diff --git a/lib/microwaveprop_web/live/contact_live/show.ex b/lib/microwaveprop_web/live/contact_live/show.ex
index 4b30a26a..ad373ef0 100644
--- a/lib/microwaveprop_web/live/contact_live/show.ex
+++ b/lib/microwaveprop_web/live/contact_live/show.ex
@@ -225,10 +225,13 @@ defmodule MicrowavepropWeb.ContactLive.Show do
           <% end %>
         </:subtitle>
         <:actions>
-          <button phx-click="toggle_flag" class={[
-            "btn btn-sm",
-            if(@contact.flagged_invalid, do: "btn-warning", else: "btn-ghost")
-          ]}>
+          <button
+            phx-click="toggle_flag"
+            class={[
+              "btn btn-sm",
+              if(@contact.flagged_invalid, do: "btn-warning", else: "btn-ghost")
+            ]}
+          >
             <.icon name="hero-flag" class="w-4 h-4" />
             {if @contact.flagged_invalid, do: "Unflag", else: "Flag as Invalid"}
           </button>
@@ -257,9 +260,9 @@ defmodule MicrowavepropWeb.ContactLive.Show do
       <%= if @elevation_profile do %>
         <div class="mb-4">
           <div class="text-sm font-mono mb-2 text-center">
-            {format_band_ghz(@contact.band)} &middot; {@contact.mode}
-            &middot; {format_dist(@elevation_profile.dist_km)}
-            &middot; {@contact.grid1 || "—"} &rarr; {@contact.grid2 || "—"}
+            {format_band_ghz(@contact.band)} &middot; {@contact.mode} &middot; {format_dist(
+              @elevation_profile.dist_km
+            )} &middot; {@contact.grid1 || "—"} &rarr; {@contact.grid2 || "—"}
           </div>
           <table class="text-sm font-mono mb-2 mx-auto">
             <tr>
@@ -728,14 +731,10 @@ defmodule MicrowavepropWeb.ContactLive.Show do
   defp extract_ducts(hrrr_path, soundings, surface_elev) do
     hrrr_ducts = extract_hrrr_ducts(hrrr_path, surface_elev)
 
-    if hrrr_ducts != [] do
-      hrrr_ducts
-    else
+    if hrrr_ducts == [] do
       sounding_ducts = extract_sounding_ducts(soundings, surface_elev)
 
-      if sounding_ducts != [] do
-        sounding_ducts
-      else
+      if sounding_ducts == [] do
         # Use the profile with the strongest (most negative) gradient
         best =
           hrrr_path
@@ -743,7 +742,11 @@ defmodule MicrowavepropWeb.ContactLive.Show do
           |> Enum.min_by(& &1.min_refractivity_gradient, fn -> nil end)
 
         infer_duct_from_gradient(best, surface_elev)
+      else
+        sounding_ducts
       end
+    else
+      hrrr_ducts
     end
   end
 
@@ -1015,9 +1018,15 @@ defmodule MicrowavepropWeb.ContactLive.Show do
     verdict = (elevation_profile && elevation_profile.verdict) || (terrain && terrain.verdict)
 
     case verdict do
-      "CLEAR" -> "Line of sight is clear between stations."
-      "FRESNEL_MINOR" -> "Line of sight is clear but with minor Fresnel zone encroachment."
-      "FRESNEL_PARTIAL" -> "Line of sight has partial Fresnel zone obstruction."
+      "CLEAR" ->
+        "Line of sight is clear between stations."
+
+      "FRESNEL_MINOR" ->
+        "Line of sight is clear but with minor Fresnel zone encroachment."
+
+      "FRESNEL_PARTIAL" ->
+        "Line of sight has partial Fresnel zone obstruction."
+
       "BLOCKED" ->
         obs_dist = elevation_profile && elevation_profile.first_obstruction_km
 
@@ -1027,17 +1036,21 @@ defmodule MicrowavepropWeb.ContactLive.Show do
           "Path is terrain-obstructed."
         end
 
