Alert archive / Pennsylvania / River Flood Warnings in 2025

River Flood Warning 8, NWS Philadelphia/Mount Holly

July 9, 2025Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Jul 9, 2025, 9:57 PM EDT for Delaware County, Pennsylvania. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jul 9, 2025, 9:57 PM EDT (01:57 UTC)
Expired: Jul 10, 2025, 4:45 AM EDT
In force: 7 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 02:00 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).

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.

353 
WGUS41 KPHI 100157
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
957 PM EDT Wed Jul 9 2025

...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.

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

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

The next statement will be issued Thursday morning at 830 AM EDT.

&&

PAC045-101230-
/O.NEW.KPHI.FL.W.0008.250710T0157Z-250710T1222Z/
/CHSP1.1.ER.250710T0306Z.250710T0500Z.250710T0621Z.NO/
957 PM EDT Wed Jul 9 2025

...FLOOD WARNING IN EFFECT FROM THIS EVENING TO TOMORROW MORNING...

* WHAT...Minor flooding is forecast.

* WHERE...Chester Creek near Chester.

* WHEN...From this evening to tomorrow morning.

* IMPACTS...At 7.0 feet, The creek floods adjacent open land.

* ADDITIONAL DETAILS...
  - At 9:47 PM EDT Wednesday the stage was 7.3 feet.
  - Forecast...The river is expected to rise above flood stage
    late this evening to a crest of 9.4 feet just after midnight
    tonight. It will then fall below flood stage just after
    midnight tonight.
  - Flood stage is 8.0 feet.
  - Flood History...This crest compares to a previous crest of
    9.4 feet on 01/25/2020.
  - http://www.weather.gov/safety/flood

&&

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

Chester Creek
Chester      8.0   7.3   Wed 9 pm EDT 2.8   MSG   MSG          


&&

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


$$

Hoeflich

2 follow-up statements

256 
WGUS81 KPHI 100223
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
1023 PM EDT Wed Jul 9 2025

...The Flood Warning continues 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...

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

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

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

The next statement will be issued Thursday morning at 615 AM EDT.

&&

PAC045-101015-
/O.EXT.KPHI.FL.W.0008.000000T0000Z-250710T1013Z/
/CHSP1.1.ER.250710T0207Z.250710T0300Z.250710T0413Z.NO/
1023 PM EDT Wed Jul 9 2025

...FLOOD WARNING NOW IN EFFECT UNTIL TOMORROW MORNING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Chester Creek near Chester.

* WHEN...Until tomorrow morning.

* IMPACTS...At 7.0 feet, The creek floods adjacent open land.

* ADDITIONAL DETAILS...
  - At 10:16 PM EDT Wednesday the stage was 8.2 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 10:16 PM EDT Wednesday was 8.2 feet.
  - Forecast...The river is expected to rise to a crest of 8.4
    feet late this evening. It will then fall below flood stage
    just after midnight tonight.
  - Flood stage is 8.0 feet.
  - Flood History...This crest compares to a previous crest of
    8.6 feet on 09/18/2004.
  - http://www.weather.gov/safety/flood

&&

             Fld   Observed           Forecasts (10 pm EDT)    
Location     Stg   Stg   Day/Time     Thu   Fri   Sat          

Chester Creek
Chester      8.0   8.2   Wed 10 pm ED 2.8   MSG   MSG          


&&

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


$$

Hoeflich

237 
WGUS81 KPHI 100845 RRA
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
445 AM EDT Thu Jul 10 2025

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

  Chester Creek Near Chester affecting Delaware County.

PAC045-100945-
/O.CAN.KPHI.FL.W.0008.000000T0000Z-250710T0845Z/
/CHSP1.1.ER.250710T0207Z.250710T0516Z.250710T0603Z.NO/
445 AM EDT Thu Jul 10 2025

...FLOOD WARNING IS CANCELLED...

The Flood Warning is cancelled for
  the Chester Creek Near Chester.

* ADDITIONAL DETAILS...
  - At 4:16 AM EDT Thursday the stage was 5.1 feet.
  - Forecast...The river is expected to fall to 2.8 feet just
    after midnight tonight.
  - http://www.weather.gov/safety/flood

&&

             Fld   Observed           Forecasts (2 am EDT)     
Location     Stg   Stg   Day/Time     Fri   Sat   Sun          

Chester Creek
Chester      8.0   5.1   Thu 4 am EDT 2.8   MSG   MSG          


&&

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


$$

RCM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 8:00 PM EDT	Flash Flood Warning Considerable damage threat	PHI	Chester, Delaware, Montgomery, Philadelphia	4 hr
Jul 9, 8:32 PM EDT	Flash Flood Warning Considerable damage threat	PHI	Delaware	4 hr
Jul 9, 8:47 PM EDT	Flash Flood Warning	PHI	Bucks, Philadelphia	2 hr
Jul 9, 10:35 PM EDT	Areal Flood Warning	PHI	Chester	4 hr
Jul 9, 10:46 PM EDT	River Flood Warning	PHI	Chester, Delaware	8 hr
Jul 9, 11:48 PM EDT	Areal Flood Warning	PHI	Delaware	4 hr

Nearby

River Flood Warnings in Pennsylvania, 2025 Every river flood warning in 2025

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.