diff --git a/lib/microwaveprop_web/live/contact_live/show.ex b/lib/microwaveprop_web/live/contact_live/show.ex
index 27342a72..24ac0085 100644
--- a/lib/microwaveprop_web/live/contact_live/show.ex
+++ b/lib/microwaveprop_web/live/contact_live/show.ex
@@ -164,21 +164,17 @@ defmodule MicrowavepropWeb.ContactLive.Show do
     hrrr_path = Weather.hrrr_profiles_for_path(contact)
     hrrr = List.first(hrrr_path)
     terrain = socket.assigns.terrain
-    elevation_profile = socket.assigns.elevation_profile
 
-    # Recompute propagation analysis with new sounding data (duct detection)
-    propagation_analysis =
-      if elevation_profile || hrrr do
-        build_propagation_analysis(contact, hrrr, terrain, elevation_profile, soundings)
-      else
-        socket.assigns.propagation_analysis
-      end
+    # Recompute elevation profile with new sounding duct data
+    elevation_profile = compute_elevation_profile(contact, hrrr_path, soundings)
+    propagation_analysis = build_propagation_analysis(contact, hrrr, terrain, elevation_profile, soundings)
 
     {:noreply,
      assign(socket,
        surface_observations: weather.surface_observations,
        soundings: soundings,
        weather_status: :loaded,
+       elevation_profile: elevation_profile,
        propagation_analysis: propagation_analysis
      )}
   end