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Capital Weather Gang: July 25, 2010 - July 31, 2010

July warmth record tied at Washington, D.C.

83.1 average temperature warmest of any month on record * How's tomorrow looking? Full Forecast | NatCast * Regional temperature departures from July 1 through July 30 show most of the area well above average. Image courtesy: High Plains Regional Climate Center. Though still unofficial, it appears that D.C. has...

By Ian Livingston  | July 31, 2010; 4:00 PM ET  |  Permalink  |  Comments (15)
Categories:  Local Climate  
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Forecast: Satisfactory Saturday, showery Sunday

If there's one really good thing to say about this weekend, it's that we won't have to contend with any extreme heat. We may, however, have to deal with showers and thunderstorms -- mainly Sunday. The other negative is that our reprieve from the humidity only lasts through this afternoon. Tonight, tomorrow and well into the next week, characteristic August humidity will assert itself - right on schedule.

By Jason Samenow  | July 31, 2010; 5:00 AM ET  |  Permalink  |  Comments (10)
Categories:  Forecasts  
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NatCast: Feeling good for the Phillies

* Our Full Forecast | Weather Wall | Nationals Journal * Phillies at NationalsSaturday July 31, 7:05 p.m., Nationals Stadium First Pitch9th InningWeatherChance of RainLow 80sUpper 70sPartly cloudy15%I'm expecting a pleasant evening at the Park. I can't totally rule out a thunderstorm, but any activity should hold off until after...

By Jason Samenow  | July 31, 2010; 5:00 AM ET  |  Permalink  |  Comments (1)
Categories:  NatCast  
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PM Update: Some payback for all the heat

After all the heat we've gone through recently, I think we deserve more days like this one. Just a few clouds are floating by in an otherwise blue sky. High temperatures generally in the mid-80s are actually a few degrees below average in most spots, and humidity levels are delightful. This time yesterday we were still sitting in low 70s dew points. Today they have fallen about 20 degrees -- enough to not even think about a "stickiness factor" (unless reading this).

By Ian Livingston  | July 30, 2010; 3:15 PM ET  |  Permalink  |  Comments (6)
Categories:  Forecasts  
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Weather with 'attitude' - that's the point (sort of)

Our weather gang here was subject to a bit of criticism recently.

By Dan Stillman  | July 30, 2010; 10:30 AM ET  |  Permalink  |  Comments (32)
Categories:  Capital Weather Gang, Media  
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Forecast: Fantastic Friday & semi-sweet Saturday

These seasonable, average high temperatures in the upper 80s the next couple days? They will feel downright awesome. I am extremely excited, I bet you are too. We have slowly increasing chances of showers on Saturday evening into Sunday evening, and probably Monday too. By the middle of next week, we could be back into our hot regime. So enjoy it while you can!

By Camden Walker  | July 30, 2010; 5:00 AM ET  |  Permalink  |  Comments (14)
Categories:  Forecasts  
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Natcast: Nice, dry, comfortable!

* Our Full Forecast | Weather Wall | Nationals Journal * Phillies at NationalsFriday July 30, 7:05 p.m., Nationals Stadium First Pitch9th InningWeatherChance of RainLow 80sMid-70sDry & comfortable0%Dress for comfortable summer weather & enjoy! No chance of storms. Nearly perfect evening.   NatCast appears on the day of every Nationals...

By Camden Walker  | July 30, 2010; 5:00 AM ET  |  Permalink  |  Comments (1)
Categories:  NatCast  
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PM Update: Clearing and drying this evening

Pretty nice Fri and Sat; Rain threat after? * Severe Thunderstorm Watch canceled * * Record snow not due to global warming | A colorful D.C. sunset * * Outside now? Radar, lightning, temps & more: Weather Wall * Temperatures that quickly rose into the low-and-mid 90s have been knocked...

By Ian Livingston  | July 29, 2010; 5:30 PM ET  |  Permalink  |  Comments (11)
Categories:  Forecasts  
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Strong thunderstorms slowly moving southeast

Heavy rain and isolated damaging wind main threats * Severe Thunderstorm Watch until 7 p.m. * * Friendship Heights Metro Station closed due to power outage * * What about after the storms? See our full forecast * 2:50 p.m. update: Slow-moving storms with lots of lightning and heavy rain...

By Ian Livingston  | July 29, 2010; 2:50 PM ET  |  Permalink  |  Comments (36)
Categories:  Alerts  
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D.C. record snow in 2010 not due to global warming

A new study by a team of scientists at Columbia University's Lamont-Doherty Earth Observatory argues that global warming was not involved. Rather, the study finds the anomalous winter was primarily the result of convergence of an exceptionally strong El Nino and unusually strong negative phase of North Atlantic Oscillation (NAO).

