screen/weather: Show snow status as bg color

screen/weather

@@ -29,11 +29,7 @@ export -n HTTP_PROXY http_proxy
 # fall back to realtime weather data if no cache is available
 wdata=/tmp/.weather
 data="$(
-  if [ -s "$wdata" ]; then
-    cat /tmp/.weather
-  else
-    weather -i "${WEATHER_METAR:-kbuf}"
-  fi \
+  cat /tmp/.weather 2>/dev/null \
     | sed 's/^ \+//g'
 )"
 
@@ -48,6 +44,12 @@ weather_c="$( echo "$weather_temp" \
   | grep -oP '[0-9\.-]+ C' \
   | cut -d' ' -f1 \
 )"
+# filters out e.g. "N inches of snow on ground"
+weather_type="$( echo "$data" \
+  | grep '^Weather: ' \
+  | grep -v ' on ground' \
+  | cut -d' ' -f2- \
+)"
 wind="$( grep -o '[0-9]\+ MPH' <<< "$data" \
   | tr '\n' '-' \
   | sed 's/-$//;s/ \?MPH-/-/' \
@@ -70,10 +72,15 @@ else
     color=m # purple with my color scheme
 fi
 
+bgcolor='.'
+if [[ "$weather_type" =~ snow ]]; then
+  bgcolor=w
+fi
+
 # if it's sunny, make the status brighter
 echo "$data" | grep -qP 'sunny|(mostly )?clear|partly cloudy' && {
     color=$( echo $color | tr '[:lower:]' '[:upper:]' )
 }
 
-echo -e "\005{+ .$color}${weather_f}F/${weather_c}C $wind\005{-}"
+echo -e "\005{+ $bgcolor$color}${weather_f}F/${weather_c}C $wind\005{-}"