Alert archive / Pennsylvania / River Flood Warnings in 2009

River Flood Warning 36, NWS Philadelphia/Mount Holly

December 26, 2009Chester County, Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Dec 26, 2009, 2:45 PM EST for Chester County, Delaware County, Pennsylvania. It took effect at Dec 26, 2009, 7:00 PM EST. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued: Dec 26, 2009, 2:45 PM EST (19:45 UTC)
In effect from: Dec 26, 2009, 7:00 PM EST
Expired: Dec 27, 2009, 7:54 AM EST
In force: 13 hr
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Minor

Counties Chester County, PA, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 99 km from the middle of the area, began a volume at 19:44 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 Brandywine Creek at Chadds Ford (CDFP1). The gauge peaked at 9.72 ft at Dec 27, 2009, 12:00 AM EST.

Action stage: 8 ft
Minor stage: 9 ft
Moderate stage: 11 ft
Major stage: 13 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01481000, 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.

000 
WGUS41 KPHI 261945
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
245 PM EST SAT DEC 26 2009

...THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A FLOOD 
WARNING 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.

&&

PAC029-045-270145-
/O.NEW.KPHI.FL.W.0036.091227T0000Z-091227T0600Z/
/CDFP1.1.ER.091227T0000Z.091227T0000Z.091227T0000Z.NO/
245 PM EST SAT DEC 26 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE BRANDYWINE CREEK AT CHADDS FORD.
* FROM THIS EVENING TO LATE TONIGHT...OR UNTIL THE WARNING IS CANCELLED.
* AT 2:30 PM SATURDAY THE STAGE WAS 8.4 FEET. 
* MINOR FLOODING IS FORECAST. 
* FLOOD STAGE IS 9.0 FEET. 
* FORECAST...THE RIVER IS EXPECTED TO RISE TO NEAR FLOOD STAGE THIS 
  EVENING.
* 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
  CHADDS FORD      9.0    8.45  SAT 2 PM     9.0  SAT 7 PM 

&&

3 follow-up statements

000 
WGUS81 KPHI 270128
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
828 PM EST SAT DEC 26 2009

...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.

&&

PAC029-045-271128-
/O.EXT.KPHI.FL.W.0036.000000T0000Z-091227T1440Z/
/CDFP1.1.ER.091226T2251Z.091227T0600Z.091227T0840Z.NO/
828 PM EST SAT DEC 26 2009

THE FLOOD WARNING CONTINUES FOR 
  THE BRANDYWINE CREEK AT CHADDS FORD.
* UNTIL SUNDAY MORNING...OR UNTIL THE WARNING IS CANCELLED.
* AT 8:00 PM SATURDAY THE STAGE WAS 9.5 FEET. 
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FLOOD STAGE IS 9.0 FEET. 
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 9.8 FEET 
  OVERNIGHT. THE RIVER WILL FALL BELOW FLOOD STAGE EARLY TOMORROW.
* 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
  CHADDS FORD      9.0    9.53  SAT 8 PM     9.8  SUN 1 AM 

&&

000 
WGUS81 KPHI 271101
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
601 AM EST SUN DEC 27 2009

...THE FLOOD WARNING CONTINUES FOR THE BRANDYWINE CREEK AT CHADDS
FORD...
  
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-045-271713-
/O.EXT.KPHI.FL.W.0036.000000T0000Z-091227T1713Z/
/CDFP1.1.ER.091226T2251Z.091227T0600Z.091227T1113Z.NO/
601 AM EST SUN DEC 27 2009

THE FLOOD WARNING CONTINUES FOR 
  THE BRANDYWINE CREEK AT CHADDS FORD.
* UNTIL THIS AFTERNOON...OR UNTIL THE WARNING IS CANCELLED.
* AT 5:45 AM, THE STAGE WAS 9.3 FEET AND FALLING. 
* FLOOD STAGE IS 9.0 FEET. 
* FORECAST...THE RIVER LEVEL WILL FALL BACK BELOW FLOOD STAGE THIS
  MORNING.
* IMPACT...AT 10.0 FEET, THE INTERSECTION OF CREEK ROAD AND ROUTE
  926 NEAR POCOPSON FLOODS.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  CHADDS FORD      9.0    9.30  SUN 545 AM    CRESTED

&&

IOVINO

000 
WGUS81 KPHI 271254
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
754 AM EST SUN DEC 27 2009

...THE FLOOD WARNING IS CANCELLED 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.

&&

PAC029-045-271324-
/O.CAN.KPHI.FL.W.0036.000000T0000Z-091227T1713Z/
/CDFP1.1.ER.091226T2251Z.091227T0600Z.091227T1149Z.NO/
754 AM EST SUN DEC 27 2009

* AT  7:30 AM SUNDAY THE STAGE WAS 8.7 FEET. 
* NO FLOODING IS CURRENTLY FORECAST.
* FLOOD STAGE IS 9.0 FEET. 
* 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
  CHADDS FORD      9.0    8.73  SUN 7 AM     7.0  SUN 1 PM 

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 26, 7:42 AM EST	Coastal Flood Advisory	PHI	Delaware, Philadelphia	15 hr
Dec 26, 10:28 AM EST	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	20 hr
Dec 26, 12:31 PM EST	River Flood Warning	PHI	Chester	12 hr
Dec 26, 12:34 PM EST	River Flood Warning	PHI	Delaware	9 hr
Dec 26, 2:42 PM EST	River Flood Warning	PHI	Bucks	20 hr

Nearby

River Flood Warnings in Pennsylvania, 2009 Every river flood warning in 2009

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.