-      _ -> nil
+      _ ->
+        nil
     end
   end
 
   defp propagation_mechanism(terrain, elevation_profile, hrrr, soundings, dist_km) do
     blocked? = terrain && terrain.verdict == "BLOCKED"
     ducting? = has_ducting?(hrrr, soundings)
-    enhanced_refraction? = hrrr != nil && is_number(hrrr.min_refractivity_gradient) && hrrr.min_refractivity_gradient < -100
+
+    enhanced_refraction? =
+      hrrr != nil && is_number(hrrr.min_refractivity_gradient) && hrrr.min_refractivity_gradient < -100
+
     long_path? = dist_km && dist_km > 100
 
-    ducts = elevation_profile && elevation_profile.ducts || []
+    ducts = (elevation_profile && elevation_profile.ducts) || []
     likely_duct = Enum.find(ducts, & &1[:likely])
 
     cond do
@@ -1049,10 +1062,12 @@ defmodule MicrowavepropWeb.ContactLive.Show do
 
       blocked? && enhanced_refraction? ->
         grad = round(hrrr.min_refractivity_gradient)
+
         "Enhanced refraction (dN/dh = #{grad} N-units/km) likely bent the signal over the obstruction. Conditions are super-refractive but below full ducting threshold."
 
       blocked? ->
         diff_db = terrain && terrain.diffraction_db
+
         if diff_db && diff_db > 0 do
           "Path is obstructed with #{:erlang.float_to_binary(diff_db, decimals: 1)} dB diffraction loss. Contact may have been enabled by knife-edge diffraction or tropospheric scatter."
         else
@@ -1076,11 +1091,14 @@ defmodule MicrowavepropWeb.ContactLive.Show do
   defp duct_description(%{source: source, base_m_msl: base, top_m_msl: top, strength: strength}) do
     base_ft = round(base * 3.28084)
     top_ft = round(top * 3.28084)
-    src = case source do
-      "sounding" -> "sounding-detected"
-      "inferred" -> "estimated"
-      _ -> "detected"
-    end
+
+    src =
+      case source do
+        "sounding" -> "sounding-detected"
+        "inferred" -> "estimated"
+        _ -> "detected"
+      end
+
     "#{src} layer at #{base_ft}-#{top_ft} ft, #{strength} M-units"
   end
 
@@ -1095,16 +1113,12 @@ defmodule MicrowavepropWeb.ContactLive.Show do
   defp band_summary(band_mhz, hrrr) when band_mhz <= 12_000 do
     if hrrr && is_number(hrrr.pwat_mm) && hrrr.pwat_mm > 20 do
       "At 10 GHz, the elevated moisture (PWAT #{:erlang.float_to_binary(hrrr.pwat_mm, decimals: 1)} mm) enhances refractivity and ducting potential."
-    else
-      nil
     end
   end
 
   defp band_summary(band_mhz, hrrr) when band_mhz >= 24_000 do
     if hrrr && is_number(hrrr.pwat_mm) && hrrr.pwat_mm > 25 do
       "At #{round(band_mhz / 1000)} GHz, high moisture (PWAT #{:erlang.float_to_binary(hrrr.pwat_mm, decimals: 1)} mm) causes significant water vapor absorption."
-    else
-      nil
     end
   end
 
@@ -1116,12 +1130,15 @@ defmodule MicrowavepropWeb.ContactLive.Show do
     details =
       if hrrr && is_number(hrrr.min_refractivity_gradient) do
         grad = round(hrrr.min_refractivity_gradient)
-        label = cond do
-          grad < -157 -> "ducting"
-          grad < -100 -> "super-refractive"
-          grad < -79 -> "enhanced"
-          true -> "normal"
-        end
+
+        label =
+          cond do
+            grad < -157 -> "ducting"
+            grad < -100 -> "super-refractive"
+            grad < -79 -> "enhanced"
+            true -> "normal"
+          end
+
         details ++ ["Refractivity gradient: #{grad} N-units/km (#{label})."]
       else
         details
@@ -1139,11 +1156,11 @@ defmodule MicrowavepropWeb.ContactLive.Show do
     ducting_soundings = if is_list(soundings), do: Enum.filter(soundings, & &1.ducting_detected), else: []
 
