** Winter Weather Advisory Tuesday for snow over entire region **

6:00 p.m. update: Areas of fog are developing across the region as temperatures near the dew point and winds remain light. As a result, the National Weather Service has issued a Dense Fog Advisory for areas north and west of I-95 through 2 a.m. Use caution on roadways as visibility may drop rapidly. In some places any fog may be freezing fog as well, adding to the potential for slick spots.

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Temperature Map

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

From 4:35 p.m.: Today has been a day for melting — or at least a little bit of melting, depending on where you are. Still, those temperatures reaching highs mainly in the mid-and-upper 30s are well below normal. Any peeks of clearer skies will be fleeting as the next in a series of systems approaches the area. Tomorrow’s another mess, especially the first half of the day.

Through Tonight: We may get a window of some clearer skies this evening, particularly western parts of the area where some breaks have already shown up. Otherwise, we stay rather cloudy, and clouds thicken overall. Low temperatures settle into the upper 20s and lower 30s by dawn. Snow begins to move in from the west around 4-7 a.m. and starts sticking right away. Also, watch out for slick spots overnight as any water around is likely to refreeze.

Related: Snow likely Tuesday, could snarl morning rush hour traffic

Tomorrow (Tuesday): Snow, maybe with some mix initially, should spread into the area from the west prior to or right around sunrise, and push east over the subsequent two hours or so. A period of moderate to heavy snow is possible in a window from about 7 a.m through 11 a.m. before things begin to taper. When all is said and done, much of the area should see about 2-5 inches of snow, perhaps a bit more or less in spots. Snowfall rates may exceed 1 inch per hour at times in the heaviest. Temperatures near or below freezing to start the day fall off a bit as snow gets underway, and we likely won’t go far upwards as snow ends. Daytime highs ranging from near freezing to the mid-30s should do it. Winds are from the north around 10 mph.

See Jason Samenow’s forecast through the weekend. And if you haven’t already, join us on Facebook and follow us on Twitter . For related traffic news, check out Dr. Gridlock.

Foliage and snow on Park Road NW in Washington, Dec. 8, 2013. (angela n. via Flickr)

Snow drought update: Including today, it’s been 1,048 days since D.C. officially picked up its last 2 inch snowstorm. Odds appear as good as they’ve been in a long time that we break the streak tomorrow. Of course, many spots surpassed that mark on Mar. 25 of this year, but Reagan National (DCA) came in with only 1.4 inches. Given the 0.6 inches on the books from Sunday’s snow, DCA needs to pick up more than 2.5 inches to best last winter’s snow total and 1.4 inches to surpass the total from the 2011-12 winter. All this possible before astronomical winter even begins?! Things are looking UP for snow lovers!