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Capital Weather Gang: April 25, 2010 - May 1, 2010

Forecast: Humidity builds, maybe a t'storm Sunday

On the handful of very warm to hot days we've experienced so far this spring, we haven't had to contend with much humidity. That won't be the case this opening weekend of May. What is a hint of humidity today grows to typical July levels tomorrow. And with all the juice in the atmosphere Sunday, we'll have the risk of some scattered late afternoon and evening thunderstorms.

By Jason Samenow  | May 1, 2010; 5:30 PM ET  |  Permalink  |  Comments (9)
Categories:  Forecasts  
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UnitedCast: Summer-like in spring

* Our Full Forecast | Weather Wall | Soccer Insider * United vs. NY Red BullsSaturday May 1, 4:00 p.m., RFK Stadium KickoffFinal WhistleWeatherChance of RainMid-80sLow 80sMostly sunny5-10%It will feel more like a June or July afternoon at RFK -- with temps in the 80s and a touch of humidity....

By Jason Samenow  | May 1, 2010; 5:00 AM ET  |  Permalink  |  Comments (1)
Categories:  UnitedCast  
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PM Update: Awesome start to the weekend

Hot and humid Sat/Sun; Some storms? * Predicting where the Gulf oil will go | Oil spill photos * * Outside now? Radar & more: Weather Wall | CWG T-Shirts * Lots of sunshine, low humidity, light refreshing winds and a Friday... Perfect? Just about. Temperatures are topping out around...

By Ian Livingston  | April 30, 2010; 3:15 PM ET  |  Permalink  |  Comments (6)
Categories:  Forecasts  
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Predicting where the Gulf oil will go

Mother Nature is no longer helping matters in the Gulf of Mexico, where the Deepwater Horizon oil rig exploded and collapsed on April 20. For a time, winds mainly from the north and west had kept the sheen of expanding oil in the Gulf of Mexico away from the Gulf Coast. But that changed starting Wednesday night, when winds shifted and began to blow from a more southerly direction. The onshore flow is expected to persist at least through the weekend, raising the prospects for devastating effects on the environment, wildlife and economy.

By Steve Tracton  | April 30, 2010; 11:15 AM ET  |  Permalink  |  Comments (3)
Categories:  Tracton  
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Forecast: Warm, warmer, then hot & muggy!

Our warm-up gains momentum today, then shifts to a higher gear over the weekend. Say goodbye to those crisp mornings, and hello to increasing heat and humidity, too. The weekend will feature all the hallmarks of summer, including a chance for afternoon and evening thunderstorms. There's good news for those not ready for a permanent shift to summer -- both temperatures and humidity look to moderate as we get into next week.

By Camden Walker  | April 30, 2010; 11:00 AM ET  |  Permalink  |  Comments (9)
Categories:  Forecasts  
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PM Update: Preparing for a taste of summer

Here we go... back to pleasant springtime weather! Of course, it may only last one or two days, depending on your definition of "pleasant" and "spring." Highs rising to around 70 and into the low 70s feel pretty mild compared to yesterday, even with some gusty breezes. Temperatures only go up in the coming few days, and at least one (if not more) of the 'H' words is likely to be uttered a few times before Sunday is over. But not yet. This evening looks like a great one for any outdoor activities.

By Ian Livingston  | April 29, 2010; 3:15 PM ET  |  Permalink  |  Comments (4)
Categories:  Forecasts  
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Hypothermia in summer: The storms of 8/3/2002

More people die from hypothermia in summer than in winter. Subfreezing temperatures are not a requirement for hypothermia to occur. All that is needed is for weather conditions or water temperatures to lower one's core body temperature below 95°F. This can happen in the summer, when people are less prepared for cold conditions. If I would've read the paragraph above before Aug. 3, 2002, I probably would'nt have paid too much attention. Well, on Aug. 3, 2002, I learned first-hand that even during summer, hypothermia can be as dangerous a threat as heat.

