Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 81, NWS Philadelphia/Mount Holly

June 14, 2026Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 14, 2026, 9:06 PM EDT for Chester County, Pennsylvania. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 14, 2026, 9:06 PM EDT (01:06 UTC)
Expired: Jun 14, 2026, 10:00 PM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

County Chester County, PA

The radar

The Dover AFB radar (KDOX), 118 km from the middle of the area, began a volume at 01:09 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.

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 14, 7:06 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.1 hours before the alert went out and 160 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: 916 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1620 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 6.4

Open this sounding in Storm Lab

The text

As transmitted.

892 
WUUS51 KPHI 150106
SVRPHI
PAC029-150200-
/O.NEW.KPHI.SV.W.0081.260615T0106Z-260615T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
906 PM EDT Sun Jun 14 2026

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern Chester County in southeastern Pennsylvania...

* Until 1000 PM EDT.

* At 906 PM EDT, a severe thunderstorm was located near Holtwood, or
  10 miles south of Willow Street, moving east at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  West Chester, Kennett Square, Oxford, West Grove, Glen Roy,
  Homeville, Cochranville, Landenberg, Mount Vernon, Kemblesville,
  North Star, Hockessin, Avondale, and Toughkenamon.

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.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 3976 7606 3981 7603 3983 7604 3983 7602
      3985 7602 3987 7599 3993 7599 3995 7557
      3984 7560 3981 7570 3972 7577 3972 7613
TIME...MOT...LOC 0106Z 269DEG 29KT 3983 7624 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hoeflich

1 follow-up statement

304 
WWUS51 KPHI 150139
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
939 PM EDT Sun Jun 14 2026

PAC029-150200-
/O.CON.KPHI.SV.W.0081.000000T0000Z-260615T0200Z/
Chester PA-
939 PM EDT Sun Jun 14 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR SOUTHWESTERN CHESTER COUNTY...

At 939 PM EDT, a severe thunderstorm was located over Cochranville,
or 14 miles northwest of Newark, moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
West Chester, Kennett Square, Oxford, West Grove, Glen Roy,
Homeville, Cochranville, Landenberg, Mount Vernon, Kemblesville,
North Star, Hockessin, Avondale, and Toughkenamon.

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 3976 7606 3981 7603 3983 7604 3983 7602
      3985 7602 3987 7599 3993 7599 3995 7557
      3984 7560 3981 7570 3972 7577 3972 7613
TIME...MOT...LOC 0139Z 261DEG 35KT 3986 7588 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Guzzo

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 8:16 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	44 min
Jun 14, 9:50 PM EDT	Flash Flood Warning	PHI	Chester	3 hr
Jun 14, 9:54 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	51 min
Jun 14, 10:15 PM EDT	Flash Flood Warning	PHI	Chester, Delaware	3 hr
Jun 14, 10:21 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	39 min
Jun 14, 10:26 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	3 hr
Jun 14, 10:38 PM EDT	Flash Flood Warning	PHI	Delaware	3 hr
Jun 14, 10:44 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	46 min
Jun 14, 10:51 PM EDT	Flash Flood Warning	PHI	Bucks, Philadelphia	3 hr
Jun 14, 10:58 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	47 min
Jun 14, 11:16 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	29 min
Jun 15, 1:37 AM EDT	Areal Flood Warning	PHI	Delaware	4 hr
Jun 15, 2:12 AM EDT	River Flood Warning	PHI	Delaware	2 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.