Alert archive / Pennsylvania / River Flood Warnings in 2011

River Flood Warning 219, NWS Philadelphia/Mount Holly

December 7, 2011Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Dec 7, 2011, 10:12 PM EST for Bucks County, Pennsylvania. It took effect at Dec 8, 2011, 12:45 AM EST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Dec 7, 2011, 10:12 PM EST (03:12 UTC)
In effect from: Dec 8, 2011, 12:45 AM EST
Expired: Dec 8, 2011, 10:39 AM EST
In force: 10 hr
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Minor

County Bucks County, PA

The radar

The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 03:12 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 Neshaminy Creek near Langhorne (LNGP1). The gauge peaked at 10.64 ft at Dec 8, 2011, 4:00 AM EST.

Action stage: 8 ft
Minor stage: 9 ft
Moderate stage: 12 ft
Major stage: 14 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01465500, 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.

608 
WGUS41 KPHI 080312
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1012 PM EST WED DEC 7 2011

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

  ASSUNPINK CREEK AT TRENTON AFFECTING MERCER COUNTY
  NESHAMINY CREEK AT LANGHORNE AFFECTING BUCKS COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

NJC021-080912-
/O.NEW.KPHI.FL.W.0218.111208T0500Z-111208T1200Z/
/TACN4.1.ER.111208T0500Z.111208T0500Z.111208T0600Z.UU/
1012 PM EST WED DEC 7 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE ASSUNPINK CREEK AT TRENTON.
* UNTIL THURSDAY MORNING...OR UNTIL THE WARNING IS CANCELLED.
* AT 10:00 PM WEDNESDAY THE STAGE WAS 7.2 FEET. 
* FLOOD STAGE IS 8.5 FEET. 
* MINOR FLOODING IS FORECAST. 
* FORECAST...THE RIVER IS EXPECTED TO RISE TO NEAR FLOOD STAGE AFTER 
  MIDNIGHT TONIGHT.
* IMPACT...AT 10.0 FEET...MULBERRY STREET FLOODS

$$

PAC017-080912-
/O.NEW.KPHI.FL.W.0219.111208T0545Z-111208T1234Z/
/LNGP1.1.ER.111208T0545Z.111208T0600Z.111208T0634Z.NO/
1012 PM EST WED DEC 7 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE NESHAMINY CREEK AT LANGHORNE.
* UNTIL THURSDAY MORNING...OR UNTIL THE WARNING IS CANCELLED.
* AT  9:15 PM WEDNESDAY THE STAGE WAS 6.0 FEET. 
* FLOOD STAGE IS 9.0 FEET. 
* MINOR FLOODING IS FORECAST. 
* FORECAST...RISE ABOVE FLOOD STAGE AFTER MIDNIGHT TONIGHT AND 
  CONTINUE TO RISE TO NEAR 9.2 FEET AFTER MIDNIGHT TONIGHT. THE RIVER
  WILL FALL BELOW FLOOD STAGE TOWARD MORNING.
* IMPACT...AT 9.0 FEET...FLOOD STAGE REACHED WITH SOME HOMES FLOODED IN 
  LANGHORNE TERRACE

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

ASSUNPINK CREEK
  TRENTON          8.5    7.17  WED 10 PM    8.5    THU 12 AM

NESHAMINY CREEK
  LANGHORNE        9.0    6.02  WED 9 PM     9.2    THU 1 AM 

&&

3 follow-up statements

933 
WGUS41 KPHI 080758
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
258 AM EST THU DEC 8 2011

...FORECAST FLOODING CHANGED FROM MINOR TO MODERATE SEVERITY FOR THE 
FOLLOWING RIVERS IN PENNSYLVANIA...
  NESHAMINY CREEK AT LANGHORNE AFFECTING BUCKS COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC017-081358-
/O.EXT.KPHI.FL.W.0219.000000T0000Z-111208T1934Z/
/LNGP1.2.ER.111208T0434Z.111208T0715Z.111208T1334Z.NO/
258 AM EST THU DEC 8 2011

