diff --git a/src/data_collection/amos_station_sources.py b/src/data_collection/amos_station_sources.py
index b2b6d3bc..b4862793 100644
--- a/src/data_collection/amos_station_sources.py
+++ b/src/data_collection/amos_station_sources.py
@@ -384,12 +384,13 @@ class AmosStationSourceMixin:
                     return None
 
                 if text and re.search(rf"\({icao}\)|\b(?:METAR|TAF)\s+{icao}\b", text, re.I):
+                    logger.info("AMOS page matched icao={} length={}", icao, len(text))
                     record_source_call("amos", "page", "success", (time.perf_counter() - started) * 1000.0)
                     return text
-            logger.debug("AMOS page did not expose requested airport {}", icao)
+            logger.warning("AMOS page did not expose requested airport {} (tried {} urls)", icao, len(urls))
             return None
         except Exception as exc:
-            logger.debug("AMOS page fetch failed icao={}: {}", icao, exc)
+            logger.warning("AMOS page fetch failed icao={}: {}", icao, exc)
             record_source_call("amos", "page", "error", (time.perf_counter() - started) * 1000.0)
             return None
 
@@ -419,8 +420,11 @@ class AmosStationSourceMixin:
         try:
             html = self._amos_get_page(icao)
             if not html:
+                logger.warning("AMOS fetch_amos_official_current: no HTML for {}", icao)
                 return None
 
+            logger.info("AMOS fetch_amos_official_current: got HTML for {} ({} chars), parsing METAR/runway", icao, len(html))
+
             # Parse METAR line
             icao_pattern = re.escape(icao)
             metar_match = re.search(rf"METAR\s+{icao_pattern}\s.*?=", html, re.DOTALL)
diff --git a/src/data_collection/weather_sources.py b/src/data_collection/weather_sources.py
index c412435e..81341e7a 100644
--- a/src/data_collection/weather_sources.py
+++ b/src/data_collection/weather_sources.py
@@ -879,13 +879,19 @@ class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSour
         if city_lower not in ("seoul", "busan"):
             return
         try:
+            logger.info("AMOS: fetching for city={}", city_lower)
             amos_data = self.fetch_amos_official_current(
                 city_lower, use_fahrenheit=use_fahrenheit
             )
             if amos_data:
+                logger.info("AMOS: got data for city={} temp_c={} source={} runway_pairs={}",
+                            city_lower, amos_data.get("temp_c"), amos_data.get("temp_source"),
+                            len(amos_data.get("runway_obs", {}).get("runway_pairs", []) or []))
                 results["amos"] = amos_data
+            else:
+                logger.warning("AMOS: no data returned for city={}", city_lower)
         except Exception as exc:
-            logger.debug("AMOS attach failed city={}: {}", city_lower, exc)
+            logger.warning("AMOS attach failed city={}: {}", city_lower, exc)
 
     def _attach_russia_official_nearby(
         self, results: Dict, city_lower: str, use_fahrenheit: bool
diff --git a/web/analysis_service.py b/web/analysis_service.py
index 0d48af17..3a71cef8 100644
--- a/web/analysis_service.py
+++ b/web/analysis_service.py
@@ -1733,6 +1733,9 @@ def _analyze(
     mg_cur = mgm.get("current", {}) if mgm else {}
     sc_cur = settlement_current.get("current", {}) if settlement_current else {}
     amos_data = raw.get("amos") or {}
+    if amos_data:
+        logger.info("AMOS _analyze: found amos data for city={} temp_c={} source={}",
+                    city, amos_data.get("temp_c"), amos_data.get("source"))
     use_settlement_current = settlement_source in {"hko", "cwa", "noaa", "wunderground"} and bool(sc_cur)
     live_mc = mc if metar_current_is_today else {}
     primary_current = sc_cur if use_settlement_current else live_mc