Alert archive / Pennsylvania / River Flood Warnings in 2011

River Flood Warning 220, NWS Philadelphia/Mount Holly

December 7, 2011Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Dec 7, 2011, 11:40 PM EST for Chester County, Pennsylvania. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Dec 7, 2011, 11:40 PM EST (04:40 UTC)
Expired: Dec 8, 2011, 7:52 AM EST
In force: 8 hr
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Minor

County Chester County, PA

The radar

The Philadelphia radar (KDIX), 114 km from the middle of the area, began a volume at 04:44 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 East Branch Brandywine Creek below Downingtown (DWNP1). The gauge peaked at 8.92 ft at Dec 8, 2011, 1:00 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.

882 
WGUS41 KPHI 080440
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1140 PM EST WED DEC 7 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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-081040-
/O.NEW.KPHI.FL.W.0220.111208T0440Z-111208T1222Z/
/DWNP1.1.ER.111208T0440Z.111208T0500Z.111208T0622Z.NO/
1140 PM EST WED DEC 7 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* UNTIL THURSDAY MORNING...OR UNTIL THE WARNING IS CANCELLED.
* AT 11:30 PM WEDNESDAY THE STAGE WAS 6.8 FEET. 
* FLOOD STAGE IS 7.0 FEET. 
* MINOR FLOODING IS FORECAST. 
* FORECAST...RISE ABOVE FLOOD STAGE BY TONIGHT AND CONTINUE TO RISE TO 
  NEAR 7.5 FEET BY AFTER MIDNIGHT. THE RIVER WILL FALL BELOW 
  FLOOD STAGE BY LATER THIS MORNING.


$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0    6.75  WED 11 PM    7.5    THU 12 AM

&&

3 follow-up statements

174 
WGUS81 KPHI 080748
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
248 AM EST THU DEC 8 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.

&&

PAC029-081348-
/O.EXT.KPHI.FL.W.0220.000000T0000Z-111208T1348Z/
/DWNP1.1.ER.111208T0447Z.111208T0715Z.111208T0748Z.NO/
248 AM EST THU DEC 8 2011

...FLOOD WARNING EXTENDED UNTIL THIS MORNING...THE FLOOD WARNING 
CONTINUES FOR
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* UNTIL THIS MORNING...OR UNTIL THE WARNING IS CANCELLED.
* AT  2:15 AM THURSDAY THE STAGE WAS 8.9 FEET. 
* FLOOD STAGE IS 7.0 FEET.
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST. 
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE  
  THIS MORNING.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0    8.94  THU 2 AM     

&&

340 
WGUS81 KPHI 080908
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
408 AM EST THU DEC 8 2011

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

&&

PAC029-081520-
/O.EXT.KPHI.FL.W.0220.000000T0000Z-111208T1520Z/
/DWNP1.1.ER.111208T0447Z.111208T0715Z.111208T0920Z.NO/
408 AM EST THU DEC 8 2011

THE FLOOD WARNING CONTINUES FOR
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* AT 3:46 AM THURSDAY THE STAGE WAS 8.4 FEET. 
* FLOOD STAGE IS 7.0 FEET. 
* MINOR FLOODING IS OCCURRING.
* FORECAST...THE RIVER WILL FALL BELOW FLOOD STAGE EARLY THIS MORNING.

$$

PAC029-045-081908-
/O.EXT.KPHI.FL.W.0222.111208T0905Z-111208T2100Z/
/CDFP1.1.ER.111208T0807Z.111208T1200Z.111208T1500Z.NO/
408 AM EST THU DEC 8 2011

THE FLOOD WARNING CONTINUES FOR
  THE BRANDYWINE CREEK AT CHADDS FORD.
* UNTIL THIS AFTERNOON...OR UNTIL THE WARNING IS CANCELLED.
* AT 3:45 AM THURSDAY THE STAGE WAS 9.1 FEET. 
* FLOOD STAGE IS 9.0 FEET. 
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 9.4 FEET BY THIS 
  MORNING. THE RIVER WILL FALL BELOW FLOOD STAGE LATE THIS MORNING.
* IMPACT...AT 10.0 FEET...THE INTERSECTION OF CREEK ROAD AND ROUTE 926 
  NEAR POCOPSON FLOODS UPSTREAM OF CHADDS FORD.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG   DAY TIME      CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0    8.37  THU 4 AM      CRESTED AND FALLING 
  CHADDS FORD      9.0    9.09  THU 4 AM      9.4    THU 7 AM 

&&

686 
WGUS81 KPHI 081252
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
752 AM EST THU DEC 8 2011

...THE FLOOD WARNING IS CANCELLED 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.

&&

PAC029-081322-
/O.CAN.KPHI.FL.W.0220.000000T0000Z-111208T1520Z/
/DWNP1.1.ER.111208T0447Z.111208T0715Z.111208T1121Z.NO/
752 AM EST THU DEC 8 2011

THE FLOOD WARNING IS CANCELLED FOR
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* AT 7:31 AM THURSDAY THE STAGE WAS 6.3 FEET. 
* FLOOD STAGE IS 7.0 FEET. 
* FELL BELOW FLOOD STAGE AT 6:21 AM THURSDAY.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO 3.8 FEET BY TOMORROW 
  MORNING.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0    6.31  THU 8 AM      BELOW FLOOD STAGE 

&&

KRUZDLO

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, 10:12 PM EST	River Flood Warning	PHI	Bucks	12 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.