Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 150, NWS Philadelphia/Mount Holly

July 8, 2025Berks County, Chester County, Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 8, 2025, 4:33 PM EDT for Berks County, Chester County, Montgomery County, Pennsylvania. It was in force for 42 min. 16 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 8, 2025, 4:33 PM EDT (20:33 UTC)
Expired: Jul 8, 2025, 5:15 PM EDT
In force: 42 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

The radar

The Philadelphia radar (KDIX), 119 km from the middle of the area, began a volume at 20:36 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 8, 4:38 PM EDT	TSTM WND DMG	Douglassville, PA	Tree down on a residence. Time estimated from radar.
Jul 8, 4:45 PM EDT	TSTM WND DMG	Honey Brook Twp, PA	Wires and poles down. Time est.
Jul 8, 4:55 PM EDT	HAIL 0.5	Birdsboro, PA	Report from mPING: Half-inch (0.50 in.).
Jul 8, 4:58 PM EDT	HAIL 0.75	Stowe, PA	Report from mPING: Dime (0.75 in.).
Jul 8, 4:59 PM EDT	HAIL 1	Union Twp, PA	Relayed via social media. Time included with report.
Jul 8, 5:01 PM EDT	TSTM WND DMG	2 Ne Upper Uwchlan Twp, PA	Report and photos showing a large tree snapped and a shed completed destroyed by wind at a residence on Carriage Lane in West Vincent Twp. Time estimated from radar.
Jul 8, 5:02 PM EDT	TSTM WND GST 68	Pottstown, PA	Measured 68 mph gust in Pottstown. Time included in report.
Jul 8, 5:02 PM EDT	HAIL 1	Pottstown, PA	Quarter-size hail in Pottstown. Video sent via social media. Time included with report.
Jul 8, 5:03 PM EDT	TSTM WND DMG	Uwchlan Twp, PA	Trees and wires down. Time estimated from radar.
Jul 8, 5:05 PM EDT	TSTM WND DMG	1 Wnw Upper Uwchlan Twp, PA	Pictures of widespread tree damage in Upper Uwchlan Township sent in by an EM. Time estimated from radar.
Jul 8, 5:05 PM EDT	TSTM WND DMG	Chester Springs, PA	Numerous trees down. Time estimated from radar.
Jul 8, 5:05 PM EDT	TSTM WND DMG	Glenmoore, PA	Images shared on social media show several trees downed and one building under construction damaged near the intersection of Fairview Rd and McKnight Farm Ln.
Jul 8, 5:10 PM EDT	TSTM WND DMG	Kimberton, PA	Trees and wires down. Time estimated from radar.
Jul 8, 5:10 PM EDT	TSTM WND DMG	Pottstown, PA	Damage to house shutters, trees down in Pottstown. Time estimated from radar.
Jul 8, 5:15 PM EDT	TSTM WND DMG	Pottstown, PA	Several trees and wires down around Pottstown and Pottsgrove. Time estimated from radar.
Jul 8, 5:24 PM EDT	HAIL 0.5	2 Se Upper Uwchlan Twp, PA	Report from mPING: Half-inch (0.50 in.).

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 8, 1:42 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.6 hours before the alert went out and 190 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: 695 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1207 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

589 
WUUS51 KPHI 082033
SVRPHI
PAC011-029-091-082115-
/O.NEW.KPHI.SV.W.0150.250708T2033Z-250708T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
433 PM EDT Tue Jul 8 2025

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southeastern Berks County in eastern Pennsylvania...
  West central Montgomery County in southeastern Pennsylvania...
  Northern Chester County in southeastern Pennsylvania...

* Until 515 PM EDT.

* At 433 PM EDT, severe thunderstorms were located along a line
  extending from near Adamstown to Terre Hill to near Paradise,
  moving east at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  West Chester, Pottstown, Phoenixville, Coatesville, Downingtown,
  Birdsboro, Royersford, Parkesburg, Honey Brook, Elverson, New
  Morgan, Pughtown, Marshallton, Lionville-Marchwood, Glenmoore,
  Chester Springs, Lionville, Cedarville, Gilbertsville, and West
  Goshen.

