Some accumulation is a good bet and slick roads are possible in some areas
The National Weather Service has expanded the winter weather advisory, previously covering Washington’s far west and northwest suburbs, to include the Interstate 95 corridor and the District. The advisory is in effect from 7 a.m. to 3 p.m. Saturday due to the combination of snow and high winds, gusting up to 45 to 55 mph. The Weather Service is now predicting up to 2 to 4 inches of snow in the advisory area .it expects the steadiest snowfall Saturday morning.
Anywhere from a coating to a few inches could fall across the area through midafternoon, when the snow should taper off. There is the potential for a heavy burst of snow in the morning. While some snow will melt initially due to air and ground temperatures above freezing, we can’t rule out slushy accumulation, even on the roads if it snows hard enough.
Temperatures, in the 40s to near 50 before dawn, will rapidly fall to near freezing during the morning and into the upper 20s in the afternoon. It will also be very windy, with gusts up to 35 to 45 mph, making it feel even colder. While a winter weather advisory is currently only in effect for our far west and northwest suburbs, we wouldn’t be surprised if it’s expanded eastward toward the Interstate 95 corridor.The reason we’ve increased our snowfall predictions compared to previous days is because “models trended east with the storm track allowing cold air to spread over the region more quickly,” said Wes Junker, Capital Weather Gang’s winter weather expert.
Temperatures should fall enough, assuming snow falls steadily, for at least light accumulations, especially in our colder areas north and west of downtown. This will be an elevation-dependent snowfall — meaning amounts should increase as you get into hillier terrain west and northwest of the Beltway.Snow may have a hard time accumulating in areas near the Potomac River, Chesapeake Bay and downtown Washington, where temperatures tend to be mildest.
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