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Posted at 05:00 AM ET, 10/28/2012

D.C. area forecast: Sandy looms large; biggest impact Monday into Tuesday

5:45 p.m. update: For the latest on Hurricane Sandy and Washington, D.C., please see this post: Hurricane Sandy and Washington, D.C.: Detailed storm timeline, maps, and frequent questions

*** High Wind Warning | Flood Watch | Sandy FAQs | How to prepare ***

EXPRESS FORECAST

Today: Breezy and cloudy with showers possible. Near 60. | Tonight: Increasing rain an wind. Upper 40s to low 50s. | Tomorrow: Periods of heavy rain and winds gusting 45-60 mph. Near 50 to low 50s. | A Look Ahead | Get Express Forecast by E-mail

TODAY'S DAILY DIGIT

A somewhat subjective rating of the day’s weather, on a scale of 0 to 10


Nothing severe, just cloudy with breezy showers possible. Not so nice, but nice enough to allow for final storm preparations. Get the Digit on Twitter | Discuss on Facebook

FORECAST IN DETAIL


An in­cred­ibly large Sandy continues to creep closer to its seemingly inevitable impact, but in the meantime we’ll squeeze in one more relatively calm day. If you have any last-minute storm prep to do, get it done TODAY. A noticeable breeze and possible light showers today should be your warning to get ready to hunker down. Starting tomorrow, Sandy is likely to batter the area with wind and rain for an extended period of time.

Today (Sunday): Breezy showers are possible today. It’s probably wetter east of I-95 than west. Heavier rain likely moves into the Eastern Shore during the afternoon. Winds from the north increase to near 15-20 mph with gusts around 25-30 mph. Those cool winds and cloudy skies keep temperatures cooler than we’ve seen lately with highs only near 60. Confidence: Medium-High

Tonight: Steadier rain becomes likely overnight and should get heavier toward morning. Winds from the north pick up in strength as well, as gusts may reach 30-35 mph with sustained winds near 15-25 mph. Those north winds put a chill in the air, with overnight lows in the upper 40s to low 50s. Confidence: Medium

Keep checking Capital Weather Gang for the latest on the storm. Keep reading here for the forecast through midweek...

Tomorrow (Monday): The center of the storm is still well out to sea, but out ahead of it, our weather takes a marked turn for the worse. Periods of heavy rain are expected throughout the day and winds continue to increase. During the morning, sustained winds increase to 25-30 mph with gusts near 45 mph, and during the afternoon they step up to 35-40 mph sustained with gusts near 60 mph. Widespread power outages could begin to occur, especially later in the day, as winds topple trees in the rain-soaked ground. And severe flooding is expected at the Maryland and Delaware beaches. Temperatures through the day are raw and cool, mainly near 50 to the low 50s under overcast skies. Confidence: Medium

Tomorrow night: Bouts of heavy rain and high winds continue overnight as the center of Sandy approaches the New Jersey coastline. Winds may increase even more, to 35-50 mph sustained with gusts up to around 65 mph. Low-lying areas and areas with poor drainage may begin to see significant flooding. Don’t plan to travel unless it’s an emergency due to the risk of flooding and falling trees and limbs. Rainfall accumulations of 2-4”+ are likely by morning. Confidence: Medium

A LOOK AHEAD

As Tuesday dawns, the center of the storm is forecast to be inland, just to the north of our area. That keeps us in the zone for more steady rain and driving winds. Accumulating snow will likely be falling in the mountains of West Virginia and Western Maryland as well. Some flakes may even be seen in the far west and northwest suburbs, for example in Loudoun and Frederick counties especially at elevations above 1,000 feet, but no accumulation is expected. Highs probably don’t make it out of the 40s as cold air continues to wrap into the storm. Another 1-2”+ of rain is possible and winds stay strong, from the northwest at 25-35 mph, gusting to 50 mph. Confidence:Medium

The storm should slowly begin to weaken Tuesday night, but that doesn’t mean to let your guard down. Brief periods of heavy rain are still possible but should become more intermittent. Winds remain high with gusts of 35-45 mph still possible. Total rainfall looks to be in the 3-7” range, but locally higher totals are possible especially northeast of town, and locally lower totals are possible especially southwest of the city. Confidence: Low-Medium

By Wednesday the weakening storm starts to pull away from our area and the clean up begins. Snow is likely in the mountains of West Virginia, but for our area our rain chances decrease to around 50%. It’s still mostly cloudy and very cool with highs near 50 to the mid-50s. Confidence: Low-Medium

By  |  05:00 AM ET, 10/28/2012

Categories:  Forecasts

 
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