From the ABC 7 Weather team

More winter precipitation heading to D.C. Tuesday

December 9, 2013 - 11:37 AM
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A Winter Storm Watch is in effect for the majority of the D.C. area from late tonight through Tuesday afternoon.

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As one winter storm exits, another is forecast to enter by early Tuesday morning, making for the possibility of more delays, cancellations and additional travel complications.

A Winter Storm Watch is in effect everywhere besides Southern Maryland as well as Stafford and Spotsylvania Counties in Virginia.

Areas to the southeast are expected to mix in a bit more of the way of rain and sleet so accumulations will be limited in those locations, thus not hitting the 5" or greater Winter Storm Watch criteria.

At this point, our team is thinking a more general 2" to 5" will be possible tomorrow, with the highest amounts just to the west of D.C. where snow should be the primary precipitation type with colder air available.

I like the graphic from the National Weather Service below showing the probability of greater than 4" of snow in a given area. For the D.C. Metro it only stands at 40-50%.

Timing

At this point it appears that snow will begin in the morning hours during the rush hour and continue through the early afternoon. Precipitation may start as a mix in the D.C. Metro and points east but should change over to snow the rest of the day. This will of course create more travel headaches, and delays and cancellations will be likely.

Other thoughts

The National Weather Service is discussing the potential for a banding feature to set up somewhere just west of the D.C. area that could bring the potential for heavier snow in isolated locations. At this point, I think it's a little difficult to say exactly if this feature will happen or where exactly it will be.

Heavy snow band northwest of D.C. Sunday

We saw the same kind of feature yesterday north and west of D.C. where very heavy snow fell from Winchester north to Hagerstown and east to north of Baltimore. We'll be monitoring radar trends tomorrow to try and stay on top of it. With that being said, there's an outlying chance of some locations seeing 5" or more.

Another note is most of the roadways are wet right now and will continue to be wet through tomorrow morning.

Area roadways are currently above freezing and should be tomorrow morning, leading to the majority of snow in the morning to melt on contact. Snow will need to become moderate or heavy to overcome the warm roads in order to pile up.

Snowfall totals may be reached but you might not notice it if the roads aren't as bad!

We'll of course be on air and online all day so tune in tonight at 5, 6 and 11 p.m. and tomorrow starting at 4 a.m. (if you happen to be up that early!) to see if there are any changes to the forecast!

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