Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 57, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 6, 2026, 6:17 PM EDT for New Castle County, Delaware; Hunterdon County, Mercer County, Somerset County, New Jersey; 7 counties in Pennsylvania. It was in force for 58 min. 15 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 6, 2026, 6:17 PM EDT (22:17 UTC)
- Expired
- Jun 6, 2026, 7:15 PM EDT
- In force
- 58 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Hunterdon County, NJ, Mercer County, NJ, Somerset County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 101 km from the middle of the area, began a volume at 22:17 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 6, 6:27 PM EDT | TSTM WND DMG | 2 Nnw Birdsboro, PA | Tree into a house with lives wires. Time given in report. |
| Jun 6, 6:28 PM EDT | TSTM WND DMG | 2 Sw Douglassville, PA | Tree down blocking 1 lane. Time estimated from radar. |
| Jun 6, 6:35 PM EDT | TSTM WND DMG | South Pottstown, PA | Some trees blown down. Time estimated from radar. |
| Jun 6, 6:40 PM EDT | TSTM WND DMG | 1 Ne Lower Pottsgrove T, PA | Tree blown into wires. Time estimated from radar. |
| Jun 6, 6:41 PM EDT | TSTM WND GST 49 | 1 W Valley Twp, PA | AWOS station KMQS Coatesville. |
| Jun 6, 6:48 PM EDT | TSTM WND DMG | 1 Nnw East Fallowfield, PA | Wires blown down. Time estimated from radar. |
| Jun 6, 6:50 PM EDT | TSTM WND DMG | 1 Wnw Sanatoga, PA | Tree blown down...blocking a road. Time estimated from radar. |
| Jun 6, 6:50 PM EDT | TSTM WND DMG | East Whiteland Twp, PA | Multiple reports of wires down in East Whiteland Township. Time estimated from radar. |
| Jun 6, 6:54 PM EDT | TSTM WND DMG | Chester Springs, PA | Tree down onto wires with wires sparking. Via fire scanner. |
| Jun 6, 6:58 PM EDT | TSTM WND DMG | 1 Nnw West Chester, PA | Some trees down reported near the Chester County Hospital. |
| Jun 6, 7:00 PM EDT | TSTM WND DMG | Buckingham Twp, PA | Multiple reports of trees down in multiple locations in Bucks County, including Buckingham Township. Time estimated from radar. |
| Jun 6, 7:15 PM EDT | TSTM WND DMG | 1 E Ewing, NJ | Large limbed broken from one tree, another snapped at the roots, in close proximity to each other on the College of New Jersey campus. Time estimated from radar. |
| Jun 6, 7:16 PM EDT | TSTM WND GST 45 | Trenton Mercer Airport, NJ | ASOS station KTTN Trenton. |
| Jun 6, 7:20 PM EDT | TSTM WND DMG | 1 Wsw Summerdale, PA | Multiple reports of downed trees in Philadelphia. Time estimated from radar. |
| Jun 6, 7:25 PM EDT | TSTM WND GST 47 | Northeast Philadelphia, PA | ASOS station KPNE Philadelphia Northeast. |
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 6, 4:45 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.3 hours before the alert went out and 195 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1674 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
665
WUUS51 KPHI 062217
SVRPHI
DEC003-NJC019-021-035-PAC011-017-029-045-077-091-101-062315-
/O.NEW.KPHI.SV.W.0057.260606T2217Z-260606T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
617 PM EDT Sat Jun 6 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northern New Castle County in northern Delaware...
Southeastern Hunterdon County in northwestern New Jersey...
Northwestern Mercer County in central New Jersey...
Southwestern Somerset County in northern New Jersey...
Southeastern Berks County in eastern Pennsylvania...
Montgomery County in southeastern Pennsylvania...
Southeastern Lehigh County in eastern Pennsylvania...
Bucks County in southeastern Pennsylvania...
Chester County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
Delaware County in southeastern Pennsylvania...
* Until 715 PM EDT.
* At 617 PM EDT, severe thunderstorms were located along a line
extending from near Zionsville to near Stewartstown, moving east at
60 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...