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 these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

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

&&

LAT...LON 4032 7560 4010 7551 3991 7562 3998 7598
      4004 7593 4011 7594 4014 7588 4026 7606
TIME...MOT...LOC 2033Z 278DEG 43KT 4028 7608 4017 7605 4004 7609 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MJL

2 follow-up statements

173 
WWUS51 KPHI 082049
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
449 PM EDT Tue Jul 8 2025

PAC011-029-091-082115-
/O.CON.KPHI.SV.W.0150.000000T0000Z-250708T2115Z/
Berks PA-Montgomery PA-Chester PA-
449 PM EDT Tue Jul 8 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHEASTERN BERKS...WEST CENTRAL MONTGOMERY AND NORTHERN CHESTER
COUNTIES...

At 449 PM EDT, severe thunderstorms were located along a line
extending from near Birdsboro to Elverson to near Coatesville, moving
east at 50 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
West Chester, Pottstown, Phoenixville, Coatesville, Downingtown,
Birdsboro, Royersford, Parkesburg, Honey Brook, Elverson, New Morgan,
Pughtown, Marshallton, Lionville-Marchwood, Glenmoore, Chester
Springs, Lionville, Cedarville, Gilbertsville, and West Goshen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4032 7560 4010 7551 3991 7562 3998 7598
      4004 7593 4011 7594 4014 7588 4026 7606
TIME...MOT...LOC 2049Z 278DEG 43KT 4026 7588 4015 7585 4002 7589 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MJL

581 
WWUS51 KPHI 082110
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
510 PM EDT Tue Jul 8 2025

PAC011-029-091-082118-
/O.EXP.KPHI.SV.W.0150.000000T0000Z-250708T2115Z/
Berks PA-Montgomery PA-Chester PA-
510 PM EDT Tue Jul 8 2025

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS...WEST
CENTRAL MONTGOMERY AND NORTHERN CHESTER COUNTIES WILL EXPIRE AT 515
PM EDT...

The Severe Thunderstorm Warning will be allowed to expire. However 
gusty winds and heavy rain are still possible with these 
thunderstorms.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
eastern and southeastern Pennsylvania.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

Remember, a Severe Thunderstorm Warning still remains in effect for 
Eastern Berks, Western Montgomery, and Northern Chester Counties 
until 545 PM EDT.

LAT...LON 4032 7560 4010 7551 3991 7562 3998 7598
      4004 7593 4011 7594 4014 7588 4026 7606
TIME...MOT...LOC 2108Z 278DEG 43KT 4023 7562 4012 7559 3999 7564 

$$

MJL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 10:59 PM EDT	Flood Watch	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more	23 hr
Jul 8, 3:04 PM EDT	Severe Thunderstorm Warning	PHI	Berks	41 min
Jul 8, 3:44 PM EDT	Severe Thunderstorm Warning	PHI	Berks	46 min
Jul 8, 4:05 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Jul 8, 4:20 PM EDT	Severe Thunderstorm Warning	PHI	Chester	40 min
Jul 8, 4:25 PM EDT	Severe Thunderstorm Warning	PHI	Berks	35 min
Jul 8, 4:39 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 8, 4:54 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Berks, Chester, Montgomery	51 min
Jul 8, 4:56 PM EDT	Severe Thunderstorm Warning	PHI	Chester	19 min
Jul 8, 5:02 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 8, 5:16 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	29 min
Jul 8, 5:19 PM EDT	Tornado Warning	PHI	Bucks, Montgomery	26 min
Jul 8, 5:20 PM EDT	Tornado Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	25 min
Jul 8, 5:31 PM EDT	Flash Flood Warning	PHI	Chester, Delaware	4 hr
Jul 8, 5:34 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Bucks, Delaware, Montgomery, Philadelphia	41 min
Jul 8, 5:45 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	4 hr
Jul 8, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	44 min
Jul 8, 5:52 PM EDT	Tornado Warning	PHI	Bucks, Montgomery, Philadelphia	13 min
Jul 8, 5:53 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery, Philadelphia	4 hr
Jul 8, 5:56 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Bucks, Philadelphia	49 min
Jul 8, 6:08 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	34 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2025 Every 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.