By Steve Tracton  | July 29, 2010; 10:30 AM ET  |  Permalink  |  Comments (34)
Categories:  Climate Change, Science, Snowmageddon, Tracton, Winter Storms  
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Forecast: Storms today no match for last Sunday's

The storms today should be fairly benign and they mark the leading edge of one of the driest air masses we have seen in a long time. The break in the heat and humidity make for a great first half of the weekend. Unfortunately, showers (not storms) should return on Sunday so get the outdoor activities in on Friday and Saturday. Below normal temperatures in July have been limited to the first 3 days of the month. Glad to say good bye to July!

By David Streit  | July 29, 2010; 5:00 AM ET  |  Permalink  |  Comments (12)
Categories:  Forecasts  
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NatCast: A rain delay is likely but not a rainout

* Our Full Forecast | Weather Wall | Nationals Journal * Nationals vs. BravesThursday July 29, 12:35 p.m., Nationals Park First Pitch9th InningWeatherChance of RainNear 90Low 80sThundery60%This is a forecast I would be happy to have bust! However, a line of thundershowers is very possible during the game. With a...

By David Streit  | July 29, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
Categories:  NatCast  
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PM Update: Heat's back for short stay

Our friend, the 90+ day, has returned! Ok, maybe it's not that exciting. Partly-to-mostly sunny skies during the day and a south wind pumping in high humidity have reminded us that summer still has a way to go before it's over. Fortunately, this stretch of higher heat will be relatively short lived and includes some cooling rain chances.

By Ian Livingston  | July 28, 2010; 3:30 PM ET  |  Permalink  |  Comments (5)
Categories:  Forecasts  
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Last week: A colorful DC sunset instead of storms

This has been a fairly boring D.C. storm season if you're interested in photography (remember 2008?), at least until recently when much more frequent showers and storms visited the area.

By Ian Livingston  | July 28, 2010; 1:30 PM ET  |  Permalink  |  Comments (3)
Categories:  Photography  
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Were you caught off-guard by Sunday's storms?

For those outside and/or away from television or digital communication devices, the combination of the storm's swift arrival, power and fury was undoubtedly surprising, if not startling.

By Jason Samenow  | July 28, 2010; 10:45 AM ET  |  Permalink  |  Comments (26)
Categories:  Capital Weather Gang, Thunderstorms  
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Forecast: Steaminess returns and thunder chances

After the briefest respite from the heat and humidity, we're destined to return to the steamer. Humidity and heat build once again today as the mid-90s are back. Luckily, this time it won't last nearly as long before another cold front brings thunderstorms and cooling rain to the area, ushering cooler and drier air once again. Our upcoming weekend looks promising to start but a tricky disturbance may bring some troubles later on Saturday.

By Brian Jackson  | July 28, 2010; 5:00 AM ET  |  Permalink  |  Comments (8)
Categories:  Forecasts  
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NatCast: Braves bring their weather on the road

* Our Full Forecast | Weather Wall | Nationals Journal * Nationals vs. BravesWednesday, July 28, 7:05 p.m., Nationals Park First Pitch9th InningWeatherChance of RainLow 90sUpper 80sMostly cloudy30%It will feel like a typical night in the deep south. A quick shower or thunderstorm may briefly disrupt the flow, but expect...

By Brian Jackson  | July 28, 2010; 5:00 AM ET  |  Permalink  |  Comments (0)
Categories:  NatCast  
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PM Update: Mini heat blast arrives tomorrow

Cooler air inbound for late-week and weekend * An inside view of Sunday's severe weather | Storm clouds at sunset * * Outside now? Radar, lightning, temps & more: Weather Wall * A fair amount of cloudiness today has held temperatures in check, but humidity levels are back on the...

By Ian Livingston  | July 27, 2010; 3:25 PM ET  |  Permalink  |  Comments (3)
Categories:  Forecasts  
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An inside view of Sunday's severe weather

The severe thunderstorms that tore through the Washington metro area on Sunday afternoon were fueled by a combination of historically hot and oppressively humid weather, and ignited by a cold front barreling east-southeastward. They were not the strongest thunderstorms ever to affect the region - after all, there were no confirmed tornadoes - but they happened to barrel right through the heart of some of the most populated areas of Loudoun and Montgomery counties, as well as the District itself.

