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Posted at 07:25 PM ET, 05/19/2011

PM Update: Scattered thundershowers but rain coverage trending downward

Coastal flood warning for D.C. and Alexandria through 2 a.m. Saturday; Flood warning for Potomac River at Point of Rocks (Frederick/Loudoun counties) and Little Falls (Fairfax/Montgomery counties).

10:00 p.m. update: A small line of storms has developed through central Fairfax and Montgomery counties and will move through eastern sections of those counties and then the District and eastern suburbs over next hour. Downpours and lightning likely.

8:00 p.m. update: Severe thunderstorm warning (discussed below) has expired but strong storms continue in northern Montgomery county into Howard county. Those should gradually move off and diminish in next hour. Outside of those areas, most spots are in the clear and additional activity, if any, should be isolated.

7:25 p.m. update: Some thunderstorms are starting to develop around Montgomery county. A severe thunderstorm warning has been issued for the cell on the north side of the county until 8 p.m. and also includes parts of eastern Frederick and western Howard county The main threat with this storm is hail, and it is expected to pass through Damascus, Montgomery Village and Olney. Another smaller thunderstorm is moving through the south side of the county.

6:40 p.m. update: The flash flood watch has been canceled for the metro region. Widely scattered thundershowers are possible this evening, but most spots are looking dry (unless you’re up near Baltimore or south of Fredericksburg). Keep an occasional eye on radar and enjoy your evening!

Overview (From 4:00 p.m.): There is most definitely light at the end of this damp tunnel. Widely scattered thundershowers are around this evening but late tonight into tomorrow, rain chances are on the decline. To close out the work week, we should see some partial sunshine and just a slight chance of showers.


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

Through Tonight: Scattered showers and thunderstorms are around and about, but there’s just about a 30-40 percent chance you get wet from the District and points south. If you live north of the District, I’d place odds of getting wet at about 50/50. After 8 or 9 p.m., everyone sees rain chances diminish, with partly to mostly cloudy skies for the remainder of the night. A little patchy fog is possible by morning. Lows range from the mid-50s in the cooler suburbs to near 60 downtown.

Tomorrow (Friday): We should see a little more sunshine than we’ve seen in recent days, but clouds are still around. Shower chances are low, with the best chance during the afternoon during the evening- but only around 30 percent. Highs reach the mid-70s.

See David Streit’s forecast through early next week. And if you haven’t already, join us on Facebook and follow us on Twitter

Pollen update from Walter Reed: “The last 24 hour count continues to be somewhat incomplete due to heavy rain showers. Trees are MODERATE at 19.81 gr/cubic meter, grasses are 6.07 gr/cubic meter which is MODERATE (NAB range) and in the High range for this area. Weeds are LOW at 0.32 gr/cubic meter and mold spores are in the HIGH range at 23938.51 spores/cubic meter.”

Weather Gang Lab: In my live video earlier today, I discussed the weather pattern and the hurricane season outlooks.

Tornadoes seen on Eastern shore: Across the Chesapeake, tornadoes have been spotted each of the last two days. WJLA reported a tornado was sighted (imagery) in Worton, Md. in Queen Anne’s county midday (today). Tony Pann’s blog out of Baltimore has some more photos and video. Yesterday, a small twister was photographed near Cambridge.

By  |  07:25 PM ET, 05/19/2011

Categories:  Forecasts

 
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