Alert archive / Pennsylvania / River Flood Warnings in 2021

River Flood Warning 56, NWS Philadelphia/Mount Holly

September 1, 2021Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Sep 1, 2021, 7:53 PM EDT for Delaware County, Pennsylvania. It was in force for 13 hr.

The area

The outline as issued.

The facts

Issued
Sep 1, 2021, 7:53 PM EDT (23:53 UTC)
Expired
Sep 2, 2021, 8:37 AM EDT
In force
13 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
Minor

County Delaware County, PA

The radar

The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 23:56 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 10.39 ft at Sep 2, 2021, 2:00 AM EDT.

actionminormoderate51009/0109/0209/03
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.

189 
WGUS41 KPHI 012353
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
753 PM EDT Wed Sep 1 2021

...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.

For the Chester Creek...including Chester...Minor flooding is 
forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Additional information is available at www.weather.gov/phi.


PAC045-020615-
/O.NEW.KPHI.FL.W.0056.210901T2353Z-210902T0601Z/
/CHSP1.1.ER.210901T2340Z.210902T0100Z.210902T0200Z.NO/
753 PM EDT Wed Sep 1 2021

The National Weather Service in Mount Holly has issued a

* Flood Warning for
  the Chester Creek Near Chester.
* From this evening to late tonight.
* At 7:46 PM EDT Wednesday the stage was 8.4 feet.
* Flood stage is 8.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 7:46 PM EDT Wednesday was 8.4 feet.
* Forecast...The river is expected to rise to a crest of 8.8 feet 
  late this evening. It will then fall below flood stage late this 
  evening.
* Impact...At 7.0 feet, The creek floods adjacent open land.
* Flood History...This crest compares to a previous crest of 8.7 
  feet on 04/17/2011.

&&


             Fld   Observed           Forecasts (8 pm EDT)     
Location     Stg   Stg   Day/Time     Thu   Fri   Sat          

Chester Creek
Chester      8.0   8.4   Wed 7 pm EDT 3.2   MSG   MSG          





&&

LAT...LON 3991 7542 3985 7534 3981 7540 3987 7547

$$

NC
3 follow-up statements
357 
WGUS81 KPHI 020154
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
954 PM EDT Wed Sep 1 2021

...The Flood Warning is extended for the following rivers in 
Pennsylvania...

  Chester Creek Near Chester affecting Delaware County.

For the Chester Creek...including Chester...Minor flooding is 
forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Additional information is available at www.weather.gov/phi.


PAC045-021000-
/O.EXT.KPHI.FL.W.0056.000000T0000Z-210902T0951Z/
/CHSP1.1.ER.210901T2340Z.210902T0131Z.210902T0351Z.NO/
954 PM EDT Wed Sep 1 2021

...The Flood Warning is now in effect until late tonight...

The Flood Warning continues for
  the Chester Creek Near Chester.
* Until late tonight.
* At 9:31 PM EDT Wednesday the stage was 9.9 feet.
* Flood stage is 8.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 9:31 PM EDT Wednesday was 9.9 feet.
* Forecast...The river is expected to fall below flood stage late 
  this evening and continue falling to 3.2 feet just after midnight 
  tonight.
* Impact...At 7.0 feet, The creek floods adjacent open land.
* Impact...At 10.5 feet, Flood damage, adjacent to the creek, begins 
  in the city of Chester.
* Flood History...This crest compares to a previous crest of 9.5 
  feet on 03/13/2010.

&&


             Fld   Observed           Forecasts (unknown time) 
Location     Stg   Stg   Day/Time     d1    d2    d3           

Chester Creek
Chester      8.0   9.9   Wed 9 pm EDT MSG   MSG   MSG          





&&

LAT...LON 3991 7542 3985 7534 3981 7540 3987 7547

$$

NC
987 
WGUS81 KPHI 020741
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
341 AM EDT Thu Sep 2 2021

...The Flood Warning is extended for the following rivers in 
Pennsylvania...

  Chester Creek Near Chester affecting Delaware County.

For the Chester Creek...including Chester...Minor flooding is 
forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Additional information is available at www.weather.gov/phi.


PAC045-021715-
/O.EXT.KPHI.FL.W.0056.000000T0000Z-210902T1705Z/
/CHSP1.1.ER.210901T2340Z.210902T0531Z.210902T1105Z.NO/
341 AM EDT Thu Sep 2 2021

...The Flood Warning is now in effect until this afternoon...

The Flood Warning continues for
  the Chester Creek Near Chester.
* Until this afternoon.
* At 3:31 AM EDT Thursday the stage was 10.0 feet.
* Flood stage is 8.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 3:31 AM EDT Thursday was 10.5 feet.
* Forecast...The river is expected to fall below flood stage this 
  morning and continue falling to 3.3 feet tomorrow afternoon.
* Impact...At 7.0 feet, The creek floods adjacent open land.
* Impact...At 10.5 feet, Flood damage, adjacent to the creek, begins 
  in the city of Chester.
* Flood History...This crest compares to a previous crest of 10.4 
  feet on 04/15/2007.

&&


             Fld   Observed           Forecasts (4 am EDT)     
Location     Stg   Stg   Day/Time     Fri   Sat   Sun          

Chester Creek
Chester      8.0   10.0  Thu 3 am EDT 3.4   MSG   MSG          





&&

LAT...LON 3991 7542 3985 7534 3981 7540 3987 7547

$$

Meola
635 
WGUS81 KPHI 021237
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
837 AM EDT Thu Sep 2 2021

...The Flood Warning is cancelled for the following rivers in 
Pennsylvania...

