From the ABC 7 Weather team

D.C. Weather Forecast: Gusty and cold through Thursday, Wintry Mix Friday

February 20, 2013 - 03:25 PM
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Colder than average temperatures and gusty winds through tomorrow, but then eyes turn to a possible wintry mix come Friday.

Tonight: Becoming clear and very cold with gusty winds continuing.

Lows: Upper teens to mid 20s, with wind chills in the teens and single digits | Wind: N 10-15 G 20 mph

Thursday: Mostly sunny, but still very breezy and cold.

Highs: Low 40s, but feeling colder with the wind | Wind: N 10-20 G 30 mph

Friday: Cloudy and cold with a chance of rain, sleet, and snow developing during the day.

Highs: Mid to upper 30s | Wind: ESE 5-10 mph

High pressure building into our region is interacting with low pressure over eastern Canada. The atmospheric pressure gradient between the two systems has been driving cold, gusty winds across the area all day. This pattern will continue tonight and tomorrow.  

By early Friday morning though, the high center will move off shore. Winds will shift to a more southeasterly direction. This more, moisture-laden air flow off the ocean will be strengthened by southwesterly winds well ahead of a huge storm system that will be moving across the central U.S. The net effect of these two systems will be the development of light rain, snow, sleet and freezing rain across our region. While specific details are still lacking, we recognize there is a better than 50/50 chance for adverse winter weather to affect some or all of our area on Friday. These conditions could continue through Friday night north and west of Washington. On Saturday, a new area of low pressure is expected to develop and move northward, off shore of the mid-Atlantic coast. Computer simulations have consistently shown it will be warmer on Saturday and we will just have a chilly and rainy day to deal with. Sunshine will return on Sunday.

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