From the ABC 7 Weather team

Wintry mix for Friday morning commute?

January 9, 2014 - 05:20 PM
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A light wintry mix could make for a slow-go during the Friday AM rush.

What a week it's been between the record cold temperatures Tuesday, associated with the Polar Vortex, to the possibility of a wintry mix Friday. At least temperatures have been on the upswing.

This next disturbance will move into the region overnight Thursday and early Friday morning. Temperatures will be right around freezing, so freezing rain and snow are possible. Unfortunately, the timing will coincide with the morning rush. This morning, wintry precipitation is falling over the south and Midwest.

A Freezing Rain Advisory has been posted for the majority of the D.C. area besides the Southern Maryland counties of Calvert and St. Mary's. The advisory begins at 11pm tonight for zones to the southwest of D.C. and at 3am Friday closer to the D.C. Metro. The advisory runs through 9am Friday.

This moisture will track northeast throughout Thursday. As warmer air moves into the mid and upper levels of the atmosphere, freezing rain will be a concern with surface temperatures at or slightly below freezing. Take a look at our in-house computer simulation of temperatures and precipitation tomorrow morning.

As warmer temperatures work in from the south through the early to mid morning, all precipitation will quickly change to rain. Here's another simulation of precipitation type at 9 and 11 a.m. Friday. In a two-hour span, the precipitation changes to rain. Remember, this is one simulation, so we'll have to watch temperatures closely.
 
Penn State e-wall


Ice accumulations, if any, will be very light. In fact, look at this product from the Weather Prediction Center. This image below shows the probability of ice accumulations of less than 0.01 inches. The D.C. metro has a 5-10 percent probability of a light coating, with higher probabilities farther west.

Weather Prediction Center


As the warm front lifts farther north, and winds shift out of the south, temperatures will climb, believe it or not, into the upper 50s to low 60s by Saturday afternoon! Take a look a the surge of southerly warmth ahead of the next cold front.

College of DuPage

This front will bring another round of wet weather for the day Saturday. The heaviest rain will slide in late Saturday afternoon and will be out of here by Sunday morning. Stay with the StormWatch7 weather team for the latest in winter weather developments.

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