In addition to the rain, fog is also developing. As of 9:45PM, the most widespread dense fog with visibility less than 1/4 mile extends from central Virginia to southern Maryland. Fog may expand further overnight.
Use low beam headlights and allow extra following distance. pic.twitter.com/PxPh06eUhN
— NWS Baltimore-Washington (@NWS_BaltWash) March 1, 2021
from Twitter https://twitter.com/midatlanticwx