Alert archive / Pennsylvania / Flash Flood Warnings in 2026

Flash Flood Warning 76, NWS Philadelphia/Mount Holly

July 28, 2026Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 28, 2026, 5:55 PM EDT for Berks County, Pennsylvania. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 28, 2026, 5:55 PM EDT (21:55 UTC)
Expired: Jul 28, 2026, 8:46 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 136 km from the middle of the area, began a volume at 21:56 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.9 hours before the alert went out and 208 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 710 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 968 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted.

461 
WGUS51 KPHI 282155
FFWPHI
PAC011-290200-
/O.NEW.KPHI.FF.W.0076.260728T2155Z-260729T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Central Berks County in eastern Pennsylvania...

* Until 1000 PM EDT.

* At 555 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. 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...
  Reading, Wyomissing, Kutztown, Fleetwood, Laureldale, Leesport, 
  Lyons, Spring Ridge, Shillington, West Reading, Mount Penn and 
  Kenhorst.

This includes Interstate 176 in Pennsylvania between mile markers 10 
and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4040 7603 4049 7595 4052 7576 4046 7566
      4038 7575 4028 7591 4035 7602

FLASH FLOOD...RADAR INDICATED

$$

AKL

1 follow-up statement

568 
WGUS71 KPHI 290046
FFSPHI

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

PAC011-290056-
/O.CAN.KPHI.FF.W.0076.000000T0000Z-260729T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-
846 PM EDT Tue Jul 28 2026

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL BERKS COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose an 
imminent 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 4040 7603 4049 7595 4052 7576 4046 7566
      4038 7575 4028 7591 4035 7602

$$

AKL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 8:01 PM EDT	Severe Thunderstorm Warning	PHI	Chester	23 min
Jul 28, 1:02 PM EDT	Flash Flood Warning	PHI	Lehigh, Monroe, Northampton	4 hr
Jul 28, 1:22 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	38 min
Jul 28, 1:31 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	44 min
Jul 28, 1:49 PM EDT	Tornado Warning	PHI	Monroe, Northampton	26 min
Jul 28, 2:15 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	45 min
Jul 28, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	15 min
Jul 28, 5:22 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	34 min
Jul 28, 5:29 PM EDT	Severe Thunderstorm Warning	PHI	Chester	61 min
Jul 28, 5:47 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	43 min
Jul 28, 6:16 PM EDT	Tornado Warning	PHI	Chester	29 min
Jul 28, 6:17 PM EDT	Flash Flood Warning	PHI	Bucks, Lehigh, Northampton	6 hr
Jul 28, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	67 min
Jul 28, 6:46 PM EDT	Tornado Warning	PHI	Delaware	29 min
Jul 28, 6:56 PM EDT	Flash Flood Warning	PHI	Bucks, Lehigh, Northampton	5 hr
Jul 28, 7:06 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	54 min
Jul 28, 7:08 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	35 min
Jul 28, 7:11 PM EDT	Flash Flood Warning	PHI	Delaware, Philadelphia	3 hr
Jul 28, 7:24 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 28, 7:31 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	44 min
Jul 28, 7:55 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery	4 hr

Nearby

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

Sources

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