I'd justlook at the snow precip totals. There will be a precipitous gradient.. Or go back to NWS historical data for specific points, connect the dots
http://www.weather.gov/images/nerfc/ops/sf1_today.jpg
grab it today before it is updated.
or
http://tinyurl.com/hjy7bm2
or
https://www.ncdc.noaa.gov/snow-and-ice/