Alert archive / Pennsylvania / River Flood Warnings in 2011

River Flood Warning 22, NWS Philadelphia/Mount Holly

March 10, 2011Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Mar 10, 2011, 4:55 PM EST for Chester County, Pennsylvania. It took effect at Mar 10, 2011, 5:48 PM EST. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Mar 10, 2011, 4:55 PM EST (21:55 UTC)
In effect from: Mar 10, 2011, 5:48 PM EST
Expired: Mar 11, 2011, 9:34 AM EST
In force: 16 hr
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Moderate

County Chester County, PA

The river

Written for the forecast point East Branch Brandywine Creek below Downingtown (DWNP1). The gauge peaked at 10.66 ft at Mar 11, 2011, 12:00 AM EST.

Action stage: 6 ft
Minor stage: 7 ft
Moderate stage: 9 ft
Major stage: 11 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01480870, 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.

625 
WGUS41 KPHI 102155
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
455 PM EST THU MAR 10 2011

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

  EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN AFFECTING CHESTER 
  COUNTY

  HEAVIER RAIN IS NOW MOVING INTO THE EAST BRANCH BRANDYWINE WATERSHED SO
WATER LEVELS ARE EXPECTED TO INCREASE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-110355-
/O.NEW.KPHI.FL.W.0022.110310T2248Z-110312T0114Z/
/DWNP1.2.ER.110310T2248Z.110311T0800Z.110311T1914Z.NO/
455 PM EST THU MAR 10 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* UNTIL FRIDAY EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT  3:45 PM THURSDAY THE STAGE WAS 5.9 FEET. 
* FLOOD STAGE IS 7.0 FEET.
* MODERATE FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE EARLY THIS EVENING AND CONTINUE 
  TO RISE TO OVER 10 FEET EARLY TOMORROW. THE RIVER WILL FALL BELOW
  FLOOD STAGE BY EARLY TOMORROW AFTERNOON.


$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0    5.91  THU 4 PM    10.6  FRI 3 AM 

&&

3 follow-up statements

691 
WGUS41 KPHI 110341
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1041 PM EST THU MAR 10 2011

...FORECAST FLOODING CHANGED FROM MODERATE TO MAJOR SEVERITY FOR THE 
FOLLOWING RIVERS IN PENNSYLVANIA...

  EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN AFFECTING CHESTER 
  COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-110941-
/O.EXT.KPHI.FL.W.0022.000000T0000Z-110312T0234Z/
/DWNP1.3.ER.110310T2211Z.110311T0700Z.110311T2034Z.NO/
1041 PM EST THU MAR 10 2011

...FORECAST FLOODING INCREASED FROM MODERATE TO MAJOR SEVERITY...
THE FLOOD WARNING CONTINUES FOR 
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* UNTIL FRIDAY EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT 10:16 PM THURSDAY THE STAGE WAS 10.3 FEET. 
* FLOOD STAGE IS 7.0 FEET.
* MODERATE FLOODING IS OCCURRING AND MAJOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 11.4 FEET 
  OVERNIGHT. THE RIVER WILL FALL BELOW FLOOD STAGE TOMORROW 
  AFTERNOON.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0   10.28  THU 10 PM   11.4  FRI 2 AM 

&&

393 
WGUS81 KPHI 110746
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
246 AM EST FRI MAR 11 2011

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN 
PENNSYLVANIA...
 
  EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN AFFECTING CHESTER COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-111746-
/O.EXT.KPHI.FL.W.0022.000000T0000Z-110311T2036Z/
/DWNP1.2.ER.110310T2211Z.110311T0515Z.110311T1436Z.NO/
246 AM EST FRI MAR 11 2011

THE FLOOD WARNING CONTINUES FOR
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* UNTIL THIS AFTERNOON...OR UNTIL THE WARNING IS CANCELLED.
* AT 2:16 AM FRIDAY THE STAGE WAS 10.0 FEET. 
* FLOOD STAGE IS 7.0 FEET.
* MODERATE FLOODING IS OCCURRING AND MODERATE FLOODING IS FORECAST. 
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE BY 
  LATE THIS MORNING.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0   10.03  FRI 2 AM     9.8  FRI 3 AM 

&&

408 
WGUS81 KPHI 111434
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
934 AM EST FRI MAR 11 2011

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN 
PENNSYLVANIA...
 
  EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN AFFECTING CHESTER 
  COUNTY

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN 
PENNSYLVANIA...
 
  BRANDYWINE CREEK AT CHADDS FORD AFFECTING CHESTER AND DELAWARE COUNTIES
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-111504-
/O.CAN.KPHI.FL.W.0022.000000T0000Z-110311T2036Z/
/DWNP1.2.ER.110310T2211Z.110311T0515Z.110311T1216Z.NO/
934 AM EST FRI MAR 11 2011

THE FLOOD WARNING IS CANCELLED FOR
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* AT  9:16 AM FRIDAY THE STAGE WAS 6.5 FEET. 
* FLOOD STAGE IS 7.0 FEET. 
* FELL BELOW FLOOD STAGE AT  7:16 AM FRIDAY.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO 4.2 FEET BY TOMORROW 
  MORNING.


$$

PAC029-045-120034-
/O.EXT.KPHI.FL.W.0024.000000T0000Z-110312T0200Z/
/CDFP1.2.ER.110311T0220Z.110311T1215Z.110311T2000Z.NO/
934 AM EST FRI MAR 11 2011

THE FLOOD WARNING CONTINUES FOR
  THE BRANDYWINE CREEK AT CHADDS FORD.
* AT  9:15 AM FRIDAY THE STAGE WAS 11.5 FEET. 
* FLOOD STAGE IS 9.0 FEET. 
* MODERATE FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE BY 
  LATE THIS AFTERNOON.
* IMPACT...AT 11.8 FEET...BRANDYWINE RIVER MUSEUM BEGINS TO TAKE ON WATER

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       

BRANDYWINE CREEK
  DOWNINGTOWN      7.0    6.49  FRI 9 AM     6.9  FRI 10 AM
  CHADDS FORD      9.0   11.54  FRI 9 AM     9.7  FRI 1 PM 

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 10, 2:10 AM EST	Coastal Flood Advisory	PHI	Delaware, Philadelphia	5 hr
Mar 10, 7:28 AM EST	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Monroe and 3 more	6 hr
Mar 10, 1:17 PM EST	Areal Flood Advisory	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	5 hr
Mar 10, 3:02 PM EST	Coastal Flood Warning	PHI	Delaware, Philadelphia	17 hr
Mar 10, 4:36 PM EST	Areal Flood Warning	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 3 more	37 hr
Mar 10, 5:17 PM EST	Wind Advisory	PHI	Delaware, Philadelphia	5 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; the gauge from the NWS water service and the USGS.