={
-            "icao": metar.get("icao"),
-            "station_name": metar.get("station_name"),
-            "temp": cur_temp,
-            "wind_speed_kt": _sf(primary_current.get("wind_speed_kt")),
-            "wind_dir": _sf(primary_current.get("wind_dir")),
-            "altimeter": _sf(primary_current.get("altimeter")),
-            "wx_desc": primary_current.get("wx_desc"),
-            "clouds": primary_current.get("clouds", []) or mc.get("clouds", []),
-        },
-    )
-
     # ── 12. Hourly data (today only, for chart) ──
     today_hourly: Dict[str, list] = {"times": [], "temps": [], "radiation": []}
     for i, ts in enumerate(h_times):
@@ -1562,7 +1545,7 @@ def _analyze(city: str, force_refresh: bool = False) -> Dict[str, Any]:
         "metar_today_obs": metar_today_obs_payload,
         "metar_recent_obs": metar_recent_obs_payload,
         "settlement_today_obs": settlement_today_obs,
-        "ai_analysis": ai_text,
+        "ai_analysis": "",
         "updated_at": datetime.now(timezone.utc).isoformat(),
     }
 
diff --git a/web/routes.py b/web/routes.py
index 4bf22e49..ec894219 100644
--- a/web/routes.py
+++ b/web/routes.py
@@ -13,6 +13,7 @@ from src.analysis.deb_algorithm import (
     load_history,
 )
 from src.analysis.probability_snapshot_archive import load_snapshot_rows_for_day
+from src.analysis.settlement_rounding import apply_city_settlement
 from src.data_collection.city_registry import ALIASES
 from src.database.runtime_state import TruthRecordRepository
 from src.utils.metrics import export_prometheus_metrics
@@ -53,6 +54,9 @@ from web.core import (
 
 router = APIRouter()
 
+_DEB_RECENT_LOOKBACK = 7
+_DEB_RECENT_MIN_SAMPLES = 3
+
 TRACKABLE_ANALYTICS_EVENTS = {
     "signup_completed",
     "dashboard_active",
@@ -174,6 +178,69 @@ def _normalize_city_or_404(name: str) -> str:
     return city
 
 
+def _history_file_path() -> str:
+    project_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+    return os.path.join(project_root, "data", "daily_records.json")
+
+
+def _build_recent_deb_performance_index(
+    history_data: Optional[dict] = None,
+    *,
+    lookback: int = _DEB_RECENT_LOOKBACK,
+    min_samples: int = _DEB_RECENT_MIN_SAMPLES,
+) -> dict[str, dict[str, object]]:
+    data = history_data if isinstance(history_data, dict) else load_history(_history_file_path())
+    index: dict[str, dict[str, object]] = {}
+    if not isinstance(data, dict):
+        return index
+
+    today = datetime.utcnow().strftime("%Y-%m-%d")
+    for city_name, rows in data.items():
+        if not isinstance(rows, dict):
+            continue
+        settled: list[tuple[str, float, float]] = []
+        for date_key in sorted(rows.keys(), reverse=True):
+            if date_key >= today:
+                continue
+            record = rows.get(date_key) or {}
+            if not isinstance(record, dict):
+                continue
+            actual = _sf(record.get("actual_high"))
+            deb_prediction = _sf(record.get("deb_prediction"))
+            if actual is None or deb_prediction is None:
+                continue
+            settled.append((date_key, actual, deb_prediction))
+            if len(settled) >= max(lookback, 1):
+                break
+
+        hit_count = 0
+        abs_errors: list[float] = []
+        for _, actual, deb_prediction in settled:
+            abs_errors.append(abs(deb_prediction - actual))
+            if apply_city_settlement(city_name, actual) == apply_city_settlement(city_name, deb_prediction):
+                hit_count += 1
+
+        sample_count = len(settled)
+        hit_rate = (hit_count / sample_count) if sample_count > 0 else None
+        if sample_count < min_samples:
+            tier = "other"
+        elif hit_rate is not None and hit_rate >= 0.67:
+            tier = "high"
+        elif hit_rate is not None and hit_rate >= 0.34:
+            tier = "medium"
+        else:
+            tier = "low"
+
+        index[str(city_name).strip().lower()] = {
+            "tier": tier,
+            "sample_count": sample_count,
+            "hit_rate": round(hit_rate, 4) if hit_rate is not None else None,
+            "mae": round(sum(abs_errors) / sample_count, 3) if sample_count > 0 else None,
+            "last_date": settled[0][0] if settled else None,
+        }
+    return index
+
+
 @router.get("/healthz")
 async def healthz():
     payload = build_health_payload()
@@ -199,9 +266,11 @@ async def metrics():
 async def list_cities(request: Request):
     try:
         out = []
+        deb_recent_index = _build_recent_deb_performance_index()
         for name, info in CITIES.items():
             risk = CITY_RISK_PROFILES.get(name, {})
             city_meta = CITY_REGISTRY.get(name, {}) or {}
+            deb_recent = deb_recent_index.get(name, {})
             settlement_source = str(info.get("settlement_source") or "metar").strip().lower() or "metar"
             out.append(
                 {
@@ -220,6 +289,11 @@ async def list_cities(request: Request):
                         settlement_source,
                         settlement_source.upper(),
                     ),
+                    "deb_recent_tier": deb_recent.get("tier", "other"),
+                    "deb_recent_hit_rate": deb_recent.get("hit_rate"),
+                    "deb_recent_sample_count": deb_recent.get("sample_count", 0),
+                    "deb_recent_mae": deb_recent.get("mae"),
+                    "deb_recent_last_date": deb_recent.get("last_date"),
                 }
             )
         return {"cities": out}