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Capital Weather Gang: May 16, 2010 - May 22, 2010

Forecast: Shower risk grows late today into Sunday

I hate to say it, but increasingly numerous showers this weekend may frustrate many of you with outdoor plans. Will it rain the whole time? No. I'm not talking about a washout. In fact, through early-to-mid afternoon today, it's mainly dry. But beginning mid-to-late this afternoon and especially overnight and into tomorrow, we will most likely have to dodge on-and-off showers. And the cloudy, damp weather pattern may extend into early next week.

By Jason Samenow  | May 22, 2010; 3:05 PM ET  |  Permalink  |  Comments (9)
Categories:  Forecasts  
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NatCast: Chance of showers, especially late

* Our Full Forecast | Weather Wall | Nationals Journal * Nationals vs. OriolesSaturday May 22, 4:05 p.m., Nationals Park First Pitch9th InningWeatherChance of RainMid-70sNear 70Chance of showers40%Showers will probably be developing in the area during the game. Though the bulk of the rain may hold off until later in...

By Jason Samenow  | May 22, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
Categories:  NatCast  
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PM Update: A warm kickoff to the weekend

We've got just a few thin high clouds scooting by this afternoon during an otherwise mostly sunny day. Temperatures that quickly jumped this morning are now settling into the mid-and-upper 80s for highs, and the warm day is about to transition into a mild and excellent start to the weekend this evening.

By Ian Livingston  | May 21, 2010; 3:15 PM ET  |  Permalink  |  Comments (3)
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While Haiti recovers, hurricane season looms

Imagine a massive glob of molasses sliding down a mountainside into a valley and smothering everything in its path. In effect, this is how soggy soil acts when there are no trees to hold it in place. It creates a mudslide. In Haiti, a country that has lost more than 98 percent of its natural forests, not to mention experiencing a devastating earthquake earlier this year, the population is more vulnerable than ever to mudslides and flooding.

By Ann Posegate  | May 21, 2010; 11:10 AM ET  |  Permalink  |  Comments (4)
Categories:  International Weather, Posegate, Tropical Weather  
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Forecast: Weekend showers a worry?

Today's 80s may be too hot for some, especially on the trip home for those observing Bike to Work Day. Increased weekend clouds help bring highs down to the 70s as humidity ticks upward. The extra moisture in the air combined with lower pressure could spark showers and thunderstorms at times over the weekend.

By Camden Walker  | May 21, 2010; 9:00 AM ET  |  Permalink  |  Comments (14)
Categories:  Forecasts  
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NatCast: Mild night to mingle with O's fans

It's always fun when the Orioles come to town, made even more fun by this evening's pleasantly mild conditions.

By Dan Stillman  | May 21, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
Categories:  NatCast  
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PM Update: Basking in wonderful warmth

We're into the time of year that when sun shines temperatures are usually warm and today was no exception. Highs are now reaching near 80 and into the lower 80s with only a cloud or two in an otherwise crystal clear sky. This evening will be pretty awesome, so get outdoors if possible.

By Ian Livingston  | May 20, 2010; 3:15 PM ET  |  Permalink  |  Comments (3)
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There is hail, and there is hail

So Capital Weather Gang visitor tagryn shot this video in Waldorf last Friday, when severe thunderstorms tore through the area, producing some impressive hail:

By Jason Samenow  | May 20, 2010; 12:30 PM ET  |  Permalink  |  Comments (4)
Categories:  Thunderstorms  | Tags:  dc hail, hail, oklahoma city hailstorm, oklahoma hail, waldorf md hail  
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The fog of the Cape Cod wind farm

I've been fortunate to spend some to all of most summers somewhere on wondrous Cape Cod. It has changed a lot over the years with increasing development and population growth continually encroaching upon the natural environment, especially the coastal regions facing Nantucket Sound. One thing that has not changed is the prodigious frequency of summer fog over Nantucket Sound that frequently encroaches upon the Cape and The Islands (nearby Nantucket and Martha's Vineyard). Yet, there are many beautiful days with bright sun, low humidity, light winds, and calm seas which are perfect for outdoor activities ashore, at the beach or on a boat. But, there is the distinct possibility that completion of the newly approved wind farm off the south shore of the Cape (here and here) will change that by inducing fog formation on just those days one would otherwise expect to be fog free.

By Steve Tracton  | May 20, 2010; 10:30 AM ET  |  Permalink  |  Comments (3)
Categories:  Education, Environment  
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Forecast: Warm weather to stage short comeback

For those of you who refused to turn your heat on the past few days, your reward is finally here. Today turns out slightly warmer than normal and best of all humidity won't be a factor. Tomorrow checks in warmer and muggier but it will feel good to many after the recent cool snap and will only stick around one day. Temperatures cool off a little this weekend, ranking close to perfection in the pleasant 70s. The only problem is the risk of showers Saturday and Sunday afternoons.

By David Streit  | May 20, 2010; 5:00 AM ET  |  Permalink  |  Comments (7)
Categories:  Forecasts  
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NatCast: Only thing better than the weather...a win!

* Our Full Forecast | Weather Wall | Nationals Journal * Nationals vs. MetsThursday May 20, 7:05 p.m., Nationals Park First Pitch9th Inning WeatherChance of RainUpper 70sLower 70sClear0%A perfect evening for a game with mild temperatures, low humidity and light breezes.   NatCast appears on the day of every Nationals...

By David Streit  | May 20, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
Categories:  NatCast  
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PM Update: Clouds on their way out!

