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August 15, 2011

More showers and storms ahead

The barrage of showers and thunderstorms we've been seeing for the last couple of days seems likely to continue Monday and Tuesday. But forecasters at the National Weather Service expect the atmosphere will be drying out some, allowing the storms to diminish. Wednesday and Thursday should be mostly rain-free.

Coastal low Blame a low-pressure system that moved slowly out of the Ohio Valley over the weekend. The counter-clockwise spin around the low picked up moisture from an unusually warm Atlantic Ocean and sent a plume of moisture-laden air north. There it ran up onto the mid-Atlantic states, dropping heavy rains that added up totals equal to a month or two of normal precipitation in some spots.

The storm center is moving up the East Coast today, but very slowly. That will leave us to deal with some additional showers and storms this afternoon, tonight and Tuesday. Flash flooding, such as that which submerged cars on Patapsco Avenue and flooded basements in Cherry Hill this morning, also remains a possibility. A Flash Flood Watch is in effect for Baltimore and its suburbs until 8 p.m. Monday. 

But drier air will continue to move our way, gradually easing us toward a sunny, dry day on Wednesday, and again of Thursday. By then, the high pressure that follows this stormy low, will have moved east, putting us once agaion in the return flow, forecasters said. Heat and humidity will rise again, and rain chances will be back for late Thursday, Friday and Saturday.

Posted by Frank Roylance at 12:50 PM | | Comments (0)
Categories: Forecasts
        

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About Frank Roylance
This site is the Maryland Weather archive. The current Maryland Weather blog can be found here.
Frank Roylance is a reporter for The Baltimore Sun. He came to Baltimore from New Bedford, Mass. in 1980 to join the old Evening Sun. He moved to the morning Sun when the papers merged in 1992, and has spent most of his time since covering science, including astronomy and the weather. One of The Baltimore Sun's first online Web logs, the Weather Blog debuted in October 2004. In June 2006 Frank also began writing comments on local weather and stargazing for The Baltimore Sun's print Weather Page. Frank also answers readers’ weather queries for the newspaper and the blog. Frank Roylance retired in October 2011. Maryland Weather is now being updated by members of The Baltimore Sun staff
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