Alert archive / New Jersey / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 352, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 1, 2026, 8:17 PM EDT for Chester County, Delaware County, Pennsylvania; New Castle County, Delaware; Cumberland County, Gloucester County, Salem County, New Jersey. It was in force for 58 min. 23 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
- Sep 1, 2026, 8:17 PM EDT (00:17 UTC)
- Expired
- Sep 1, 2026, 9:15 PM EDT
- In force
- 58 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA
The radar
The Dover AFB radar (KDOX), 103 km from the middle of the area, began a volume at 00:21 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 |
|---|---|---|---|
| Sep 1, 8:18 PM EDT | TSTM WND DMG | Hockessin, DE | EM relays report of multiple roads close due to trees down. Time estimated. |
| Sep 1, 8:21 PM EDT | TSTM WND GST 60 | Hyde Park, DE | Spotter Network. Trained spotter reports 60 mph winds. |
| Sep 1, 8:26 PM EDT | TSTM WND DMG | 1 N Wilmington, DE | Downed trees reported in the area of Delaware Ave and I95. Time estimated. |
| Sep 1, 8:26 PM EDT | TSTM WND DMG | Talleyville, DE | Trees down in Talleyville. Time estimated from radar. |
| Sep 1, 8:26 PM EDT | TSTM WND DMG | Woodcrest, DE | A tree snapped halfway up the trunk. Time estimated from radar. |
| Sep 1, 8:26 PM EDT | TSTM WND DMG | Woodcrest, DE | A tree uprooted near the intersection of Maryland Avenue and Boxwood Road with wires down. Time estimated from radar. |
| Sep 1, 8:31 PM EDT | TSTM WND GST 53 | New Castle County Airpo, DE | KILG gusted to 53 mph. |
| Sep 1, 8:32 PM EDT | TSTM WND DMG | Edgemoor, DE | EM relays report of multiple roads closed due to trees down in Edgemoor. Time estimated. |
| Sep 1, 8:32 PM EDT | TSTM WND DMG | Newark, DE | Trees down in Newark. Time estimated from radar. |
| Sep 1, 8:32 PM EDT | TSTM WND DMG | New Castle, DE | Trees down in New Castle. Time estimated from radar. |
| Sep 1, 8:32 PM EDT | TSTM WND DMG | Wilmington, DE | EM relays report of multiple roads closed due to trees down in Wilmington. Time estimated. |
| Sep 1, 8:35 PM EDT | TSTM WND DMG | Pennsville, NJ | Multiple reports of trees and wires down around Pennsville. Time estimated from radar. |
| Sep 1, 8:40 PM EDT | MARINE TSTM WIND 39 | 1 Ne Collins Park, DE | Mesonet station 1293W Del. Memorial Bridge. |
| Sep 1, 8:41 PM EDT | TSTM WND DMG | Salem, NJ | Reports of trees and power lines down in Salem. Time estimated from radar. |
| Sep 1, 8:46 PM EDT | TSTM WND DMG | 2 Ne Pennsville, NJ | Downed Tree on NJ 49 Eastbound East of I-295/US 40/New Jersey Turnpike (Pennsville Twp), 1 right lane of 2 lanes, right shoulder closed. Time estimated from radar. |
| Sep 1, 8:48 PM EDT | TSTM WND GST 68 | 1 Nne Delaware City, DE | Station DELD1 - 8551762 - Delaware City DE gusted to 59.1 kt. |
| Sep 1, 8:48 PM EDT | MARINE TSTM WIND 68 | 1 Nne Delaware City, DE | Station DELD1 - 8551762 - Delaware City DE gusted to 59.1 kt. |
| Sep 1, 8:53 PM EDT | TSTM WND GST 68 | 1 Wnw Elsinboro Twp, NJ | KNJSALEM28 gusted to 68 mph. |
| Sep 1, 8:53 PM EDT | MARINE TSTM WIND 68 | 1 Wnw Elsinboro Twp, NJ | KNJSALEM28 gusted to 68 mph. |
| Sep 1, 8:55 PM EDT | TSTM WND GST 70 | 4 Ssw Elsinboro Twp, NJ | Lower Alloways Creek. |
| Sep 1, 8:55 PM EDT | MARINE TSTM WIND 70 | 3 Se Port Penn, DE | Lower Alloways Creek. |
| Sep 1, 8:58 PM EDT | TSTM WND DMG | 1 Sse Salem, NJ | Downed Tree on NJ 49 Both Directions East of CR 658/Keasbey St/Yorke St (Salem), All lanes closed eastbound; All lanes closed westbound. Time estimated from radar. |
| Sep 1, 9:18 PM EDT | TSTM WND GST 53 | 1 S Odessa, DE | Mesonet station DEL13 Us 1 At Appoquinimink River. |
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 |
|---|---|---|---|
| Sep 1, 4:32 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.3 hours before the alert went out and 166 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
- 1278 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1771 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 4.1
The text
As transmitted.
598
WUUS51 KPHI 020017
SVRPHI
DEC003-NJC011-015-033-PAC029-045-020115-
/O.NEW.KPHI.SV.W.0352.260902T0017Z-260902T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
817 PM EDT Tue Sep 1 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
New Castle County in northern Delaware...
