Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 88, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 25, 2025, 6:41 PM EDT for Berks County, Chester County, Montgomery County, Pennsylvania. It was in force for 32 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 25, 2025, 6:41 PM EDT (22:41 UTC)
- Expired
- Jun 25, 2025, 7:13 PM EDT
- In force
- 32 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Berks County, PA, Chester County, PA, Montgomery County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 25, 7:00 PM EDT | TSTM WND DMG | Lower Providence Townsh, PA | Tree down. Time estimated from radar. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.7 hours before the alert went out and 211 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
- 515 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 1717 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- -27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
872
WUUS51 KPHI 252241
SVRPHI
PAC011-029-091-252330-
/O.NEW.KPHI.SV.W.0088.250625T2241Z-250625T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
641 PM EDT Wed Jun 25 2025
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Berks County in eastern Pennsylvania...
Northwestern Montgomery County in southeastern Pennsylvania...
Northeastern Chester County in southeastern Pennsylvania...
* Until 730 PM EDT.
* At 641 PM EDT, a severe thunderstorm was located over
Gilbertsville, or 13 miles east of Reading, moving southeast at 25
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Pottstown, Phoenixville, Lansdale, West Norriton, East Norriton,
Collegeville, Royersford, Trappe, Schwenksville, Bechtelsville,
Pughtown, Spring Mount, Valley Forge, Chester Springs,
Gilbertsville, Cedarville, Skippack, Stowe, Boyertown, and Spring
City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
&&
LAT...LON 4031 7581 4042 7566 4021 7524 4002 7556
TIME...MOT...LOC 2241Z 313DEG 22KT 4033 7566
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann2 follow-up statements
064
WWUS51 KPHI 252301
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
701 PM EDT Wed Jun 25 2025
PAC011-252311-
/O.CAN.KPHI.SV.W.0088.000000T0000Z-250625T2330Z/
Berks PA-
701 PM EDT Wed Jun 25 2025
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4025 7569 4038 7558 4021 7524 4002 7556
4022 7573
TIME...MOT...LOC 2301Z 313DEG 22KT 4024 7556
$$
PAC029-091-252330-
/O.CON.KPHI.SV.W.0088.000000T0000Z-250625T2330Z/
Montgomery PA-Chester PA-
701 PM EDT Wed Jun 25 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR NORTHWESTERN MONTGOMERY AND NORTHEASTERN CHESTER COUNTIES...
At 701 PM EDT, a severe thunderstorm was located near Royersford, or
19 miles north of West Chester, moving southeast at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Pottstown, Phoenixville, Lansdale, West Norriton, East Norriton,
Collegeville, Royersford, Trappe, Schwenksville, Pughtown, Spring
Mount, Valley Forge, Chester Springs, Gilbertsville, Cedarville,
Skippack, Stowe, Spring City, North Wales, and Harleysville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4025 7569 4038 7558 4021 7524 4002 7556
4022 7573
TIME...MOT...LOC 2301Z 313DEG 22KT 4024 7556
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann076
WWUS51 KPHI 252313
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
713 PM EDT Wed Jun 25 2025
PAC029-091-252323-
/O.CAN.KPHI.SV.W.0088.000000T0000Z-250625T2330Z/
Montgomery PA-Chester PA-
713 PM EDT Wed Jun 25 2025
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MONTGOMERY AND
NORTHEASTERN CHESTER COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4025 7569 4038 7558 4021 7524 4002 7556
4022 7573
TIME...MOT...LOC 2308Z 313DEG 22KT 4019 7549
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 5:39 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 66 min |
| Jun 25, 7:54 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 26 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2025Every severe thunderstorm warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.