Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 79, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 17, 2023, 4:19 PM EDT for Middlesex County, Monmouth County, Somerset County, New Jersey. It was in force for 22 min. 8 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
- Jun 17, 2023, 4:19 PM EDT (20:19 UTC)
- Expired
- Jun 17, 2023, 4:41 PM EDT
- In force
- 22 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Middlesex County, NJ, Monmouth County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 43 km from the middle of the area, began a volume at 20:19 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 |
|---|---|---|---|
| Jun 17, 4:25 PM EDT | TSTM WND DMG | South Brunswick, NJ | Several reports of tree branches down across South Brunswick including Rt 1 and Davidson Mill Road. Time estimated from radar. |
| Jun 17, 4:25 PM EDT | TSTM WND DMG | South Brunswick, NJ | Several reports of tree branches down across South Brunswick including Rt 1 and Davidson Mill Road. Time estimated from radar. |
| Jun 17, 4:25 PM EDT | TSTM WND DMG | South Brunswick, NJ | Several reports of tree branches down across South Brunswick including Rt 1 and Davidson Mill Road. Time estimated from radar. |
| Jun 17, 4:35 PM EDT | HAIL 0.25 | 1 S Helmetta, NJ | |
| Jun 17, 4:35 PM EDT | HAIL 0.25 | 1 S Helmetta, NJ | |
| Jun 17, 4:35 PM EDT | HAIL 0.25 | 1 S Helmetta, NJ | |
| Jun 17, 4:35 PM EDT | HAIL 0.25 | 1 S Helmetta, NJ | |
| Jun 17, 4:35 PM EDT | HAIL 0.25 | 1 S Helmetta, NJ |
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, 8.3 hours before the alert went out and 152 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
- 20 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 658 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
864
WUUS51 KPHI 172019
SVRPHI
NJC023-025-035-172100-
/O.NEW.KPHI.SV.W.0079.230617T2019Z-230617T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
419 PM EDT Sat Jun 17 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Somerset County in northern New Jersey...
Central Monmouth County in central New Jersey...
Southern Middlesex County in northern New Jersey...
* Until 500 PM EDT.
* At 419 PM EDT, a severe thunderstorm was located over Kendall Park,
or 8 miles southwest of New Brunswick, moving southeast at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
New Brunswick, Somerset, Old Bridge, East Brunswick, South
Brunswick, North Brunswick, Marlboro, Manalapan, Jamesburg,
Cranbury, Roosevelt, Rocky Hill, Princeton Meadows, Kingston,
Dayton, Robertsville, North Brunswick Township, Clearbrook Park,
Yorketown and Whittingham.
This includes New Jersey Turnpike near exit 9.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to hail and damaging winds, frequent cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 4018 7442 4024 7449 4027 7448 4029 7454
4037 7462 4038 7462 4039 7465 4043 7469
4052 7454 4034 7419
TIME...MOT...LOC 2019Z 317DEG 26KT 4042 7459
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse2 follow-up statements
542
WWUS51 KPHI 172029
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
429 PM EDT Sat Jun 17 2023
NJC035-172038-
/O.CAN.KPHI.SV.W.0079.000000T0000Z-230617T2100Z/
Somerset NJ-
429 PM EDT Sat Jun 17 2023
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SOMERSET COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4018 7442 4024 7449 4027 7448 4029 7454
4037 7462 4039 7460 4046 7442 4034 7419
TIME...MOT...LOC 2028Z 316DEG 27KT 4036 7451
$$
NJC023-025-172100-
/O.CON.KPHI.SV.W.0079.000000T0000Z-230617T2100Z/
Monmouth NJ-Middlesex NJ-
429 PM EDT Sat Jun 17 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR CENTRAL MONMOUTH AND SOUTHERN MIDDLESEX COUNTIES...
At 428 PM EDT, a severe thunderstorm was located over Dayton, or 9
miles south of New Brunswick, moving southeast at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Old Bridge, East Brunswick, South Brunswick, Marlboro, Manalapan,
Jamesburg, Cranbury, Roosevelt, Princeton Meadows, Kingston, Dayton,
Robertsville, Clearbrook Park, Yorketown, Whittingham, Morganville,
Brownville, Twin Rivers, Kendall Park and North Brunswick Township.
This includes New Jersey Turnpike near exit 9.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4018 7442 4024 7449 4027 7448 4029 7454
4037 7462 4039 7460 4046 7442 4034 7419
TIME...MOT...LOC 2028Z 316DEG 27KT 4036 7451
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse546
WWUS51 KPHI 172041
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
441 PM EDT Sat Jun 17 2023
NJC023-025-172051-
/O.CAN.KPHI.SV.W.0079.000000T0000Z-230617T2100Z/
Monmouth NJ-Middlesex NJ-
441 PM EDT Sat Jun 17 2023
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MONMOUTH AND SOUTHERN
MIDDLESEX COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However small hail and
gusty winds are still possible with this thunderstorm.
LAT...LON 4018 7442 4024 7449 4027 7448 4029 7454
4037 7462 4039 7460 4046 7442 4034 7419
TIME...MOT...LOC 2039Z 317DEG 26KT 4029 7442
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 3:40 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Somerset, Warren | 31 min |
| Jun 17, 4:55 PM EDT | Special Marine Warning | PHI | 50 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.