Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Mar 11, 2026, 8:10 PM EDT for 4 counties in Pennsylvania. It was in force for 50 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
- Mar 11, 2026, 8:10 PM EDT (00:10 UTC)
- Expired
- Mar 11, 2026, 9:00 PM EDT
- In force
- 50 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Berks County, PA, Bucks County, PA, Lehigh County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 99 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 |
|---|---|---|---|
| Mar 11, 7:03 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 0.2 hours before the alert went out and 215 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
- 980 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 413 m²/s²
- 0-3 km storm-relative helicity
- 386 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
678
WUUS51 KPHI 120010
SVRPHI
PAC011-017-077-091-120100-
/O.NEW.KPHI.SV.W.0003.260312T0010Z-260312T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
810 PM EDT Wed Mar 11 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Berks County in eastern Pennsylvania...
Southeastern Lehigh County in eastern Pennsylvania...
Northwestern Montgomery County in southeastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
* Until 900 PM EDT.
* At 809 PM EDT, a severe thunderstorm was located near Birdsboro, or
9 miles east of Reading, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Pottstown, Quakertown, Perkasie, Bedminster, Tinicum, East
Greenville, Ferndale, Bally, Bechtelsville, Riegelsville, Green
Lane, Pleasant Valley, Revere, Zionsville, Ottsville, Geryville,
Pipersville, Springtown, Erwinna, and Gilbertsville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4055 7535 4054 7533 4056 7530 4060 7519
4057 7518 4058 7512 4054 7507 4045 7507
4042 7506 4026 7566 4025 7575 4026 7579
4038 7587
TIME...MOT...LOC 0009Z 250DEG 43KT 4032 7574
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich4 follow-up statements
173
WWUS51 KPHI 120025
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
825 PM EDT Wed Mar 11 2026
PAC011-120034-
/O.CAN.KPHI.SV.W.0003.000000T0000Z-260312T0100Z/
Berks PA-
825 PM EDT Wed Mar 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
eastern and southeastern Pennsylvania.
LAT...LON 4044 7553 4048 7557 4055 7535 4054 7533
4056 7530 4060 7519 4057 7518 4058 7512
4054 7507 4042 7506 4026 7568
TIME...MOT...LOC 0024Z 250DEG 43KT 4039 7551
$$
PAC017-077-091-120100-
/O.CON.KPHI.SV.W.0003.000000T0000Z-260312T0100Z/
Lehigh PA-Montgomery PA-Bucks PA-
825 PM EDT Wed Mar 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR SOUTHEASTERN LEHIGH...NORTHWESTERN MONTGOMERY AND NORTHWESTERN
BUCKS COUNTIES...
At 824 PM EDT, a severe thunderstorm was located over East
Greenville, or 14 miles south of Allentown, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Pottstown, Quakertown, Perkasie, Byram, Bedminster, Tinicum, East
Greenville, Ferndale, Riegelsville, Green Lane, Pleasant Valley,
Revere, Zionsville, Ottsville, Geryville, Pipersville, Springtown,
Erwinna, Gilbertsville, and Stowe.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4044 7553 4048 7557 4055 7535 4054 7533
4056 7530 4060 7519 4057 7518 4058 7512
4054 7507 4042 7506 4026 7568
TIME...MOT...LOC 0024Z 250DEG 43KT 4039 7551
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich534
WWUS51 KPHI 120032
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
832 PM EDT Wed Mar 11 2026
PAC091-120042-
/O.CAN.KPHI.SV.W.0003.000000T0000Z-260312T0100Z/
Montgomery PA-
832 PM EDT Wed Mar 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MONTGOMERY COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
eastern and southeastern Pennsylvania.
LAT...LON 4053 7534 4055 7531 4059 7519 4057 7518
4058 7512 4054 7507 4048 7506 4046 7507
4042 7506 4034 7536 4042 7548 4048 7551
TIME...MOT...LOC 0032Z 250DEG 43KT 4042 7538
$$
PAC017-077-120100-
/O.CON.KPHI.SV.W.0003.000000T0000Z-260312T0100Z/
Lehigh PA-Bucks PA-
832 PM EDT Wed Mar 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR SOUTHEASTERN LEHIGH AND NORTHWESTERN BUCKS COUNTIES...
At 832 PM EDT, a severe thunderstorm was located over Quakertown, or
12 miles south of Allentown, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Quakertown, Perkasie, Byram, Bedminster, Tinicum, Ferndale,
Riegelsville, Pleasant Valley, Revere, Ottsville, Zionsville,
Pipersville, Springtown, Erwinna, Sellersville, Coopersburg,
Richlandtown, and Trumbauersville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4053 7534 4055 7531 4059 7519 4057 7518
4058 7512 4054 7507 4048 7506 4046 7507
4042 7506 4034 7536 4042 7548 4048 7551
TIME...MOT...LOC 0032Z 250DEG 43KT 4042 7538
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich760
WWUS51 KPHI 120042
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
842 PM EDT Wed Mar 11 2026
PAC077-120052-
/O.CAN.KPHI.SV.W.0003.000000T0000Z-260312T0100Z/
Lehigh PA-
842 PM EDT Wed Mar 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LEHIGH COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
eastern and southeastern Pennsylvania.
LAT...LON 4036 7528 4052 7536 4058 7519 4057 7518
4058 7512 4054 7507 4048 7506 4046 7507
4042 7506
TIME...MOT...LOC 0042Z 250DEG 43KT 4046 7523
$$
PAC017-120100-
/O.CON.KPHI.SV.W.0003.000000T0000Z-260312T0100Z/
Bucks PA-
842 PM EDT Wed Mar 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHWESTERN BUCKS COUNTY...
At 842 PM EDT, a severe thunderstorm was located near Bedminster, or
15 miles south of Easton, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Perkasie, Byram, Bedminster, Tinicum, Dublin, Ferndale, Pleasant
Valley, Pipersville, Erwinna, Revere, Ottsville, and Richlandtown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4036 7528 4052 7536 4058 7519 4057 7518
4058 7512 4054 7507 4048 7506 4046 7507
4042 7506
TIME...MOT...LOC 0042Z 250DEG 43KT 4046 7523
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich762
WWUS51 KPHI 120050
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
850 PM EDT Wed Mar 11 2026
PAC017-120100-
/O.EXP.KPHI.SV.W.0003.000000T0000Z-260312T0100Z/
Bucks PA-
850 PM EDT Wed Mar 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BUCKS COUNTY WILL
EXPIRE AT 900 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southeastern Pennsylvania.
LAT...LON 4036 7528 4052 7536 4058 7519 4057 7518
4058 7512 4054 7507 4048 7506 4046 7507
4042 7506
TIME...MOT...LOC 0050Z 250DEG 43KT 3944 7561
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 11, 8:28 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 47 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 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.