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Aspen Hill, MD

Alerts in Effect

Flash Flood Watch

Issued at 00:45 Wednesday 28 September 2016

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF MARYLAND...THE DISTRICT OF COLUMBIA...VIRGINIA AND
WEST VIRGINIA...INCLUDING THE FOLLOWING AREAS...IN MARYLAND...
ANNE ARUNDEL...CALVERT...CARROLL...CENTRAL AND EASTERN
ALLEGANY...CENTRAL AND SOUTHEAST HOWARD...CENTRAL AND
SOUTHEAST MONTGOMERY...CHARLES...FREDERICK MD...NORTHERN
BALTIMORE...NORTHWEST HARFORD...NORTHWEST HOWARD...NORTHWEST
MONTGOMERY...PRINCE GEORGES...SOUTHEAST HARFORD...SOUTHERN
BALTIMORE...ST. MARYS AND WASHINGTON. THE DISTRICT OF
COLUMBIA. IN VIRGINIA...ARLINGTON/FALLS CHURCH/ALEXANDRIA...
CLARKE...CULPEPER...EASTERN LOUDOUN...FAIRFAX...FREDERICK VA...
GREENE...KING GEORGE...MADISON...NORTHERN FAUQUIER...NORTHERN
VIRGINIA BLUE RIDGE...ORANGE...PAGE...PRINCE
WILLIAM/MANASSAS/MANASSAS PARK...RAPPAHANNOCK...SHENANDOAH...
SOUTHERN FAUQUIER...SPOTSYLVANIA...STAFFORD...WARREN AND
WESTERN LOUDOUN. IN WEST VIRGINIA...BERKELEY...EASTERN
MINERAL...HAMPSHIRE...HARDY...JEFFERSON AND MORGAN.

* FROM LATE TONIGHT THROUGH FRIDAY MORNING

* AN UPPER LEVEL LOW PRESSURE OVER THE WESTERN GREAT LAKES WILL
DROP SOUTHWARD INTO THE OHIO VALLEY WEDNESDAY INTO THURSDAY. AS
THE UPPER LOW DROPS SOUTHWARD...LOW LEVEL FLOW IS FORECAST TO
RAPIDLY INCREASE OVER THE AREA WEDNESDAY NIGHT RESULTING IN
SIGNIFICANT MOISTURE TRANSPORT INTO THE AREA. PERIODS OF HEAVY
RAINFALL ARE ANTICIPATED LATE WEDNESDAY NIGHT THROUGH THURSDAY
NIGHT ACROSS THE CENTRAL MID-ATLANTIC. THE PERIOD OF GREATEST
RAIN RATES IS EXPECTED LATE WEDNESDAY NIGHT THROUGH THURSDAY
AFTERNOON. WIDESPREAD RAINFALL AMOUNTS OF 3 TO 5 INCHES ARE
EXPECTED WITH LOCALIZED HIGHER TOTALS IN AREAS OF REPEATED
ACTIVITY. ADDITIONALLY...EASTERN SLOPES OF MOUNTAINS SUCH AS
THE NORTHERN BLUE RIDGE AND CATOCTIN MOUNTAIN ALSO HAVE AN
INCREASED RISK FOR HIGHER RAIN TOTALS.

* POTENTIAL EXISTS FOR FLASH FLOODING OF SMALL STREAMS...CREEKS
AND URBAN AREAS ESPECIALLY IN AREAS OF REPEATED ACTIVITY.

Issued by National Weather Service



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