Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 295, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 13, 2023, 1:41 AM EDT for 4 counties in New Jersey. It was in force for 33 min. 6 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
- Aug 13, 2023, 1:41 AM EDT (05:41 UTC)
- Expired
- Aug 13, 2023, 2:14 AM EDT
- In force
- 33 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Hunterdon County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 77 km from the middle of the area, began a volume at 05:44 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 |
|---|---|---|---|
| Aug 13, 1:45 AM EDT | TSTM WND DMG | Bridgewater, NJ | Trees down. Photos received via social media. Time estimated from radar. |
| Aug 13, 1:48 AM EDT | TSTM WND DMG | Bernardsville, NJ | Tree on house in Bernardsville. Time estimated from radar. |
| Aug 13, 1:53 AM EDT | TSTM WND DMG | 1 Wsw Millington, NJ | Trees down on Keats Road. Time estimated from radar. |
| Aug 13, 1:54 AM EDT | TSTM WND DMG | Highland Park, NJ | Large tree limbs down which damaged a car. Time estimated from radar. |
| Aug 13, 1:58 AM EDT | TSTM WND DMG | 1 Sw Millington, NJ | Two trees on a house and also some snapped tree tops on Haas Road between Keats Road and Pond Hill Road.Time estimated from radar. |
| Aug 13, 1:58 AM EDT | TSTM WND DMG | Basking Ridge, NJ | Several large tree limbs down. Photos received via social media. Time estimated from 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 00:00Z, 5.7 hours before the alert went out and 129 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
- 358 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 1179 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.5
The text
As transmitted.
217
WUUS51 KPHI 130541
SVRPHI
NJC019-023-027-035-130630-
/O.NEW.KPHI.SV.W.0295.230813T0541Z-230813T0630Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
141 AM EDT Sun Aug 13 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
East central Hunterdon County in northwestern New Jersey...
Southeastern Morris County in northern New Jersey...
Somerset County in northern New Jersey...
Middlesex County in northern New Jersey...
* Until 230 AM EDT.
* At 141 AM EDT, severe thunderstorms were located along a line
extending from near Lebanon to near Flagtown to Rocky Hill, moving
northeast at 50 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
New Brunswick, Perth Amboy, Morristown, Somerville, Somerset,
Edison, Old Bridge, East Brunswick, Bridgewater, South Brunswick,
Sayreville, North Brunswick, Carteret, Madison, Middlesex, Florham
Park, East Hanover, Lincoln Park, Bound Brook and Manville.
People at the LIV Golf should seek safe shelter immediately!
This includes the following highways...
New Jersey Turnpike between exits 10 and 13.
Interstate 78 in New Jersey between mile markers 20 and 42.
Interstate 80 in New Jersey between mile markers 40 and 48.
Interstate 287 in New Jersey between mile markers 0 and 53.
Garden State Parkway between mile markers 121 and 134.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
4045 7423 4043 7425 4036 7461 4055 7460
4064 7487 4100 7430 4090 7427 4091 7434
4083 7433 4076 7438 4075 7436 4067 7446
4065 7440 4060 7446 4060 7421
TIME...MOT...LOC 0541Z 226DEG 44KT 4068 7480 4054 7465 4038 7464
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
RCM3 follow-up statements
950
WWUS51 KPHI 130602
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
202 AM EDT Sun Aug 13 2023
NJC019-130612-
/O.CAN.KPHI.SV.W.0295.000000T0000Z-230813T0630Z/
Hunterdon NJ-
202 AM EDT Sun Aug 13 2023
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL HUNTERDON COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
4045 7423 4043 7425 4040 7447 4059 7450
4068 7462 4100 7430 4090 7427 4091 7434
4083 7433 4076 7438 4075 7436 4067 7446
4065 7440 4060 7446 4060 7421
TIME...MOT...LOC 0602Z 226DEG 44KT 4085 7457 4071 7442 4055 7441
$$
NJC023-027-035-130630-
/O.CON.KPHI.SV.W.0295.000000T0000Z-230813T0630Z/
Morris NJ-Somerset NJ-Middlesex NJ-
202 AM EDT Sun Aug 13 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM EDT
FOR SOUTHEASTERN MORRIS...NORTHEASTERN SOMERSET AND NORTHEASTERN
MIDDLESEX COUNTIES...
