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Posted at 3:15 PM ET, 07/ 8/2009

PM Update: A Comfortable Evening & Cool Night

By Ian Livingston

Partly sunny, still rather cool (for July) on Thursday

* El Nino & Hurricanes | An Amazing D.C. Fireworks Show *

Lots of sunshine -- and that we sit near the warmest part of the calendar year -- made little impact today as north-and-northwest winds bring dry and relatively cool conditions. Dew points today have been all the way down into the 40s across much of the area while highs rise to near 80, a combination almost unheard of this time of year. Summer softball, kickball and other outdoor activities rarely feel so sweet in July.

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: Look for partly cloudy skies this evening with readings falling toward the mid-70s by sunset. The rest of the night should be mostly clear with temperatures entering rarified air for July in some of the suburbs. Overnight lows should range from the mid-50s in the coolest spots to nearer the mid-60s downtown.

Tomorrow (Thursday): We've bottled up the below-average temperatures and will release more of the same on Thursday. Expect mostly sunny skies early, transitioning cloudier late, as temperatures only rise toward the lower 80s most spots. Humidity may come up a bit with an onshore flow, but it remains low overall. An isolated shower is possible during the afternoon and evening.

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

Shuttle Launch: NASA is due to launch space shuttle Endeavour on Saturday at 7:39 p.m. EDT -- the weather may have other plans. A stationary front has been hung up over portions of Florida and it could stick around through the weekend. Currently, NASA forecasters only give a 40 percent chance the launch happens on schedule. Midday weather models (GFS/NAM) are split on precipitation chances, but perhaps a bit more optimistic.

By Ian Livingston  | July 8, 2009; 3:15 PM ET
Categories:  Forecasts  
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Next: Forecast: Continued Pleasant Today & Tomorrow


The record low at Dulles should be in play, maybe by a few tonight.

Posted by: Ian-CapitalWeatherGang | July 8, 2009 8:27 PM | Report abuse

A temperature below 48 with a dewpoint of 53? That would certainly be remarkable.

Posted by: CapitalClimate | July 9, 2009 12:26 AM | Report abuse

The earliest return is in on Winter 2009/10...looks quite good for snow here on the East Coast.

Posted by: Bombo47jea | July 9, 2009 12:45 AM | Report abuse

CapitalClimate, I was looking a week ahead... clearly by the forecast I was not expecting 48. Senior moment. I'm sure you understand.

Posted by: Ian-CapitalWeatherGang | July 9, 2009 8:30 AM | Report abuse

" tonight
14th century
: the present night or the night following this present day

The lows vs. (records):
Dulles 58 (48)
National 64 (55)

Posted by: CapitalClimate | July 9, 2009 10:55 AM | Report abuse

Instead of the disingenuous English lessons why don't you read what I wrote and look at next Thursday's record low (57). It was a simple error in glancing at the calendar too quickly.

Posted by: Ian-CapitalWeatherGang | July 9, 2009 11:20 AM | Report abuse

Thank you for reminding me how the rampant self-referential narcissism of the Gangstas helped confirm my original decision to spin off CapitalClimate.

Posted by: CapitalClimate | July 9, 2009 1:48 PM | Report abuse

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