Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 267, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2026, 7:08 PM EDT for Berks County, Chester County, Montgomery County, Pennsylvania. It was in force for 35 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
- Jul 28, 2026, 7:08 PM EDT (23:08 UTC)
- Expired
- Jul 28, 2026, 7:43 PM EDT
- In force
- 35 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Berks County, PA, Chester County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 115 km from the middle of the area, began a volume at 23:08 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 |
|---|---|---|---|
| Jul 28, 7:25 PM EDT | TSTM WND DMG | Phoenixville, PA | Tree down on Road at 150 Paradise Street. Time estimated from radar. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 28, 12:51 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 28, 4:20 PM EDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.1 hours before the alert went out and 197 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
- 710 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 968 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 174 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.2
The text
As transmitted.
140
WUUS51 KPHI 282308
SVRPHI
PAC011-029-091-290015-
/O.NEW.KPHI.SV.W.0267.260728T2308Z-260729T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
708 PM EDT Tue Jul 28 2026
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 815 PM EDT.
* At 708 PM EDT, a severe thunderstorm was located near Glenmoore, or
13 miles east of New Holland, moving northeast at 20 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, Souderton, Birdsboro,
Collegeville, Royersford, Trappe, Hatfield, East Greenville, Honey
Brook, Schwenksville, Elverson, Bally, Bechtelsville, Green Lane,
New Morgan, Pughtown, Spring Mount, and Glenmoore.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 310.
Northeast Extension between mile markers 27 and 38.
Interstate 176 in Pennsylvania between mile markers 1 and 2.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM EDT for southeastern
Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
A Tornado Watch remains in effect until 1000 PM EDT for southeastern
Pennsylvania.
&&
LAT...LON 4014 7588 4017 7593 4045 7554 4025 7521
4011 7554 4003 7594 4011 7594
TIME...MOT...LOC 2308Z 244DEG 17KT 4010 7583
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL1 follow-up statement
846
WWUS51 KPHI 282343
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
743 PM EDT Tue Jul 28 2026
PAC011-029-091-282353-
/O.CAN.KPHI.SV.W.0267.000000T0000Z-260729T0015Z/
Berks PA-Montgomery PA-Chester PA-
743 PM EDT Tue Jul 28 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS...
NORTHWESTERN MONTGOMERY AND NORTHEASTERN CHESTER COUNTIES IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However heavy rain is
still possible with this thunderstorm.
A Tornado Watch remains in effect until 1000 PM EDT for southeastern
Pennsylvania.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
eastern Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4014 7588 4017 7593 4045 7554 4025 7521
4011 7554 4003 7594 4011 7594
TIME...MOT...LOC 2341Z 244DEG 17KT 4017 7563
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 8:01 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 23 min |
| Jul 28, 1:02 PM EDT | Flash Flood Warning | PHI | Lehigh, Monroe, Northampton | 4 hr |
| Jul 28, 1:22 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 38 min |
| Jul 28, 1:31 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 44 min |
| Jul 28, 1:49 PM EDT | Tornado Warning | PHI | Monroe, Northampton | 26 min |
| Jul 28, 2:15 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 45 min |
| Jul 28, 5:08 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 15 min |
| Jul 28, 5:22 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 34 min |
| Jul 28, 5:29 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 61 min |
| Jul 28, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 43 min |
| Jul 28, 5:55 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Jul 28, 6:16 PM EDT | Tornado Warning | PHI | Chester | 29 min |
| Jul 28, 6:17 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Northampton | 6 hr |
| Jul 28, 6:23 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 67 min |
| Jul 28, 6:46 PM EDT | Tornado Warning | PHI | Delaware | 29 min |
| Jul 28, 6:56 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Northampton | 5 hr |
| Jul 28, 7:06 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 54 min |
| Jul 28, 7:11 PM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 3 hr |
| Jul 28, 7:24 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 28, 7:31 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 44 min |
| Jul 28, 7:55 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 4 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.