Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 31, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 19, 2026, 8:04 PM EDT for Bucks County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 25 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
- May 19, 2026, 8:04 PM EDT (00:04 UTC)
- Expired
- May 19, 2026, 8:29 PM EDT
- In force
- 25 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 43 km from the middle of the area, began a volume at 00:06 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
Brookhaven, NY (KOKX), launched 00:00Z, 0.1 hours before the alert went out and 186 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
- 146 J/kg
- Mixed-layer CIN
- -210 J/kg
- Mixed-layer LCL
- 1622 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted.
077
WUUS51 KPHI 200004
SVRPHI
PAC017-091-101-200045-
/O.NEW.KPHI.SV.W.0031.260520T0004Z-260520T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
804 PM EDT Tue May 19 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
East central Montgomery County in southeastern Pennsylvania...
Southeastern Bucks County in southeastern Pennsylvania...
Northeastern Philadelphia County in southeastern Pennsylvania...
* Until 845 PM EDT.
* At 804 PM EDT, a severe thunderstorm was located over Feasterville,
or 13 miles west of Trenton, moving east at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Philadelphia, Trenton, Bensalem, Burlington, Bristol, Hatboro,
Yardley, Newtown, Tullytown, Abington, Langhorne, Bryn Athyn,
Ivyland, Feasterville-Trevose, Feasterville, Woodside, Richboro,
Langhorn, Levittown, and Florence-Roebling.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
&&
LAT...LON 4014 7473 4012 7478 4013 7482 4010 7484
4008 7487 4007 7491 4012 7512 4030 7504
4023 7479 4016 7472
TIME...MOT...LOC 0004Z 286DEG 16KT 4018 7501
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS2 follow-up statements
459
WWUS51 KPHI 200019
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
819 PM EDT Tue May 19 2026
PAC091-101-200028-
/O.CAN.KPHI.SV.W.0031.000000T0000Z-260520T0045Z/
Montgomery PA-Philadelphia PA-
819 PM EDT Tue May 19 2026
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MONTGOMERY AND
NORTHEASTERN PHILADELPHIA COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.
LAT...LON 4014 7473 4012 7478 4013 7482 4010 7484
4008 7487 4010 7496 4012 7498 4027 7495
4023 7479 4017 7473
TIME...MOT...LOC 0018Z 277DEG 21KT 4018 7488
$$
PAC017-200045-
/O.CON.KPHI.SV.W.0031.000000T0000Z-260520T0045Z/
Bucks PA-
819 PM EDT Tue May 19 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR SOUTHEASTERN BUCKS COUNTY...
At 818 PM EDT, a severe thunderstorm was located over Langhorn, or
near Trenton, moving east at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Trenton, Bensalem, Burlington, Bristol, Yardley, Newtown, Tullytown,
Langhorne, Langhorn, Levittown, Woodside, Florence-Roebling,
Feasterville-Trevose, Morrisville, Penndel, Langhorne Manor,
Hulmeville, Fieldsboro, Woodbourne, and Croydon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
&&
LAT...LON 4014 7473 4012 7478 4013 7482 4010 7484
4008 7487 4010 7496 4012 7498 4027 7495
4023 7479 4017 7473
TIME...MOT...LOC 0018Z 277DEG 21KT 4018 7488
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS047
WWUS51 KPHI 200029
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
829 PM EDT Tue May 19 2026
PAC017-200039-
/O.CAN.KPHI.SV.W.0031.000000T0000Z-260520T0045Z/
Bucks PA-
829 PM EDT Tue May 19 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BUCKS COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4014 7473 4012 7478 4013 7482 4010 7484
4008 7487 4010 7496 4012 7498 4027 7495
4023 7479 4017 7473
TIME...MOT...LOC 0024Z 286DEG 16KT 4017 7482
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 3:57 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 48 min |
| May 20, 4:00 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 45 min |
| May 20, 4:29 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 46 min |
| May 20, 4:43 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Northampton | 47 min |
| May 20, 4:46 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 44 min |
| May 20, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 40 min |
| May 20, 5:10 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 50 min |
| May 20, 5:15 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Montgomery, Philadelphia | 45 min |
| May 20, 5:24 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 51 min |
| May 20, 5:29 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 46 min |
| May 20, 5:40 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 3 hr |
| May 20, 5:41 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 49 min |
| May 20, 5:52 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 38 min |
| May 20, 6:01 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 44 min |
| May 20, 6:09 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 46 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.