Do you mind sharing where you get the radar image from? I'm trying to do something similar so I can see how I should dress for my bike commute every morning. The only good/free one I have found is NOAA's RIDGE (http://www.srh.noaa.gov/jetstream/doppler/ridge_download.htm...) but it's low resolution and ugly.
https://radar.weather.gov/ridge/Conus/RadarImg/latest.gif