Northwestern Cumberland County in southern New Jersey...
Salem County in southern New Jersey...
West central Gloucester County in southern New Jersey...
Southern Chester County in southeastern Pennsylvania...
Southwestern Delaware County in southeastern Pennsylvania...
* Until 915 PM EDT.
* At 816 PM EDT, severe thunderstorms were located along a line
extending from Elam to Kennett Square to near Oxford, moving
southeast at 30 mph. This storm is producing damaging winds across
Chester County.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Emergency management.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Wilmington, Newark, Middletown, West Chester, Pennsville, Westtown,
Carneys Point, Elsmere, Kennett Square, New Castle, Penns Grove,
Salem, Oxford, Woodstown, Alloway, West Grove, Quinton, Swedesboro,
Delaware City, and Elmer.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 95 in Pennsylvania between mile markers 0 and 1.
Interstate 95 in Delaware between mile markers 1 and 23.
Interstate 295 in New Jersey between mile markers 0 and 10.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a DANGEROUS SITUATION. These storms are producing widespread
wind damage across Chester County. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows! 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 3985 7602 3987 7577 4001 7561 3951 7508
3942 7541 3940 7577 3972 7579 3972 7599
3982 7603
TIME...MOT...LOC 0016Z 328DEG 28KT 3985 7557 3983 7574 3982 7593
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
Staarmann3 follow-up statements
884
WWUS51 KPHI 020020
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
820 PM EDT Tue Sep 1 2026
DEC003-NJC011-015-033-PAC029-045-020115-
/O.CON.KPHI.SV.W.0352.000000T0000Z-260902T0115Z/
New Castle DE-Cumberland NJ-Salem NJ-Gloucester NJ-Chester PA-
Delaware PA-
820 PM EDT Tue Sep 1 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NEW CASTLE...NORTHWESTERN CUMBERLAND...SALEM...WEST CENTRAL
GLOUCESTER...SOUTHERN CHESTER AND SOUTHWESTERN DELAWARE COUNTIES...
At 819 PM EDT, severe thunderstorms were located along a line
extending from Talleyville to Hockessin to near Oxford, moving
southeast at 35 mph.
THESE ARE DESTRUCTIVE STORMS FOR southern Chester County and
northern Delaware, including the Wilmington area. This storm is
producing damaging winds across Chester County.
HAZARD...80 mph wind gusts and quarter size hail.
SOURCE...Emergency management.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
Locations impacted include...
Wilmington, Newark, Middletown, West Chester, Pennsville, Westtown,
Carneys Point, Elsmere, Kennett Square, New Castle, Penns Grove,
Salem, Oxford, Woodstown, Alloway, West Grove, Quinton, Swedesboro,
Delaware City, and Elmer.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 95 in Pennsylvania between mile markers 0 and 1.
Interstate 95 in Delaware between mile markers 1 and 23.
Interstate 295 in New Jersey between mile markers 0 and 10.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a DANGEROUS SITUATION. These storms are producing widespread
wind damage across Chester County. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.
Frequent cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3985 7602 3987 7577 4001 7561 3951 7508
3942 7541 3940 7577 3972 7579 3972 7599
3982 7603
TIME...MOT...LOC 0019Z 328DEG 29KT 3983 7556 3979 7572 3980 7591
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...80 MPH
$$
Staarmann336
WWUS51 KPHI 020031
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
831 PM EDT Tue Sep 1 2026
DEC003-NJC011-015-033-PAC029-045-020115-
/O.CON.KPHI.SV.W.0352.000000T0000Z-260902T0115Z/
New Castle DE-Cumberland NJ-Salem NJ-Gloucester NJ-Chester PA-
Delaware PA-
831 PM EDT Tue Sep 1 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NEW CASTLE...NORTHWESTERN CUMBERLAND...SALEM...WEST CENTRAL
GLOUCESTER...SOUTHERN CHESTER AND SOUTHWESTERN DELAWARE COUNTIES...
At 831 PM EDT, severe thunderstorms were located along a line
extending from Penns Grove to near New Castle to Appleton, moving
southeast at 45 mph.
THESE ARE DESTRUCTIVE STORMS FOR New Castle County and western Salem
County!
HAZARD...80 mph wind gusts and quarter size hail.
SOURCE...Emergency management.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
Locations impacted include...
Wilmington, Newark, Middletown, West Chester, Pennsville, Westtown,
Carneys Point, Elsmere, Kennett Square, New Castle, Penns Grove,
Salem, Oxford, Woodstown, Alloway, West Grove, Quinton, Swedesboro,
Delaware City, and Elmer.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 95 in Pennsylvania between mile markers 0 and 1.
Interstate 95 in Delaware between mile markers 1 and 23.
