
372 
WGUS71 KLWX 082217
FFSLWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
617 PM EDT THU SEP 8 2011

VAC059-153-510-600-090115-
/O.CON.KLWX.FF.W.0150.000000T0000Z-110909T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CITY OF ALEXANDRIA VA-CITY OF FAIRFAX VA-PRINCE WILLIAM VA-FAIRFAX VA-
617 PM EDT THU SEP 8 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR 
EASTERN FAIRFAX...SOUTHEASTERN PRINCE WILLIAM COUNTIES...AND EASTERN 
CITY OF FAIRFAX AND CITY OF ALEXANDRIA...

AT 600 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED TORRENTIAL 
RAINFALL REDEVELOPING OVER THE SAME AREA WHERE WIDESPREAD FLASH 
FLOODING HAD OCCURRED DURING THE AFTERNOON. TRAINED SPOTTERS AND 
LOCAL LAW ENFORCEMENT HAVE ALREADY REPORTED NEW INCIDENTS OF FLASH 
FLOODING IN EASTERN FAIRFAX COUNTY.

THIS IS A FLASH FLOOD EMERGENCY. WIDESPREAD FLASH FLOODING IS 
OCCURRING.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PIMMIT
HILLS...MANTUA...WOLF TRAP...VIENNA...TYSONS CORNER...THE I66 AND
I495 INTERCHANGE...OAKTON...MERRIFIELD...MCLEAN...LAKE BARCROFT AND
GREAT FALLS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR ESTIMATES AND OBSERVATIONS SHOW TWO TO FOUR INCHES OF 
RAIN HAS ALREADY FALLEN THIS AFTERNOON ACROSS FAIRFAX...VIENNA AND 
GREAT FALLS. WITH THE SECOND ROUND OF RAIN...RAINFALL RATES OF THREE 
TO FOUR INCHES PER HOUR ARE POSSIBLE IN THE WARNED AREA THROUGH THE 
EARLY EVENING.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

&&

LAT...LON 3902 7725 3898 7724 3895 7714 3893 7712
      3889 7720 3887 7720 3886 7716 3887 7714
      3885 7711 3884 7707 3877 7708 3869 7719
      3854 7730 3856 7734 3905 7731

$$

JRK