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Posted at 5:00 AM ET, 05/14/2009

Forecast: Warm, Humid and Thundershowery

By Josh Larson

Unsettled and, at times, wet through the weekend

* Mother's Day Photography | Later: Challenges of Rainy Day Parenting *


Today: Mostly cloudy; milder. Thundershowers? Upper 70s. | Tonight: Mostly cloudy; thundershowers. Low 60s. | Tomorrow: Mostly cloudy. Thundershowers? Near 80. | Tomorrow Night: Mostly cloudy. Thundershowers? Low 60s. | A Look Ahead


Just in time for the end of the workweek and the weekend our dry weather will come to an end courtesy an approaching cold front. This front will stall close enough to the area (at least the third weekend in a row with a similar setup) to allow for scattered showers and thunderstorms today straight through the duration of the weekend. Bottom line: bank on periodic showers and thunderstorms accompanied by warm and, at times, downright humid conditions, right up, back to work Monday. Figures, no?

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

Today (Thursday): You'll wake up to mostly cloudy skies and perhaps a few sprinkles this morning. Despite the predominately cloudy conditions, winds from the southwest of 15-20 mph will help push temperatures into the upper 70s, along with increasing humidity levels, as the day wears on. By late afternoon into early evening scattered showers and thunderstorms will develop (50% chance). Confidence: Medium

Tonight: It will be cloudy and breezy tonight with scattered showers and thunderstorms -- some of which will be capable of producing heavy rain -- especially during the overnight period. Expect mild overnight lows in the low-to-mid 60s. Confidence: Medium

Keep reading for the unsettled forecast through early next week...

Tomorrow (Friday): Mostly cloudy skies will remain with us on Friday as well as 50/50 chance for scattered showers and thunderstorms, especially from the mid-afternoon hours on. Highs will be near 80, replete with the first truly uncomfortable humidity levels of the season (as sticky dew points rise to around 70 degrees). Confidence: Medium-High

Tomorrow Night: Mostly cloudy skies and the continued (40%) chance for scattered showers and thunderstorms linger into the evening and overnight hours Friday night with low temperatures eventually settling in the low 60s. Confidence: Medium


Gird yourself for yet more of the same on Saturday. I'm expecting mostly cloudy skies with the continued -- 50/50 -- chance for scattered showers and thunderstorms, primarily during the afternoon and evening hours. Uncomfortably high humidity levels will accompany afternoon highs in the low 80s. As the aforementioned cold front finally tries to push through the area, we stand the chance for possibly heavy rainfall Saturday night, with lows dropping to near 60. Confidence: Medium

I'm afraid we, yet again, hang onto mostly cloudy skies and a good chance for scattered showers and thunderstorms on Sunday, but as the cold front pushes south of the area, we'll see much cooler highs only in the mid 60s -- nearly 20 degrees cooler than Saturday's high temperatures. It will, likewise, be noticeably cooler Sunday night with lows dropping to the upper 40s. Confidence: Low

The outlook for return-to-work Monday is...drumroll, please...partly to mostly sunny skies and D-R-Y weather (probably, but we'll need to watch some moisture to the south). Murphy, you can take your law -- we don't want it. Afternoon highs will again be on the cool side for mid-May; I'm thinking mid-to-upper 60s. Confidence: Low-Medium

By Josh Larson  | May 14, 2009; 5:00 AM ET
Categories:  Forecasts  
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Next: For Parents, Weekend Rain is One Big Pain


Oh joy!

Posted by: weathergrrl | May 14, 2009 7:50 AM | Report abuse

Here's hoping those horsies up at Pimlico don't have to run in the same slop they did a few weekends ago at the Derby!

Posted by: finnellb1 | May 14, 2009 9:05 AM | Report abuse

So much for it not having low ceilings and low visability. 1500 ft celings and 4 miles vis equals no flying.

Posted by: chris_soule | May 14, 2009 10:30 AM | Report abuse

I think you should just call for significant rain Fri/Sat/Sun. This year, when there is a "slight chance" it most definitely rains 1/4 to 1/2 inch. With a 50/50 chance, I'm thinking one inch on each of the three days. Gully washer time.

Posted by: jojo2008 | May 14, 2009 12:13 PM | Report abuse

Those pulling for a Triple Crown winner this year may PREFER a sloppy track. Mine That Bird is not known as a sprinter, and may actually perform better at the mile-and-a-half Belmont than at the shorter Preakness. [Longshot to Triple Crown would be quite a story, though, and great material for Hollywood! This is the stuff of "Seabiscuit".]

My dance card is rather light this weekend, so the rain impacts me mainly tomorrow night, though there is a swing dance Saturday night downtown in the 1300 block of K St. No dance is scheduled in Glen Echo this Saturday.

The bigger dance issue comes Memorial Day weekend, and already the Canadian GEM is threatening a "tropical system" for the Southern Atlantic region. NWS isn't buying into this quite yet, though a named SUBTROPICAL system forming near the Florida Keys a week from today and tracking northeastward through Florida and just off the Carolinas doesn't seem completely out of the question for Memorial Day weekend. Let's just hope it doesn't turn the three-day weekend into a soggy mess around here. There is a dance of some type scheduled every night from May 22-26.

One final sports aside. It's too bad the Caps lost so badly. Now we'll never know how they would have played against the Bruins/Hurricanes or Blackhawks/Redwings. It was setting up perfectly for a Washington Stanley Cup and now the Penguins RUINED it. The 'Pens' are getting worse than even the "rain dance crowd"!

Posted by: Bombo47jea | May 14, 2009 12:38 PM | Report abuse

@jojo2008, I could see 1-2" falling from now through Sunday, but the reason I use chances and the word "scattered" is because I don't believe it to be a full-on washout so much as periods or waves of showers and thunderstorms. But you're right, a good deal of rain my fall in total.

Posted by: Josh-CapitalWeatherGang | May 14, 2009 1:03 PM | Report abuse

I'm not sure which I'd pick, weekend rain or weekday rain because rain sure can mess up the commute to work. Sunshine can cause delays as well for those coming from the west. Overcast conditions seem to be best, but there can still be jams.

Posted by: spgass1 | May 14, 2009 1:07 PM | Report abuse

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