Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 271, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2026, 8:10 PM EDT for Hunterdon County, New Jersey; Bucks County, Montgomery County, Pennsylvania. It was in force for 39 min. 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, 8:10 PM EDT (00:10 UTC)
- Expired
- Jul 28, 2026, 8:49 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 89 km from the middle of the area, began a volume at 00:11 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 28, 12:51 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 28, 4:20 PM EDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 0.2 hours before the alert went out and 207 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
- 325 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 775 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
990
WUUS51 KPHI 290010
SVRPHI
NJC019-PAC017-091-290115-
/O.NEW.KPHI.SV.W.0271.260729T0010Z-260729T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
810 PM EDT Tue Jul 28 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Hunterdon County in northwestern New Jersey...
Northwestern Montgomery County in southeastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
* Until 915 PM EDT.
* At 808 PM EDT, severe thunderstorms were located along a line
extending from Milford to Ottsville to near Geryville, moving east
at 10 mph.
HAZARD...60 mph wind gusts.
SOURCE...Public. At 755 PM EDT, video was shared of estimated wind
gusts of at least 60 mph in Quakertown.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Lansdale, Quakertown, Perkasie, Doylestown, Byram, Souderton,
Bedminster, Chalfont, Tinicum, High Bridge, Hatfield, East
Greenville, Clinton, New Hope, Dublin, Ferndale, Frenchtown,
Milford, Riegelsville, and Stockton.
This includes the following highways...
Northeast Extension between mile markers 29 and 44.
Interstate 78 in New Jersey between mile markers 11 and 18.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM EDT for southeastern
Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
A Tornado Watch remains in effect until 1000 PM EDT for southeastern
Pennsylvania.
&&
LAT...LON 4035 7561 4063 7513 4068 7486 4038 7492
4021 7536
TIME...MOT...LOC 0008Z 266DEG 7KT 4058 7510 4045 7516 4038 7543
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL2 follow-up statements
646
WWUS51 KPHI 290029
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
829 PM EDT Tue Jul 28 2026
NJC019-PAC017-091-290115-
/O.CON.KPHI.SV.W.0271.000000T0000Z-260729T0115Z/
Hunterdon NJ-Montgomery PA-Bucks PA-
829 PM EDT Tue Jul 28 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR CENTRAL HUNTERDON...NORTHWESTERN MONTGOMERY AND NORTHWESTERN
BUCKS COUNTIES...
At 829 PM EDT, severe thunderstorms were located along a line
extending from near Milford to Tinicum to near Quakertown, moving
east at 10 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Lansdale, Quakertown, Perkasie, Doylestown, Byram, Souderton,
Bedminster, Chalfont, Tinicum, High Bridge, Hatfield, East
Greenville, Clinton, New Hope, Dublin, Ferndale, Frenchtown, Milford,
Riegelsville, and Stockton.
This includes the following highways...
Northeast Extension between mile markers 29 and 44.
Interstate 78 in New Jersey between mile markers 11 and 18.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM EDT for southeastern
Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4035 7561 4063 7513 4068 7486 4038 7492
4021 7536
TIME...MOT...LOC 0029Z 266DEG 7KT 4058 7505 4045 7511 4038 7538
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL932
WWUS51 KPHI 290049
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
849 PM EDT Tue Jul 28 2026
NJC019-PAC017-091-290059-
/O.CAN.KPHI.SV.W.0271.000000T0000Z-260729T0115Z/
Hunterdon NJ-Montgomery PA-Bucks PA-
849 PM EDT Tue Jul 28 2026
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL HUNTERDON...
NORTHWESTERN MONTGOMERY AND NORTHWESTERN BUCKS COUNTIES IS
CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. However heavy rain is
still possible with these thunderstorms.
A Tornado Watch remains in effect until 1000 PM EDT for southeastern
Pennsylvania.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northwestern New Jersey.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4035 7561 4063 7513 4068 7486 4038 7492
4021 7536
TIME...MOT...LOC 0047Z 266DEG 7KT 4058 7500 4045 7506 4038 7533
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 10:39 PM EDT | Flash Flood Warning | PHI | Morris | 4 hr |
| Jul 28, 11:36 PM EDT | Areal Flood Warning | PHI | Hunterdon, Warren | 4 hr |
| Jul 28, 11:59 PM EDT | Flash Flood Warning | PHI | Monmouth, Ocean | 4 hr |
| Jul 29, 12:56 AM EDT | Flash Flood Warning | PHI | Ocean | 3 hr |
| Jul 28, 9:03 PM EDT | Flash Flood Warning | PHI | Berks, Montgomery | 3 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2026Severe Thunderstorm Warnings in New Jersey, 2026Every severe thunderstorm 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.