PM Update: Scattered to numerous storms this evening, warm and drier on Thursday


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.

10:35 p.m. update: A severe thunderstorm warning is in effect for eastern Prince George’s County, as well as Anne Arundel and northwest Calvert counties, until 11:15 p.m. These storms have a history of producing frequent lightning and heavy rain, and may now produce damaging winds near or over 60 mph in the warned area. The storms have now cleared D.C./I-95 and points west as they race east through the eastern suburbs toward the Chesapeake Bay.

9:55 p.m. update: That line of showers and thunderstorms has intensified quite a bit as it continues east across D.C./I-95 and now into the eastern suburbs. These storms are strong with very heavy rain and a lot of lightning, but still nothing severe in terms of damaging winds or large hail.

9:10 p.m. update: After weakening on approach, storms have strengthened again as they come through the immediate metro area during the next hour or so. Most spots can expect approximately 20-30 minutes of heavy rain along with lightning and some gusty winds as the storms come through. There are currently no severe warnings in effect.

From 5:30 p.m…. It was a toasty one out there, with highs in the upper 80s to near 90 most spots. Add in fairly brutal humidity levels and perhaps you’re wishing for a cooling shower or storm at this point! Raindrops are moving this way from the west, and should pass through at least parts of the area this evening.

Through Tonight: Scattered to numerous showers and storms are advancing on the area from the west. There’s still some question as to their overall coverage as they pass, but the most likely period is from about 6 p.m. well west to 11 p.m. east. In the immediate D.C. area, the 8-10 p.m. slot may be most favored. While we don’t anticipate widespread severe weather, some isolated wind damage is possible in the worst of storms. Any activity may also contain heavy rainfall capable of brief flash flooding as well as frequent lightning. The cold front responsible is more of a wind shift than anything, so lows are still in the mild mid-60s to near 70 range. Winds become light from the northwest around or after midnight.

Tomorrow (Thursday): As noted, tonight’s cold front doesn’t have a lot of “oomph,” so it will mainly be less humid than today, just not much. Winds from the northwest around 10 mph bring in slightly lower dew points, but it’s also often a warming wind direction in summer. Either way, highs in the mid-80s to near 90 should be less complaint worthy than today. Plentiful sun, too!

See Dan Stillman’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.


Sunset on Tuesday evening. (Dan Lawrence via Flickr)

Pollen update: Mold spores are moderate and all other pollen types are low.

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.
Dan Stillman is a meteorologist and editor for the Capital Weather Gang. He earned an M.S. in Meteorology from Texas A&M University, and a B.S. in Atmospheric, Oceanic and Space Sciences from the University of Michigan.
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