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November 30, 2010

Rain, wind and "isolated tornadoes"

You've been warned. Exactly two weeks ago the National Weather Service was advising us of the possibility of damaging winds across Central Maryland as a strong cold front approached from the west. By midnight the forecasters were alerting us to watch for the danger of severe thunderstorms, and by 1 a.m. the watch had become a warning.

Weather radioA half-hour later an EF-1 tornado and damaging straight-line winds were ripping up roofs and trees along a swath of Northeast Baltimore and Parkville. Trees fell from Virginia to the Gunpowder River.

Today, with a very similar situation  developing across the eastern United States, forecasters at the Baltimore-Washington Forecast Office have issued a Hazardous Weather Outlook, advising us of the approach of a strong cold front, with the likelihood of heavy rain overnight tonight, with flash flooding, and thunderstorms along and east of the I-95 corridor "capable of producing damaging wind gusts and isolated tornadoes."

If you don't think this applies to you, check with the residents of Dutch Village and Mt. Pleasant Heights, if they've managed to get back into their homes yet. If you don't already have a NOAA Weather Radio, this would be a good day to get yourself to your local electronics store and buy one. They're cheap, and they will wake you up if the weather service issues a severe storm or tornado alert for your area.

The forecast calls for some more light rain today, becoming heavier overnight and into Wednesday morning with increasing risk of thunderstorms. Winds of 16-21 mph are likely, with gusts to 37. New rain could reach three-quarters of an inch by morning, with another inch possible Wednesday.

UPDATE, 3 p.m.: The NWS has added a Wind Advisory, in effect from 10 p.m. Tuesday night until 11 a.m. Wednesday morning. Wind gusts of 45 to 50 mph are forecast. Earlier post resumes below:

A Flash Flood Watch has been posted for Central Maryland from late tonight through Wednesday afternoon as small streams and creeks threaten to rise out of their banks in heavy rain.

There is also a Coastal Flood Watch up from Harford County to St. Mary's County, as southeast winds keep the Chesapeake Bay bottled up and drive high water into the creeks. High tides could run 2 to 3 feet above normal tonight through Wednesday afternoon. Here are some high tide times for the area:

HAVRE DE GRACE...5:00 AM AND 6:02 PM...
BOWLEY BAR...2:38 AM AND 3:40 PM...

(SUN PHOTO: Frank Roylance, my weather radio)

Posted by Frank Roylance at 10:24 AM | | 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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