River Flood Warning 64, NWS Philadelphia/Mount Holly

Issued

Apr 16, 2011, 11:11 PM EDT (03:11 UTC)

In effect from

Apr 17, 2011, 5:51 AM EDT

Expired

Apr 17, 2011, 5:11 AM EDT

In force

Issued by

NWS Philadelphia/Mount Holly

Flood severity

Minor

County Montgomery County, PA

The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 03:14 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.

Written for the forecast point Perkiomen Creek at Graterford (GRAP1). The gauge peaked at 10.70 ft at Apr 17, 2011, 3:00 AM EDT.

Action stage

8 ft

Minor stage

11 ft

Moderate stage

13 ft

Major stage

16 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01473000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

259 
WGUS41 KPHI 170311
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1111 PM EDT SAT APR 16 2011

...THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A FLOOD 
WARNING FOR THE FOLLOWING RIVERS IN PENNSYLVANIA... 

  PERKIOMEN CREEK AT GRATERFORD AFFECTING MONTGOMERY COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK.

&&

PAC091-170911-
/O.NEW.KPHI.FL.W.0064.110417T0951Z-110417T1915Z/
/GRAP1.1.ER.110417T0951Z.110417T1200Z.110417T1315Z.NO/
1111 PM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE PERKIOMEN CREEK AT GRATERFORD.
* FROM LATE TONIGHT TO SUNDAY AFTERNOON...OR UNTIL THE WARNING IS 
  CANCELLED.
* AT 10:46 PM SATURDAY THE STAGE WAS 9.4 FEET. 
* FLOOD STAGE IS 11.0 FEET. 
* MINOR FLOODING IS FORECAST. 
* IMPACT...AT 12.0 FEET...PENITENTIARY BRIDGE IS CLOSED. FLOODING BEGINS 
  IN COLLEGVILLE. HOUSES ON THE RIGHT BANK IN GRATERFORD TAKE ON WATER

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

PERKIOMEN CREEK
  GRATERFORD       11.0    9.39  SAT 11 PM   11.5  SUN 8 AM 

&&

593 
WGUS81 KPHI 170911
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
511 AM EDT SUN APR 17 2011

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN 
PENNSYLVANIA...
 
  PERKIOMEN CREEK AT GRATERFORD AFFECTING MONTGOMERY COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK.

&&

PAC091-170941-
/O.CAN.KPHI.FL.W.0064.000000T0000Z-110417T1915Z/
/GRAP1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
511 AM EDT SUN APR 17 2011

THE FLOOD WARNING IS CANCELLED FOR
  THE PERKIOMEN CREEK AT GRATERFORD.
* AT  4:30 AM SUNDAY THE STAGE WAS 10.6 FEET AND FALLING.
* FLOOD STAGE IS 11.0 FEET. 
* FORECAST...THE RIVER CRESTED BELOW FLOOD STAGE AT 10.7 FEET.  THE 
  RIVER WILL FALL TO 4.2 FEET BY MONDAY MORNING. 
* IMPACT...AT 12.0 FEET...PENITENTIARY BRIDGE IS CLOSED. FLOODING BEGINS 
  IN COLLEGVILLE. HOUSES ON THE RIGHT BANK IN GRATERFORD TAKE ON WATER

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

PERKIOMEN CREEK
  GRATERFORD       11.0   10.55  SUN 4 AM     CRESTED AND FALLING 

&&

River Flood Warnings in Pennsylvania, 2011Every river flood warning in 2011

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