Interstate 295 in New Jersey between mile markers 0 and 10.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is an EXTREMELY DANGEROUS SITUATION with tornado-like wind
speeds expected. Mobile homes and high profile vehicles are
especially susceptible to winds of this magnitude and may be
overturned. For your protection move to an interior room on the
lowest floor of a building. These storms have the potential to cause
serious injury and significant property damage.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3985 7602 3987 7577 4001 7561 3951 7508
3942 7541 3940 7577 3972 7579 3972 7599
3982 7603
TIME...MOT...LOC 0031Z 330DEG 37KT 3975 7549 3965 7561 3970 7583
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...80 MPH
$$
Staarmann666
WWUS51 KPHI 020053
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
853 PM EDT Tue Sep 1 2026
PAC045-020102-
/O.CAN.KPHI.SV.W.0352.000000T0000Z-260902T0115Z/
Delaware PA-
853 PM EDT Tue Sep 1 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN DELAWARE COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
northern Delaware...southern New Jersey...and southeastern
Pennsylvania.
LAT...LON 3985 7602 3973 7564 3982 7545 3980 7541
3981 7540 3951 7508 3942 7541 3940 7577
3972 7579 3972 7599 3982 7603
TIME...MOT...LOC 0052Z 328DEG 28KT 3962 7538 3952 7550 3957 7572
$$
DEC003-NJC011-015-033-PAC029-020115-
/O.CON.KPHI.SV.W.0352.000000T0000Z-260902T0115Z/
New Castle DE-Cumberland NJ-Salem NJ-Gloucester NJ-Chester PA-
853 PM EDT Tue Sep 1 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NEW CASTLE...NORTHWESTERN CUMBERLAND...SALEM...WEST CENTRAL
GLOUCESTER AND SOUTHWESTERN CHESTER COUNTIES...
At 852 PM EDT, severe thunderstorms were located along a line
extending from near Woodstown to near Hancocks Bridge to near
Glasgow, moving southeast at 30 mph. These storms have a history of
producing widespread damaging winds across Chester and northern New
Castle Counties.
THESE ARE DESTRUCTIVE STORMS FOR southern Salem and western
Cumberland Counties in New Jersey, and New Castle and northern Kent
Counties in Delaware!
HAZARD...80 mph wind gusts and quarter size hail.
SOURCE...Emergency management.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
Locations impacted include...
Wilmington, Newark, Middletown, Pennsville, Carneys Point, Elsmere,
New Castle, Penns Grove, Salem, Oxford, Woodstown, Alloway, Quinton,
Swedesboro, Delaware City, Elmer, Newport, Shiloh, Stanton, and North
Star.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 95 in Pennsylvania near mile marker 0.
Interstate 95 in Delaware between mile markers 1 and 23.
Interstate 295 in New Jersey between mile markers 0 and 10.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is an EXTREMELY DANGEROUS SITUATION with tornado-like wind
speeds expected. Mobile homes and high profile vehicles are
especially susceptible to winds of this magnitude and may be
overturned. For your protection move to an interior room on the
lowest floor of a building. These storms have the potential to cause
serious injury and significant property damage.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
Frequent cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3985 7602 3973 7564 3982 7545 3980 7541
3981 7540 3951 7508 3942 7541 3940 7577
3972 7579 3972 7599 3982 7603
TIME...MOT...LOC 0052Z 328DEG 28KT 3962 7538 3952 7550 3957 7572
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...80 MPH
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 8:44 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| Sep 1, 9:19 PM EDT | Flash Flood Warning | PHI | Bucks | 116 min |
| Sep 2, 3:53 AM EDT | Heat Advisory | PHI | Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia | 40 hr |
| Sep 2, 12:40 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 65 min |
| Sep 1, 8:46 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 59 min |
| Sep 1, 9:40 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 65 min |
| Sep 2, 1:35 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 40 min |
| Sep 2, 2:05 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 40 min |
| Sep 2, 2:38 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 47 min |
| Sep 1, 8:05 PM EDT | Special Marine Warning | PHI | 85 min | |
| Sep 1, 8:08 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 52 min |
| Sep 1, 8:11 PM EDT | Special Marine Warning | PHI | 94 min | |
| Sep 1, 8:26 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Cumberland, Gloucester | 49 min |
| Sep 1, 8:57 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester, Salem | 48 min |
| Sep 1, 9:04 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 71 min |
| Sep 1, 9:07 PM EDT | Tornado Warning | PHI | Burlington | 21 min |
| Sep 1, 9:16 PM EDT | Tornado Warning | PHI | Burlington | 12 min |
| Sep 1, 9:22 PM EDT | Special Marine Warning | PHI | 68 min | |
| Sep 1, 9:25 PM EDT | Special Marine Warning | PHI | 95 min | |
| Sep 1, 9:26 PM EDT | Flash Flood Warning | PHI | Atlantic, Camden, Gloucester | 115 min |
| Sep 1, 9:33 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Cape May, Ocean | 57 min |
| Sep 1, 9:54 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 42 min |
| Sep 1, 10:06 PM EDT | Special Marine Warning | PHI | 84 min | |
| Sep 1, 10:48 PM EDT | Special Marine Warning | PHI | 57 min | |
| Sep 1, 11:12 PM EDT | Special Marine Warning | PHI | 63 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2026Severe Thunderstorm Warnings in Pennsylvania, 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.