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May 27, 2010

Flash Flood Watch up as PM storms approach

The National Weather Service has posted a Flash Flood Watch for Baltimore, Washington and their suburban counties, beginning at 5 p.m. Thursday as an approaching cold front threatens the Thunderstorm Baltimoreregion with heavy, slow-moving thunderstorms.

UPDATE: The NWS has issued a Severe Thunderstorm Watch until 9 p.m. for all of Maryland between Allegany County and the Bay, plus the northern portions of the Eastern Shore.  

Storms could begin in the Baltimore region earlier this afternoon as the bay breeze picks up and moves over hotter air to the west. The more severe weather is likely late this afternoon as the cold front approaches. Those storms will be capable of producing strong winds and large hail, forecasters warned.

Worse, from a flooding standpoint, will be the slow movement of the storms, allowing heavy rain accumulations in some locations, especially in the Baltimore-Washington area. Hence, the flash flood worry. Rain totals of a half- to three-quarters of an inch are possible.

Behind the front things will calm down, although showers may continue off and on through the night and Friday, forecasters said. But the hot weather we've had for the past two days will ease. Highs Friday should hold in the low 70s, rising to the low 80s by Sunday.

Posted by Frank Roylance at 9:47 AM | | Comments (0)
Categories: Watches and warnings

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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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