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Posted at 2:05 PM ET, 08/28/2009

Forecast: Unsettled, But Not Danny's Fault

By Camden Walker

Cooler with daily shower/storm threats through weekend

* Flash Flood Watch Thru Tonight for Metro Area & North (Map) *
* Outside Now? Radar, Temps & More: Weather Wall | SkinsCast *
* Is T.S. Danny a Threat to U.S. Coast? | Hurricane Tracking Center *
* New! Get CWG's Express Forecast by E-mail: Sign Me Up *


Today: Mostly cloudy. Showers and storms. Upper 70s to low 80s. | Tonight: Scattered showers and storms. Mid-60s to near 70. | Tomorrow: Partly sunny. Showers/storms? Low-to-mid 80s. | Sunday: Partly sunny. P.M. showers/storms? Low-to-mid 80s. | A Look Ahead | Danny & The Beaches


A dry streak may be in the offing next week. But until then, expect daily chances for showers and storms through the weekend, and highs mainly in the upper 70s to mid-80s. With the exception of the Eastern Shore, our rain chances around here will be more connected with the usual low-pressure areas and cold fronts moving in from the west, rather than with Tropical Storm Danny, the center of which is still expected to track well east.

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 (Friday): Mostly cloudy. Areas of showers and thunderstorms with heavy downpours are possible throughout the day. Morning activity may be isolated in nature, with increased coverage likely in the afternoon and evening. Highs in the upper 70s to low 80s and quite humid, courtesy a light onshore breeze from the east/southeast. Confidence: Medium

Probability: 40%
Coverage: Isolated-Scattered

Tonight: Showers and a few storms are likely to be scattered about the area. The humid air should prevent lows from dipping much past the mid-60s to near 70. Confidence: Medium

Will rain ruin the weekend? Keep reading...

Tomorrow (Saturday): As Danny passes well to the east, partly sunny skies get us a bit warmer with highs in the low-to-mid-80s. Still, we hold onto a chance of some isolated or scattered showers and storms. About a 50% chance that rain dampens your outdoor activity at some point. We stay on the humid side, too. Confidence: Low-Medium

Tomorrow Night: Shower and storm chances could linger into Saturday night. Lows again in the mid-60s to near 70. Confidence: Low-Medium

Sunday: Looks like a mix of sun and clouds and less humid. So highs in the low-to-mid 80s should feel nice. A front could be stalled out close enough to the south and east to give us a chance (about 40%) of some showers and storms in the afternoon or evening. Confidence: Medium


A partly cloudy end to our weekend on Sunday night with maybe an isolated shower or storm overnight and lows in the low-to-mid 60s. Confidence: Medium

Assuming that front stays far enough south and east, Monday and Tuesday should be partly to possibly mostly sunny with low humidity and highs in the mid-70s to low 80s. Nothing more than an isolated storm, unless that front tries to move back toward us. Confidence: Medium


The Maryland and Delaware beaches could just miss, or could get grazed, by the western edge of Tropical Storm Danny's rains and some gusty breezes Friday night and early Saturday. Either way, at least at this juncture, Danny does not seem to be a reason to cancel any vacation plans to the Eastern Shore, and improving conditions are expected by Saturday afternoon.

Further south, a Tropical Storm Watch is posted for the North Carolina coast, including the Outer Banks. Chances are higher down there for some rain squalls and stronger winds, though still probably below tropical storm strength (39 mph or higher), later today into early tomorrow. To the north, significant winds and rain threaten the New England coast, including the Boston Area and Cape Cod, through the day Saturday.

Watch out for dangerous surf and rip currents up and down the East Coast today into tomorrow. -Dan Stillman

By Camden Walker  | August 28, 2009; 2:05 PM ET
Categories:  Forecasts  
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Next: Is Tropical Storm Danny a Threat to U.S. Coast?


WTH was that last night around 10pm?

Out here in Ashburn, we had an incredible storm. Easily our worst storm of the year. The winds were so high, that it was close to severe status. Horrific lightning, very heavy downpour. Lasted about 45 minutes.

We apparently had a power surge as well as one of our outlets is shot.

I saw nothing in any forecast here or TV about storms of this magnitude so I was quite surprised.

Posted by: ThinkSpring | August 28, 2009 6:24 AM | Report abuse

ThinkSpring, I second your comment. It hit us in Northern Montgomery County a little later, around midnight. The amount of lightning is something I haven't seen in a long time. I too am still trying to find the final breaker outlet, or more likely I will be replacing one today. (All of them tripped off last night, huge power flux after a couple of close strikes.) None of the NWS alerts during the storm addressed the lightning, which was the story. Lots of rain, too, but the lightning. Wow.