  Chester Creek Near Chester affecting Delaware County.

PAC045-021345-
/O.CAN.KPHI.FL.W.0056.000000T0000Z-210902T1237Z/
/CHSP1.1.ER.210901T2340Z.210902T0531Z.210902T1113Z.NO/
837 AM EDT Thu Sep 2 2021

...The Flood Warning for the Chester Creek Near Chester has been 
cancelled...

The Flood Warning is cancelled for
  the Chester Creek Near Chester.
* At 8:31 AM EDT Thursday the stage was 6.8 feet.
* Flood stage is 8.0 feet.
* Forecast...The river is expected to fall to 3.3 feet tomorrow 
  afternoon.

&&


             Fld   Observed           Forecasts (9 am EDT)     
Location     Stg   Stg   Day/Time     Fri   Sat   Sun          

Chester Creek
Chester      8.0   6.8   Thu 8 am EDT 3.2   MSG   MSG          





&&

LAT...LON 3991 7542 3985 7534 3981 7540 3987 7547

$$

Kruzdlo

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 6:19 AM EDTAreal Flood AdvisoryPHIChester, Delaware116 min
Sep 1, 6:49 AM EDTFlash Flood WarningPHIChester, Delaware, Philadelphia86 min
Sep 1, 11:24 AM EDTAreal Flood AdvisoryPHIBerks, Carbon, Lehigh, Monroe, Northampton3 hr
Sep 1, 12:07 PM EDTFlash Flood WarningPHICarbon, Monroe4 hr
Sep 1, 1:29 PM EDTFlash Flood WarningPHIBerks, Lehigh6 hr
Sep 1, 2:53 PM EDTFlash Flood WarningPHIBerks, Chester, Delaware, Montgomery9 hr
Sep 1, 3:55 PM EDTRiver Flood WarningPHIMontgomery36 hr
Sep 1, 3:55 PM EDTRiver Flood WarningPHIChester, Montgomery, Philadelphia43 hr
Sep 1, 3:55 PM EDTRiver Flood WarningPHIMontgomery, Philadelphia41 hr
Sep 1, 3:55 PM EDTRiver Flood WarningPHIPhiladelphia39 hr
Sep 1, 3:55 PM EDTRiver Flood WarningPHIBerks24 hr
Sep 1, 4:02 PM EDTRiver Flood WarningPHIMonroe24 hr
Sep 1, 4:04 PM EDTAreal Flood WarningPHICarbon, Monroe, Northampton24 hr
Sep 1, 4:10 PM EDTRiver Flood WarningPHIMonroe19 hr
Sep 1, 4:12 PM EDTFlash Flood WarningPHIBerks, Bucks, Lehigh, Montgomery, Northampton7 hr
Sep 1, 4:12 PM EDTRiver Flood WarningPHILehigh, Northampton25 hr
Sep 1, 4:12 PM EDTRiver Flood WarningPHILehigh, Northampton24 hr
Sep 1, 4:12 PM EDTRiver Flood WarningPHICarbon15 hr
Sep 1, 4:13 PM EDTTornado WarningPHIChester32 min
Sep 1, 4:20 PM EDTRiver Flood WarningPHIMontgomery22 hr
Sep 1, 4:21 PM EDTRiver Flood WarningPHIBucks29 hr
Sep 1, 4:42 PM EDTFlash Flood Warning EmergencyConsiderable damage threatPHIChester, Delaware, Montgomery6 hr
Sep 1, 5:07 PM EDTRiver Flood WarningPHIChester17 hr
Sep 1, 5:13 PM EDTSevere Thunderstorm WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia47 min
Sep 1, 5:15 PM EDTTornado WarningPHIDelaware, Montgomery, Philadelphia30 min
Sep 1, 5:26 PM EDTFlash Flood WarningPHIBucks, Delaware, Montgomery, Philadelphia9 hr
Sep 1, 5:34 PM EDTTornado WarningPHIBucks, Montgomery, Philadelphia26 min
Sep 1, 5:42 PM EDTFlash Flood WarningPHIBucks10 hr
Sep 1, 5:57 PM EDTTornado WarningPHIBucks33 min
Sep 1, 6:08 PM EDTFlash Flood WarningPHIMonroe, Northampton6 hr
Sep 1, 6:20 PM EDTTornado WarningPHIBucks40 min
Sep 1, 6:22 PM EDTTornado Warning Tornado observedPHIPhiladelphia23 min
Sep 1, 6:38 PM EDTRiver Flood WarningPHIChester, Delaware26 hr
Sep 1, 6:42 PM EDTTornado WarningPHIBucks, Philadelphia33 min
Sep 1, 6:59 PM EDTSevere Thunderstorm WarningPHIBucks61 min
Sep 1, 7:04 PM EDTTornado Warning EmergencyTornado observedCatastrophic damage threatPHIBucks26 min
Sep 1, 7:05 PM EDTFlash Flood Warning EmergencyCatastrophic damage threatPHIBucks8 hr
Sep 1, 7:22 PM EDTTornado WarningPHIBucks11 min
Sep 1, 7:23 PM EDTAreal Flood WarningPHIBerks, Lehigh14 hr
Sep 1, 7:31 PM EDTFlash Flood Warning EmergencyCatastrophic damage threatPHIBucks4 hr

Nearby

River Flood Warnings in Pennsylvania, 2021Every river flood warning in 2021

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.