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Posted at 3:20 PM ET, 08/17/2009

PM Update: Heat Continues to Deliver

By Ian Livingston

Sill warmer than normal tomorrow; PM storms?

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As has been the case on other hot days this summer, some patchy cloudiness helped keep temperatures from reaching their full potential in a few spots today. But all in all, it's a hot one, even if humidity levels are not terrible. Highs are generally ranging from near 90 into the low 90s, with some mid-90s possible before all is said and done. Look for dry conditions scattered cloudiness as we head into evening.

Temperatures: Current area temperatures. Powered by Weather Bonk. Map by Google. Hover over and click icons for more info. Click and hold on map to pan. Refresh page to update. See map bigger on our Weather Wall.

Through Tonight: Under partly cloudy skies, temperatures fall back into the mid-80s for sunset and ultimately to lows ranging from the upper 60s to lower 70s. Skies will be partly to mostly clear late night.

Tomorrow (Tuesday): Morning should be at least partly sunny, but clouds increase as the day goes on, and there's a risk of an isolated shower or storm during the afternoon or evening. It will still be hot though as highs rise from near 90 into the low 90s. Humidity levels that have been moderate will begin climbing toward high.

See Jason Samenow's full forecast through the weekend. And if you haven't already, join us on Facebook and follow us on Twitter.

90-Degree Days: Today is the 17th day this year -- 16th of the summer -- where temperatures rose to 90 or higher at National Airport (DCA). After a slow start, things have been rolling along since mid-July, with 14 occurrences since July 12, and seven so far in August. The rest of the week will bring a few more opportunities to add to those numbers. If you keep track, how many days has your location been above 90?

By Ian Livingston  | August 17, 2009; 3:20 PM ET
Categories:  Forecasts  
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Comments

My location, just behind National Harbor, has reached 90 once this year, and NONE this summer. It was during that hot spell (with beautifully low humidity) back in late April.

Speaking of low humidity... the last two late afternoon/evening time periods has seen dew points in the mid to upper 50's at Reagan National, quite comfortable. How come with a south wind has this been happening? Shouldn't a southerly fetch be bringing in higher dew points? Just curious, not complaining!

Posted by: pjdunn1 | August 17, 2009 5:46 PM | Report abuse

Welcome back to the real world. This is summer, and it is Washington. There was simply no way that the conditions of June and early July were going to last the whole summer. The Bermuda High, and its southerly flow of heat and humidity, is a Mid-Atlantic institution every summer.

Posted by: MMCarhelp | August 17, 2009 9:54 PM | Report abuse

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