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Capital Weather Gang: July 11, 2010 - July 17, 2010

Forecast: Relentless heat & no sign of relief

I am tired of being annoyed about this heat and humidity so I've come to just accept it. We all should for our collective sanity. This offensive weather pattern is essentially locked in for at least the next 5-7 days. That means a continuation of 90+ days, high humidity, compromised air quality, muggy nights, and the occasional late night or evening storm risk. Think about it this way: we're becoming pros at this...

By Jason Samenow  | July 17, 2010; 5:10 PM ET  |  Permalink  |  Comments (26)
Categories:  Forecasts  
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PM Update: Dog days heat and humidity

Today starts our climatologically warmest time of the year as the average high hits 89. The true "peak" comes from the 19th to the 27th when our low averages 71 (compared to 70 right now). Right on cue, we are seeing very hot conditions yet again. Highs today have risen to the mid-and-upper 90s. Add in high humidity and heat indices past 100 are not terribly uncommon. Unfortunately for those ready to ditch the heat, there is no major relief ahead.

By Ian Livingston  | July 16, 2010; 10:10 PM ET  |  Permalink  |  Comments (17)
Categories:  Forecasts  
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D.C. 2010: Blizzards, heat waves... earthquake?

The year 2010 is proving to be a strange one around these parts. It started with extreme winter snow. Which has been followed by extreme summer heat. And now, early this morning, the largest earthquake in the area since 1974. Fortunately, it was minor as earthquakes go -- 3.6 magnitude -- and no damage or injuries have been reported. Here's what some of you have had to say about this morning's trembler...

By Dan Stillman  | July 16, 2010; 11:00 AM ET  |  Permalink  |  Comments (9)
Categories:  Environment  
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Forecast: 90s here to stay, again

Man oh man, we will sweat this weekend. Temperatures, for the most part, will be in the 90s through the foreseeable future. This despite a cold front that moves through Saturday, but has little impact on the heat or humidity. Rain chances are few and not terribly impressive, so the prospect for any consistent cooling relief from storms isn't great. Lather on the sunscreen and keep the outdoor strenous activity to a minimum. Another extended hot streak is upon us, even if it doesn't feature highs flirting with 100.

By Camden Walker  | July 16, 2010; 11:00 AM ET  |  Permalink  |  Comments (25)
Categories:  Forecasts  
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I felt it too: Earthquake information...

* Heat advisory today - will feel like 100-105: Full Forecast * A compilation of this morning's earthquake report from the U.S. Geological Survey. Graphic adapted by CWG. I thought the rumbling propagating through my house around 5 a.m. was either the air conditioner or a truck passing through the...

By Jason Samenow  | July 16, 2010; 7:40 AM ET  |  Permalink  |  Comments (13)
Categories:  Environment  
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PM Update: Another heat wave beginning

Highs reaching the low-to-mid 90s today are accompanied by fairly uncomfortable dew points in the mid-and-upper 60s. This combination is creating heat indices about 5 degrees higher than the apparent temperature. So, after a bit of a break, it's pretty hot again.

By Ian Livingston  | July 15, 2010; 3:15 PM ET  |  Permalink  |  Comments (7)
Categories:  Forecasts  
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The thunderstorm that saved Washington

Of all the weather-related stories of Washington, this ranks as one of the more interesting. Washington weather historians will have to dig deep to find information on this storm event. But, before I begin, you may wonder how any storm could possibly save a city? Here's a hint: If an invading army sets fire to a city's buildings, a drenching East Coast thunderstorm is extremely helpful in putting out the flames. This is what happened to Washington in the summer of 1814. The invading army was the British, our city was burning, and a severe thunderstorm helped to extinguish the fires. The storm also produced serious wind damage in Washington, but that was far less destructive than the fires that burnt down the Capitol and White House.

By Kevin Ambrose  | July 15, 2010; 10:30 AM ET  |  Permalink  |  Comments (14)
Categories:  Education, Local Climate, Photography  
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Forecast: Muggy until further notice!

