Alert archive / Pennsylvania / Flash Flood Warnings in 2026
Flash Flood Warning 109, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 7, 2026, 4:04 PM EDT for 5 counties in Pennsylvania. It was in force for 2 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
- Aug 7, 2026, 4:04 PM EDT (20:04 UTC)
- Expired
- Aug 7, 2026, 6:30 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Berks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 146 km from the middle of the area, began a volume at 20:07 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, 8.1 hours before the alert went out and 235 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.
- Mixed-layer CAPE
- 514 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 1052 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
816
WGUS51 KPHI 072004
FFWPHI
PAC011-025-077-089-095-080015-
/O.NEW.KPHI.FF.W.0109.260807T2004Z-260808T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
404 PM EDT Fri Aug 7 2026
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northeastern Berks County in eastern Pennsylvania...
Northwestern Lehigh County in eastern Pennsylvania...
West Central Northampton County in eastern Pennsylvania...
Southern Carbon County in northeastern Pennsylvania...
Southern Monroe County in northeastern Pennsylvania...
* Until 815 PM EDT.
* At 404 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1.5 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...
Lehighton, Northampton, Palmerton, Kutztown, Jim Thorpe,
Slatington, Fleetwood, Nesquehoning, Walnutport, Lenhartsville,
Jordan Valley and New Tripoli.
This includes the following highways...
Northeast Extension between mile markers 60 and 79.
Interstate 78 in Pennsylvania between mile markers 33 and 48.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4060 7597 4061 7600 4064 7599 4069 7584
4074 7576 4084 7591 4087 7589 4089 7549
4072 7542 4041 7592
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1.5-2.5 INCHES IN 1 HOUR
$$
Cooper2 follow-up statements
766
WGUS71 KPHI 072041
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
441 PM EDT Fri Aug 7 2026
PAC011-025-077-089-095-080015-
/O.CON.KPHI.FF.W.0109.000000T0000Z-260808T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-Carbon PA-Lehigh PA-Monroe PA-Northampton PA-
441 PM EDT Fri Aug 7 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT THIS
EVENING FOR NORTHEASTERN BERKS, NORTHWESTERN LEHIGH, WEST CENTRAL
NORTHAMPTON, SOUTHERN CARBON AND SOUTHERN MONROE COUNTIES...
At 441 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1.5 and 2.5 inches of rain have
fallen. Additional rainfall amounts up to 0.5 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Lehighton, Northampton, Palmerton, Kutztown, Jim Thorpe,
Slatington, Fleetwood, Nesquehoning, Walnutport, Lenhartsville,
Jordan Valley and New Tripoli.
This includes the following highways...
Northeast Extension between mile markers 60 and 79.
Interstate 78 in Pennsylvania between mile markers 33 and 49.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4060 7597 4061 7600 4064 7599 4069 7584
4074 7576 4084 7591 4087 7589 4089 7549
4072 7542 4041 7592
FLASH FLOOD...RADAR INDICATED
$$
Cooper546
WGUS71 KPHI 072230
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
630 PM EDT Fri Aug 7 2026
PAC011-025-077-089-095-072240-
/O.CAN.KPHI.FF.W.0109.000000T0000Z-260808T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-Carbon PA-Lehigh PA-Monroe PA-Northampton PA-
630 PM EDT Fri Aug 7 2026
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN BERKS,
NORTHWESTERN LEHIGH, WEST CENTRAL NORTHAMPTON, SOUTHERN CARBON AND
SOUTHERN MONROE COUNTIES...
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.
&&
LAT...LON 4060 7597 4061 7600 4064 7599 4069 7584
4074 7576 4084 7591 4087 7589 4089 7549
4072 7542 4041 7592
$$
CooperThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 2:38 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 50 min |
| Aug 7, 2:53 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 67 min |
| Aug 7, 2:58 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 62 min |
| Aug 7, 3:16 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 44 min |
| Aug 7, 3:25 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Aug 7, 3:25 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 65 min |
| Aug 7, 3:37 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 3 hr |
| Aug 7, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Monroe, Northampton | 54 min |
| Aug 7, 4:24 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 4 hr |
| Aug 7, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 55 min |
| Aug 7, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 64 min |
| Aug 7, 5:01 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Northampton | 3 hr |
| Aug 7, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 44 min |
| Aug 7, 5:34 PM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Aug 7, 7:19 PM EDT | Areal Flood Warning | PHI | Monroe, Northampton | 4 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2026Every 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.