diff --git a/lib/microwaveprop_web/live/weather_map_live.ex b/lib/microwaveprop_web/live/weather_map_live.ex
index 09084b28..671a90eb 100644
--- a/lib/microwaveprop_web/live/weather_map_live.ex
+++ b/lib/microwaveprop_web/live/weather_map_live.ex
@@ -6,6 +6,8 @@ defmodule MicrowavepropWeb.WeatherMapLive do
   alias Microwaveprop.Weather.MapLayers
   alias MicrowavepropWeb.WeatherMapComponent
 
+  require Logger
+
   @layers MapLayers.all()
   @default_layer MapLayers.default_id()
 
@@ -41,9 +43,14 @@ defmodule MicrowavepropWeb.WeatherMapLive do
     # the LiveView socket join timeout. The client now paints weather
     # through a tile endpoint, so mount only needs the selected layer
     # and valid_time metadata.
-    valid_times = recent_valid_times(Weather.available_weather_valid_times())
+    all_vts = Weather.available_weather_valid_times()
+    valid_times = recent_valid_times(all_vts)
     initial_vt = pick_initial_valid_time(valid_times)
 
+    Logger.info(
+      "WeatherMapLive.mount: all_vts=#{length(all_vts)} recent_vts=#{length(valid_times)} initial_vt=#{inspect(initial_vt)}"
+    )
+
     {lat, lon, zoom} = parse_viewport_params(params)
 
     {:ok,