add ability to list MSDs by date

README.md

@@ -17,7 +17,10 @@ The maps only include the contiguous United States.
 - fire, fire2, fire3: Fire Weather forecasts
 - msd: Mesoscale Discussions: Overview of current active storms. Use
   `spcget msd <map number>` for a detailed map of one area.
-- msdlist: Lists the numbers for active MSD maps issued currently.
+- msdlist: Lists the numbers for active MSD maps issued currently. Use
+  `spcget msdlist today` to see all issued MSDs for today, including
+  expired ones. Use `spcget msdlist 20200101` to see MSDs from
+  2020-01-01
 - tstm, tstm2, tstm3, tstm4, tstmnow: Severe Thunderstorm forecasts
 - watch: NOAA's current severe thunderstorm and tornado watches
 - warnings: current National Weather Service advisories, watches and warnings

spcget

@@ -21,7 +21,10 @@ msd <map number> - Mesoscale Discussions:
     in progress with more detailed information on those maps. Add the map
     number to see a detailed map for a given area.
 
-msdlist - List of currently issued MSDs.
+msdlist <Ymd> or <today> - List of currently issued MSDs.
+    Use spcget msdlist today to see all issued MSDs from today, including expired ones.
+    Use spcget msdlist <date> to see all issued MSDs for any day.
+    Ex: spcget msdlist 20200101 to see the MSDs issued on 2020-01-01.
     
 tstm, tstm2, tstm3, tstm4 - Thunderstorm Outlooks:
     Chance for thunderstorms on a 6 point scale on days 1, 2, 3 and 4-8.
@@ -54,12 +57,28 @@ case "$1" in
             echo "For more detailed info, look up the specific map with spcget msd <map number>"
         fi
         ;;
-    # get list of currently issued mesoscale discussions
+    # get list of currently issued mesoscale discussions, or by date
     msdlist)
-        echo "Current Mesoscale Discussion Maps"
-        curl -s "https://www.spc.noaa.gov/products/md/"\
-        | grep -oh "\w*md\w*.html" | sed 's/md//g ;; s/.html//g' | uniq -u
-        exit 0
+        if [ ! -z "$2" ]; then
+            case "$2" in
+                today)
+                    DATE=`date "+%Y%m%d"`
+                    curl -s "https://www.spc.noaa.gov/cgi-bin-spc/getmd.pl?target=$DATE"\
+                    | grep -oh "\w*md\w*.html" | sed 's/md//g ;; s/.html//g' | uniq
+                    exit 0
+                    ;;
+                *)
+                    curl -s "https://www.spc.noaa.gov/cgi-bin-spc/getmd.pl?target=$2"\
+                    | grep -oh "\w*md\w*.html" | sed 's/md//g ;; s/.html//g' | uniq 
+                    exit 0
+                    ;;
+            esac
+        else
+            echo "Current Mesoscale Discussion Maps"
+            curl -s "https://www.spc.noaa.gov/products/md/"\
+            | grep -oh "\w*md\w*.html" | sed 's/md//g ;; s/.html//g' | uniq -u
+            exit 0
+        fi
         ;;
     # thunderstorm outlooks, day 1, 2, 3, 4-8
     tstm) GETURL="https://www.spc.noaa.gov/products/outlook/day1otlk.gif";;