Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 215, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2023, 5:43 AM EDT for 5 counties in New Jersey. It was in force for 47 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 21, 2023, 5:43 AM EDT (09:43 UTC)
- Expired
- Jul 21, 2023, 6:30 AM EDT
- In force
- 47 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Atlantic County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ
The radar
The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 09:42 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 21, 3:13 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 9.7 hours before the alert went out and 180 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
- 911 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 943 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.2
The text
As transmitted.
768
WUUS51 KPHI 210943
SVRPHI
NJC001-007-011-015-033-211030-
/O.NEW.KPHI.SV.W.0215.230721T0943Z-230721T1030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
543 AM EDT Fri Jul 21 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Atlantic County in southern New Jersey...
Northeastern Cumberland County in southern New Jersey...
East central Salem County in southern New Jersey...
Southeastern Camden County in southern New Jersey...
Southeastern Gloucester County in southern New Jersey...
* Until 630 AM EDT.
* At 543 AM EDT, a severe thunderstorm was located over Olivet, or 7
miles northwest of Vineland, moving northeast at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Vineland, Millville, Hammonton, Buena, Weymouth, Estell Manor,
Chesilhurst, Newfield, Elmer, Franklinville, Victory Lakes,
Williamstown, Mays Landing, Olivet, Malaga, Mizpah, Monroe
Township, South Vineland, Rosenhayn and Folsom.
This includes Atlantic City Expressway between mile markers 20 and
36.
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 3942 7516 3956 7522 3976 7485 3943 7465
TIME...MOT...LOC 0943Z 245DEG 15KT 3953 7512
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL2 follow-up statements
684
WWUS51 KPHI 211010
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
610 AM EDT Fri Jul 21 2023
NJC033-211020-
/O.CAN.KPHI.SV.W.0215.000000T0000Z-230721T1030Z/
Salem NJ-
610 AM EDT Fri Jul 21 2023
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SALEM COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 AM EDT for
southern New Jersey.
LAT...LON 3943 7465 3942 7510 3953 7502 3969 7481
TIME...MOT...LOC 1010Z 270DEG 15KT 3957 7498
$$
NJC001-007-011-015-211030-
/O.CON.KPHI.SV.W.0215.000000T0000Z-230721T1030Z/
Atlantic NJ-Cumberland NJ-Camden NJ-Gloucester NJ-
610 AM EDT Fri Jul 21 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM EDT
FOR NORTHWESTERN ATLANTIC...NORTHEASTERN CUMBERLAND...SOUTHEASTERN
CAMDEN AND SOUTHEASTERN GLOUCESTER COUNTIES...
At 610 AM EDT, a severe thunderstorm was located over Newfield, or 7
miles north of Vineland, moving east at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Vineland, Millville, Hammonton, Buena, Weymouth, Estell Manor,
Newfield, Mays Landing, Mizpah, South Vineland, Folsom and Collings
Lakes.
This includes Atlantic City Expressway between mile markers 20 and
31.
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 3943 7465 3942 7510 3953 7502 3969 7481
TIME...MOT...LOC 1010Z 270DEG 15KT 3957 7498
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJL767
WWUS51 KPHI 211022
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
622 AM EDT Fri Jul 21 2023
NJC001-007-011-015-211030-
/O.EXP.KPHI.SV.W.0215.000000T0000Z-230721T1030Z/
Atlantic NJ-Cumberland NJ-Camden NJ-Gloucester NJ-
622 AM EDT Fri Jul 21 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ATLANTIC...
NORTHEASTERN CUMBERLAND...SOUTHEASTERN CAMDEN AND SOUTHEASTERN
GLOUCESTER COUNTIES WILL EXPIRE AT 630 AM EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire. However heavy rain is still possible with this
thunderstorm.
A Severe Thunderstorm Watch remains in effect until 800 AM EDT for
southern New Jersey.
Remember, a Severe Thunderstorm Warning still remains in effect for
southwestern Atlantic County and southeastern Cumberland County in
southern New Jersey until 700 AM EDT.
LAT...LON 3943 7465 3942 7510 3953 7502 3969 7481
TIME...MOT...LOC 1020Z 245DEG 15KT 3959 7494
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 3:10 AM EDT | Severe Thunderstorm Warning | PHI | Warren | 39 min |
| Jul 21, 4:36 AM EDT | Special Marine Warning | PHI | 54 min | |
| Jul 21, 4:56 AM EDT | Special Weather Statement | PHI | Morris | 34 min |
| Jul 21, 6:16 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 44 min |
| Jul 21, 6:52 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Ocean | 23 min |
| Jul 21, 6:59 AM EDT | Special Marine Warning | PHI | 61 min | |
| Jul 21, 7:14 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 46 min |
| Jul 21, 7:26 AM EDT | Special Marine Warning | PHI | 64 min | |
| Jul 21, 7:49 AM EDT | Special Marine Warning | PHI | 56 min | |
| Jul 21, 8:09 AM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 21, 9:18 AM EDT | Special Marine Warning | PHI | 42 min | |
| Jul 21, 10:00 AM EDT | Special Marine Warning | PHI | 60 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.