We know this drill very well by now, 90s and plenty of humidity through the weekend. Well it is the heart of summer so what can one expect in DC. The humidity - amplified by the recent rains - is sufficiently high to dampen our day time heating by a degree or two or three. I am not sure it is a fair trade but the big upturn in rains has been the salvation for many of our trees and gardens cashing that much-needed moisture in.

By David Streit  | July 15, 2010; 5:00 AM ET  |  Permalink  |  Comments (19)
Categories:  Forecasts  
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UnitedCast: Very warm and humid

* Our Full Forecast | Weather Wall | Soccer Insider * United vs. SoundersThursday July 15, 8:00 p.m., RFK Stadium KickoffFinal WhistleWeatherChance of RainUpper 80sMid-80sMuggy5%This is not Seattle weather. That should work in our favor right? Dress for heat and humidity but no storms.   UnitedCast appears on the day...

By David Streit  | July 15, 2010; 5:00 AM ET  |  Permalink  |  Comments (2)
Categories:  UnitedCast  
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PM Update: Rain departs, heat to fill place

After two days of dousings across much of the area, the daytime hours today have proven fairly benign outside an isolated shower or storm. Sunshine began to break through the clouds around midday and temperatures have responded by shooting into the mid-80s to around 90. All that rain of recent mixed with temperatures in the 90s over the next few days will lead to some more hot and muggy weather across the area.

By Ian Livingston  | July 14, 2010; 3:20 PM ET  |  Permalink  |  Comments (21)
Categories:  Forecasts  
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The curious case of Tom Sater

In July 2005, FOX-5 morning meteorologist Tom Sater mysteriously disappeared from the airwaves. Five years later, DCRTV reported Sunday that Sater has re-emerged on D.C.'s television scene.

By Jason Samenow  | July 14, 2010; 11:30 AM ET  |  Permalink  |  Comments (12)
Categories:  Media  
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Tropics: Caribbean may not be quiet for long

fter a quick burst of tropical activity just a couple of weeks ago, with Hurricane Alex and Tropical Depression #2 rolling across the western Caribbean Sea and Gulf of Mexico, much drier air has settled in across that region. In fact, recent satellite images across this part of the tropics show hardly any thunderstorm activity at all.

By Greg Postel  | July 14, 2010; 10:30 AM ET  |  Permalink  |  Comments (5)
Categories:  Tropical Weather  
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Forecast: Warm & swampy, just like it should be

As we become more and more removed from our intense early-July heat wave, we become more and more entrenched in classic D.C.-area summer weather -- warm and humid with occasional storm chances (and, for the past 2 nights at least, the occasional deluge). And while the humidity may be uncomfortable, it has helped to fuel the rain we needed to avoid a serious drought situation. So, let's take our licks now so we can enjoy, guilt-free, a drier pattern whenever it may come

By Dan Stillman  | July 14, 2010; 9:30 AM ET  |  Permalink  |  Comments (17)
Categories:  Forecasts  
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PM Update: Showers and storms again tonight

Flash Flood Warning for Fairfax Co., D.C. and Montgomery county through 5 a.m. Another cluster of thunderstorms with heavy rain and lightning will move through the metro region. Additional rainfall of 1 to 1.5 inches is possible in the warned area (see map below). Do not attempt to drive across flooded roadways. Turn around, don't drown.

By Ian Livingston  | July 13, 2010; 11:15 PM ET  |  Permalink  |  Comments (40)
Categories:  Forecasts  
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Ball lightning: real or fantasy?

