PM Update: Storms this evening, then much drier, cooler air infiltrates D.C. region

8:45 p.m. update: The severe thunderstorm watch has been lifted, but widespread rain and downpours linger especially along and east of I-95. The front is slowly pushing through the region, but it may take until 10-11 p.m. for this overachieving plume of rain and storms to exit the region. Rain totals are mounting west of the District with widespread 1-2+” totals from Wheaton to Reston back south to around Dale City.

5:45 p.m. update: Showers and storms to our west have become a bit more numerous and have a good chance to produce a period of gusty downpours as they push to the east along the I-66 and Rt. 50 corridor. They’re about 45 minutes from Fairfax and a little over an hour from the District. A severe thunderstorm watch remains in effect east of Fauquier County, but storms should mostly remain sub-severe.


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.

Original post

The polar front finally arrives tonight, putting a long-awaited end to the horrific humidity of recent days. One more broken line of showers and storms may come through early this evening, but by later tonight and Wednesday the weather becomes absolutely breathtaking.

Through Tonight: A relatively benign and broken line of showers (and perhaps the rumble of thunder) should pass through the region between around 5-8 p.m. from west to east (you have a 40 percent chance of getting wet). Then, clouds slowly decrease and drier air arrives with the big push probably not until midnight or so. Overnight lows range from near 60 in the cooler suburbs to the mid-to-upper 60s downtown. Winds become out of the northwest at around 5-10 mph.

Tomorrow (Wednesday): A truly delightful day. Skies are mostly sunny and humidity decreases as the day wears on. Highs range from the upper 70s in our cooler suburbs to the northwest, to the low 80s in most other spots. Winds are from the northwest at 10-15 mph.

See Matt Rogers’ 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.

Pollen: Tree/grass/weed counts are LOW, but mold spore counts are HIGH from the recent rain/humidity.

Stormy skies over D.C. this afternoon (James Gallagher via Twitter)

Stormy skies over D.C. this afternoon (James Gallagher via Twitter)

View from the Hart Senate Building at 2:25 p.m. (Marissa Emanuel)

View from the Hart Senate Building at 2:25 p.m. (Marissa Emanuel)

Cool timelapse of storm: Watch the storm blast through Fairfax earlier by Blaine Korcel…

Also on Capital Weather Gang

Storms have moved out of D.C. metro; Low chance of more later this evening