Flash Flood Warning 13, NWS Philadelphia/Mount Holly

Issued

May 31, 2007, 8:19 PM EDT (00:19 UTC)

Expired

May 31, 2007, 10:15 PM EDT

In force

116 min

Issued by

NWS Philadelphia/Mount Holly

Area

Whole counties

Counties Berks County, PA, Lehigh County, PA

The Philadelphia radar (KDIX), 131 km from the middle of the area, began a volume at 00:21 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

000 
WGUS51 KPHI 010019
FFWPHI
PAC011-077-010215-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
819 PM EDT THU MAY 31 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
  SOUTHERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...

* UNTIL 1015 PM EDT

* AT 815 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  HEAVY RAINS CONTINUING OVER THE WARNED AREAS. ALSO, LOCAL LAW
  ENFORCEMENT OFFICIALS REPORTED LOCALIZED FLOODING IN ALLENTOWN.
  THE THUNDERSTORMS WILL CONTINUE TO MOVE SOUTHEASTWARD AT 5 TO 10
  MILES AN HOUR THROUGH NORTHEASTERN BERKS AND SOUTHEASTERN LEHIGH
  COUNTIES THROUGH 9:00 PM.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

LAT...LON 4065 7573 4056 7584 4041 7556 4052 7538
      4057 7553

$$

JRP

000 
WGUS71 KPHI 010124
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
924 PM EDT THU MAY 31 2007

PAC011-077-010215-
BERKS PA-LEHIGH PA-
924 PM EDT THU MAY 31 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR
SOUTHERN LEHIGH AND NORTHEASTERN BERKS COUNTIES...

ABOUT 845 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT 
WATER RESCUES WERE OCCURRING IN UPPER MACUNGIE, LOWER MACUNGIE, AND 
WEISENBERG IN LEHIGH COUNTY. THE FLOODING RESULTED FROM PERSISTENT 
THUNDERSTORMS WHICH PRODUCED 3 TO 4 INCHES OF RAIN IN A COUPLE OF 
HOURS EARLIER THIS EVENING. THIS EARLIER RAIN ALSO EXTENDED INTO FAR 
NORTHEASTERN BERKS COUNTY.

THESE THUNDERSTORMS WERE STILL OCCURRING, AND OTHERS HAD INCREASED 
IN INTENSITY OVER NORTHWESTERN PORTIONS OF THE COUNTY BETWEEN 8:15 
AND 9:15 PM. THESE NORTHWESTERN AREAS WILL EXPERIENCE AT LEAST 
LOCALIZED FLOODING OF ROADS AND LOW SPOTS. A FLASH FLOOD WARNING MAY 
NEED TO BE ISSUED FOR NORTHWESTERN LEHIGH COUNTY AS WELL.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

LAT...LON 4065 7573 4056 7584 4041 7556 4052 7538
      4057 7553

$$

JRP

Flash Flood Warnings in Pennsylvania, 2007Every flash flood warning in 2007

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.