The National Weather Service has issued a winter storm warning for Washington, D.C. and locations to the west and north, for the likelihood of at least 4 to 8 inches of snow between midnight tonight and 3 a.m. Thursday morning.

Link: Hundreds of flights canceled as snowstorm looms

East of the city, including Prince George’s, Anne Arundel and Charles counties, a winter weather advisory is in effect for 2 to 4 inches of snow Wednesday afternoon after a period of rain or mixed precipitation.

Southern Maryland is not included in any advisory or warning, as mostly rain is expected.

The warning, covering areas right along and west of I-95, is an expansion of a warning that covered areas further west issued early this morning. In those locations farther to the west, including Loudoun, Fauquier and Frederick counties, 8 to 14 inches of snow is forecast by the NWS.

National Weather Service snow accumulation forecast

The NWS forecast is more or less consistent with our forecast, which indicates:

* 3-8 inches for the immediate D.C. area and locations just to the east, including areas inside the beltway

*6-12 inches from central Fairfax and Montgomery counties to near Leesburg and Frederick

* 10-15 inches or more around Winchester

*1-4 inches in southern Maryland

Capital Weather Gang accumulation forecast

For additional information on the storm, including a timeline, projected effects on travel and schools, and answers to frequently asked question, please see this post: High-impact, heavy snowstorm to hammer Washington area tonight and Wednesday