Radar courtesy MyRadar | ？ OpenStreetMap contributors

       4:10 p.m. — Severe thunderstorm warning expanded into southern Montgomery County, northwest Washington and northeast Fairfax County, in effect until 4:45 p.m.

       The storm over Arlington and Alexandria has expanded north into McLean and Bethesda and even parts of Silver Spring. Locally very strong winds are possible with this cell, as it slowly drifts northeastward. It may also produce some localized flooding.

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       4:00 p.m. — Severe thunderstorm warning until 4:15 p.m. in the District and neighboring Arlington and Alexandria; flood warning for Arlington and west central part of District

       A slow-moving and, at times, intense thunderstorm over Arlington, Alexandria and the District is only slowly drifting to the northeast (near 10 mph). It has already produced up to an inch of rain prompting a flood warning for Arlington County and the west central portion of the District until 6:45 p.m.

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       Try to avoid driving near streams and other low-lying or poor drainage areas. If you encounter a flood road, do not attempt to cross it, turn around.

       In addition to the torrential rain and frequent lightning, the storm has also produced some small hail.

       Original forecast from 4 p.m.

       You’d be forgiven if thinking Florida has relocated itself to the D.C. area. It was yet another day of high heat and humidity delivering thunderstorms. On the bright side, it kept temperatures from hitting the mid-90s in town. Meanwhile the storms responsible for some cooling linger and meander into early evening.

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       Through Tonight: Storms in the area this afternoon should help settle the atmosphere down by evening, although an isolated storm or two could linger till sunset. The main threats are heavy rain, frequent lightning, some hail and perhaps isolated damaging wind. Overnight, it’s partly cloudy as we settle through the 70s. Given the very muggy air mass, some fog may form. Winds are light from the south.

       View the current weather at The Washington Post.

       Tomorrow (Friday): It’s the same old story. Plenty of morning sunshine paves the way for the potential of afternoon storms, some of which could be strong to severe. Before that, temperatures surge to the low and mid-90s. Humidity remains high, so a heat index around 100 is possible at times during peak heating. You can thank those dew points near 70.

       See David Streit’s forecast through the weekend. And if you haven’t already, join us on Facebook and follow us on Twitter and Instagram. For related traffic news, check out Gridlock.

       Rain, rain, every day: This is the 16th day we’ve seen measurable rain in Washington this

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