Imagine -- or perhaps you've experienced something like this for real -- you've taken shelter at a picnic table under cover with thunderstorms roaring nearby. All of a sudden you notice a ball of light appear out of nowhere floating toward you. As the ball enters the shelter, you're amazed to hear it sizzling like a burning branch but feel no heat. It appears to float undisturbed through and then out the shelter where it bounces across the ground before disappearing. You scratch your head and wonder -- was this an illusion, a natural phenomenon, or perhaps a probe from an alien mother ship circling the Earth? If you are an oldies-but-goodies fan (or just an oldie like myself), maybe your first thought is the refrain from Jerry Lee Lewis's 1957 hit song, Great Balls of Fire: "I say goodness gracious great balls of fire...oooeee, oooee". What you might have witnessed is ball lightning, a luminous orange or reddish spherically shaped object, which averages about 6 to 20 inches in diameter and lasts a few seconds to a few minutes before disappearing (much longer than a split-second lightning bolt).

By Steve Tracton  | July 13, 2010; 11:00 AM ET  |  Permalink  |  Comments (13)
Categories:  Tracton  
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Forecast: Storms today with more heat later

The showers and storms yesterday afternoon were quite hit-or-miss. Before a late evening storms produced a brief deluge across the immediate area, National Airport had only managed .1" and Dulles fared even worse with just a wee .06" of rain. For our rain-starved metropolitan area, we'll have another chance to fill in those gaps as the exact same air mass (warm, humid, and unstable) as yesterday dominates our weather. By later this week, the storm chances will die down, but unfortunately the heat will build stronger.

By Matt Rogers  | July 13, 2010; 7:15 AM ET  |  Permalink  |  Comments (18)
Categories:  Forecasts  
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PM Update: Showers and storms into the night

A batch of widespread showers with embedded storms has moved in from the west and southwest and should last into at least mid-evening. This may be the first of several batches of showers and storms to roll through over the coming 24-48 hours. Highs today were stunted in the mid-to-upper 80s by abundant clouds. Humidity, however, has made a big return with levels pretty close to -- if not fully -- oppressive.

By Ian Livingston  | July 12, 2010; 4:10 PM ET  |  Permalink  |  Comments (26)
Categories:  Forecasts  
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NASA eyeballs glacial melt in Greenland

The Jakobshavn Isbrae glacier, one of the largest glaciers in Greenland, swiftly lost a 2.7-square mile chunk of ice between July 6 and 7, NASA announced late last week. The ice loss pushed the point where the glacier meets the ocean, known as the "calving front," nearly one mile further inland in a single day. According to the space agency, the new calving front location is the farthest inland on record.

By Andrew Freedman  | July 12, 2010; 11:00 AM ET  |  Permalink  |  Comments (27)
Categories:  Climate Change, Freedman, News & Notes, Science  
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Forecast: Muggy, warm, and at times wet

So far this summer, we've had the heat, we've had the humidity, we just haven't had the rain. This week, we'll finally get some of that rain we've been missing along with the heat and humidity we've come to know so well. At least a chance of showers and thunderstorms is in the forecast every afternoon and evening except perhaps Thursday. Maybe, just maybe, we can put away the sprinklers and our lawns will turn back to green.

By Jason Samenow  | July 12, 2010; 11:00 AM ET  |  Permalink  |  Comments (16)
Categories:  Forecasts  
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Forecast: Monday starts nice; rain chance late

Lots of sun and dry heat spell out quite a nice day for us. Enjoy it while you can because as we head into the week, the humidity grows and we'll begin to see extended periods where we have chances for showers and thunderstorms. While rain in the forecast this week won't single-handedly pull us out of our moderate drought, by week's end our lawns could be looking significantly greener.

By Brian Jackson  | July 11, 2010; 4:55 PM ET  |  Permalink  |  Comments (17)
Categories:  Forecasts  
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NatCast: Wonderful day for a ballgame

* Our Full Forecast | Weather Wall | Nationals Journal * Nationals vs. GiantsSunday, July 11, 1:35 p.m., Nationals Park First Pitch9th InningWeatherChance of RainLow 80sUpper 80sMostly sunny%The last game before the All-Star break couldn't get much better for mid-July: sunny, dry, and warm. Only a bit more of a...

By Brian Jackson  | July 11, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
Categories:  NatCast  
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