At 202 AM EDT, severe thunderstorms were located along a line
extending from near Victory Gardens to near Chatham to near Edison,
moving northeast at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
New Brunswick, Perth Amboy, Morristown, Somerset, Edison, Old Bridge,
East Brunswick, Sayreville, North Brunswick, Carteret, Madison,
Middlesex, Florham Park, East Hanover, Lincoln Park, Chatham,
Boonton, Morris Plains, Riverdale and Far Hills.
This includes the following highways...
New Jersey Turnpike between exits 10 and 13.
Interstate 78 in New Jersey between mile markers 35 and 42.
Interstate 80 in New Jersey between mile markers 43 and 48.
Interstate 287 in New Jersey between mile markers 0 and 9, between
mile markers 25 and 43, and between mile markers 46 and 53.
Garden State Parkway between mile markers 121 and 134.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
4045 7423 4043 7425 4040 7447 4059 7450
4068 7462 4100 7430 4090 7427 4091 7434
4083 7433 4076 7438 4075 7436 4067 7446
4065 7440 4060 7446 4060 7421
TIME...MOT...LOC 0602Z 226DEG 44KT 4085 7457 4071 7442 4055 7441
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM505
WWUS51 KPHI 130610
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
210 AM EDT Sun Aug 13 2023
NJC027-035-130620-
/O.CAN.KPHI.SV.W.0295.000000T0000Z-230813T0630Z/
Morris NJ-Somerset NJ-
210 AM EDT Sun Aug 13 2023
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORRIS AND
NORTHEASTERN SOMERSET COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened. Therefore, the
warning has been cancelled.
LAT...LON 4055 7425 4050 7426 4050 7428 4047 7427
4045 7423 4043 7425 4042 7433 4057 7442
4060 7447 4060 7430 4059 7428 4060 7421
4056 7421
TIME...MOT...LOC 0610Z 233DEG 42KT 4071 7438 4057 7423 4041 7422
$$
NJC023-130630-
/O.CON.KPHI.SV.W.0295.000000T0000Z-230813T0630Z/
Middlesex NJ-
210 AM EDT Sun Aug 13 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM EDT
FOR NORTHEASTERN MIDDLESEX COUNTY...
At 210 AM EDT, severe thunderstorms were located along a line
extending from Summit to Carteret to Matawan, moving northeast at 50
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Perth Amboy, Edison, Sayreville, Carteret, Colonia, Woodbridge, South
Plainfield, Metuchen, Madison Park, Iselin, Sewaren, Port Reading,
Fords, Avenel and Laurence Harbor.
This includes the following highways...
New Jersey Turnpike between exits 11 and 13.
Interstate 287 in New Jersey between mile markers 0 and 4.
Garden State Parkway between mile markers 121 and 134.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4055 7425 4050 7426 4050 7428 4047 7427
4045 7423 4043 7425 4042 7433 4057 7442
4060 7447 4060 7430 4059 7428 4060 7421
4056 7421
TIME...MOT...LOC 0610Z 233DEG 42KT 4071 7438 4057 7423 4041 7422
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM099
WWUS51 KPHI 130614
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
214 AM EDT Sun Aug 13 2023
NJC023-130624-
/O.CAN.KPHI.SV.W.0295.000000T0000Z-230813T0630Z/
Middlesex NJ-
214 AM EDT Sun Aug 13 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIDDLESEX COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.
LAT...LON 4055 7425 4050 7426 4050 7428 4047 7427
4045 7423 4043 7425 4042 7433 4057 7442
4060 7447 4060 7430 4059 7428 4060 7421
4056 7421
TIME...MOT...LOC 0614Z 226DEG 44KT 4075 7433 4061 7418 4045 7417
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 9:22 PM EDT | Special Weather Statement | PHI | Sussex | 53 min |
| Aug 13, 1:10 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 50 min |
| Aug 13, 1:25 AM EDT | Tornado Warning | PHI | Hunterdon, Middlesex, Somerset | 35 min |
| Aug 13, 1:49 AM EDT | Tornado Warning | PHI | Morris, Somerset | 26 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.