Flash Flood Warning 80, NWS Philadelphia/Mount Holly

Issued

Jul 28, 2026, 7:24 PM EDT (23:24 UTC)

Expired

Jul 28, 2026, 11:30 PM EDT

In force

4 hr

Issued by

NWS Philadelphia/Mount Holly

Area

Storm-based polygon

Flood severity

None

County Chester County, PA

The Philadelphia radar (KDIX), 126 km from the middle of the area, began a volume at 23:25 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

214 
WGUS51 KPHI 282324
FFWPHI
PAC029-290330-
/O.NEW.KPHI.FF.W.0080.260728T2324Z-260729T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
724 PM EDT Tue Jul 28 2026

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Central Chester County in southeastern Pennsylvania...

* Until 1130 PM EDT.

* At 724 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2.5 inches of 
  rain have fallen. The expected rainfall rate is 1.5 to 2.5 inches 
  in 1 hour. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets, and underpasses as well as other
           drainage and low lying areas.

* Some locations that may experience flash flooding include...
  West Chester, Coatesville, Downingtown, Parkesburg, Honey Brook, 
  Elverson, Glenmoore, Marshallton, Lionville, Lionville-Marchwood, 
  Chester Springs and West Goshen.

This includes Pennsylvania Turnpike between mile markers 301 and 317.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3992 7600 3993 7600 3993 7598 3995 7599
      4004 7593 4008 7594 4011 7594 4014 7587
      4019 7579 4009 7557 3996 7555 3991 7600

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1.5-2.5 INCHES IN 1 HOUR

$$

AKL

978 
WGUS71 KPHI 290002
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
802 PM EDT Tue Jul 28 2026

PAC029-290330-
/O.CON.KPHI.FF.W.0080.000000T0000Z-260729T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chester PA-
802 PM EDT Tue Jul 28 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT THIS 
EVENING FOR CENTRAL CHESTER COUNTY...

At 802 PM EDT, emergency management reported residents are unable to 
exit their homes along Reeceville Road in West Brandywine. Between 1 
and 2.5 inches of rain have fallen. The expected rainfall rate is up 
to 1 inch in 1 hour. Additional rainfall amounts up to 1 inch are 
possible in the warned area. Flash flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management reported.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets, and underpasses as well as other
         drainage and low lying areas.

Some locations that may experience flash flooding include...
  West Chester, Coatesville, Downingtown, Parkesburg, Honey Brook, 
  Elverson, Glenmoore, Marshallton, Lionville, Lionville-Marchwood, 
  Chester Springs and West Goshen.

This includes Pennsylvania Turnpike between mile markers 301 and 317.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3992 7600 3993 7600 3993 7598 3995 7599
      4004 7593 4008 7594 4011 7594 4014 7587
      4019 7579 4009 7557 3996 7555 3991 7600

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...1 INCH IN 1 HOUR

$$

AKL

197 
WGUS71 KPHI 290325
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
1125 PM EDT Tue Jul 28 2026

PAC029-290335-
/O.EXP.KPHI.FF.W.0080.000000T0000Z-260729T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chester PA-
1125 PM EDT Tue Jul 28 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 1130 PM EDT THIS EVENING FOR 
CENTRAL CHESTER COUNTY...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

A Flood Watch remains in effect until 200 PM EDT Wednesday for 
portions of northern Delaware, New Jersey, and Pennsylvania.

&&

LAT...LON 3992 7600 3993 7600 3993 7598 3995 7599
      4004 7593 4008 7594 4011 7594 4014 7587
      4019 7579 4009 7557 3996 7555 3991 7600

$$

Hoeflich

Flash Flood Warnings in Pennsylvania, 2026Every flash flood warning in 2026

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.