The National Weather Service has posted a Winter Weather Advisory for Baltimore, Washington, and Annapolis effective 1 a.m. Monday through 10 a.m. Tuesday for 3 to 5 inches of snow and sleet, as well as a period of freezing rain. Low pressure developing in the southern states will send warmer air northward and toward the Middle Atlantic states on Monday. This will cause “overrunning” precipitation to develop by late Monday morning. With dense, cold air at the surface, this will cause widespread snowfall over central Maryland during the day on Monday. Eventually, the warm flow of air will cause snow to change to sleet, freezing rain, and then all rain by Monday evening and Tuesday. In fact, surface temperatures will rise from the lower 20s on Monday morning to the upper 40s by Tuesday afternoon. Before the change to rain, snow may accumulate 1 to 3 inches in Baltimore, Annapolis, and Washington by Monday evening. Roads may become snow-covered and icy during this period. A couple of hours of sleet and freezing rain after the snow may make travel even more treacherous before the arrival of warmer temperatures and rain. By Tuesday morning, a cold rain will be falling over the area with temperatures rising through the 30 and into the 40s. Flooding may be a problem in some areas as moderate rainfall and warmer temperatures result in a rapid melting of snow.
Here is the timeline of the winter storm that will impact central Maryland on Monday:
- Monday 12 a.m. to 3 a.m.: A chance of light snow, developing from south to north. Temperatures 18 to 21.
- Monday 3 a.m. to 6 a.m.: Widespread light snow, accumulating up to 1″. Temperatures 20 to 25.
- Monday 6 a.m. to Noon: Light to moderate snow, accumulating another 1 to 2″. Temperatures 25 to 30.
- Monday Noon to 3 p.m.: Light to moderate snow, changing to sleet. Temperatures around 30.
- Monday 3 p.m. to 6 p.m.: Sleet and freezing rain. Temperatures around 30.
- Monday 6 p.m. to Midnight: Freezing rain and mist, changing to rain. Temperatures 30 to 35.
- Tuesday 12 a.m. to 6 a.m.: Periods of rain. Temperatures 35 to 40.
- Tuesday 6 a.m. to Noon: Periods of rain. Temperatures 40 to 45.
Here is the exclusive weather forecast for Baltimore, Annapolis, and Washington D.C.:
Sunday Night: Becoming cloudy with a chance of some light snow toward morning. The low will be in the upper 10s to near 20. Monday: Snow with 3-5″ accumulation possible in Baltimore and Washington, D.C. before changing to sleet in the afternoon. The high will be in the lower 30s. Monday Night: Sleet changing to freezing rain and then to rain after midnight. Temperatures will hold in the lower 30s. Tuesday: Periods of rain with a high in the mid 40s. Wednesday: Clouds and sun with a high in the mid 40s. Thursday: Mostly sunny with a high near 40. Friday: Clouds and sun with a high in the mid 40s. Saturday: Mostly sunny and mild with a high in the lower 50s.
- Baltimore average lows and highs
- Washington average lows and highs
- National Weather Service daily weather discussion
- Baltimore/Washington National Weather Service
- Chesapeake Bay marine forecast
- Mid-Atlantic radar loop
- Sunrise and Sunset