Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 207, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2026, 2:57 PM EDT for Bucks County, Lehigh County, Northampton County, Pennsylvania; Hunterdon County, New Jersey. It was in force for 37 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 21, 2026, 2:57 PM EDT (18:57 UTC)
- Expired
- Jul 21, 2026, 3:34 PM EDT
- In force
- 37 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, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 98 km from the middle of the area, began a volume at 18:58 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 21, 2:06 PM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.0 hours before the alert went out and 205 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1211 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
124
WUUS51 KPHI 211857
SVRPHI
NJC019-PAC017-077-095-211945-
/O.NEW.KPHI.SV.W.0207.260721T1857Z-260721T1945Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
257 PM EDT Tue Jul 21 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern Hunterdon County in northwestern New Jersey...
Southeastern Lehigh County in eastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
South central Northampton County in eastern Pennsylvania...
* Until 345 PM EDT.
* At 257 PM EDT, a severe thunderstorm was located over Emmaus, or
near Allentown, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Allentown, Bethlehem, Emmaus, Quakertown, Byram, Bedminster,
Hellertown, Tinicum, Ferndale, Frenchtown, Milford, Riegelsville,
Pleasant Valley, Revere, Ottsville, Zionsville, Pipersville,
Springtown, Erwinna, and Lumberville.
This includes the following highways...
Northeast Extension between mile markers 44 and 54.
Interstate 78 in Pennsylvania between mile markers 58 and 64.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for northwestern
New Jersey...and eastern and southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 900 PM EDT for northwestern
New Jersey...and eastern and southeastern Pennsylvania.
&&
LAT...LON 4061 7520 4059 7518 4062 7516 4064 7500
4038 7499 4044 7551 4047 7556 4056 7556
TIME...MOT...LOC 1857Z 267DEG 31KT 4051 7547
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AKL2 follow-up statements
931
WWUS51 KPHI 211921
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
321 PM EDT Tue Jul 21 2026
PAC077-095-211931-
/O.CAN.KPHI.SV.W.0207.000000T0000Z-260721T1945Z/
Lehigh PA-Northampton PA-
321 PM EDT Tue Jul 21 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LEHIGH AND SOUTH
CENTRAL NORTHAMPTON COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM EDT for northwestern
New Jersey...and eastern and southeastern Pennsylvania.
LAT...LON 4039 7506 4043 7539 4051 7538 4054 7534
4058 7499 4038 7499
TIME...MOT...LOC 1921Z 265DEG 30KT 4046 7531
$$
NJC019-PAC017-211945-
/O.CON.KPHI.SV.W.0207.000000T0000Z-260721T1945Z/
Hunterdon NJ-Bucks PA-
321 PM EDT Tue Jul 21 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR SOUTHWESTERN HUNTERDON AND NORTHWESTERN BUCKS COUNTIES...
At 321 PM EDT, a severe thunderstorm was located over Quakertown, or
12 miles southeast of Allentown, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Quakertown, Byram, Bedminster, Tinicum, Ferndale, Frenchtown,
Milford, Pleasant Valley, Revere, Ottsville, Pipersville, Erwinna,
Lumberville, and Richlandtown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for northwestern
New Jersey...and eastern and southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4039 7506 4043 7539 4051 7538 4054 7534
4058 7499 4038 7499
TIME...MOT...LOC 1921Z 265DEG 30KT 4046 7531
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AKL671
WWUS51 KPHI 211934
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
334 PM EDT Tue Jul 21 2026
NJC019-PAC017-211943-
/O.CAN.KPHI.SV.W.0207.000000T0000Z-260721T1945Z/
Hunterdon NJ-Bucks PA-
334 PM EDT Tue Jul 21 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN HUNTERDON AND
NORTHWESTERN BUCKS COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM EDT for northwestern
New Jersey...and eastern and southeastern Pennsylvania.
LAT...LON 4039 7506 4043 7539 4051 7538 4054 7534
4058 7499 4038 7499
TIME...MOT...LOC 1931Z 267DEG 31KT 4047 7516
$$
AKLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 2:18 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 42 min |
| Jul 21, 3:37 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 53 min |
| Jul 21, 3:47 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 43 min |
| Jul 21, 3:58 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 47 min |
| Jul 21, 4:23 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 52 min |
| Jul 21, 4:31 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 96 min |
| Jul 21, 4:38 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 21, 4:43 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 47 min |
| Jul 21, 5:30 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 45 min |
| Jul 21, 8:49 AM EDT | Flash Flood Warning | PHI | Sussex, Warren | 2 hr |
| Jul 21, 11:01 AM EDT | Special Marine Warning | PHI | 59 min | |
| Jul 21, 11:14 AM EDT | Special Marine Warning | PHI | 46 min | |
| Jul 21, 12:07 PM EDT | Special Marine Warning | PHI | 53 min | |
| Jul 21, 1:52 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 53 min |
| Jul 21, 2:00 PM EDT | Tornado Warning | PHI | Morris | 30 min |
| Jul 21, 2:25 PM EDT | Tornado Warning | PHI | Morris | 50 min |
| Jul 21, 2:49 PM EDT | Flash Flood Warning | PHI | Morris | 3 hr |
| Jul 21, 2:57 PM EDT | Tornado Warning | PHI | Morris, Somerset | 48 min |
| Jul 21, 3:13 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 3 hr |
| Jul 21, 4:06 PM EDT | Special Marine Warning | PHI | 54 min | |
| Jul 21, 4:46 PM EDT | Special Marine Warning | PHI | 89 min | |
| Jul 21, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Monmouth, Somerset | 55 min |
| Jul 21, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 46 min |
| Jul 21, 5:30 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Jul 21, 5:43 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Jul 21, 5:49 PM EDT | Tornado Warning | PHI | Cape May | 26 min |
| Jul 21, 6:06 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 39 min |
| Jul 21, 6:07 PM EDT | Special Marine Warning | PHI | 53 min | |
| Jul 21, 6:09 PM EDT | Tornado Warning | PHI | Cape May | 36 min |
| Jul 21, 6:18 PM EDT | Special Marine Warning | PHI | 57 min | |
| Jul 21, 6:34 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 41 min |
| Jul 21, 6:41 PM EDT | Special Marine Warning | PHI | 94 min | |
| Jul 21, 6:50 PM EDT | Special Marine Warning | PHI | 85 min | |
| Jul 21, 7:06 PM EDT | Tornado Warning | PHI | Ocean | 12 min |
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.