By Andrew Freedman  | July 27, 2010; 10:00 AM ET  |  Permalink  |  Comments (40)
Categories:  Freedman, High Winds, Recaps, Thunderstorms  
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Forecast: Remove from boil and then simmer

We were finally able to remove ourselves from the heat as yesterday saw the first day below 90-degrees in about two weeks. Unfortunately, we have a second course of humid heat here in the next few days, but do not expect as much of a scalding. A cold front arriving just in time for Friday and the weekend promises to be stronger than our last one, which means an entire weekend of 80s and low humidity. Bon Appetit!

By Matt Rogers  | July 27, 2010; 5:00 AM ET  |  Permalink  |  Comments (9)
Categories:  Forecasts  
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NatCast: Weather that's easy to brave

* Our Full Forecast | Weather Wall | Nationals Journal * updated at 9:30 a.m. Nationals vs. BravesToday, 7:05 p.m., Nationals Park First Pitch9th InningWeatherChance of Rain8780Low humidity = comfortable. 20%The odds look good that tonight will be a very pleasant weather experience. Can't rule out an isolated thundershower, but...

By Matt Rogers  | July 27, 2010; 5:00 AM ET  |  Permalink  |  Comments (4)
Categories:  NatCast  
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PM Update: Near average never felt so good

Wow, who knew near-average temperatures (89/71 at DCA) would feel so good? Readings in the upper 80s to near 90 this afternoon are combining with drier air to make it a rather pleasant day out there, especially considering what we just went through. Our heat wave, which at 12 days 90+ became the longest of the year yesterday, is threatening to end today.

By Ian Livingston  | July 26, 2010; 3:15 PM ET  |  Permalink  |  Comments (13)
Categories:  Forecasts  
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A week ago: thunderstorm clouds at sunset

The sky over the Washington area was alive with clouds and color during the evening of Monday, July 19. The setting sun produced shades of yellow and red light which glowed on the clouds above.

By Kevin Ambrose  | July 26, 2010; 12:00 PM ET  |  Permalink  |  Comments (5)
Categories:  Photography  
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Baltimore making 100-degree history

As we mentioned yesterday, BWI airport hit 100 - breaking the previous record of 99 from 1934. But more notable is the fact Baltimore reached 100 for the fifth time this month - the most ever 100-degree occurrences for any month in Baltimore in recorded history. And yesterday marked Baltimore's seventh 100 degree or higher day in 2010 - tying 1988 and 1930 for the most ever in a summer.

By Jason Samenow  | July 26, 2010; 11:00 AM ET  |  Permalink  |  Comments (4)
Categories:  Local Climate  
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Forecast: Heat breaks, but to briefly bounce back

You know it's been a painfully hot summer when we're calling a high of 90 today "relief". But it is what it is. At least, the humidity will be relatively low today into tomorrow. The all-too-familiar heat and humidity combination returns Wednesday and Thursday but it's my pleasure to inform you that we *may* see temperatures hold in the 80s Friday into the weekend.

By Jason Samenow  | July 26, 2010; 5:00 AM ET  |  Permalink  |  Comments (17)
Categories:  Forecasts  
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Whew! Storms move out, heat advisory canceled

What a day: record or near-record heat and then violent thunderstorms. Wind gusts between 55-70 mph were common. Thankfully, the thunderstorms and associated front bring cooler air in overnight -- but not sufficiently cool to assist the thousands without power. Lows will be 70-75 inside the beltway, with some upper 60s in the cooler suburbs. Tomorrow, we see full sunshine but much lower humidity as highs head up to around 90. That certainly beats 100.

By Jason Samenow  | July 25, 2010; 5:15 PM ET  |  Permalink  |  Comments (21)
Categories:  Updates  
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Severe thunderstorms sliding south

As an approaching cold front clashes with near record heat this afternoon, strong to severe thunderstorms are likely to develop. These storms will be capable of produce torrential rain, dangerous lightning, and damaging wind. To the northwest in WV, Pa., and Md., numerous reports of downed trees associated with the approaching line of storms have been logged by the National Weather Service.

By Jason Samenow  | July 25, 2010; 5:00 PM ET  |  Permalink  |  Comments (54)
Categories:  Thunderstorms, Updates  
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Forecast: Cold front late today signals break in heat

While we probably avoid the century mark today, we'll still have to deal with one more day of rather stifling conditions. This heat combined with an approaching cold front provides the ingredients for possible afternoon thunderstorms. Once they're through though, some more comfortable heat settles in for the first part of the week . Another front approaches by late Wednesday and will bring another threat of thunderstorms. So was anyone this desperate for shade yesterday?

By Brian Jackson  | July 25, 2010; 5:00 AM ET  |  Permalink  |  Comments (20)
Categories:  Forecasts  
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