Alert archive / Pennsylvania / River Flood Warnings in 2011
River Flood Warning 203, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this river flood warning at Nov 23, 2011, 3:39 AM EST for Montgomery County, Pennsylvania. It took effect at Nov 23, 2011, 5:00 AM EST. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Nov 23, 2011, 3:39 AM EST (08:39 UTC)
- In effect from
- Nov 23, 2011, 5:00 AM EST
- Expired
- Nov 23, 2011, 2:45 PM EST
- In force
- 10 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- Minor
County Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 08:40 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.
The river
Written for the forecast point Perkiomen Creek at Graterford (GRAP1). The gauge peaked at 12.60 ft at Nov 23, 2011, 7:00 AM EST.
- 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.
The text
As transmitted, in the capitals the NWS used until 2016.
518
WGUS41 KPHI 230839
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
339 AM EST WED NOV 23 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.
&&
PAC091-231439-
/O.NEW.KPHI.FL.W.0203.111123T1000Z-111123T2051Z/
/GRAP1.1.ER.111123T1000Z.111123T1200Z.111123T1451Z.NO/
339 AM EST WED NOV 23 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLOOD WARNING FOR
THE PERKIOMEN CREEK AT GRATERFORD.
* UNTIL THIS AFTERNOON...OR UNTIL THE WARNING IS CANCELLED.
* AT 3:16 AM WEDNESDAY THE STAGE WAS 10.3 FEET.
* FLOOD STAGE IS 11.0 FEET.
* MINOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE EARLY THIS MORNING AND CONTINUE
TO RISE TO NEAR 12.0 FEET LATER THIS MORNING. THE RIVER WILL FALL BELOW
FLOOD STAGE THIS AFTERNOON.
* IMPACT...AT 12.0 FEET...PENITENTIARY BRIDGE IS CLOSED. FLOODING BEGINS
IN COLLEGVILLE. HOUSES ON THE RIGHT BANK IN GRATERFORD TAKE ON WATER
$$
FLD OBSERVED FORECAST
LOCATION STG STG DAY TIME CREST
PERKIOMEN CREEK
GRATERFORD 11.0 10.26 WED 3 AM 12.0 WED 7 AM
&&3 follow-up statements
733
WGUS41 KPHI 231112
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
612 AM EST WED NOV 23 2011
...THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A FLOOD
WARNING FOR THE FOLLOWING RIVERS IN NEW JERSEY...
SOUTH BRANCH RARITAN RIVER AT STANTON AFFECTING HUNTERDON AND SOMERSET
COUNTIES
...FORECAST FLOODING CHANGED FROM MINOR TO MODERATE SEVERITY FOR THE
FOLLOWING RIVERS IN PENNSYLVANIA...
PERKIOMEN CREEK AT GRATERFORD AFFECTING MONTGOMERY COUNTY
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE
WATER MAY BE DEEPER THAN YOU THINK.
&&
PAC091-231712-
/O.EXT.KPHI.FL.W.0203.000000T0000Z-111124T0120Z/
/GRAP1.2.ER.111123T0910Z.111123T1500Z.111123T1920Z.NO/
612 AM EST WED NOV 23 2011
...FORECAST FLOODING INCREASED FROM MINOR TO MODERATE SEVERITY...
THE FLOOD WARNING CONTINUES FOR
THE PERKIOMEN CREEK AT GRATERFORD.
* UNTIL THIS EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT 5:15 AM WEDNESDAY THE STAGE WAS 11.9 FEET.
* FLOOD STAGE IS 11.0 FEET.
* MINOR FLOODING IS OCCURRING AND MODERATE FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 13.0 FEET BY LATE
THIS MORNING. THE RIVER WILL FALL BELOW FLOOD STAGE THIS AFTERNOON.
* IMPACT...AT 13.0 FEET...SEWAGE TREATMENT PLANT IN SWENKSVILLE FLOODED
$$
NJC019-035-231711-
/O.NEW.KPHI.FL.W.0206.111123T1200Z-111124T0600Z/
/STTN4.1.ER.111123T1200Z.111123T1800Z.111124T0000Z.NO/
612 AM EST WED NOV 23 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLOOD WARNING FOR
THE SOUTH BRANCH RARITAN RIVER AT STANTON.
* UNTIL LATE TONIGHT...OR UNTIL THE WARNING IS CANCELLED.
* AT 5:15 AM WEDNESDAY THE STAGE WAS 7.5 FEET.
* FLOOD STAGE IS 8.0 FEET.
* MINOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE BY THIS MORNING AND CONTINUE TO RISE
TO NEAR 9.0 FEET BY THIS AFTERNOON. THE RIVER WILL FALL BELOW FLOOD
STAGE BY THIS EVENING.
