From the ABC 7 Weather team

Huge storm exits D.C., leaving big rainfall totals in Northeast

August 16, 2011 - 04:42 AM
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A mammoth of a rainmaker that's been stomping the Northeast since Friday is roaming north, allowing some pretty fine weather to creep back into the District.

Good riddance to bad weather. (GOES East 1 km Infrared Weather Satellite Image, Aug. 15, 9:30 p.m.)

By late Monday, a sucking whirlpool in the atmosphere that had vomited rain all over the Northeast since Friday was headed up the Delmarva peninsula, moistening the few remaining objects in the region (uncovered Grotto slices, maybe, or nesting brown-headed nuthatches?) that had somehow dodged the deluge.

High pressure will seep back into the vacuum this system left behind, meaning the next couple days in Virginia, Maryland and the District will be much less eventful. There's the possibility that the atmospheric memory of this storm could trigger a few isolated showers in the afternoon, but it will likely be a fair day with below-average, low-80s temperatures that don't cause plants and people to wilt. Humidity and a chance for storms return Thursday and Friday as another mega-system throws a cold front D.C.'s way.

So let's quantify the wetness of this last gusher, dubbed the "Mid-Atlantic and Northeast U.S. Heavy Rain Event" by the Hydrometeorological Prediction Center. According to the most recent data from the National Weather Service, this all happened yesterday:

Maryland got blasted with a planet-sized squirt gun: Flash floods were reported in Baltimore and Anne Arundel. Water as deep as 1.5 feet forced several streets to close, and emergency personnel extracted people from an apartment in Baltimore that flooded. (For a full accounting of the high-water incidents from Monday, I've pasted the NWS list below.)

Rain totals set a new record: The 8 inches of rain that fell on Sunday in Central Park made a fresh record in New York City's climate books. That's more than twice the rainfall that the city gets during an average August. By comparison, D.C. hasn't even gotten 3 inches this month. While not as end-of-the-world impressive, the highest rainfall total in Maryland from 8 a.m. Saturday to 4 a.m. Monday was 7.3 inches in Millington, a wettening that's not to be scoffed at. Good ol' Mustoe proved it is just as voracious for water in liquid form as well as crystalline by snaring Virginia's highest rainfall accumulation during the same time frame: 3.2 inches.

The complete tally of Northeast rain totals is here. And below are the flash floods reported in Maryland yesterday:

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
541 PM EDT MON AUG 15 2011

TIME / EVENT / LOCATION / LAT.LON / DATE / STREET / SOURCE

0830 AM FLASH FLOOD 1 S BROOKLYN PARK 39.20N 76.61W
08/15/2011 ANNE ARUNDEL MD 911 CALL CENTER

FOOT TO FOOT AND A HALF CLOSING STREETS

0830 AM FLASH FLOOD ANNAPOLIS 38.97N 76.50W
08/15/2011 ANNE ARUNDEL MD 911 CALL CENTER

FOOT TO FOOT AND A HALF CLOSING STREETS

0830 AM FLASH FLOOD 1 ESE LANSDOWNE 39.24N 76.64W
08/15/2011 BALTIMORE MD 911 CALL CENTER

FOOT TO FOOT AND A HALF CLOSING STREETS

0830 AM FLASH FLOOD 1 NW BROOKLYN PARK 39.23N 76.62W
08/15/2011 ANNE ARUNDEL MD 911 CALL CENTER

FOOT TO FOOT AND A HALF CLOSING STREETS

0920 AM FLASH FLOOD 2 E LANSDOWNE 39.24N 76.63W
08/15/2011 BALTIMORE CITY MD NEWSPAPER

PEOPLE RESCUED FROM AN APARTMENT THAT FLOODED

0925 AM FLASH FLOOD 2 NE MORRELL PARK 39.28N 76.64W
08/15/2011 BALTIMORE CITY MD 911 CALL CENTER

ROAD CLOSED AT SOUTH GILMORE ST DUE TO HIGH WATER

0930 AM FLASH FLOOD 1 E MORRELL PARK 39.26N 76.64W
08/15/2011 BALTIMORE CITY MD DEPT OF HIGHWAYS

ROADS CLOSED

0930 AM FLASH FLOOD 2 NNW BROOKLYN PARK 39.25N 76.62W
08/15/2011 BALTIMORE CITY MD DEPT OF HIGHWAYS

ROADS CLOSED

0930 AM FLASH FLOOD 2 E LANSDOWNE 39.24N 76.63W
08/15/2011 BALTIMORE CITY MD DEPT OF HIGHWAYS

0944 AM FLASH FLOOD 1 NNE CARROLL 39.30N 76.67W
08/15/2011 BALTIMORE CITY MD 911 CALL CENTER

ROAD CLOSED AT 1200 BLOOMINGDALE RD DUE TO HIGH WATER

1009 AM FLASH FLOOD 2 WNW BALTIMORE 39.31N 76.65W
08/15/2011 BALTIMORE CITY MD 911 CALL CENTER

ROAD CLOSED AT 1800 N FULTON DUE TO HIGH WATER

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