Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 170, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 4, 2023, 5:44 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey. It was in force for 46 min. 37 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
- Jul 4, 2023, 5:44 PM EDT (21:44 UTC)
- Expired
- Jul 4, 2023, 6:30 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ
The radar
The Philadelphia radar (KDIX), 53 km from the middle of the area, began a volume at 21:48 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 |
|---|---|---|---|
| Jul 4, 5:50 PM EDT | TSTM WND DMG | 1 Sw Evesham Twp, NJ | Trees down at Marlton Parkway and Sagemore Drive. Time estimated from radar. |
| Jul 4, 5:50 PM EDT | TSTM WND DMG | 1 Sw Evesham Twp, NJ | Trees down at Marlton Parkway and Sagemore Drive. Time estimated from radar. |
| Jul 4, 5:50 PM EDT | TSTM WND DMG | 1 Sw Evesham Twp, NJ | Trees down at Marlton Parkway and Sagemore Drive. Time estimated from radar. |
| Jul 4, 5:50 PM EDT | TSTM WND DMG | 1 Wsw Lake Pine, NJ | Some trees down. Time estimated from radar. |
| Jul 4, 5:50 PM EDT | TSTM WND DMG | 1 Wsw Lake Pine, NJ | Some trees down. Time estimated from radar. |
| Jul 4, 5:50 PM EDT | TSTM WND DMG | 1 Wsw Lake Pine, NJ | Some trees down. Time estimated from radar. |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | Haddonfield, NJ | A downburst occurred in the area of Haddonfield, NJ on Tuesday, July 4, 2023 resulting in widespread wind damage with numerous large trees uprooted or snapped at the trunk, bringing down powerlines and resulting in multiple road closures across town. Time esti |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | Haddonfield, NJ | A downburst occurred in the area of Haddonfield, NJ on Tuesday, July 4, 2023 resulting in widespread wind damage with numerous large trees uprooted or snapped at the trunk, bringing down powerlines and resulting in multiple road closures across town. Time esti |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | Haddonfield, NJ | Multiple trees down along Kings Hwy E and Sylvan Lake Ave at Haddonfield Memorial High School and Haddonfield Baptist Cemetery. Sylvan Lake Ave closed due to tree and power lines across the roadway. Time estimated by radar. |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | Haddonfield, NJ | Multiple trees down along Kings Hwy E and Sylvan Lake Ave at Haddonfield Memorial High School and Haddonfield Baptist Cemetery. Sylvan Lake Ave closed due to tree and power lines across the roadway. Time estimated by radar. |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | Haddonfield, NJ | Numerous downed trees, poles, and power lines across the neighborhood between downtown Haddonfield and Mountwell Park. |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | Haddonfield, NJ | Numerous downed trees, poles, and power lines across the neighborhood between downtown Haddonfield and Mountwell Park. |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | Haddonfield, NJ | Tree and power lines down across Centre Street at Ellis Street. Road closed. Time estimated by radar. |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | Haddonfield, NJ | Tree and power lines down across Centre Street at Ellis Street. Road closed. Time estimated by radar. |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | West Haddonfield, NJ | Multiple roads closed due to downed trees, power lines, and flooding. Time estimated by radar. |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | West Haddonfield, NJ | Multiple roads closed due to downed trees, power lines, and flooding. Time estimated by radar. |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | West Haddonfield, NJ | Multiple trees down on homes. Time estimated by radar. |
| Jul 4, 6:00 PM EDT | TSTM WND DMG | West Haddonfield, NJ | Multiple trees down on homes. Time estimated by radar. |
| Jul 4, 6:02 PM EDT | TSTM WND DMG | 1 Sw Haddonfield, NJ | Power line down, pole on house. Time estimated by radar. |
| Jul 4, 6:02 PM EDT | TSTM WND DMG | 1 Sw Haddonfield, NJ | Power line down, pole on house. Time estimated by radar. |
| Jul 4, 6:05 PM EDT | TSTM WND DMG | 1 N Lawnside, NJ | Tree across roadway. Time estimated by radar. |
| Jul 4, 6:05 PM EDT | TSTM WND DMG | 1 N Lawnside, NJ | Tree across roadway. Time estimated by radar. |
| Jul 4, 6:05 PM EDT | TSTM WND GST 60 | Mt. Ephraim, NJ | Estimated 60 mph wind gust. Time estimated from radar. |
| Jul 4, 6:05 PM EDT | TSTM WND GST 60 | Mt. Ephraim, NJ | Estimated 60 mph wind gust. Time estimated from radar. |
| Jul 4, 6:05 PM EDT | TSTM WND GST 60 | Mt. Ephraim, NJ | Estimated 60 mph wind gust. Time estimated from radar. |
| Jul 4, 6:10 PM EDT | TSTM WND DMG | 1 W Mt. Ephraim, NJ | A downburst occurred around Mt. Ephraim, Brooklawn, and Westville, NJ on Tuesday, July 4, 2023, resulting in severe winds and downed trees across the area. Time estimated by radar. |
