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Capital Weather Gang: September 19, 2010 - September 25, 2010

Going for the gold: National hits 90+ for 67th time

Washington, D.C. has reached 90 or higher on 66 days in 2010, the second most on record. The record is 67 from 1980 as we've stated an untold number of times on this blog. The forecast high today is around 89 -- oh, so close. We think there's a 40% chance Reagan National (DCA, D.C.'s "official" observing station) makes 90. Track today's temperature each hour right here:

By Jason Samenow  | September 25, 2010; 11:00 AM ET  |  Permalink  |  Comments (56)
Categories:  Local Climate  
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Forecast: Heat's last gasp, cooling set to begin

We've talked and talked about all the heat records we've set in 2010 but perhaps the most significant still stands: the number of 90+ days at Reagan National that occurred in 1980. Everyone knows the magic number is 67 and we're one short. Today could well be our last chance to get there and it's going to be a very close call. After today, the pattern turns cool and wet so if you like summer-like days, soak in today.

By Jason Samenow  | September 25, 2010; 5:00 AM ET  |  Permalink  |  Comments (9)
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UnitedCast: Dynamite weather

* Our Full Forecast | Weather Wall | Soccer Insider * United vs. Houston DynamoSaturday Sept. 25, 7:30 p.m., RFK Stadium KickoffFinal WhistleWeatherChance of Rain76-7969-72Partly cloudy10%A fairly pleasant evening, with temps falling back through the 70s behind the cool front from earlier today.   UnitedCast appears on the day of...

By Jason Samenow  | September 25, 2010; 5:00 AM ET  |  Permalink  |  Comments (1)
Categories:  UnitedCast  
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NatCast: Very warm early fall afternoon

* Our Full Forecast | Weather Wall | Nationals Journal * Nationals vs. BravesSaturday Sept. 25, 1:05 p.m., Nationals Park First Pitch9th InningWeatherChance of Rain83-8585-88Partly sunny15%The Boys of Summer play ball in one more summer-like afternoon: temps in the 80s with sun at times. Can't entirely rule out a sprinkle....

By Jason Samenow  | September 25, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
Categories:  NatCast  
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PM Update: Is today's record heat our 90+ finale?

Is this it? Let's hope so. Heat wave No. 8 of the year is official. We've picked up day 66 of 90 degrees or higher in D.C., and we're now only 1 short of the record of 67 in 1980. It is also the 27th day above 95. Under mostly sunny skies, much of the area has risen into the mid-and-upper 90s this afternoon. Unlike other super-hot days earlier in the season, there is much better temperature news right around the corner.

By Ian Livingston  | September 24, 2010; 3:15 PM ET  |  Permalink  |  Comments (16)
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DCA shatters record of 94, soars to 99

Reagan National's (DCA) record high today is 94 (from 1970). The hottest it's ever been (since records began) after September 23 is 96. Will we match or best either of these benchmarks?

By Jason Samenow  | September 24, 2010; 3:00 PM ET  |  Permalink  |  Comments (18)
Categories:  Extreme Heat, Local Climate  
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Tropical Storm Matthew may threaten U.S.

Tropical Storm Matthew formed in the Caribbean Sea yesterday afternoon, roughly halfway between Jamaica and South America. There's already been much speculation on the potential for Matthew to impact the U.S., and how an active tropics and overall change in the weather pattern may bring substantial rains to what's been a dry Eastern U.S.

By Greg Postel  | September 24, 2010; 11:00 AM ET  |  Permalink  |  Comments (10)
Categories:  Tropical Weather  
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Video: 90+ degree day contest drawing

* More 90s today: Full Forecast | Dulles breaks 90-degree record * Your Browser DoesNot Support IFrames....

By Jason Samenow  | September 24, 2010; 11:00 AM ET  |  Permalink  |  Comments (1)
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Forecast: Near-record heat today to slowly ease

Really hot today. As in, record highs of 94 (National) and 92 (Dulles) are in jeopardy. Saturday's pretty warm too, even though a cold front comes through early in the day. (Are ya rooting for our cold front as much as I am?!) The cooler air finally makes it in for Sunday as autumnal temps return. We'll have a chance to break this streak of mostly dry weather as we get into the early part of the work week.

By Camden Walker  | September 24, 2010; 7:30 AM ET  |  Permalink  |  Comments (13)
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Dulles breaks 90-degree record

D.C.'s official weather station -- Reagan National Airport -- is still three 90-degree days away from breaking the 90+ record of 67 set in 1980. But the deed is done out at Dulles Airport. Thursday's high of 93 at Dulles not only tied the record high for the day, but put Dulles over the top for most 90+ days in a year.

By Dan Stillman  | September 24, 2010; 5:00 AM ET  |  Permalink  |  Comments (4)
Categories:  Extreme Heat, Local Climate  
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NatCast: Balmy for the Braves

Gosh it will be warm. Drink lots of water. But at least shower/t'shower chances are very slim. Why did the Braves bring us Atlanta weather?!