Posted by: dprats21 | August 28, 2009 7:03 AM | Report abuse

Incredible rainfall and thunder here in University Park, MD between 0100-0330. I can't believe we didn't lose power.

Posted by: PGCist | August 28, 2009 7:21 AM | Report abuse

Danny = pathetic

Posted by: Ian-CapitalWeatherGang | August 28, 2009 8:25 AM | Report abuse

Forecast tomorrow for Berryville area? Thinking about going out to Keepstone Farm for Dog Days in August.


Posted by: omarthetentmaker | August 28, 2009 8:25 AM | Report abuse

Re: Lightning. It's pretty hard to say which storms are going to have more than others. Even on one day you can have a storm that has a ton and other that have little. Whenever storms are in the forecast you should prepare for plenty of lightning whether or not it happens.

Posted by: Ian-CapitalWeatherGang | August 28, 2009 8:41 AM | Report abuse

Agree with Ian. Lightning is not easy to predict. Any time thunderstorms are in the forecast, which they were (at least in our forecast) there's the potential for some to have a lot of lightning.

Posted by: CapitalWeatherGang | August 28, 2009 8:57 AM | Report abuse

Ian - I hear ya, but this was more than just lightning. The winds were strong enough to move my 60 lb deck umbrella stand a foot which is borderline severe in my book. Plus, torrential rains. I didn't see any mention of these as a possibility.

Posted by: ThinkSpring | August 28, 2009 9:02 AM | Report abuse

Big storm coming through Dulles area last night. Very impressivie winds, lightning and torrential rain. Luckily power stayed on. Total rainfall in about one hour 1.5 inch.

Posted by: LoudounGeek | August 28, 2009 9:02 AM | Report abuse

Danny = pathetic


Posted by: Axel2 | August 28, 2009 9:31 AM | Report abuse

I kept waiting for last night's storm to hit us, but it stayed to far to the north. Lightning was impressive, though.

We sure could use some rain this weekend, I wouldn't have minded a little of Danny ... ;)

Posted by: weathergrrl | August 28, 2009 9:35 AM | Report abuse

Electrical outlet problem located. Apparently, the rain was so heavy and windblown that it got into 2 of the outside outlets that are downstream from my GFI outlet in the garage, causing it to trip and not reset. Just gonna have to wait til the outlets dry out now for the problem to fix itself. (And yes, they were covered, but the rain got in behind the cover somehow. Like I said earlier, fierce storm. First time that's happened in this house.

Posted by: ThinkSpring | August 28, 2009 10:06 AM | Report abuse

How much rain is possible by Sunday?

Posted by: steske | August 28, 2009 10:45 AM | Report abuse

Axel2, the tropical storm -- Danny -- is pathetic. Fairly self explanatory I think.

Posted by: Ian-CapitalWeatherGang | August 28, 2009 10:57 AM | Report abuse

Rain headed toward downtown DC for just after lunch.. Go eat now, downtown workers!! :)

Posted by: Camden-CapitalWeatherGang | August 28, 2009 11:55 AM | Report abuse

What's with all this thunderstorm/flash-flood stuff??? IT'S JUST TOO DARNED CLOUDY HERE for that type of weather, though I do hear a few rumbles outside. More likely, we get a good inch and a half of soaking rain, though it's just too dry around Baileys Crossroads for any serious flooding. We could see some good rains here over the next 36 hours, but I'm rather skeptical about this major deluge stuff.

Posted by: Bombo47jea | August 28, 2009 12:05 PM | Report abuse

Nice big wet thunderstorm coming through Tysons Corner now. Hope it passes before I ride my bike home later this afternoon...

Posted by: jimfergusonj | August 28, 2009 12:40 PM | Report abuse

Rain in Bethesda now, after some thunder and darkening clouds.

Posted by: Murre | August 28, 2009 12:50 PM | Report abuse

Wow. I live between Mt Vernon and Alexandria. We have had 4.5 inches of rain in an hour and a half. Two 8' sections of double sided wooden fence were literally blown out by the rushing water on either side of the yard. I have never see anything like it. One of the 8' panels was carried maybe twelve feet and is now wedged in against a tree. Wow.

Posted by: Etta- | August 28, 2009 12:55 PM | Report abuse

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