Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Mar 31, 2025, 6:38 PM EDT for Berks County, Montgomery County, Pennsylvania. It was in force for 14 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
- Mar 31, 2025, 6:38 PM EDT (22:38 UTC)
- Expired
- Mar 31, 2025, 6:52 PM EDT
- In force
- 14 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Berks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 116 km from the middle of the area, began a volume at 22:38 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 31, 7:01 PM EDT | TSTM WND DMG | 2 Nnw Exeter Twp, PA | Trees 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, 10.6 hours before the alert went out and 219 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
- 52 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 654 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 241 m²/s²
- 0-3 km storm-relative helicity
- 252 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted.
183
WUUS51 KPHI 312238
SVRPHI
PAC011-091-312330-
/O.NEW.KPHI.SV.W.0005.250331T2238Z-250331T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
638 PM EDT Mon Mar 31 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...
* Until 730 PM EDT.
* At 637 PM EDT, a severe thunderstorm was located near Birdsboro, or
7 miles east of Reading, moving northeast 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...
Boyertown, Lorane, Birdsboro, Reiffton, Red Hill, Geryville, Amity
Gardens, Bally, East Greenville, Green Lane, Pennsburg, St.
Lawrence, Gilbertsville, Bechtelsville, Halfway House, and Telford.
This includes Northeast Extension between mile markers 36 and 39.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4049 7560 4033 7533 4025 7583 4034 7588
TIME...MOT...LOC 2237Z 246DEG 23KT 4032 7579
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM2 follow-up statements
488
WWUS51 KPHI 312239
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
639 PM EDT Mon Mar 31 2025
PAC011-091-312330-
/O.CON.KPHI.SV.W.0005.000000T0000Z-250331T2330Z/
Berks PA-Montgomery PA-
639 PM EDT Mon Mar 31 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHEASTERN BERKS AND NORTHWESTERN MONTGOMERY COUNTIES...
At 639 PM EDT, a severe thunderstorm was located near Birdsboro, or 8
miles east of Reading, moving northeast at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Boyertown, Lorane, Birdsboro, Reiffton, Red Hill, Geryville, Amity
Gardens, Bally, East Greenville, Green Lane, Pennsburg, St. Lawrence,
Gilbertsville, Bechtelsville, Halfway House, and Telford.
This includes Northeast Extension between mile markers 36 and 39.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4049 7560 4033 7533 4025 7583 4034 7588
TIME...MOT...LOC 2239Z 246DEG 23KT 4032 7577
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM982 WWUS51 KPHI 312252 SVSPHI Severe Weather Statement National Weather Service Mount Holly NJ 652 PM EDT Mon Mar 31 2025 PAC011-091-312302- /O.CAN.KPHI.SV.W.0005.000000T0000Z-250331T2330Z/ Berks PA-Montgomery PA- 652 PM EDT Mon Mar 31 2025 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS AND NORTHWESTERN MONTGOMERY 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 are still possible with this thunderstorm. LAT...LON 4049 7560 4033 7533 4025 7583 4034 7588 TIME...MOT...LOC 2247Z 246DEG 23KT 4035 7567 $$ RCM
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 6:12 PM EDT | Tornado Warning | PHI | Berks | 11 min |
| Mar 31, 7:34 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 41 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; radar from the NEXRAD Level II archive.