D.C. area forecast: Two more days of sweltering and storming; welcome weekend clearing

Flash Flood Watch today Noon through Evening.

Today’s Daily Digit

A somewhat subjective rating of the day’s weather, on a scale of 1 to 10.

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It’s not the heat it’s the humidity and the storms don’t make it any better.

Express Forecast

Today: Steamy and stormy. Highs: 84-88.

Tonight: Lingering t-storms. Lows: 67-71.

Tomorrow: More storms mainly in afternoon. Highs: 82-86.

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.

A frequent eye on the radar is going to be required today and tomorrow. The flow straight out of the south keeps the assembly line of moisture coming non-stop. While we saw first hand these storms can happen anytime, odds are strong that they congregate in the afternoon and evening. Finally, tomorrow a front comes to our rescue but at a price as a likely line of thunderstorms along it could complicate getting out of town. Our lucky streak of winning weekend weather is still intact though, with less heat and humidity Saturday and Sunday!

Today (Thursday): The morning could see a stray shower or downpour left over from last night. As the temps rise into the afternoon, so does the air making thunderstorms increasingly likely (80% chance). While there is no official severe storm threat, it is likely that highs still reach the mid-to-upper 80s and strong storms should not be ruled out with that kind of heat. Much of the area should average around a half inch but much heavier local amounts are likely. Winds are relatively ineffectual in the cooling department at just 5-10 mph out of the south, except in thunderstorms, of course. Confidence: Medium-High

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Tonight: Thunderstorms are still quite likely in the evening (70% chance), then gradually dissipating. but showers could linger through midnight at least. Winds are calm outside of early thunderstorm gusts. The swampy air keeps lows in the upper 60s to  lower 70s. Confidence: Medium-High

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

Tomorrow (Friday): There is not much improvement in the heat and humidity. Light southwest winds offer little relief and a fair amount of sun makes it even more uncomfortable. By afternoon, a cold front begins to march over the Appalachians and lays siege on the area as thunderstorms are likely to pop up rapidly heading west to east across the area (60% chance). Snarled weekend traffic is a possible outcome so you might want to think about a later escape? Highs are mainly in the mid-80s.  Confidence: Medium-High

Tomorrow night: Lingering showers through the early evening are still a good bet but they rapidly die out. By midnight, the front has passed us by with a brisk west wind finally helping to scour out the humid air. Hopefully, it clears out in time to allow a glimpse of the full moon, which for June is appropriately nicknamed the Honey Moon. Lows range from upper 50s in western burbs to mid-60s downtown. Confidence: Medium-High

A LOOK AHEAD

Saturday sees the earliest sunrise of the year (5:42 a.m. downtown). But for most of us that is welcome, giving us more time to enjoy the drier air, blue skies and slightly less heat. Highs are seasonable with low-to-mid 80s across the region. The evening will be a delight with readings quickly slipping into the 70s and calm winds. Overnight lows respond well to the drier air and drop comfortably to the mid-to upper 50s but linger in the lower 60s downtown. Confidence: High

Sunday is a fine example of a Mid-Atlantic  summer day with scads of sun and scattered afternoon puffy clouds. Highs are mainly in the mid-80s. The evening is another winner and lows end up in the mid-60s. Confidence: High

Monday ratchets up the heat and humidity a tad but not intolerably. Great pool and beach weather with highs in the mid-to-upper 80s and plenty of sun. A few thundershowers might try to sneak up from the south by evening but the chance is only 20%. Confidence: Medium

Also on Capital Weather Gang

Showers and storms soak much of D.C. area, water rescues in Montgomery County; more storms possible Thursday