By Kevin Ambrose  | April 29, 2010; 11:00 AM ET  |  Permalink  |  Comments (8)
Categories:  Temperature Extremes, Thunderstorms  
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Forecast: Better days ahead (warmer and sunnier)

Are you ready for the big warm-up? Like a continental-sized see-saw, a crashing jet stream out West and cooling will result in a northward surge in the jet stream here on the East Coast and warming. How high will we go? Well, it looks like we could reach up to around 90 in places this weekend and 80s are a real safe bet starting tomorrow. A cold front arrives Monday to send our end of the see-saw back down.

By Matt Rogers  | April 29, 2010; 10:45 AM ET  |  Permalink  |  Comments (9)
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PM Update: Another frost chance before warm-up

Temperatures head for the 80s Friday, higher after? * Frost Advisory 2 a.m. through 9 a.m. N and W of I-95 * * Eight years ago: Tornado devastates La Plata, Md. | UnitedCast* * Outside now? Radar & more: Weather Wall | CWG T-Shirts * Limited sunshine this afternoon has...

By Ian Livingston  | April 28, 2010; 3:20 PM ET  |  Permalink  |  Comments (8)
Categories:  Forecasts  
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Tornado devastates La Plata, Md.: April 28, 2002

On this day in 2002, the strongest tornado on record to hit Maryland flattened portions of Charles and Calvert counties, with the town of La Plata ground zero. The tornado was classified as an F4 (on the old Fujita scale) when it ripped through that town, indicating it possessed winds of 207-260 mph.

By Jason Samenow  | April 28, 2010; 11:00 AM ET  |  Permalink  |  Comments (7)
Categories:  Thunderstorms  
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Forecast: Warm-up waits one more day

This is a tough time of year for wardrobe consistency. In typical spring fashion, the wardrobe should get a good workout as we shift from cool and breezy today, to warmer and sunny Thursday and Friday, to very warm (some might say hot) and even a little humid over the weekend. So, we go from jackets and long pants today, to shorts and sandals Saturday and Sunday. Overall, it's a pretty good forecast if you have outdoor plans, though we'll have to see if any thunderstorms pop up this weekend.

By Dan Stillman  | April 28, 2010; 11:00 AM ET  |  Permalink  |  Comments (16)
Categories:  Forecasts  | Tags:  dc forecast, dc weather, washington dc weather, weekend forecast  
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UnitedCast: Dress warmly

* Our Full Forecast | Weather Wall | Soccer Insider * United vs. FC DallasWednesday April 28, 7:30 p.m., RFK Stadium KickoffFinal WhistleWeatherChance of RainUpper 50sMid-50sMostly clear5%Winds won't be as gusty as earlier in the day. But there should still be somewhat of a breeze, making already cool temperatures in...

By Dan Stillman  | April 28, 2010; 11:00 AM ET  |  Permalink  |  Comments (4)
Categories:  UnitedCast  
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PM Update: Some frost possible overnight

Warm up begins in earnest on Thursday * Frost Advisory 2 a.m. through 9 a.m. N and W suburbs * * Saturday's tornadoes: Success amid devastation | Tornado Alley? * * Outside now? Radar & more: Weather Wall | CWG T-Shirts * With lots of sunshine around, today turned out...

By Ian Livingston  | April 27, 2010; 3:15 PM ET  |  Permalink  |  Comments (6)
Categories:  Forecasts  
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Saturday's tornadoes: Success amid devastation

As of last week, the nation's tornado activity for 2010 stood at record lows -- at least when adjusted for the "inflation" produced by ever more spotters, chasers and video cameras. But the relatively placid spring turned violent on Saturday across the Deep South as a swarm of tornadoes ripped from Louisiana to Tennessee. The NOAA Storm Prediction Center (SPC) tallied 69 preliminary tornado reports -- among the largest 24-hour totals logged in recent years -- from 7 a.m. CDT Saturday to 7 a.m. Sunday.