Philadelphia, Trenton, Camden, Wilmington, West Chester, Ewing,
Norristown, Chester, Pottstown, Phoenixville, Lansdale, West
Norriton, East Norriton, Coatesville, Princeton, Yeadon, Emmaus,
Westtown, Quakertown, and Perkasie.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3976 7606 3987 7599 3995 7600 4004 7593
4011 7594 4014 7588 4021 7598 4054 7555
4048 7449 4011 7497 4005 7498 3996 7513
3988 7515 3984 7536 3974 7548 3972 7613
TIME...MOT...LOC 2217Z 267DEG 51KT 4049 7557 3976 7650
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL2 follow-up statements
577
WWUS51 KPHI 062255
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
655 PM EDT Sat Jun 6 2026
DEC003-NJC019-021-035-PAC011-017-029-045-077-091-101-062315-
/O.CON.KPHI.SV.W.0057.000000T0000Z-260606T2315Z/
New Castle DE-Hunterdon NJ-Mercer NJ-Somerset NJ-Berks PA-
Montgomery PA-Lehigh PA-Bucks PA-Chester PA-Philadelphia PA-
Delaware PA-
655 PM EDT Sat Jun 6 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHERN NEW CASTLE...SOUTHEASTERN HUNTERDON...NORTHWESTERN
MERCER...SOUTHWESTERN SOMERSET...SOUTHEASTERN BERKS...MONTGOMERY...
SOUTHEASTERN LEHIGH...BUCKS...CHESTER...PHILADELPHIA AND DELAWARE
COUNTIES...
At 653 PM EDT, severe thunderstorms were located along a line
extending from near Sand Brook to near West Grove, moving east at 60
mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Philadelphia, Trenton, Camden, Wilmington, West Chester, Ewing,
Norristown, Chester, Pottstown, Phoenixville, Lansdale, West
Norriton, East Norriton, Coatesville, Princeton, Yeadon, Westtown,
Quakertown, Perkasie, and Doylestown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Wind damage with these storms may occur before any rain or
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.
&&
LAT...LON 3976 7606 3987 7599 3995 7600 4004 7593
4011 7594 4014 7588 4036 7565 4054 7547
4048 7449 4011 7497 4005 7498 3996 7513
3988 7515 3984 7536 3974 7548 3972 7613
TIME...MOT...LOC 2253Z 270DEG 51KT 4051 7492 3978 7586
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL454
WWUS51 KPHI 062322
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
722 PM EDT Sat Jun 6 2026
DEC003-NJC019-021-035-PAC011-017-029-045-077-091-101-062332-
/O.EXP.KPHI.SV.W.0057.000000T0000Z-260606T2315Z/
New Castle DE-Hunterdon NJ-Mercer NJ-Somerset NJ-Berks PA-
Montgomery PA-Lehigh PA-Bucks PA-Chester PA-Philadelphia PA-
Delaware PA-
722 PM EDT Sat Jun 6 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN NEW CASTLE...
SOUTHEASTERN HUNTERDON...NORTHWESTERN MERCER...SOUTHWESTERN
SOMERSET...SOUTHEASTERN BERKS...MONTGOMERY...SOUTHEASTERN LEHIGH...
BUCKS...CHESTER...PHILADELPHIA AND DELAWARE COUNTIES HAS EXPIRED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern Delaware...southern, central, northern and northwestern New
Jersey...and eastern and southeastern Pennsylvania.
LAT...LON 3976 7606 3987 7599 3995 7600 4004 7593
4011 7594 4014 7588 4036 7565 4054 7547
4048 7449 4011 7497 4005 7498 3996 7513
3988 7515 3984 7536 3974 7548 3972 7613
TIME...MOT...LOC 2322Z 270DEG 51KT 4053 7443 3980 7537
$$
CooperThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 67 min |
| Jun 6, 6:13 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren | 47 min |
| Jun 6, 6:59 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Monmouth, Morris, Somerset, Sussex and 1 more | 61 min |
| Jun 6, 7:03 PM EDT | Special Marine Warning | PHI | 57 min | |
| Jun 6, 7:05 PM EDT | Special Marine Warning | PHI | 115 min | |
| Jun 6, 7:19 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Hunterdon, Mercer, Middlesex, Monmouth and 2 more | 41 min |
| Jun 6, 7:36 PM EDT | Special Marine Warning | PHI | 54 min | |
| Jun 6, 7:55 PM EDT | Special Marine Warning | PHI | 35 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2026Severe Thunderstorm Warnings in New Jersey, 2026Severe Thunderstorm Warnings in Delaware, 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.