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Posted at 04:09 PM ET, 07/19/2012

PM Update: Showers and storms likely tonight and Friday

10:30 p.m. update: Severe thunderstorm warnings have expired but strong storms continue rumbling through the area. They’re currently crossing I-95 (north of Alexandria) and should reach the Bay between 11 and midnight. While there have been some gusty winds, the main feature of these storms have been heavy rain (0.5-1”, isolated 1-2” amounts in Frederick co) and lightning. A flash flooding warning has been issued for the District, southeast Montgomery, central Prince George’s county, east Arlington and northeast Alexandria til 1:30 a.m. Low lying areas prone to flooding may be vulnerable due to heavy rain which has fallen and the possibility of up to 1” of additional rain. Follow our Twitter feed for the latest updates.

9:40 p.m. update: A severe thunderstorm warning is in effect for more or less the entire D.C. metro region through 10:15 p.m. Some isolated damaging wind gusts are possible as these storms come through, but watch out for a LOT of lightning and very heavy rain.

9 p.m. update: Strong line of storms to move through entire metro region over next two hours. Heavy rain, strong winds (40 to 50 mph) and dangerous lightning are likely with these storms. They are moving through Leesburg and into western Montgomery county now and should reach the District just after 10 p.m. and near Annapolis and the Bay just after 11 p.m.

Initial post: A slow,.and I mean slow moving front will sink south through the region between now and Saturday, bringing waves of showers and storms through the region. Persistent cloud cover means the probable end of 90-degree temperatures but plenty of humidity lingers.

Through Tonight: There’s a slight (30 percent) chance of scattered showers and storms through 8 p.m., then a better (60 percent) chance between 8 p.m. and 1 a.m. as an area of rain to the west crosses the mountains. The rain could be locally heavy, but steady, meaningful rain is not a guarantee for everyone as the complex may break-up a bit. It’s quite mild overnight with lows from the low 70s in the cooler suburbs to mid-to-upper 70s downtown.

Friday: Showers and thunderstorms are likely (80 percent chance) - and may be locally heavy, especially in the afternoon. Isolated flooding cannot be ruled out. While we have considerable cloud cover, highs reach the mid-to-upper 80s thanks to flow from the south. Yes, humidity levels remain high for another day.

See David Streit’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.

Disappointed kids (rightly so): In all of their wisdom, Fairfax county officials canceled an outing for 2,000 kids to Nationals Park for today’s 12:35 p.m. game due to the chance of thunderstorms. Storms never threatened and kids were none too pleased according to sources. While no raindrops fell, at least the game turned out to be a downer: the Nats lost to the Mets 9-5.

By  |  04:09 PM ET, 07/19/2012

Categories:  Forecasts

 
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