Flash Flood Warning

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
756 PM EDT THU MAY 23 2013

MDC027-031-240130-
/O.CON.KLWX.FF.W.0017.000000T0000Z-130524T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONTGOMERY MD-HOWARD MD-
756 PM EDT THU MAY 23 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR
NORTHWESTERN HOWARD AND NORTH CENTRAL MONTGOMERY COUNTIES...

AT 754 PM EDT...SEVERAL REPORTS OF ROAD CLOSURES HAVE BEEN RECENTLY
RECEIVED BETWEEN DAMASCUS AND COOKSVILLE. THE LARGEST ROAD FLOODED
IS MARYLAND STATE ROUTE 97...REPORTED FLOODED AND CLOSED NEAR THE
FREDERICK ROAD INTERSECTION IN COOKSVILLE. RADAR ESTIMATES THAT 3 TO
4 INCHES OF RAIN HAVE FALLEN BETWEEN DAMASCUS AND COOKSVILLE. THE
HEAVY RAIN IS NOW MOVING OUT OF THE AREA...BUT FLASH FLOODING IS
ONGOING AND IS EXPECTED TO CONTINUE.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BOYDS...DAMASCUS...AND COOKSVILLE.

FLASH FLOODING HAS BEEN REPORTED ON MAGRUDER BRANCH...WITH LOGHOUSE
ROAD FLOODED AND IMPASSIBLE NEAR DAMASCUS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. ACT QUICKLY IF FLASH FLOODING IS OBSERVED. MOVE
TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT
TO FLOODING WHEN WATER BEGINS RISING.

TO REPORT FLASH FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
STERLING VIRGINIA.

LAT...LON 3936 7706 3936 7705 3935 7703 3936 7697
      3936 7693 3934 7688 3932 7685 3932 7684
      3912 7727 3921 7734 3932 7719 3937 7710

$$

JE

Short Term Forecast

SHORT TERM FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
746 PM EDT THU MAY 23 2013

MDZ009-010-VAZ053-240030-
FAIRFAX VA-HOWARD MD-MONTGOMERY MD-
746 PM EDT THU MAY 23 2013

.NOW...
AT 744 PM EDT...DOPPLER RADAR DETECTED A LINE OF THUNDERSTORMS. THESE
THUNDERSTORMS WERE LOCATED ALONG A LINE EXTENDING FROM OLNEY TO
POTOMAC TO GREAT FALLS...MOVING NORTHEAST AT 20 MPH.

LOCATIONS THAT LIKELY WILL BE IMPACTED INCLUDE GREAT FALLS...
POTOMAC...GLENMONT...FAIRLAND...CLARKSVILLE...HIGHLAND...POTOMAC...
COLESVILLE...BURTONSVILLE AND CLOVERLY.

OCCASIONAL CLOUD TO GROUND LIGHTNING IS OCCURRING. MOVE INDOORS UNTIL
THE STORM HAS PASSED.

GUSTY WINDS OF 30 TO 40 MPH CAN BE EXPECTED.

HEAVY DOWNPOURS COULD REDUCE VISIBILITIES AND CAUSE WATER TO POND ON
ROADWAYS.

ADDITIONAL RAINFALL UP TO ONE-HALF INCH CAN BE EXPECTED.

$$

GMS

Hazardous Weather Outlook

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
639 PM EDT THU MAY 23 2013

MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504-
WVZ050>053-055-501>506-241145-
WASHINGTON-FREDERICK MD-CARROLL-MONTGOMERY-HOWARD-
EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-AUGUSTA-
ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-NELSON-
ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER-
NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND-
EASTERN HIGHLAND-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY-
WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL-
WESTERN PENDLETON-EASTERN PENDLETON-
639 PM EDT THU MAY 23 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN WEST VIRGINIA...
NORTHERN AND CENTRAL VIRGINIA...AND CENTRAL AND WESTERN MARYLAND
WITH THE EXCEPTION OF GARRETT COUNTY.

.DAY ONE...TONIGHT

THUNDERSTORMS ARE EXPECTED THIS EVENING. SOME OF THE STORMS MAY
PRODUCE DAMAGING WIND GUSTS AND LARGE HAIL. THUNDERSTORMS WILL
ALSO BE CAPABLE OF PRODUCING LOCALLY HEAVY RAINFALL WHICH COULD
LEAD TO FLASH FLOODING ACROSS VULNERABLE AREAS OF THE POTOMAC
HIGHLANDS AND SHENANDOAH VALLEY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A FREEZE MAY OCCUR IN THE PORTIONS OF THE ALLEGHENY HIGHLANDS
FRIDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. HOWEVER...PLEASE
FORWARD ANY REPORTS OF LARGE HAIL...DAMAGING WINDS...OR FLOODING
TO THE NATIONAL WEATHER SERVICE.

$$

HTS