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St. Patrick's Day snow brings 6 to 12 inches to Washington, Baltimore

National Weather Service forecast map
National Weather Service forecast map
Map courtesy National Weather Service

A late-season winter storm is winding down across the Middle Atlantic states after dropping 6 to 12 inches of powder on Washington DC, Baltimore, and Annapolis. Just two days ago, these areas were basking under sunshine and 70 degrees with the promise of spring in the air, but a surge of arctic air set the stage for the development of low pressure to the south and the result was a blanket of snow across Maryland, northern Virginia, southern Pennsylvania, southern New Jersey, and Delaware. The storm brought the seasonal total at Baltimore (BWI) to nearly 40 inches.

Snow flurries began falling on Sunday afternoon with the air temperature near 40 and a dew point temperature in the 20s. However, within a few hours the mercury had dropped into the mid 30s and light snow was picking up across the region. Snow began to accumulate on unpaved surfaces from 8 p.m. to midnight with a couple of inches at most locations. However, as the precipitation intensified and as the temperature dropped into the 20s, snow began covering walkways and roads. Additionally, snowfall rates increased to 1" per hour at times. The heaviest snow fell from midnight through 6 a.m. followed by a few hours of light snow or flurries. Although final totals are still coming in to various NWS outlets, it appears that a general 6 to 12-inch swath of snow fell over the Middle Atlantic states with the heaviest falling over Washington DC and Annapolis MD. Unlike many late-season snowfalls that are heavy and wet, this storm produced a more powdery snow that swirled off rooftops in the gusty wind and sub-freezing temperatures.

The forecast for the rest of the day calls for a mostly cloudy sky with cold temperatures as highs struggle to reach the freezing point. A gusty wind from the northeast will make it feel even colder. The high March sun angle will help to melt snow on the main roads, the fresh covering of late-winter snow will hold on for another day as Tuesday is expected to be another cold day.

Here are some links with additional information on the storm:

Accu-Weather: Snowstorm moves off East Coast

Winter Storm Coverage from The Weather Channel

Late-Season Snow in DC

For more weather updates, please visit my web site, my Chesapeake Bay Weather page on Facebook, and if you're heading to Ocean City feel free to check out my Ocean City MD Weather page on Facebook. You can also follow me on Twitter @chesbayweather.

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