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Posted at 05:00 AM ET, 07/27/2011

Forecast: Terrific today, then temps back toward 100 with increasing humidity

Today's Daily Digit
 
A somewhat subjective rating of the
day's weather, on a scale of 0 to 10.

 
Maybe still too hot for some. But on a relative scale, low-humidity warmth near 90 is close to perfect for July.
 
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EXPRESS FORECAST

Today: Sunny, refreshing. Upper 80s to low 90s. | Tonight: Mostly clear. Mid-60s to near 70. | Tomorrow: Partly sunny, a bit more humid. Low-to-mid 90s. | A Look Ahead | Get Express Forecast by E-mail

FORECAST IN DETAIL

First things first - today is among this July’s best, with highs around average and not much humidity to speak of. Sadly, the same can’t be said for tomorrow into the weekend. The heat and humidity both ratchet upward, with record heat possible Friday as temperatures make a run at triple digits, before slowly stepping back Saturday and more so on Sunday. Shower and storm chances probably don’t enter the picture until Friday and even then they’re not too high.

Today (Wednesday): Sunshine should be just as abundant as yesterday’s brilliant blue skies, and the humidity remains comfortably low. There’s even a chance Reagan National falls short of 90 for the first time since July 17, though with highs in the upper 80s to low 90s, chances are just as good D.C. records its 10th consecutive day at or above the 90 mark. Winds are light and refreshing from the north/northwest. Confidence: High

Tonight: Mostly clear skies and calm winds foster a second straight night - and probably the last for at least several days - with temperatures cooling to near average, despite slowly rising humidity. Look for lows in the mid-60s in the suburbs to around 70 downtown. Confidence: High

Keep reading for the forecast through the weekend...

Tomorrow (Thursday): Not a terrible day but the heat and humidity are definitely on the comeback. We’ll call it partly sunny and moderately humid with highs heading for the low-to-mid 90s. Afternoon heat index values should reach the mid-to-upper 90s. Confidence: High

Tomorrow night: Wish I could say it ain’t so, but it starts to feel pretty muggy again with some clouds and lows in the 70s. Confidence: Medium-High

A LOOK AHEAD

Friday, the heat surges back into near-record territory with partly to mostly sunny skies and highs in the upper 90s to near 100. Records for the day, in fact, seem quite reachable - 99 in D.C. and 97 at Dulles. While the humidity will probably be lower than the peak of our last heat wave, it’s still likely high enough to push maximum heat index values to near 105-110. Also, can’t forget a 20-30% chance of a late-day storm. Friday night, we’re in jeopardy of more record warmth with downtown lows in the upper 70s to near 80 (the record high minimum for the night is 78). Confidence: Medium-High

Skies stay partly sunny Saturday and Sunday and the heat gradually steps back. Even so, Saturday still shapes up as a scorcher with highs at least to the mid-90s and the heat index trying to top out near 100 (that is quite the warm welcome for the first day of the Legg Mason Tennis Classic in Rock Creek Park). Sunday highs should be more like low-to-mid 90s but still with plenty of humidity. Both days carry a 30-40% chance of showers/storms. Confidence: Medium

By  |  05:00 AM ET, 07/27/2011

Categories:  Forecasts

 
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