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A strong winter storm is still expected to hit the D.C. area beginning tonight and ending late Thursday afternoon. Multiple inches of snow are possible and delays and cancellations are already ongoing. Expect conditions to deteriorate once snow begins after sunset, as temperatures will remain below freezing today and snow should accumulate rather quickly.Current thinking on snow totals
Above is our current snow map, with higher forecast snowfall totals west of D.C. and less east. Current thinking is that snow will begin after sunset and continue through the early morning hours. Multiple inches of accumulation will be likely overnight into the morning before a changeover occurs starting in the eastern portions of the viewing area.
Our latest Microcast (NAM based) model coming more inline with RPM with a mix in the metro tomorrow morning! pic.twitter.com/y4b8O5QaMvBrian van de Graaff (@ABC7Brian) February 12, 2014
Remember, Calvert and St. Mary's Counties are only under a Winter Weather Advisory, as accumulations there shouldn't be as high, thus not under warning criteria. Areas to the east may see a change to a wintry mix and rain close to 5am or 6am Thursday. This transition zone is expected to creep closer to the D.C. Metro later in the morning, probably closer to 9am for D.C. itself.
Higher totals are likely just to the west of D.C. as the transition zone isn't expected to reach that far west. Areas such as western Fairfax, the majority of Montgomery and points west should stay as all snow, allowing for higher accumulations.
A foot is possible in locations west with locally higher amounts possible along the Blue Ridge in the higher elevations. The 6" low range may even be a touch low for areas west of D.C., but we will update the map accordingly for ABC 7 News at 5pm. NWS Baltimore/Washington is calling for a foot of snow through the majority of the Piedmont and Blue Ridge.
Snow, sleet and rain will continue to be possible Thursday afternoon and will end by Thursday evening. Friday will see the return of sunshine and milder temperatures in the low 40s.
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