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Posted at 5:00 AM ET, 07/11/2009

Forecast: Stickier Saturday with Storms at Night

By Jason Samenow

Low humidity returns Sunday...

* D.C. A Summer Sweet Spot, So Far | El Niño = Less Hurricanes? *
* Current Radar, Temps, and More: Weather Wall *


Today: Partly sunny and somewhat humid. Mid-to-upper 80s. | Tonight: Thunderstorms likely. 62-66. | Tomorrow: Partly sunny, not as humid. Mid-80s A Look Ahead


For at least a day, it will feel like and sound like summer in D.C. Humidity will make a brief, even if understated appearance today before thunderstorms roar through the region tonight. Tomorrow, drier air returns though it may be gently displaced by some modestly moist air Monday. Then another batch of delightfully dry air - the kind we've enjoyed much of July -- returns Tuesday.

Radar: Latest regional radar loop shows movement of precipitation over past two hours. Powered by HAMweather. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Today (Saturday): A breeze from the south (at 10-15 mph) supplies a touch of humidity (dew points in the low-to-mid 60s) but it could be a lot worse. For much of the day, we'll have partly cloudy skies. An isolated shower cannot be totally ruled out (20% chance) in the afternoon, especially west of the District. High temperature will reach the mid-to-upper 80s. Confidence: Medium-High

Tonight: Showers and thunderstorms are likely (60% chance), especially after 8 p.m. and before 2 a.m. This is not the best news for the Billy Joel/Elton John concert at Nationals Park. Said storms may contain gusty winds and dump some locally heavy rain. Overnight lows will generally be in the mid-60s. Confidence: Medium-High

Keep reading for the forecast for tomorrow and into early next week...

Tomorrow (Sunday): Following the cold front triggering the storms Saturday night, drier winds from the northwest (at around 10 mph) will arrive Sunday. This will result in lower humidity levels (dew points near 60) and little to no chance of rain. Partly sunny skies should boost high temperature towards the mid-80s. Confidence: Medium-High

Tomorrow Night: Skies will be partly cloudy with lows from the low 60s in the cooler suburbs to the mid-to-upper 60s downtown. Winds will be light. Confidence: Medium-High


A weak wave of low pressure passes by to our south Monday , possibly (30% chance) spreading a few showers through the region. We should have more clouds than sun, with highs in the low-to-mid 80s. Partly cloudy at night, with lows in the 60s. Confidence: Medium

High pressure builds in from the northwest behind Monday's low on Tuesday, sending refreshing air towards the region. Lots of sunshine will carry highs back up into the mid-80s, but humidity will be once again low (dew points in the 50s). Confidence: Medium-High

By Jason Samenow  | July 11, 2009; 5:00 AM ET
Categories:  Forecasts  
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Next: Thunderstorms to Rumble Thru Region This P.M.


So I might, maybe, be able to put a few hours into taking the boat out on the river, without sweating to death? Here's hoping!

Posted by: --sg | July 11, 2009 6:34 AM | Report abuse

Go take the boat out now-- go go go :)

Posted by: Camden-CapitalWeatherGang | July 11, 2009 8:15 AM | Report abuse

Hoping the rain stays to the south - planning on meeting some friends for the Keys game in Frederick. Should we have alternate plans?

Posted by: map408 | July 11, 2009 9:48 AM | Report abuse

Great dance last night at the Elks Lodge... fine weather, no weather issues!!!

Tonight's a different matter...big swing dance at the Spanish Ballroom, and I'm REALLY UPSET over the threat of dinnertime lightning while trying to get myself to Dunn Loring between 6:30 and 8 PM. It would be FAR BETTER not to schedule these thunderstorms for a huge dance and concert night like tonight!!!

Monday night @ Chevy Chase is also storm-impacted...though the big threat there is Metro's continued insistence on construction tracking delays over the Red Line...hard to believe they are now scheduling these continuing shenanigans for the NEXT FOUR YEARS starting sometime next year!!!

Posted by: Bombo47jea | July 11, 2009 11:05 AM | Report abuse

Speaking of Metro...I hear they've got these trackwork-delay shenanigans ongoing this weekend on every single line but the Green Line, and it's not even part of the "big" construction project they're talking about! May not be able to get to Dunn Loring by 7:30 even if I escape the lightning. They ought to do something about GM John Catoe; all he gives us is higher fares for crummier service. And please set up dedicated funding [by taxing the car-freaks!] so we can enjoy our weekends without this continual service-cutback whining.

Posted by: Bombo47jea | July 11, 2009 11:16 AM | Report abuse

Unless these /showersstorms headed out of the mtns start weakening soon looks like they'll make it in this afternoon.

Posted by: Ian-CapitalWeatherGang | July 11, 2009 2:00 PM | Report abuse

I don't see much on the radar heading our way tonight, though it looks like Harrisburg is getting hammered.

Posted by: KBurchfiel | July 11, 2009 8:43 PM | Report abuse

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