By Camden Walker  | September 24, 2010; 5:00 AM ET  |  Permalink  |  Comments (1)
Categories:  NatCast  
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PM Update: Hot today and scorching tomorrow

It's hot, it's humid, it's what we've come to expect this summer. Wait, no... it's not summer anymore. Well, it is hot and humid... again. Temperatures have climbed back into the lower 90s most spots this afternoon and just one or two cooling showers are roaming over the far western suburbs. This evening will be mild, the overnight warm, and tomorrow somewhat of a scorcher.

By Ian Livingston  | September 23, 2010; 3:30 PM ET  |  Permalink  |  Comments (19)
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Weather Channel: D.C. had worst summer in U.S.

Of all this country's great cities, Washington, D.C. suffered through the worst weather conditions this summer according to The Weather Channel (TWC). Our Nation's Capital beat out Little Rock, AK (2), Des Moines, IA (3), Brownsville, TX (4), and Los Angeles, CA (5) for this unenviable distinction.

By Jason Samenow  | September 23, 2010; 1:45 PM ET  |  Permalink  |  Comments (12)
Categories:  Extreme Heat, Local Climate, U.S. Weather  
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Comparing, defining D.C.'s record summer heat

Since D.C. recorded it's warmest meteorological summer on record, other warmth marks have been surpassed, like the 90+ days record at Baltimore. At D.C., we're headed ever closer to that record as well. Even falling short would be an achievement, leaving #2 about a week of 90s behind. Summer heat is pretty typical around here, but this one had staying power and disregard for the calendar unlike just about any other.

By Ian Livingston  | September 23, 2010; 11:00 AM ET  |  Permalink  |  Comments (23)
Categories:  Latest, Local Climate  
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Forecast: Hot and humid for two more days

Even the sun angle now says it is fall, yet summer remains steadfast with two more 90+ days likely to go in the books. A cool front gently pushes through the area on Saturday and saves us from tying the record for most 90+ days for the year, we hope. An isolated thundershower is possible. Finally by Sunday, seasonable weather arrives but likely under cloak of clouds due to a strong onshore flow. An upper level low brings the prospect of much needed rain to the area on Monday.

By David Streit  | September 23, 2010; 5:00 AM ET  |  Permalink  |  Comments (19)
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NatCast: A summery afternoon!

* Our Full Forecast | Weather Wall | Nationals Journal * Nationals vs. AstrosThursday September 23, 4:35 p.m., Nationals Park First Pitch9th InningWeatherChance of Rainupper 80smid 80sHot and humid5%It sure feels like July with heat, humidity and not a breath of breeze. Pitch the fries and stick with a cold...

By David Streit  | September 23, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
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Storm threat wanes, muggy overnight

Astronomical summer is ending on a summery note with high heat and the risk of severe storms. One such storm has popped up to the west and is now moving through northern Loudoun County with the risk of damaging winds up to 60 mph and small hail. So far, this is the main game in the area, and it's covering a small area. Many spots probably end up not being impacted, but additional storm formation is possible.

By Ian Livingston  | September 22, 2010; 9:30 PM ET  |  Permalink  |  Comments (28)
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Global warming, global weirding, or what?

White House science advisor John Holdren made news when, in a recent presentation, he recommended describing the changes occurring to the Earth's climate as "global climate disruption" as opposed to "global warming." Holdren referred to the term global warming as a "(dangerous) misnomer."

By Capital Weather Gang  | September 22, 2010; 12:30 PM ET  |  Permalink  |  Comments (36)
Categories:  Climate Change  
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Into the fog: when the weather was a secret

"Umpires have called the game for reasons I cannot speak of..." Can you imagine listening to a football radio broadcast and hearing the above words? In the third chapter of his book, Secrets of Victory: the Office of Censorship and the American Press and Radio in World War II, Michael S. Sweeney says that's exactly what happened sometimes during WWII ball games when foul weather was the culprit.

By Don Lipman  | September 22, 2010; 10:45 AM ET  |  Permalink  |  Comments (3)
Categories:  History, Lipman  
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Forecast: First days of fall to feel like summer

Maybe I'm in the minority, but typically I don't mind late-September heat. It helps keep that summer spirit alive just a little longer, and the weaker sun takes the edge off a bit. That said, we've had so much heat this summer that there's certainly plenty of merit to the "enough is enough" mentality, especially with heat now returning just as fall begins (officially at 11:09 p.m. tonight). We'll have three shots at 90 or above before the next cool down, moving us ever closer to the 1980 record of 67 90-degree days.

By Dan Stillman  | September 22, 2010; 5:00 AM ET  |  Permalink  |  Comments (14)
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NatCast: Hey, who invited 80s?

Summer thrives in its waning hours (fall begins at 11:09 p.m.). If we do see a shower or storm, it should be fairly brief.

By Dan Stillman  | September 22, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
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PM Update: Falling back to summer, briefly

Another gorgeous day is under our belts and we've got a late-season heat surge upcoming. Highs have reached the upper 70s and lower 80s this afternoon, which is pretty close to average this time of year. If you shut off the air conditioner recently, you can keep it that way through tonight at least.