| Jul 4, 6:10 PM EDT | TSTM WND DMG | 1 W Mt. Ephraim, NJ | A downburst occurred around Mt. Ephraim, Brooklawn, and Westville, NJ on Tuesday, July 4, 2023, resulting in severe winds and downed trees across the area. Time estimated by radar. |
| Jul 4, 6:12 PM EDT | TSTM WND GST 60 | 1 Nnw Ashland, NJ | Estimated 50 to 60 mph wind gusts on Interstate 295 southbound by Woodcrest Station. Small branches flying onto the roadway. Time estimated from radar. |
| Jul 4, 6:12 PM EDT | TSTM WND GST 60 | 1 Nnw Ashland, NJ | Estimated 50 to 60 mph wind gusts on Interstate 295 southbound by Woodcrest Station. Small branches flying onto the roadway. Time estimated from radar. |
| Jul 4, 6:12 PM EDT | TSTM WND GST 60 | 1 Nnw Ashland, NJ | Estimated 50 to 60 mph wind gusts on Interstate 295 southbound by Woodcrest Station. Small branches flying onto the roadway. Time estimated from radar. |
| Jul 4, 6:14 PM EDT | TSTM WND DMG | Haddonfield, NJ | trees, wires, and numerous large branches down; street flooding; navigation difficult. |
| Jul 4, 6:14 PM EDT | TSTM WND DMG | Haddonfield, NJ | trees, wires, and numerous large branches down; street flooding; navigation difficult. |
| Jul 4, 6:14 PM EDT | TSTM WND DMG | Haddonfield, NJ | trees, wires, and numerous large branches down; street flooding; navigation difficult. |
| Jul 4, 6:18 PM EDT | TSTM WND DMG | 1 Ssw Westville, NJ | Tree down on Cedar Ave. Time estimated by radar. |
| Jul 4, 6:18 PM EDT | TSTM WND DMG | 1 Ssw Westville, NJ | Tree down on Cedar Ave. Time estimated by radar. |
| Jul 4, 6:30 PM EDT | TSTM WND DMG | Westville, NJ | Tree down on Highland Ave. Time estimated by radar. |
| Jul 4, 6:30 PM EDT | TSTM WND DMG | Westville, NJ | Tree down on Highland Ave. Time estimated by radar. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 9.7 hours before the alert went out and 215 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
- 489 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 701 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.1
The text
As transmitted.
956
WUUS51 KPHI 042144
SVRPHI
NJC005-007-015-042230-
/O.NEW.KPHI.SV.W.0170.230704T2144Z-230704T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
544 PM EDT Tue Jul 4 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Camden County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
West central Burlington County in southern New Jersey...
* Until 630 PM EDT.
* At 544 PM EDT, severe thunderstorms were located along a line
extending from Gloucester City to near Leisuretowne, moving
southwest at 5 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...
Camden, Gloucester City, Cherry Hill, Evesham, Mount Laurel,
Deptford, Voorhees, Medford, West Deptford, Lindenwold, Bellmawr,
Woodbury, Pitman, Berlin, Paulsboro, Magnolia, Westville, Woodbury
Heights, National Park and Swedesboro.
This includes the following highways...
New Jersey Turnpike between exits 2 and 4.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 18 and 37.
Interstate 676 in New Jersey between mile markers 0 and 3.
Atlantic City Expressway between mile markers 41 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 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 3974 7473 3974 7534 3988 7518 3988 7515
3990 7513 3993 7514 3994 7512 3994 7470
TIME...MOT...LOC 2144Z 024DEG 5KT 3991 7514 3990 7475
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL3 follow-up statements
102
WWUS51 KPHI 042159
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
559 PM EDT Tue Jul 4 2023
NJC005-007-015-042230-
/O.CON.KPHI.SV.W.0170.000000T0000Z-230704T2230Z/
Camden NJ-Gloucester NJ-Burlington NJ-
559 PM EDT Tue Jul 4 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CAMDEN...NORTHWESTERN GLOUCESTER AND WEST CENTRAL BURLINGTON
COUNTIES...
At 559 PM EDT, severe thunderstorms were located along a line
extending from Gloucester City to near Medford, moving southwest at 5
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...
Camden, Gloucester City, Cherry Hill, Evesham, Mount Laurel,
Deptford, Voorhees, Medford, West Deptford, Lindenwold, Bellmawr,
Woodbury, Pitman, Berlin, Paulsboro, Magnolia, Westville, Woodbury
Heights, National Park and Swedesboro.
This includes the following highways...
New Jersey Turnpike between exits 2 and 4.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 18 and 37.
Interstate 676 in New Jersey between mile markers 0 and 3.
Atlantic City Expressway between mile markers 41 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
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 3974 7474 3974 7534 3988 7518 3988 7515
3990 7513 3993 7514 3994 7512 3994 7477
TIME...MOT...LOC 2159Z 024DEG 5KT 3989 7515 3988 7476
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL074
WWUS51 KPHI 042217
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
617 PM EDT Tue Jul 4 2023
NJC005-007-015-042230-
/O.CON.KPHI.SV.W.0170.000000T0000Z-230704T2230Z/
Camden NJ-Gloucester NJ-Burlington NJ-
617 PM EDT Tue Jul 4 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTHERN CAMDEN...NORTHWESTERN GLOUCESTER AND WEST CENTRAL
BURLINGTON COUNTIES...
