Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 182, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 9, 2023, 5:10 PM EDT for New Castle County, Delaware; Delaware County, Pennsylvania; Gloucester County, Salem County, New Jersey. It was in force for 50 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
- Jul 9, 2023, 5:10 PM EDT (21:10 UTC)
- Expired
- Jul 9, 2023, 6:00 PM EDT
- In force
- 50 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Gloucester County, NJ, Salem County, NJ, Delaware County, PA
The radar
The Dover AFB radar (KDOX), 94 km from the middle of the area, began a volume at 21:14 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 |
|---|---|---|---|
| Jul 9, 11:06 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.2 hours before the alert went out and 185 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
- 952 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 686 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
538
WUUS51 KPHI 092110
SVRPHI
DEC003-NJC015-033-PAC045-092200-
/O.NEW.KPHI.SV.W.0182.230709T2110Z-230709T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
510 PM EDT Sun Jul 9 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern New Castle County in northern Delaware...
Northwestern Salem County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
South central Delaware County in southeastern Pennsylvania...
* Until 600 PM EDT.
* At 510 PM EDT, a severe thunderstorm was located over Pennsville,
or 7 miles south of Wilmington, moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Wilmington, Chester, Pennsville, Carneys Point, New Castle, Penns
Grove, Salem, Woodstown, Swedesboro, Beckett, Delaware Memorial
Bridge, Wilmington Manor, Marcus Hook, Trainer and Edgemoor.
This includes the following highways...
New Jersey Turnpike between exits 1 and 2.
Interstate 295 in New Jersey between mile markers 0 and 14.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3967 7562 3985 7536 3966 7518 3952 7552
TIME...MOT...LOC 2110Z 234DEG 34KT 3964 7548
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB2 follow-up statements
050
WWUS51 KPHI 092126
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
526 PM EDT Sun Jul 9 2023
DEC003-PAC045-092135-
/O.CAN.KPHI.SV.W.0182.000000T0000Z-230709T2200Z/
New Castle DE-Delaware PA-
526 PM EDT Sun Jul 9 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEW CASTLE AND
SOUTH CENTRAL DELAWARE COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
northern Delaware...southern New Jersey...and southeastern
Pennsylvania.
LAT...LON 3972 7551 3971 7550 3972 7548 3976 7547
3979 7543 3979 7541 3981 7540 3984 7536
3966 7518 3957 7546 3969 7554
TIME...MOT...LOC 2125Z 234DEG 34KT 3973 7532
$$
NJC015-033-092200-
/O.CON.KPHI.SV.W.0182.000000T0000Z-230709T2200Z/
Salem NJ-Gloucester NJ-
526 PM EDT Sun Jul 9 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHWESTERN SALEM AND WEST CENTRAL GLOUCESTER COUNTIES...
At 525 PM EDT, a severe thunderstorm was located over Swedesboro, or
10 miles east of Wilmington, moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Wilmington, Chester, Pennsville, Carneys Point, New Castle, Penns
Grove, Salem, Woodstown, Swedesboro, Beckett, Delaware Memorial
Bridge and Trainer.
This includes the following highways...
New Jersey Turnpike between exits 1 and 2.
Interstate 295 in New Jersey between mile markers 0 and 13.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3972 7551 3971 7550 3972 7548 3976 7547
3979 7543 3979 7541 3981 7540 3984 7536
3966 7518 3957 7546 3969 7554
TIME...MOT...LOC 2125Z 234DEG 34KT 3973 7532
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB564
WWUS51 KPHI 092136
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
536 PM EDT Sun Jul 9 2023
NJC015-033-092200-
/O.CON.KPHI.SV.W.0182.000000T0000Z-230709T2200Z/
Salem NJ-Gloucester NJ-
536 PM EDT Sun Jul 9 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHWESTERN SALEM AND WEST CENTRAL GLOUCESTER COUNTIES...
At 536 PM EDT, a severe thunderstorm was located over West Deptford,
or 8 miles southwest of Gloucester City, moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Wilmington, Chester, Carneys Point, Penns Grove, Woodstown,
Swedesboro, Beckett and Trainer.
This includes the following highways...
New Jersey Turnpike between exits 1 and 2.