By Ian Livingston  | September 21, 2010; 3:15 PM ET  |  Permalink  |  Comments (5)
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Risk for U.S. hurricane landfall increasing

As the remnants of Igor disintegrate over the North Atlantic, subtle changes in the global weather patterns are now taking place that may well allow a tropical storm or hurricane strike in the U.S. before the month is over.

By Greg Postel  | September 21, 2010; 1:30 PM ET  |  Permalink  |  Comments (4)
Categories:  Latest, Tropical Weather  
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Why weather matters

Weather and climate have been and remain integral factors -- directly or indirectly -- in a majority of socioeconomic activities in the lives of individuals, families, tribes, countries, and the global community. Regardless of who you are and where you live, just about everything in life is affected by weather. As the theme of a new National Research Council (NRC) report describes, weather matters!

By Steve Tracton  | September 21, 2010; 10:45 AM ET  |  Permalink  |  Comments (7)
Categories:  Reports, Tracton  
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Forecast: A never-ending summer story

Just when you think the summer is over and the 90s are finally vanquished for this year, here they come again, trying to best that 1980 record. After an excellent day today, the heat is back in action tomorrow through possibly Saturday. Look for humidity increases sufficient to justify air conditioning. Will this week be the end of 90-degree weather? It is tough to say. This pattern type suggests Mother Nature may have at least one more round of heat in her yet.

By Matt Rogers  | September 21, 2010; 5:00 AM ET  |  Permalink  |  Comments (12)
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NatCast: Nice night!

* Our Full Forecast | Weather Wall | Nationals Journal * Nationals vs. AstrosToday, 7:05 p.m., Nationals Park First Pitch9th InningWeatherChance of Rain7670Mostly clear skies5%A very nice evening to catch a late-season game.   NatCast appears on the day of every Nationals home game. Also, if you haven't already, join...

By Matt Rogers  | September 21, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
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PM Update: Cool tonight, near-perfect tomorrow

While I'd join ranks with those who think today was more than a "7", the only thing that kept it from being perfect in my mind was that it's a Monday. Highs are reaching the upper 70s to near 80 this afternoon under a crystal clear and deep blue sky. A bit of a breeze may add a slight chill from time to time in the shade but it's nothing to frown upon. We've got another near-perfect day ahead tomorrow before the heat cranks back up for a few days.

By Ian Livingston  | September 20, 2010; 3:15 PM ET  |  Permalink  |  Comments (5)
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Warm nights fuel summer heat records

As we approach the autumnal equinox on Sept. 22, it's time for one final look at just how hot it was this past summer in the D.C. area and beyond. We've already reported that the meteorological summer of 2010 -- June, July and August -- was the hottest on record in Washington, and that Baltimore broke its record for the most 90+ degree days in a single year. Now comes word from the Natural Resources Defense Council (NRDC), an environmental group, that out of the 1,218 weather stations in the contiguous United States that are part of the National Oceanic and Atmospheric Administration's (NOAA) Historical Climatology Network (HCN), 153 recorded their hottest summer on record, and nearly one in three stations recorded average temperatures among their five hottest on record. Furthermore, the new report states that nearly one in four weather stations in the HCN had their hottest average nighttime lows ever recorded.

By Andrew Freedman  | September 20, 2010; 10:45 AM ET  |  Permalink  |  Comments (31)
Categories:  Climate Change, Extreme Heat, Freedman, Local Climate  
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Forecast: Sensational start to week, then sticky

The regularity of pleasantly warm and dry days is nice, but our lawns are paying a price. Rainfall is less than a third of what it should be for the month. We get more dry (and nice) days to start off the week, but the arrival of a very warm and humid air mass midweek provides some scattered shower chances. The best chance of rain this week probably comes this weekend when a strong cold front moves into the area.

By Jason Samenow  | September 20, 2010; 5:00 AM ET  |  Permalink  |  Comments (11)
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NatCast: Clear and almost crisp

* Our Full Forecast | Weather Wall | Nationals Journal * Nationals vs. AstrosToday, 7:05 p.m., Nationals Park First Pitch9th InningWeatherChance of RainLow 70sMid-60sClear0%It's going to be a beautiful start to a 10-game home stand. You'll almost need a light jacket as temps drop into the mid-60s by the late...

By Jason Samenow  | September 20, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
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Forecast: Splendid Sunday through Tuesday

Our short-term streak of decent, fairly autumnal weather is hard pressed to end. Even a weak cold front that would like to move through our region tonight should only throw a few clouds our way (and perhaps an isolated shower). While this cool, dry air reinforcement should keep our temperatures and humidity in check for a bit, we do need the rain. Summer not to be forgotten, we may get warmer toward 90 degrees later this week...

By Camden Walker  | September 19, 2010; 5:00 AM ET  |  Permalink  |  Comments (10)
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