Heat Advisory Today From Noon to 8 p.m.

2:30 p.m. update: Morning clouds provided a welcome delay to today’s heat. But plenty of afternoon sun has temperatures coming on strong, now in the mid-90s across the area and headed to at least the upper 90s. Heat indices are also living up to their advertised potential, closing in on the 105 mark. The D.C. record high for the date of 103 is probably safe, but Dulles’s record high of 98 could be reached or surpassed.

From earlier...


Today: Sunny, becoming humid. 20-30% chance of p.m. storm. 96-100. | Tonight: 20-30% chance of evening storm. 75-80. | Tomorrow: Still hot and humid. 30% chance of storms. 95-99. | A Look Ahead | Get Express Forecast by E-mail


Today (Thursday): A bright sun is not too oppressive in the morning as our humidity levels are still working to recover from yesterday’s dry air intrusion. Unfortunately, it does catch up with us by afternoon and the lack of a breeze results in a heat index in the mid-100s. Personally, I call it a sweat factor of 10! Highs reach the upper 90s to near 100 and we do have a 20-30% chance of a strong afternoon thunderstorm. Record highs for the date are 103 at Reagan National, 101 at BWI and 98 at Dulles. Confidence: High

What is the Storm Threat Level?

Tonight: Muggy should be a four letter word this evening with readings reluctantly falling into the 80s. Still a 20-30% chance of a storng thunderstorm. Breezes remain a no show. Lows do eventually reach the mid-70s to near 80. Confidence: High

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

Tomorrow (Friday): The sun may peer through a little more of a haze than today but that does little to stop the pace of heating with mid-to-upper 90s on tap for highs (records for the date are 100 at National, 98 at Dulles and 101 at BWI). An approaching cold front gives us a little better chance (30%) of showers and thunderstorms. Humidity is still sliceable much of the day with very little breeze to ease the pain. Confidence: Medium-High

Tomorrow night: A few thundershowers may linger into the evening (30% chance) but should die out around sunset. Readings then are still well into the 80s. A light breeze should begin to come out of the north, but barely makes a dent in the humidity. Lows end up in the 70s. Confidence: Medium-High


Saturday should be back to more tolerable levels; both for temperatures and humidity. Highs should be mainly in the low 90s. The atmosphere remains conducive to a 30-40% chance of a some pop-up afternoon thundershowers. Evening readings fall through the 80s into the 70s. Overnight lows reach the more comfortable upper 60s to lower 70s. Confidence: Medium-High

Sunday is a fine sunny summer day with seasonable highs expected in the upper 80s to near 90. More importantly, humidity levels should be even lower, making for a nice day to get out and enjoy with shower/storm chances down to 20-30%. The evening is even better with readings dropping into the 70s. Lows reach the mid-60s outside the beltway to low 70s downtown. Confidence: High

Monday is another fine day with moderate humidity and highs in the upper 80s to low 90s. There is a slight chance of a late-day thundershower. Confidence:Medium