Interstate 295 in New Jersey between mile markers 3 and 13.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3976 7547 3979 7543 3979 7541 3981 7540
3984 7536 3966 7518 3959 7539 3971 7549
3972 7549 3972 7548
TIME...MOT...LOC 2136Z 234DEG 34KT 3979 7521
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 4:01 PM EDT | Special Weather Statement | PHI | Kent | 29 min |
| Jul 9, 4:16 PM EDT | Special Weather Statement | PHI | New Castle | 29 min |
| Jul 9, 4:40 PM EDT | Areal Flood Advisory | PHI | New Castle | 29 min |
| Jul 9, 4:40 PM EDT | Special Weather Statement | PHI | Kent | 35 min |
| Jul 9, 4:46 PM EDT | Special Weather Statement | PHI | New Castle | 29 min |
| Jul 9, 4:49 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 41 min |
| Jul 9, 5:01 PM EDT | Special Weather Statement | PHI | Kent, Sussex | 29 min |
| Jul 9, 5:02 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 3 hr |
| Jul 9, 5:09 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Jul 9, 5:31 PM EDT | Special Weather Statement | PHI | Sussex | 29 min |
| Jul 9, 11:00 AM EDT | Special Weather Statement | PHI | Carbon | 30 min |
| Jul 9, 11:33 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 8 hr |
| Jul 9, 11:47 AM EDT | Special Weather Statement | PHI | Monroe | 43 min |
| Jul 9, 11:49 AM EDT | Special Weather Statement | PHI | Montgomery | 41 min |
| Jul 9, 11:54 AM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Lehigh, Montgomery | 33 min |
| Jul 9, 12:14 PM EDT | Special Weather Statement | PHI | Bucks | 46 min |
| Jul 9, 12:15 PM EDT | Special Weather Statement | PHI | Monroe | 30 min |
| Jul 9, 12:22 PM EDT | Special Weather Statement | PHI | Lebanon | 38 min |
| Jul 9, 12:27 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 8 hr |
| Jul 9, 12:37 PM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Northampton | 2 hr |
| Jul 9, 12:43 PM EDT | Areal Flood Advisory | PHI | Berks | 33 min |
| Jul 9, 12:51 PM EDT | Special Weather Statement | PHI | Northampton | 24 min |
| Jul 9, 12:57 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 6 hr |
| Jul 9, 1:02 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Northampton | 8 hr |
| Jul 9, 1:16 PM EDT | Flash Flood Warning | PHI | Berks | 6 hr |
| Jul 9, 1:17 PM EDT | Special Weather Statement | PHI | Berks | 28 min |
| Jul 9, 1:32 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 4 hr |
| Jul 9, 2:16 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 30 min |
| Jul 9, 2:41 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jul 9, 2:46 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh, Northampton | 6 hr |
| Jul 9, 3:01 PM EDT | Special Weather Statement | PHI | Berks | 29 min |
| Jul 9, 3:03 PM EDT | Special Weather Statement | PHI | Chester | 27 min |
| Jul 9, 3:15 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 30 min |
| Jul 9, 3:20 PM EDT | Special Weather Statement | PHI | Berks | 25 min |
| Jul 9, 3:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 33 min |
| Jul 9, 3:41 PM EDT | Special Weather Statement | PHI | Berks | 34 min |
| Jul 9, 3:51 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Lehigh, Montgomery | 6 hr |
| Jul 9, 3:59 PM EDT | Special Weather Statement | PHI | Chester | 31 min |
| Jul 9, 4:03 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery | 27 min |
| Jul 9, 4:19 PM EDT | Special Weather Statement | PHI | Chester | 26 min |
| Jul 9, 4:31 PM EDT | Flash Flood Warning | PHI | Chester, Montgomery | 4 hr |
| Jul 9, 5:12 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 5 hr |
| Jul 9, 5:15 PM EDT | Special Weather Statement | PHI | Bucks, Delaware, Philadelphia | 30 min |
| Jul 9, 5:31 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 9, 5:35 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 25 min |
| Jul 9, 5:59 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 4 hr |
| Jul 9, 6:05 PM EDT | Special Weather Statement | PHI | Bucks | 25 min |
| Jul 9, 7:04 PM EDT | Areal Flood Warning | PHI | Berks | 9 hr |
| Jul 9, 7:11 PM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Jul 9, 7:27 PM EDT | River Flood Warning | PHI | Chester | 4 hr |
| Jul 9, 1:57 PM EDT | Areal Flood Advisory | PHI | Morris, Sussex, Warren | 65 min |
| Jul 9, 2:05 PM EDT | Flash Flood Warning | PHI | Sussex | 6 hr |
| Jul 9, 2:30 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Warren | 4 min |
| Jul 9, 2:34 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Warren | 6 hr |
| Jul 9, 2:59 PM EDT | Special Weather Statement | PHI | Somerset | 31 min |
| Jul 9, 3:00 PM EDT | Flash Flood Warning | PHI | Morris, Somerset, Sussex, Warren | 6 hr |
| Jul 9, 4:12 PM EDT | Special Weather Statement | PHI | Somerset | 33 min |
| Jul 9, 4:34 PM EDT | Special Marine Warning | PHI | 86 min | |
| Jul 9, 4:57 PM EDT | Special Marine Warning | PHI | 93 min | |
| Jul 9, 4:58 PM EDT | Special Weather Statement | PHI | Cumberland, Salem | 47 min |
| Jul 9, 5:49 PM EDT | Special Weather Statement | PHI | Cumberland | 26 min |
| Jul 9, 5:59 PM EDT | Special Weather Statement | PHI | Cape May | 46 min |
| Jul 9, 6:33 PM EDT | Special Marine Warning | PHI | 87 min | |
| Jul 9, 6:52 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 4 hr |
| Jul 9, 7:16 PM EDT | Special Weather Statement | PHI | Burlington | 29 min |
| Jul 9, 7:21 PM EDT | Special Marine Warning | PHI | 114 min | |
| Jul 9, 7:29 PM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 10 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2023Severe Thunderstorm Warnings in Delaware, 2023Severe Thunderstorm Warnings in Pennsylvania, 2023Every severe thunderstorm warning in 2023
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.