     details =
-      if ducting_soundings != [] do
+      if ducting_soundings == [] do
+        details
+      else
         names = Enum.map_join(ducting_soundings, ", ", fn s -> s.station.name || s.station.station_code end)
         details ++ ["Ducting detected by soundings at: #{names}."]
-      else
-        details
       end
 
     details =
@@ -1174,24 +1191,30 @@ defmodule MicrowavepropWeb.ContactLive.Show do
     solar_hour = ts.hour + ts.minute / 60 + (lon || 0) / 15
     solar_hour = rem_float(solar_hour + 24, 24)
     h = round(solar_hour)
-    label = cond do
-      h >= 4 and h < 8 -> "dawn"
-      h >= 8 and h < 12 -> "morning"
-      h >= 12 and h < 17 -> "afternoon"
-      h >= 17 and h < 21 -> "evening"
-      true -> "night"
-    end
+
+    label =
+      cond do
+        h >= 4 and h < 8 -> "dawn"
+        h >= 8 and h < 12 -> "morning"
+        h >= 12 and h < 17 -> "afternoon"
+        h >= 17 and h < 21 -> "evening"
+        true -> "night"
+      end
+
     "Solar hour ~#{h} (#{label})"
   end
 
   defp td_note(temp_f, dewpoint_f) when is_number(temp_f) and is_number(dewpoint_f) do
     depression = Float.round(temp_f - dewpoint_f, 1)
-    label = cond do
-      depression < 3 -> "near saturation"
-      depression < 8 -> "moist"
-      depression < 15 -> "moderate"
-      true -> "dry"
-    end
+
+    label =
+      cond do
+        depression < 3 -> "near saturation"
+        depression < 8 -> "moist"
+        depression < 15 -> "moderate"
+        true -> "dry"
+      end
+
     "T-Td = #{depression}°F (#{label})"
   end
 
@@ -1201,12 +1224,15 @@ defmodule MicrowavepropWeb.ContactLive.Show do
 
   defp refractivity_note(grad) do
     g = round(grad)
-    label = cond do
-      g < -157 -> "ducting"
-      g < -100 -> "super-refractive"
-      g < -79 -> "enhanced"
-      true -> "normal"
-    end
+
+    label =
+      cond do
+        g < -157 -> "ducting"
+        g < -100 -> "super-refractive"
+        g < -79 -> "enhanced"
+        true -> "normal"
+      end
+
     "dN/dh = #{g} (#{label})"
   end
 
@@ -1224,12 +1250,15 @@ defmodule MicrowavepropWeb.ContactLive.Show do
 
   defp wind_note(kts) do
     k = Float.round(kts, 1)
-    label = cond do
-      k < 5 -> "calm"
-      k < 15 -> "light"
-      k < 25 -> "moderate"
-      true -> "strong"
-    end
+
+    label =
+      cond do
+        k < 5 -> "calm"
+        k < 15 -> "light"
+        k < 25 -> "moderate"
+        true -> "strong"
+      end
+
     "#{k} kts (#{label})"
   end
 
@@ -1246,11 +1275,13 @@ defmodule MicrowavepropWeb.ContactLive.Show do
   defp pressure_note(nil), do: "—"
 
   defp pressure_note(mb) do
-    label = cond do
-      mb < 1005 -> "low"
-      mb < 1015 -> "moderate"
-      true -> "high"
-    end
+    label =
+      cond do
+        mb < 1005 -> "low"
+        mb < 1015 -> "moderate"
+        true -> "high"
+      end
+
     "#{Float.round(mb, 1)} mb (#{label})"
   end