By Capital Weather Gang  | April 27, 2010; 11:00 AM ET  |  Permalink  |  Comments (4)
Categories:  Thunderstorms  
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Forecast: Cool today, then a steady warm up

Up, up and away! That's the direction temperatures are heading as the week progresses. Temperatures 10 degrees below average today will transition to 10 degrees above average by the weekend. Now that's a warming trend. While temperatures experience a steady rise, the dense cloud cover abruptly dissipates -- departing this afternoon, with abundant sunshine for the next several days thereafter.

By David Streit  | April 27, 2010; 8:30 AM ET  |  Permalink  |  Comments (7)
Categories:  Forecasts  
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PM Update: Showers, some thunder, into tonight

A few showers this morning gave way to a midday break in the action, but more showers and thundershowers have formed this afternoon. Showers and a few rumbles of thunder are possible for the remainder of the afternoon and into the evening. Otherwise, clouds and the pesky marine air that pushed back south across the area last evening have been slow to budge today, capping highs in the low-to-mid 60s.

By Ian Livingston  | April 26, 2010; 6:15 PM ET  |  Permalink  |  Comments (13)
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Tornado Alley: What's that???

Is there even justification for describing any single contiguous region as tornado alley (here)?

By Steve Tracton  | April 26, 2010; 11:00 AM ET  |  Permalink  |  Comments (9)
Categories:  Science, Thunderstorms, Tracton  
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Forecast: Showers, cooling, and then warming

It's a bit of a topsy-turvy week in the weather department. Today it's seasonably mild but with the threat of rain before we cool down tomorrow and Wednesday. Thursday and Friday we'll enjoy some beautiful days, warming back up into the 70s. Warm conditions probably stretch into the weekend, but the proximity of a front may bring back the chance of scattered late day thunderstorm activity.

By Jason Samenow  | April 26, 2010; 8:30 AM ET  |  Permalink  |  Comments (13)
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Severe T'storm Watch dropped for metro region

* Our Full Forecast | Storms? Radar & more: Weather Wall * The National Weather Service has discontinued the Severe Thunderstorm Watch that had been issued earlier. Nonetheless, showers and thunderstorms will impact much of the area overnight and a few could still be strong (particularly through midnight) -- with...

By Jason Samenow  | April 25, 2010; 10:45 PM ET  |  Permalink  |  Comments (13)
Categories:  Updates  
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Severe Thunderstorm Watch through the evening

* Flash Flood Warning N portion of area 'til 2:00 a.m. * * Our Full Forecast | Storms? Radar & more: Weather Wall * Scattered thunderstorms continue. While they have impacted primarily northern portions of region, a line of strong storms is now moving through the immediate metro and should...

By Capital Weather Gang  | April 25, 2010; 9:50 PM ET  |  Permalink  |  Comments (23)
Categories:  Alerts, Thunderstorms  
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Forecast: Chance of storms to close out weekend

There's some risk of an active afternoon and evening today as the storm system that brought strong tornadoes to the South moves into our area. We don't expect anything of that magnitude around here but we could see some stronger storms late this afternoon and this evening. Shower and thunderstorm chances stay with us into Tuesday but by midweek we begin to clear and start a slow warm-up towards the weekend.

By Brian Jackson  | April 25, 2010; 4:50 PM ET  |  Permalink  |  Comments (20)
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NatCast: Showers and storms threaten

* Our Full Forecast | Weather Wall | Nationals Journal * Nationals vs. DodgersSunday, April 25, 1:35 p.m., Nationals Park First Pitch9th InningWeatherChance of Rain68F71FT'storms possible60%Though some sunshine is possible, showers and thunderstorms are a decent possibility before the last pitch with rain delays possible.   NatCast appears on the...

By Brian Jackson  | April 25, 2010; 5:00 AM ET  |  Permalink  |  Comments (1)
Categories:  NatCast  
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