...FORECAST FLOODING INCREASED FROM MINOR TO MODERATE SEVERITY...
THE FLOOD WARNING CONTINUES FOR 
  THE NESHAMINY CREEK AT LANGHORNE.
* UNTIL THIS AFTERNOON...OR UNTIL THE WARNING IS CANCELLED.
* AT 2:15 AM THURSDAY THE STAGE WAS 10.4 FEET. 
* FLOOD STAGE IS 9.0 FEET. 
* MODERATE FLOODING IS OCCURRING AND MODERATE FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE  
  THIS MORNING.
* IMPACT...AT 10.0 FEET...AT THIS LEVEL SOME HOMES IN THE AREA OF THE 
  LANGHORNE GAGE ARE EVACUATED

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

NESHAMINY CREEK
  LANGHORNE        9.0   10.44  THU 2 AM    10.6    THU 7 AM 

&&

572 
WGUS81 KPHI 080911
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
411 AM EST THU DEC 8 2011

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN 
PENNSYLVANIA...
 
  NESHAMINY CREEK AT LANGHORNE AFFECTING BUCKS COUNTY 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC017-081911-
/O.EXT.KPHI.FL.W.0219.000000T0000Z-111208T2100Z/
/LNGP1.2.ER.111208T0434Z.111208T1200Z.111208T1500Z.NO/
411 AM EST THU DEC 8 2011

THE FLOOD WARNING CONTINUES FOR
  THE NESHAMINY CREEK AT LANGHORNE.
* AT 3:15 AM THURSDAY THE STAGE WAS 10.6 FEET. 
* FLOOD STAGE IS 9.0 FEET. 
* MODERATE FLOODING IS OCCURRING AND MODERATE FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE TO RISE TO NEAR 11.2 FEET EARLY THIS 
  MORNING. THE RIVER WILL FALL BELOW FLOOD STAGE LATE THIS MORNING.
* IMPACT...AT 11.0 FEET...AT THIS LEVEL CONSIDERABLE DAMAGE IS REPORTED 
  THROUGHOUT THE LOWER NESHAMINY CREEK BASIN

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

NESHAMINY CREEK
  LANGHORNE        9.0   10.59  THU 3 AM    11.2    THU 7 AM 

&&

972 
WGUS81 KPHI 081539
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1039 AM EST THU DEC 8 2011

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN 
PENNSYLVANIA...
 
  NESHAMINY CREEK AT LANGHORNE AFFECTING BUCKS COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC017-081609-
/O.CAN.KPHI.FL.W.0219.000000T0000Z-111208T2100Z/
/LNGP1.2.ER.111208T0434Z.111208T0915Z.111208T1446Z.NO/
1039 AM EST THU DEC 8 2011

THE FLOOD WARNING IS CANCELLED FOR
  THE NESHAMINY CREEK AT LANGHORNE.
* AT 10:15 AM THURSDAY THE STAGE WAS 8.6 FEET. 
* FLOOD STAGE IS 9.0 FEET. 
* FELL BELOW FLOOD STAGE AT 9:46 AM THURSDAY.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO 3.7 FEET BY TOMORROW 
  MORNING.
* IMPACT...AT 9.0 FEET...FLOOD STAGE REACHED WITH SOME HOMES FLOODED IN 
  LANGHORNE TERRACE

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG   DAY TIME      CREST

NESHAMINY CREEK
  LANGHORNE        9.0    8.64  THU 10 AM     BELOW FLOOD STAGE 

&&

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 7, 8:04 PM EST	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	18 hr
Dec 7, 9:41 PM EST	River Flood Warning	PHI	Delaware	5 hr
Dec 7, 11:40 PM EST	River Flood Warning	PHI	Chester	8 hr
Dec 8, 1:58 AM EST	Areal Flood Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	5 hr
Dec 8, 2:21 AM EST	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	10 hr
Dec 8, 2:51 AM EST	River Flood Warning	PHI	Chester, Delaware	13 hr

Nearby

River Flood Warnings in Pennsylvania, 2011 Every 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.