At 616 PM EDT, severe thunderstorms were located along a line
extending from National Park to near Medford, moving southwest at 5
mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters. At 610 PM, a trained weather
spotter reported widespread tree damage and downed power
lines across Haddonfield, NJ.
IMPACT...Minor damage to vehicles is possible. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Camden, Gloucester City, Cherry Hill, Evesham, Deptford, Voorhees,
West Deptford, Lindenwold, Bellmawr, Woodbury, Pitman, Berlin,
Paulsboro, Magnolia, Westville, Woodbury Heights, National Park,
Swedesboro, Brooklawn and Chesilhurst.
This includes the following highways...
New Jersey Turnpike between exits 2 and 3.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 18 and 36.
Interstate 676 in New Jersey between mile markers 0 and 2.
Atlantic City Expressway between mile markers 41 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This is a DANGEROUS SITUATION. These storms are producing widespread
wind damage across Haddonfield, NJ and surrounding areas. 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 3974 7482 3974 7534 3988 7518 3988 7515
3990 7513 3993 7514 3993 7486
TIME...MOT...LOC 2216Z 024DEG 5KT 3987 7516 3986 7477
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
MJL963
WWUS51 KPHI 042232
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
632 PM EDT Tue Jul 4 2023
NJC005-007-015-042240-
/O.EXP.KPHI.SV.W.0170.000000T0000Z-230704T2230Z/
Camden NJ-Gloucester NJ-Burlington NJ-
632 PM EDT Tue Jul 4 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CAMDEN...NORTHWESTERN
GLOUCESTER AND WEST CENTRAL BURLINGTON COUNTIES HAS EXPIRED...
The storms which prompted the warning continues to remain severe and
a new Severe Thunderstorm Warning has been issued until 715 PM EDT.
LAT...LON 3974 7482 3974 7534 3988 7518 3988 7515
3990 7513 3993 7514 3993 7486
TIME...MOT...LOC 2230Z 024DEG 5KT 3985 7517 3984 7478
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 8:27 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 48 min |
| Jul 3, 8:34 PM EDT | Special Marine Warning | PHI | 116 min | |
| Jul 3, 8:41 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 49 min |
| Jul 3, 8:50 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Sussex, Warren | 115 min |
| Jul 3, 8:58 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 47 min |
| Jul 3, 9:02 PM EDT | Special Marine Warning | PHI | 118 min | |
| Jul 3, 9:07 PM EDT | Flash Flood Warning | PHI | Salem | 5 hr |
| Jul 3, 9:22 PM EDT | Areal Flood Advisory | PHI | Morris | 83 min |
| Jul 3, 9:25 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Gloucester, Salem | 35 min |
| Jul 3, 9:52 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Salem | 38 min |
| Jul 3, 10:36 PM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 4 hr |
| Jul 4, 1:58 PM EDT | Special Weather Statement | PHI | Monmouth | 32 min |
| Jul 4, 2:51 PM EDT | Special Weather Statement | PHI | Middlesex | 24 min |
| Jul 4, 2:58 PM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth | 3 hr |
| Jul 4, 3:09 PM EDT | Areal Flood Advisory | PHI | Middlesex, Morris, Somerset | 2 hr |
| Jul 4, 3:16 PM EDT | Special Weather Statement | PHI | Mercer, Middlesex, Monmouth | 29 min |
| Jul 4, 3:19 PM EDT | Special Weather Statement | PHI | Passaic | 26 min |
| Jul 4, 3:22 PM EDT | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Monmouth, Ocean | 38 min |
| Jul 4, 3:34 PM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth, Somerset | 2 hr |
| Jul 4, 3:45 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 45 min |
| Jul 4, 3:52 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 38 min |
| Jul 4, 4:11 PM EDT | Areal Flood Advisory | PHI | Mercer, Middlesex, Monmouth, Ocean | 2 hr |
| Jul 4, 4:19 PM EDT | Special Marine Warning | PHI | 56 min | |
| Jul 4, 4:24 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Monmouth, Ocean | 36 min |
| Jul 4, 4:26 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 23 min |
| Jul 4, 4:43 PM EDT | Areal Flood Advisory | PHI | Burlington, Mercer, Monmouth, Ocean | 2 hr |
| Jul 4, 4:59 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Ocean | 46 min |
| Jul 4, 5:23 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden | 112 min |
| Jul 4, 5:30 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 33 min |
| Jul 4, 5:46 PM EDT | Flash Flood Warning | PHI | Burlington, Camden | 3 hr |
| Jul 4, 6:02 PM EDT | Special Weather Statement | PHI | Middlesex | 28 min |
| Jul 4, 6:06 PM EDT | Areal Flood Advisory | PHI | Warren | 114 min |
| Jul 4, 6:29 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester | 21 min |
| Jul 4, 7:05 PM EDT | Areal Flood Advisory | PHI | Camden, Gloucester | 2 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.