Highly Uncertain Forecast South and East of DC

It is premature to post a snow map until Sunday morning in the Washington Region as until the exact track is pinned down we have precipitation type issues (where does the rain/snow line set up) during the event.

For those of you north and west of Washington and Baltimore the latest forecast modeling is still showing a significant snow storm. For those of you south and east, this could still wind up being a significant storm. 

The latest European operational model from overnight brings the “540 line” right into the District, meaning if this latest operational is correct (I will remind you that many of the ensembles keep the “540 line” south and east of Washington) the northern and western suburbs receive the heaviest snowfall accumulations while areas south and east get slop (wet snow) going over to a mix and ending as light snow.

Latest 00z operational European model showing 2am Tuesday (Monday night):

  • Notice the 540 line (blue line labeled 540)… that is the “rain/snow” line.

Latest 00z operational European model showing 8am Tuesday:

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