diff --git a/lib/microwaveprop/workers/propagation_grid_worker.ex b/lib/microwaveprop/workers/propagation_grid_worker.ex
index 593401f4..31c8af6b 100644
--- a/lib/microwaveprop/workers/propagation_grid_worker.ex
+++ b/lib/microwaveprop/workers/propagation_grid_worker.ex
@@ -69,6 +69,13 @@ defmodule Microwaveprop.Workers.PropagationGridWorker do
          end) do
       {:ok, grid_data} ->
         store_hrrr_profiles(grid_data, valid_time)
+
+        Phoenix.PubSub.broadcast(
+          Microwaveprop.PubSub,
+          "weather:updated",
+          {:weather_updated, valid_time}
+        )
+
         scores = compute_scores(grid_data, valid_time)
 
         case Propagation.upsert_scores(scores, prune: false) do