Alert archive / Pennsylvania / River Flood Warnings in 2011

River Flood Warning 146, NWS Philadelphia/Mount Holly

September 6, 2011Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Sep 6, 2011, 7:41 PM EDT for Delaware County, Pennsylvania. It took effect at Sep 6, 2011, 8:29 PM EDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Sep 6, 2011, 7:41 PM EDT (23:41 UTC)
In effect from: Sep 6, 2011, 8:29 PM EDT
Expired: Sep 7, 2011, 12:16 AM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Minor

County Delaware County, PA

The radar

The Philadelphia radar (KDIX), 84 km from the middle of the area, began a volume at 23:43 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 Chester Creek near Chester (CHSP1). The gauge peaked at 9.32 ft at Sep 7, 2011, 5:00 AM EDT.

Action stage: 7 ft
Minor stage: 8 ft
Moderate stage: 10 ft
Major stage: 14 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01477000, 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.

933 
WGUS41 KPHI 062341
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
741 PM EDT TUE SEP 6 2011

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

  CHESTER CREEK NEAR CHESTER AFFECTING DELAWARE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC045-070541-
/O.NEW.KPHI.FL.W.0146.110907T0029Z-110907T0921Z/
/CHSP1.1.ER.110907T0029Z.110907T0200Z.110907T0321Z.NO/
741 PM EDT TUE SEP 6 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE CHESTER CREEK NEAR CHESTER.
* UNTIL LATE TONIGHT...OR UNTIL THE WARNING IS CANCELLED.
* AT 7:15 PM TUESDAY THE STAGE WAS 6.9 FEET. 
* FLOOD STAGE IS 8.0 FEET.
* MINOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE BY THIS EVENING AND CONTINUE TO RISE
  TO NEAR 8.7 FEET BY TONIGHT. THE RIVER WILL FALL BELOW FLOOD STAGE LATER 
  TONIGHT.
* IMPACT...AT 10.5 FEET...FLOOD DAMAGE BEGINS IN THE CITY OF CHESTER.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

CHESTER CREEK
  CHESTER          8.0    6.86  TUE 7 PM     8.7  TUE 10 PM

&&

1 follow-up statement

078 
WGUS41 KPHI 070416
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1216 AM EDT WED SEP 7 2011

  EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN AFFECTING CHESTER 
  COUNTY
  CHRISTINA RIVER AT COOCHS BRIDGE AFFECTING NEW CASTLE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

DEC003-071016-
/O.EXT.KPHI.FL.W.0140.000000T0000Z-110907T1222Z/
/CHBD1.2.ER.110906T2127Z.110907T0216Z.110907T0622Z.NO/
1216 AM EDT WED SEP 7 2011

THE FLOOD WARNING CONTINUES FOR 
  THE CHRISTINA RIVER AT COOCHS BRIDGE.
* UNTIL THIS MORNING...OR UNTIL THE WARNING IS CANCELLED.
* AT 12:01 AM WEDNESDAY THE STAGE WAS 11.6 FEET. 
* FLOOD STAGE IS 10.5 FEET. 
* MODERATE FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE BY 
  AFTER MIDNIGHT THIS MORNING.
* IMPACT...AT 10.0 FEET...FLOODING BEGINS IN THE TOWN OF CHRISTIANA.

$$

PAC029-071016-
/O.EXT.KPHI.FL.W.0145.000000T0000Z-110907T1305Z/
/DWNP1.1.ER.110907T0039Z.110907T0330Z.110907T0705Z.NO/
1216 AM EDT WED SEP 7 2011

THE FLOOD WARNING CONTINUES FOR 
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* UNTIL THIS MORNING...OR UNTIL THE WARNING IS CANCELLED.
* AT 11:45 PM TUESDAY THE STAGE WAS 8.1 FEET. 
* FLOOD STAGE IS 7.0 FEET. 
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL FALL TO BELOW FLOOD STAGE BY 
  EARLY THIS MORNING.


$$

PAC045-070446-
/O.CAN.KPHI.FL.W.0146.000000T0000Z-110907T0921Z/
/CHSP1.1.ER.110907T0028Z.110907T0215Z.110907T0315Z.NO/
1216 AM EDT WED SEP 7 2011

* AT 12:00 AM WEDNESDAY THE STAGE WAS 7.4 FEET. 
* FLOOD STAGE IS 8.0 FEET. 
* NO FLOODING IS CURRENTLY FORECAST.
* IMPACT...AT 10.5 FEET...FLOOD DAMAGE BEGINS IN THE CITY OF CHESTER.

$$

DEC003-070446-
/O.CAN.KPHI.FL.W.0148.000000T0000Z-110907T0936Z/
/DPKD1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1216 AM EDT WED SEP 7 2011

* AT 11:46 PM TUESDAY THE STAGE WAS 12.6 FEET. 
* FLOOD STAGE IS 13.0 FEET. 
* NO FLOODING IS CURRENTLY FORECAST.
* IMPACT...AT 13.3 FEET...DELAWARE ROUTE 7 BEGINS TO FLOOD.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

CHESTER CREEK
  CHESTER          8.0    7.44  WED 12 AM    7.4  WED 1 AM 

CHRISTINA RIVER
  COOCHS BRIDGE    10.5   11.64  WED 12 AM   11.2  WED 1 AM 

WHITE CLAY CREEK
  NEWARK           13.0   12.59  WED 12 AM   12.2  WED 1 AM 

BRANDYWINE CREEK
  DOWNINGTOWN      7.0    8.13  WED 12 AM    8.1  WED 1 AM 

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 5, 8:19 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	116 min
Sep 5, 9:32 PM EDT	Areal Flood Warning	PHI	Montgomery	9 hr
Sep 5, 10:18 PM EDT	Flash Flood Warning	PHI	Lehigh, Northampton	4 hr
Sep 5, 10:53 PM EDT	Areal Flood Advisory	PHI	Chester, Montgomery	3 hr
Sep 5, 11:04 PM EDT	Areal Flood Advisory	PHI	Bucks	6 hr
Sep 5, 11:25 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Sep 6, 12:22 AM EDT	Areal Flood Advisory	PHI	Delaware, Philadelphia	3 hr
Sep 6, 1:42 AM EDT	Areal Flood Advisory	PHI	Chester, Montgomery	3 hr
Sep 6, 2:09 AM EDT	Areal Flood Advisory	PHI	Lehigh, Northampton	3 hr
Sep 6, 3:40 AM EDT	Areal Flood Warning	PHI	Berks	3 hr
Sep 6, 5:43 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	3 hr
Sep 6, 5:49 PM EDT	Areal Flood Warning	PHI	Philadelphia	20 hr
Sep 6, 6:10 PM EDT	Areal Flood Warning	PHI	Bucks, Monroe, Northampton	71 hr
Sep 6, 6:32 PM EDT	Areal Flood Warning	PHI	Montgomery	26 hr
Sep 6, 6:38 PM EDT	Areal Flood Warning	PHI	Montgomery, Philadelphia	23 hr
Sep 6, 6:44 PM EDT	Areal Flood Warning	PHI	Chester, Delaware	15 hr
Sep 6, 6:48 PM EDT	Areal Flood Warning	PHI	Bucks	31 hr
Sep 6, 7:03 PM EDT	River Flood Warning	PHI	Chester	16 hr
Sep 6, 7:52 PM EDT	River Flood Warning	PHI	Bucks	52 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.