4:15 p.m. — Flood warning issued for northwest Washington, northeast Fairfax County and areas of Montgomery County inside the Beltway
In this area, one to two inches of rain have fallen and flooding has begun or could begin shortly. Up to another inch of rain could fall before these storms weaken and move off; the warning is in effect until 7:15 p.m.
4:05 p.m. — Severe storm warnings discontinued but very heavy rain passing through immediate area
The severe thunderstorm warnings in effect earlier for parts of the region have been discontinued as the high winds have diminished some. However, storms with very heavy rain stretch from near Centreville along Interstate 66 into the District and northeast to near Laurel. The entire complex is slowly pushing east. Pockets of flooding could develop in areas where storms pass over repeatedly.
Between 3 and 4 p.m., the storms that came through did bring down a few trees north and west of Washington and unleashed a gust up to 62 mph in Gaithersburg.
3:40 p.m. — Severe storm warning expanded east to cover southeast Montgomery County, northeast portions of the District and northern Prince George’s County, in effect until 4:15 p.m.
Radar shows the most intense storms from Wheaton to Silver Spring to McLean, pushing east at 15 to 20 mph. Takoma Park, Beltsville and Greenbelt are in the path of these storms. Radar indicates very strong, potentially damaging winds up to 60 to 70 mph moving over Silver Spring. Seek shelter from these storms until they pass.
3:15 p.m. — Severe thunderstorm warning for the northwest part of the District, northern Fairfax and southern Montgomery counties until 3:45 p.m.
An intense line of storms stretches from near Reston to Olney and is pushing east at 20 mph. McLean, Bethesda, northwest Washington and Silver Spring are in its path. Very heavy rain, frequent lightning and locally strong winds are possible. Head inside until these pass; it should take roughly 30 to 45 minutes. Due to the saturated ground in many areas, it won’t take much wind to bring down some trees.
Detailed forecast (published at 3:05 p.m.)
Our seemingly daily parade of showers and storms continues. With highs reaching into the 90s, the atmosphere is very unstable and fueling the developing storms. The storms, some of which could be strong to severe, continue into early evening before waning. Given saturated ground and the potential for heavy rainfall rates, keep an eye out for flash flooding in any storms. Never cross through flooded roads.
Through Tonight: Some storms have already erupted and should persist into early evening. They may remain hit-or-miss, but any may be strong to locally severe. Heavy flooding rain, lots of lightning and isolated damaging winds are the main threats. Some spots could pick up a couple inches in short order. It’ll quiet down this evening as temperatures settle into the 70s for lows overnight. Some patchy fog could form late.
Tomorrow (Saturday): Lots of sun and perhaps slightly less hot. As usual, we can’t rule out a few afternoon storms. It doesn’t look like a huge deal at the moment, though. Highs are near 90, with heat indexes in the mid-90s. Winds are light and variable.
Sunday: It’s a lot like Saturday. Plentiful sun may promote some bubbling clouds. Again there could be some showers or storms, but they don’t seem like they’ll be as widespread as some recent days. Temperatures are again around 90 for highs.
Pollen update: Grass and weed pollen are low/moderate, as are mold spores.
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August 28, 2021 at 02:26AM
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PM Update: Scattered intense storms into evening, some of which may cause flash flooding - The Washington Post
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