Update: Light snow and snow to rain event on track for near-dawn arrival

* Winter weather advisory 3 a.m. to 6 p.m. Saturday for Loudoun, northern Fauquier, Montgomery, Howard, and Frederick counties and north and west for 1-3 inches of snow *

Radar over the Eastern United States shows rain and snow moving toward the East Coast at 8:30 p.m. Dec. 28, 2012. View a live (large!) radar loop.

The main area of precipitation is still on track to make its push into the area between about 4 and 8 a.m. — quickest west and south, slowest northeast. There may be a few light snow showers or flurries in the post-midnight hours, but any of this activity appears to be uneventful.

Temperatures: Latest D.C. area temperature map. See interactive map on our Weather Wall.

Temperatures this evening have fallen back into a range from the low-to-upper 30s. The drop has been occurring slowly in much of the region thanks to thickening cloud cover. Readings may remain fairly steady at times overnight, though they should drop a little more from where they are now, and as the initial precipitation arrives.

Overall, the situation remains more or less as it was earlier. Transition to rain will be quickest to the south and east of I-95, with our northern and western suburbs perhaps staying all snow. Your temperature near the start may tell the tale of the storm as there shouldn’t be much upward momentum until precipitation begins to wind down.

Though it starts earlier, the heaviest activity appears to come after sunrise, possibly centered somewhere in the 8 a.m. to 12 p.m. period. However, if there’s been any “trend” on some models since earlier, it’s to cut down precipitation a little. Given the look of radar, it’s premature to buy into that idea fully at this point though. Either way, precipitation tapers off heading through the afternoon, as highs range from about 33-39.

Ian Livingston is a forecaster/photographer and information lead for the Capital Weather Gang. By day, Ian is a defense and national security researcher at a D.C. think tank.


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