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Posted at 05:30 PM ET, 07/24/2010

Today's worst is over; still really hot tomorrow

* Outlook for tomorrow into next week: Full Forecast *
* Excessive Heat Warning for entire area thru 10 p.m. *
* It's so hot (news story) | Post Local coverage | Heat Tips | UnitedCast *
* Outside now? Radar & more: Weather Wall | Tropical Tracking *
* Consec days 90+: 11; Total 90+: 41 (Apr: 2; May: 3; Jun: 18; Jul: 18) *

Thankfully the District's fourth 100-degree afternoon of 2010 has come to a close. All three area airports set record highs today as the mercury neared or surpassed triple digit levels across the region with heat indices up to 110. Here are the actuals:

Reagan National: 101
Dulles: 99
BWI: 100

If you thought it was bad here, it was worse to our southeast. Richmond and Norfolk hit 105, both records.

For those headed out tonight, while the lack of blistering sunshine takes an edge off the heat, keep in mind temperatures will remain at or above 90 through 10 or 11 p.m. Tomorrow, the heat repeats - though clouds in the mid-to-late afternoon probably reduce the prevalence of three-digit readings. We'll also have a chance of thunderstorms marking the passage of a cold front that provides some relief for early next week.

100-degree days: Having logged its fourth 100-degree day this year, DCA is now tied for #5 in recorded history for the number of such days in a summer. The years ahead of it are 1997, 1980, 1988, and 1930 with 5, 6, 7, and 11 100-degree days respectively. The 1971-2000 average for 100-degree days is 1.2 per year. (Thanks to CWG's Ian Livingston for sending me this data.)

By  |  05:30 PM ET, 07/24/2010

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