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Posted at 3:25 PM ET, 06/24/2009

PM Update: Preparing to Turn Up the Heat

By Ian Livingston

Hot on Thursday and into the weekend

* NatCast | Lightning Safety | How Many 90-Degree Days at DCA? *

Much like yesterday, we've had a warm and quiet day with a few fair-weather cumulus clouds floating by overhead. Though many places saw temperatures at or above normal for the first time in a few days, it's not too bad thanks to relatively mild levels of humidity. Tranquil weather will persist through the evening as temperatures begin to fall off daytime highs mainly in the mid-to-upper 80s.

Webcam: Latest view of D.C. from the Netherlands Carillon at Arlington National Cemetery. Courtesy National Park Service. Refresh page to update. See this image bigger on our Weather Wall.

Through Tonight: After a warm but pleasant evening, most spots should dip below 80 around sunset and then cool to lows in the mid-60s for the suburbs to near 70 downtown. Partly cloudy skies early will trend mostly clear as the night wears on.

Tomorrow (Thursday): One of the hottest days we've seen so far this year is on its way. Expect mostly sunny skies and temperatures rising up to between 90 and the low 90s most locations. Welcome to summer, grab some water and sunscreen!

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

Scientists Endorse Climate Action: As legislative debate on far-reaching climate change legislation ramps up this week, nearly two dozen prominent scientists and experts issued an unusual endorsement of pending legislation. In a letter released by the nonprofit advocacy group 1Sky, 20 scientists and experts endorsed the legislation offered by Democratic Reps. Henry A. Waxman and Edward J. Markey. The bill would establish a "cap and trade" program to reduce emissions of greenhouse gases such as carbon dioxide.

"It is essential that the Waxman-Markey bill, strengthened wherever possible and certainly not weakened, advance into law rapidly," the letter states. "It is also essential that it become the basis for a serious, continuing, and urgent effort on the part of the President to lead the American public into recognition of the scale of the climatic disruption so that the U.S. will embrace still stronger policies to do what we know from scientific investigation is necessary to prevent disastrous climatic alteration." -Andrew Freedman

By Ian Livingston  | June 24, 2009; 3:25 PM ET
Categories:  Forecasts  
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Next: NatCast: Decidedly Warm but Likely Dry


feels like summer today...

Posted by: madisondc | June 24, 2009 4:26 PM | Report abuse

Yeah, right....the "endorsement" of 20 so-called "experts" is sure an excellent reason to pass it.

Mr. Q, right here on Capital Weather, is more of an "expert" than a lot of so-called "scientists" I've seen....he does some pretty good posts. And, after working a number of years in NOAA (the National Oceanic and Atmospheric Administration), I learned to distinguish real climatologists from the imposters. We had real climatologists at NOAA.

Posted by: MMCarhelp | June 24, 2009 10:56 PM | Report abuse

Weather has been far too quiet and nice lately...
Secondly, hurricane season has been quiet as well...

Posted by: Havoc737 | June 25, 2009 2:53 AM | Report abuse

About the 20 experts who signed the endorsement: The names I recognize are on the whole very good scientists, well worth listening to. NOAA would be fortunate to have them.

I've been in weather and climate 35 years.

Posted by: Dadmeister | June 25, 2009 11:50 AM | Report abuse

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