Alert archive / Pennsylvania / River Flood Warnings in 2012

River Flood Warning 4, NWS Philadelphia/Mount Holly

September 3, 2012Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Sep 3, 2012, 6:41 PM EDT for Delaware County, Pennsylvania. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Sep 3, 2012, 6:41 PM EDT (22:41 UTC)
Expired
Sep 3, 2012, 8:48 PM EDT
In force
2 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 22:41 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 8.92 ft at Sep 3, 2012, 7:00 PM EDT.

actionminormoderate51009/0309/0409/05
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.

917 
WGUS41 KPHI 032241
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
641 PM EDT MON SEP 3 2012

...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.

&&

PAC045-040441-
/O.NEW.KPHI.FL.W.0004.120903T2241Z-120904T0449Z/
/CHSP1.1.ER.120903T2219Z.120903T2231Z.120903T2249Z.NO/
641 PM EDT MON SEP 3 2012

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  6:31 PM MONDAY THE STAGE WAS 8.5 FEET. 
* FLOOD STAGE IS 8.0 FEET.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE BY THIS 
  EVENING.
* 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    8.51  MON 7 PM     cresting soon. 

&&
1 follow-up statement
620 
WGUS81 KPHI 040048
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
848 PM EDT MON SEP 3 2012

...THE FLOOD WARNING IS CANCELLED 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.

&&

PAC045-040118-
/O.CAN.KPHI.FL.W.0004.000000T0000Z-120904T0449Z/
/CHSP1.1.ER.120903T2219Z.120903T2330Z.120904T0025Z.NO/
848 PM EDT MON SEP 3 2012

THE FLOOD WARNING IS CANCELLED FOR
  THE CHESTER CREEK NEAR CHESTER.
* AT  8:31 PM MONDAY THE STAGE WAS 7.8 FEET. 
* FLOOD STAGE IS 8.0 FEET.
* FELL BELOW FLOOD STAGE AT  8:25 PM MONDAY.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO 4.7 FEET BY WEDNESDAY MORNING.
* 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    7.88  MON 9 PM     

&&

HEAVENER

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 3, 12:24 AM EDTAreal Flood AdvisoryPHIChester, Delaware3 hr
Sep 3, 12:58 AM EDTFlash Flood WarningPHIChester, Delaware5 hr
Sep 3, 4:19 AM EDTRiver Flood WarningPHIDelaware91 min
Sep 3, 4:44 AM EDTAreal Flood AdvisoryPHIChester, Montgomery3 hr
Sep 3, 6:24 AM EDTAreal Flood WarningPHIChester4 hr
Sep 3, 8:05 AM EDTAreal Flood AdvisoryPHIChester, Delaware, Montgomery, Philadelphia3 hr
Sep 3, 8:23 AM EDTFlash Flood WarningPHIDelaware82 min
Sep 3, 9:15 AM EDTFlash Flood WarningPHIChester, Delaware, Montgomery3 hr
Sep 3, 10:28 AM EDTSpecial Weather StatementPHIPhiladelphia62 min
Sep 3, 11:14 AM EDTAreal Flood AdvisoryPHIBucks, Montgomery, Philadelphia2 hr
Sep 3, 12:04 PM EDTAreal Flood WarningPHIChester4 hr
Sep 3, 2:44 PM EDTAreal Flood AdvisoryPHIChester119 min
Sep 3, 3:00 PM EDTFlash Flood WatchPHIDelaware, Philadelphia49 hr
Sep 3, 5:27 PM EDTAreal Flood WarningPHIDelaware3 hr

Nearby

River Flood Warnings in Pennsylvania, 2012Every river flood warning in 2012

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.