D.C. area forecast: Sort of like summer today, then perfectly pleasant yet again

Today’s Daily Digit

A somewhat subjective rating of the day’s weather, on a scale of 0 to 10.

6
Flirting with 90 again, a few p.m. storms possible. Still relatively tame for August in D.C.

Express Forecast

Today: Partly sunny. 40% chance of p.m. storms. Highs: Upper 80s to near 90.

Tonight: 40% chance of evening storms. Lows: Low-to-mid 60s.

Tomorrow: Mostly sunny, low humidity. Highs: Mid-80s.

FORECAST IN DETAIL


Radar & lightning: Latest regional 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.

If for some reason you’re looking for that true combination of summer heat and humidity, you aren’t going to find it in this forecast. Today is plenty warm, with perhaps a few storms late, but the humidity is tolerable even if a bit higher than yesterday. Tomorrow and Friday we’re back to weather that is way more pleasant than you’d expect for early August. The weekend then offers the most challenging part of the forecast.

Today (Wednesday): Skies should start partly to mostly sunny, followed by increasing afternoon clouds. With light winds around 5-10 mph from the west, the humidity isn’t too bad, in the moderate range at worst with highs in the upper 80s to near 90. A cold front coming through means a 30-40% chance of scattered showers and thunderstorms mid-afternoon into early evening (approximately 3-9 p.m. is the most likely time). Any storms could produce a hefty downpour along with a gusty breeze and some lightning, but these look more like your garden-variety storms than anything severe. Confidence: Medium-High

Tonight: We’ll hold on to that 40% chance of scattered showers and storms through early evening, but then just partly cloudy after 9 p.m. or so. Temperatures should cool nicely as light winds from the northwest dry us out overnight. Lows fall mainly to the low-to-mid 60s. Confidence: Medium-High

For related traffic news, check out Dr. Gridlock. Keep reading for the forecast through the weekend…

Tomorrow (Thursday): The cold front is gone and leaves behind a terrific Thursday. We’re talking mostly sunny skies, low humidity and highs reaching the mid-80s. Add in a nice breeze around 10 mph from the north, and this could be Nice Day Sun material, even though temperatures may be borderline too warm for the criteria. Confidence: High

Tomorrow night: We’ve had a number of nice evenings this summer, and this one is right up there. Evening temps drop into the 70s with that continued low humidity. Overnight lows dip to the low-to-mid 60s for most of us, perhaps a few upper 50s far north and west of town. Confidence: High

A LOOK AHEAD

High pressure tries to suppress any showers and storms Friday and Friday night, and I do believe it will succeed. That leaves us with mostly sunny skies and Friday highs in the mid-80s, as the humidity remains in check. Friday night lows range through the 60s. Confidence: Medium-High

Models have not come to a consensus on whether a system tracks far enough south of us this weekend to keep us mostly sunny and dry, or tracks close enough to bring more clouds and a chance of showers and storms. If we do see showers and storms, they seem more likely on Sunday than Saturday. Highs should continue to top out somewhere in the mid-80s. Confidence: Low

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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Dan Stillman · August 6