We're finally climbing out of the cool and gloomy weather of recently, and a few spots have even seen a hint or two of sunshine today. Highs are still below average, ranging from near 60 into the mid-60s this afternoon most spots. But by tomorrow, we'll see sun return and temperatures rise back near and above normal levels for this time of year.

By Ian Livingston  | May 19, 2010; 3:15 PM ET  |  Permalink  |  Comments (3)
Categories:  Forecasts  
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Breezy May evening on the National Mall

May started off quite warm, a perfect opportunity to head down to the National Mall for a dusk photo shoot.

By Ian Livingston  | May 19, 2010; 11:00 AM ET  |  Permalink  |  Comments (1)
Categories:  Photography  
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Forecast: Warmer today, sunnier tomorrow

Midnight Sunday night is the last time skies at Regan National were reported as anything less cloudy than overcast, and an hour later is the last time National's temperature was as high as 65. We'll see a nice jump in temperatures today, but the sun still struggles to break through. The sun then comes back in a big way Thursday and Friday as highs soar back to where they should be this time of year, if not a little warmer. Saturday and Sunday don't look as nice, though there's a lot of wiggle room in the forecast.

By Dan Stillman  | May 19, 2010; 8:15 AM ET  |  Permalink  |  Comments (6)
Categories:  Forecasts  
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NatCast: Better weather for return home

The Nats return home to generally improving weather, with partly cloudy skies and temperatures in the 60s. Just a chance of a passing shower.

By Dan Stillman  | May 19, 2010; 8:15 AM ET  |  Permalink  |  Comments (0)
Categories:  NatCast  
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PM Update: Still dreary but less rainy

Here we are, another springtime day with afternoon temperatures stuck in the 50s. I guess once summer finally kicks in we'll long for days like this. Additional rainfall today has generally been light, with the highest totals over eastern areas that got in on a bit of the coastal system's rain.

By Ian Livingston  | May 18, 2010; 3:15 PM ET  |  Permalink  |  Comments (4)
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2010 on track for warmest year on record

Consistent with what NASA scientists projected earlier this year, 2010 is currently on track to be the warmest year since global instrumental records began in the late 1800s. According to recently released data from NASA and the National Oceanic and Atmospheric Administration (NOAA), April 2010 was the warmest April on record, beating out 1998 for the title, and the period from January to April was the warmest such period on record.

By Andrew Freedman  | May 18, 2010; 11:00 AM ET  |  Permalink  |  Comments (63)
Categories:  Climate Change, Freedman, News & Notes, Science  
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Forecast: Another damp day, then trending drier

A complicated weather system continues to influence our area into tomorrow. First, a weakening area of low pressure toward the Ohio Valley transfers its energy to a low off the coast today. The coastal low should bring today's heaviest rains to the Eastern Shore, but we could still see some occasional showers and drizzle in the D.C. area. Then, a lingering upper-level area of low pressure likely keeps clouds around into a good part of tomorrow, before nicer weather Thursday and Friday and an uncertain weekend.

By Matt Rogers  | May 18, 2010; 8:15 AM ET  |  Permalink  |  Comments (10)
Categories:  Forecasts  
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PM Update: Steady rain to turn showery

Rain has been fairly widespread today if not terribly heavy. Most locations around the area have picked up about .15-.30" thus far, with some more to come today and then a little more tomorrow. Overall, good news for places that have missed out on recent hit-or-miss thunderstorm activity. Temperatures have struggled to get out of the 50s most spots this afternoon after reaching highs generally in the low 60s this morning.

By Ian Livingston  | May 17, 2010; 7:55 PM ET  |  Permalink  |  Comments (4)
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A beautiful and powerful storm

I've noticed the best time for viewing thunderstorms in our area is often in April and May. The muggy, humid conditions of mid-summer are not yet upon us and the atmosphere is often quite clear for viewing a towering thunderstorm, from the base of the storm to the anvil top. The storms on Friday were no exception to this rule. I took a sequence of shots in Oakton and Fairfax that reveal the structure of a severe thunderstorm as it moved rapidly from west to east. Large hail and briefly gusty winds accompanied Friday's storms. The hail was large enough in some areas to dent cars.

By Kevin Ambrose  | May 17, 2010; 11:00 AM ET  |  Permalink  |  Comments (3)
Categories:  Photography  
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Forecast: Murky Monday with cool rain

If you're one who believes meteorologists should apologize for bad weather, then you'll most certainly be demanding an apology for today. So with that, I'm terribly sorry you'll have to contend with such a damp and dreary Monday. The real blame, though, should fall on a low-pressure area being carried slowly along the southern branch of the jet stream. That means cool and rainy weather today, with lingering clouds and shower chances into Wednesday.

By Matt Rogers  | May 17, 2010; 10:00 AM ET  |  Permalink  |  Comments (22)
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Forecast: Ready for a rainy, cool Monday?

Yesterday was the jewel of this weekend but today won't exactly be a lump of coal. Highs in the low 70s are nothing to sneeze at even with building clouds. Should be a perfectly fine day for the last day of the Joint Service Open House and Air Show at Andrews Air Force Base. If you have anything to do outside, I'd get it done today. Rain is a good bet Monday into Tuesday -- maybe near or over an inch of it -- and shower chances could extend into midweek.

By Brian Jackson  | May 16, 2010; 4:35 PM ET  |  Permalink  |  Comments (7)
Categories:  Forecasts  
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