Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 90, NWS Philadelphia/Mount Holly

June 22, 20264 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 22, 2026, 4:15 PM EDT for 4 counties in Pennsylvania. It was in force for 45 min. 2 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: Jun 22, 2026, 4:15 PM EDT (20:15 UTC)
Expired: Jun 22, 2026, 5:00 PM EDT
In force: 45 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, Delaware County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 117 km from the middle of the area, began a volume at 20:16 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
Jun 22, 4:52 PM EDT	HAIL 1	1 N Upper Uwchlan Twp, PA	Report from mPING: Quarter (1.00 in.).
Jun 22, 5:00 PM EDT	TSTM WND DMG	1 Wnw Devault, PA	Trees and wires down reported around Charlestown Township. Time estimated by 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
Jun 22, 2:08 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.3 hours before the alert went out and 192 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1417 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 172 m²/s²
0-3 km storm-relative helicity: 286 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

200 
WUUS51 KPHI 222015
SVRPHI
PAC011-029-045-091-222100-
/O.NEW.KPHI.SV.W.0090.260622T2015Z-260622T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
415 PM EDT Mon Jun 22 2026

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...
  Central Delaware County in southeastern Pennsylvania...

* Until 500 PM EDT.

* At 415 PM EDT, a severe thunderstorm was located over Honey Brook,
  or 7 miles east of New Holland, moving east at 35 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...
  West Chester, Pottstown, Phoenixville, Coatesville, Downingtown,
  Collegeville, Royersford, Trappe, Honey Brook, Elverson, New
  Morgan, Pughtown, Lionville-Marchwood, Valley Forge, Glenmoore,
  Paoli, Chester Springs, Lionville, Cedarville, and West Goshen.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 296 and 324.
 Interstate 176 in Pennsylvania between mile markers 1 and 5.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 4030 7549 3997 7542 3997 7598 4004 7593
      4011 7594 4014 7588 4021 7599
TIME...MOT...LOC 2015Z 262DEG 31KT 4010 7595 

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

$$

Cooper

1 follow-up statement

466 
WWUS51 KPHI 222045
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
445 PM EDT Mon Jun 22 2026

PAC011-029-045-091-222100-
/O.CON.KPHI.SV.W.0090.000000T0000Z-260622T2100Z/
Berks PA-Montgomery PA-Chester PA-Delaware PA-
445 PM EDT Mon Jun 22 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR SOUTH CENTRAL BERKS...WEST CENTRAL MONTGOMERY...NORTHERN CHESTER
AND CENTRAL DELAWARE COUNTIES...

At 445 PM EDT, a severe thunderstorm was located over Chester 
Springs, or 12 miles north of West Chester, moving east at 35 mph. A 
tornado warning is also in effect for portions of the area.

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...
West Chester, Pottstown, Phoenixville, Coatesville, Downingtown,
Collegeville, Royersford, Trappe, Elverson, New Morgan, Pughtown,
Lionville-Marchwood, Valley Forge, Glenmoore, Paoli, Chester Springs,
Lionville, Cedarville, West Goshen, and Stowe.

This includes Pennsylvania Turnpike between mile markers 300 and 324.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 3997 7542 3997 7598 4003 7592 4013 7587
      4021 7587 4027 7548
TIME...MOT...LOC 2045Z 262DEG 31KT 4014 7561 

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

$$

Cooper

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 2:13 AM EDT	Flood Watch	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	25 hr
Jun 22, 2:20 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	40 min
Jun 22, 2:55 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	50 min
Jun 22, 4:35 PM EDT	Tornado Warning	PHI	Berks, Chester, Delaware, Montgomery	25 min
Jun 22, 4:56 PM EDT	Tornado Warning	PHI	Chester, Delaware, Montgomery	34 min
Jun 22, 5:18 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	42 min
Jun 22, 5:22 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	53 min
Jun 22, 5:53 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	52 min
Jun 22, 6:02 PM EDT	Flash Flood Warning	PHI	Delaware, Montgomery, Philadelphia	4 hr
Jun 22, 6:02 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	43 min
Jun 22, 6:09 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	51 min
Jun 22, 6:26 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery, Philadelphia	4 hr
Jun 22, 6:36 PM EDT	Flash Flood Warning	PHI	Philadelphia	3 hr
Jun 22, 6:48 PM EDT	Flash Flood Warning	PHI	Bucks	3 hr

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.