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Posted at 6:40 PM ET, 08/29/2009

Forecast: A Few Evening Showers & Storms

By Jason Samenow

Diminished rain chances tomorrow, then cooler

* Outside Now? Radar, Temps & More: Weather Wall | Lightning Map *
* Feeling the Power of Hurricane-Force Winds | Year of Science *
* Where's Danny? Hurricane Tracking Center *


Today: Mostly cloudy, scattered showers and t'storms. 82-86. | Tonight: Chance of storms early, then partly cloudy. 65-70. | Tomorrow: Partly sunny, slight chance of mainly p.m. storms. 82-86. A Look Ahead | Get Express Forecast by E-mail


Rain is in the forecast both weekend days, but it will be dry more often than not. In fact, Sunday could be rain-free in many locations. Humidity, however, won't relent until Sunday night. Temperatures will be more or less seasonable, after a 19-day streak of above average temperatures ended yesterday.

Radar: Latest D.C. area 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): Showers are possible (40%) in the morning as an area of low pressure pulls away. A little sunshine should emerge some places - mainly in the afternoon -- though more showers and thunderstorms could (40% chance) fire up again as a cold front slowly approaches the area. Highs will generally be in the low-to-mid 80s. Confidence: Medium

Probability: 40%
Coverage: Scattered

Tonight: Any showers and thunderstorms will likely diminish during the evening, with partly cloudy skies overnight. Lows will fall to the mid-60s in the suburbs to around 70 downtown. Confidence: Medium-High

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

Tomorrow (Sunday): The good news is that rain chances are lower tomorrow, but we won't be able to totally shake them due to the proximity of a front, just to our east. Most of day will be dry, with storm chances - most likely in the late afternoon or evening -- only around 20-30%. It will be partly sunny and a little less humid, with highs in the mid-80s. Confidence: Medium-High

Tomorrow Night: Partly cloudy skies during the evening may become mostly cloudy by morning, as a wave of low pressure forms a long the front stalled to our east. Lows should range from near 60 in the cooler suburbs to the mid-60s downtown. Confidence: Medium


At one time, Monday and Tuesday looked so promising weather-wise. Refreshing, Canadian high pressure was to build in from the northwest, giving us dry (low humidity), sunny days and clear, cool nights. Unfortunately, there are now signs that the weekend's front may not push far enough offshore for us to be in the clear. Instead, waves of low pressure may move up the front, giving us a chance of rain -- especially Monday. Conditions may improve Tuesday though some showers can't be ruled out, especially east of town. Highs both days will be below average, in the 70s. Confidence: Low-Medium

By Jason Samenow  | August 29, 2009; 6:40 PM ET
Categories:  Forecasts  
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Next: Forecast: Cooler Weather on the Way


Still rather humid...Radar shows some showers in the area but what's left of Danny has apparently passed to our north...seems to be lots of lightning E of Long Island & S of Cape Cod...Danny has weakened to near-insignificance...tropical system now Hurricane Jimena is S of Mexican Riviera, could threaten La Paz/Cabo San Lucas on S tip of Baja.

Posted by: Bombo47jea | August 29, 2009 12:53 PM | Report abuse

Some storms firing up down to the south, west of Fredericksburg. Will have to see whether that area tries to build northward. Generally speaking, looks like the potential for isolated to scattered shower/storm activity in the metro area into at least early evening.

Posted by: Dan-CapitalWeatherGang | August 29, 2009 4:47 PM | Report abuse

Raining sans lightning in Takoma Park right now.

Posted by: Murre | August 29, 2009 7:50 PM | Report abuse

It's been a train of recurring downpours in the Bethesda/Rockville area. Looks like Baltimore got a good dose too. Now some action south of the Beltway and in the Manassas area. Meanwhile, downtown has gotten zilch.

Posted by: Dan-CapitalWeatherGang | August 29, 2009 9:50 PM | Report abuse

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