Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 133, NWS Philadelphia/Mount Holly

July 4, 2026Berks County, Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 4, 2026, 7:44 PM EDT for Berks County, Chester County, Pennsylvania. It was in force for 61 min. 14 reports 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 4, 2026, 7:44 PM EDT (23:44 UTC)
Expired: Jul 4, 2026, 8:45 PM EDT
In force: 61 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

The radar

The Philadelphia radar (KDIX), 124 km from the middle of the area, began a volume at 23:45 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 4, 8:02 PM EDT	TSTM WND DMG	Shillington, PA	Trees down along Goldfinch Drive in Wyomissing, likely from outflow boundary producing 60 MPH gusts. Time estimated from radar.
Jul 4, 8:05 PM EDT	TSTM WND DMG	1 E Mohnton, PA	Trees down on wires around Cumru Township. Time estimated from radar.
Jul 4, 8:05 PM EDT	TSTM WND DMG	Mohnton, PA	Wires down along Madison Street in Mohnton. Time estimated from radar.
Jul 4, 8:12 PM EDT	TSTM WND DMG	1 Nw Robeson Twp, PA	Wires down around Zion Road and Golf Course Road, resulting in an ongoing fire. Time estimated from radar.
Jul 4, 8:12 PM EDT	TSTM WND DMG	Mount Penn, PA	Wires down in Mount Penn Borough. Time estimated from radar.
Jul 4, 8:14 PM EDT	TSTM WND DMG	1 Wsw Lorane, PA	Tree down into a house resulting in damage to the residence. No injuries reported. Time estimated from radar.
Jul 4, 8:15 PM EDT	TSTM WND DMG	Coatesville, PA	Trained Spotter reports several trees and wires down around Coatesville. Time estimated from radar.
Jul 4, 8:15 PM EDT	TSTM WND GST 58	1 Se Valley Twp, PA	Westwood Mesonet gusted to 58 MPH.
Jul 4, 8:15 PM EDT	TSTM WND GST 58	1 Wsw Valley Twp, PA
Jul 4, 8:17 PM EDT	TSTM WND DMG	Honey Brook, PA	Social media photo showed snapped tree branches. Time estimated by radar.
Jul 4, 8:20 PM EDT	TSTM WND GST 59	2 E Londonderry Twp, PA	West Grove DEOS Mesonet.
Jul 4, 8:25 PM EDT	TSTM WND DMG	1 Nw Oley, PA	Trees down around Houck Road. Time estimated from radar.
Jul 4, 8:27 PM EDT	TSTM WND GST 62	1 Nne East Caln Twp, PA	Measured from anemometer. Reported from spotter network.
Jul 4, 8:28 PM EDT	TSTM WND DMG	2 Ssw Earl Twp, PA	Trees and wires down along Powerline Road. 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 4, 3:28 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.7 hours before the alert went out and 187 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 721 J/kg
Mixed-layer CIN: -310 J/kg
Mixed-layer LCL: 1583 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

745 
WUUS51 KPHI 042344
SVRPHI
PAC011-029-050045-
/O.NEW.KPHI.SV.W.0133.260704T2344Z-260705T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
744 PM EDT Sat Jul 4 2026

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southern Berks County in eastern Pennsylvania...
  Chester County in southeastern Pennsylvania...

* Until 845 PM EDT.

* At 744 PM EDT, a severe thunderstorm was located over Leacock, or
  near Lancaster, moving east at 30 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...
  Reading, West Chester, Pottstown, Coatesville, Wyomissing,
  Downingtown, Kennett Square, Birdsboro, Sinking Spring, Laureldale,
  Parkesburg, West Grove, Womelsdorf, Wernersville, Robesonia, Honey
  Brook, Elverson, New Morgan, Pughtown, and Marshallton.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 296 and 314.
 Interstate 176 in Pennsylvania between mile markers 1 and 11.

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4047 7565 4031 7564 4024 7569 4024 7563
      3984 7560 3981 7603 3987 7601 3987 7599
      3997 7599 4004 7593 4011 7594 4014 7588
      4038 7625
TIME...MOT...LOC 2344Z 265DEG 28KT 4009 7624 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MPS

2 follow-up statements

209 
WWUS51 KPHI 050007
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
807 PM EDT Sat Jul 4 2026

PAC011-029-050045-
/O.CON.KPHI.SV.W.0133.000000T0000Z-260705T0045Z/
Berks PA-Chester PA-
807 PM EDT Sat Jul 4 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR SOUTHERN BERKS AND CHESTER COUNTIES...

At 805 PM EDT, a severe thunderstorm was located over Elverson, or 13
miles south of Reading, moving east at 40 mph.

HAZARD...60 mph wind gusts and penny size hail. This storm has a 
         history of producing wind damage.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Reading, West Chester, Pottstown, Coatesville, Wyomissing,
Downingtown, Kennett Square, Birdsboro, Sinking Spring, Laureldale,
Parkesburg, West Grove, Womelsdorf, Wernersville, Robesonia, Honey
Brook, Elverson, New Morgan, Pughtown, and Marshallton.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 296 and 314.
 Interstate 176 in Pennsylvania between mile markers 1 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4047 7565 4031 7564 4024 7569 4024 7563
      3984 7560 3981 7603 3987 7601 3987 7599
      3997 7599 4004 7593 4011 7594 4014 7588
      4038 7625
TIME...MOT...LOC 0005Z 263DEG 34KT 4016 7585 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Gorse

250 
WWUS51 KPHI 050042
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
842 PM EDT Sat Jul 4 2026

PAC011-029-050051-
/O.EXP.KPHI.SV.W.0133.000000T0000Z-260705T0045Z/
Berks PA-Chester PA-
842 PM EDT Sat Jul 4 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BERKS AND CHESTER
COUNTIES WILL EXPIRE AT 845 PM EDT...

The storm which prompted the warning continues to move out of the 
area. Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
eastern and southeastern Pennsylvania.

Remember, another Severe Thunderstorm Warning still remains in 
effect for eastern Chester county on eastward.

LAT...LON 4047 7565 4031 7564 4024 7569 4024 7563
      3984 7560 3981 7603 3987 7601 3987 7599
      3997 7599 4004 7593 4011 7594 4014 7588
      4038 7625
TIME...MOT...LOC 0041Z 265DEG 28KT 4018 7550 

$$

Gorse

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 3, 8:15 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	45 min
Jul 3, 8:21 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	54 min
Jul 4, 6:04 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	41 min
Jul 4, 6:37 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	68 min
Jul 4, 7:09 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	41 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2026 Every 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.