* IMPACT...AT 10.0 FEET...HOUSES DOWNSTREAM BEGIN TO TAKE ON WATER.
$$
FLD OBSERVED FORECAST
LOCATION STG STG DAY TIME CREST
RARITAN RIVER
STANTON 8.0 7.50 WED 5 AM 9.0 WED 1 PM
PERKIOMEN CREEK
GRATERFORD 11.0 11.94 WED 5 AM 13.0 WED 10 AM
&&978
WGUS81 KPHI 231734
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1234 PM EST WED NOV 23 2011
...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN
PENNSYLVANIA...
PERKIOMEN CREEK AT GRATERFORD AFFECTING MONTGOMERY COUNTY
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE
WATER MAY BE DEEPER THAN YOU THINK.
&&
PAC091-240100-
/O.EXT.KPHI.FL.W.0203.000000T0000Z-111124T0100Z/
/GRAP1.1.ER.111123T0910Z.111123T1230Z.111123T1900Z.NO/
1234 PM EST WED NOV 23 2011
THE FLOOD WARNING CONTINUES FOR
THE PERKIOMEN CREEK AT GRATERFORD.
* AT 12:15 PM WEDNESDAY THE STAGE WAS 11.4 FEET.
* FLOOD STAGE IS 11.0 FEET.
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL FALL BELOW FLOOD STAGE THIS AFTERNOON.
* IMPACT...AT 12.0 FEET...PENITENTIARY BRIDGE IS CLOSED. FLOODING BEGINS
IN COLLEGVILLE. HOUSES ON THE RIGHT BANK IN GRATERFORD TAKE ON WATER.
$$
FLD OBSERVED FORECAST
LOCATION STG STG DAY TIME CREST
PERKIOMEN CREEK
GRATERFORD 11.0 11.44 WED 12 PM CRESTED AND FALLING
&&330
WGUS81 KPHI 231945
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
245 PM EST WED NOV 23 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.
&&
PAC091-232015-
/O.CAN.KPHI.FL.W.0203.000000T0000Z-111124T0100Z/
/GRAP1.1.ER.111123T0910Z.111123T1230Z.111123T1802Z.NO/
245 PM EST WED NOV 23 2011
THE FLOOD WARNING IS CANCELLED FOR
THE PERKIOMEN CREEK AT GRATERFORD.
* AT 2:31 PM WEDNESDAY THE STAGE WAS 9.5 FEET.
* FLOOD STAGE IS 11.0 FEET.
* FELL BELOW FLOOD STAGE AT 1:02 PM WEDNESDAY.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO 5.8 FEET BY TOMORROW
MORNING.
$$
FLD OBSERVED FORECAST
LOCATION STG STG DAY TIME CREST
PERKIOMEN CREEK
GRATERFORD 11.0 9.48 WED 3 PM CRESTED AN FALLING
&&The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 22, 9:32 PM EST | Coastal Flood Advisory | PHI | Delaware, Philadelphia | 15 hr |
| Nov 22, 9:56 PM EST | Areal Flood Warning | PHI | Berks, Chester, Montgomery | 6 hr |
| Nov 23, 12:35 AM EST | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more | 6 hr |
| Nov 23, 1:17 AM EST | Areal Flood Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 6 hr |
| Nov 23, 2:39 AM EST | River Flood Warning | PHI | Bucks | 9 hr |
| Nov 23, 3:08 AM EST | Special Weather Statement | PHI | Bucks, Chester, Delaware, Monroe, Montgomery, Northampton and 1 more | 3 hr |
| Nov 23, 3:44 AM EST | Areal Flood Warning | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Monroe and 3 more | 8 hr |
| Nov 23, 5:13 AM EST | Areal Flood Advisory | PHI | Philadelphia | 3 hr |
| Nov 23, 5:54 AM EST | River Flood Warning | PHI | Chester, Montgomery, Philadelphia | 16 hr |
| Nov 23, 6:34 AM EST | River Flood Warning | PHI | Chester | 7 hr |
| Nov 23, 6:57 AM EST | River Flood Warning | PHI | Chester, Delaware | 16 hr |
| Nov 23, 9:45 AM EST | Special Weather Statement | PHI | Berks | 60 min |
| Nov 23, 10:26 AM EST | River Flood Warning | PHI | Montgomery, Philadelphia | 5 hr |
| Nov 23, 11:50 AM EST | Areal Flood Warning | PHI | Berks, Chester, Montgomery | 4 hr |
Nearby
River Flood Warnings in Pennsylvania, 2011Every river flood warning in 2011
Sources
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.