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PM Update: Precipitation ends this evening, some slick spots possible into morning

Radar & lightning:Latest regional radar shows movement of precipitation and lightning strikes over past 2 hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Today’s big story is of course the snow, but afternoon temperatures struggling to reach 40 are quite impressive as well. If National Airport stays in the 30s for a high (it may touch 40+ but hasn’t yet in hourly obs), it would be only the 6th time since the mid-1940s on this date or later. So, we’re in pretty unusual territory even if it ticks up. Those cold temperatures might help create a few travel hazards as they dip below freezing tonight.

Through Tonight: Light precipitation may linger into the evening, and there could be some embedded heavier bands still for a while. By about 9 p.m. to midnight we should see things end if not prior. Anything that falls tends to not amount to much and/or is wetter than white, though a few spots could pick up another dusting or so if a band moves by and as cooling temperatures support a possible area-wide changeover back to snow. Otherwise, it’s cold and cloudy with lows ranging from the upper 20s to low-or-mid 30s. Some slick spots may develop overnight.

Tomorrow (Tuesday): If you’re out early, be cautious as there may be lingering slick spots before the sun rises high enough to melt any ice (somewhere around 8 a.m.). We may see some breaks of sun here and there, but cold air aloft should promote more cloudiness, so any sun is likely limited. We could even see a light sprinkle or snow shower pass by in the afternoon. Highs make the mid-to-upper 40s. Breezes are from the northwest around 10 to 15 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.

Snow: Today’s preliminary snow total of 3.2″ at Dulles will set a new record for the date (previously 1.2″ in 1990). The 3.2″ at Baltimore (measured at BWI) also breaks their record for the date, set back in 1933 with 2.5″. It appears D.C. (officially) will fall just short of the 1.5″ recorded in 1906 with 1.3″ on the books there. But all is not lost at DCA, as the high should fall right around the average low of 40!

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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Jason Samenow · March 25, 2013

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