Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 1, 2023, 6:31 PM EDT for 5 counties in New Jersey. It was in force for 44 min. 1 report 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
- Apr 1, 2023, 6:31 PM EDT (22:31 UTC)
- Expired
- Apr 1, 2023, 7:15 PM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 74 km from the middle of the area, began a volume at 22:32 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 |
|---|---|---|---|
| Apr 1, 7:06 PM EDT | TSTM WND DMG | South Brunswick Twp, NJ | LARGE TREES DOWNED BLOCKING MAJOR ROAD. TIME ESTIMATED VIA RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 1, 5:30 PM EDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.5 hours before the alert went out and 141 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2079 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 321 m²/s²
- 0-3 km storm-relative helicity
- 332 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
508
WUUS51 KPHI 012231
SVRPHI
NJC019-021-023-027-035-012315-
/O.NEW.KPHI.SV.W.0010.230401T2231Z-230401T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
631 PM EDT Sat Apr 1 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Hunterdon County in northwestern New Jersey...
Southern Morris County in northern New Jersey...
Northern Mercer County in central New Jersey...
Somerset County in northern New Jersey...
Middlesex County in northern New Jersey...
* Until 715 PM EDT.
* At 631 PM EDT, severe thunderstorms were located along a line
extending from Chester to Tinicum, moving east at 45 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, Perth Amboy, Morristown, Somerville, Somerset,
Edison, East Brunswick, Bridgewater, South Brunswick, Sayreville,
North Brunswick, Carteret, Dover, Madison, Middlesex, Princeton,
Florham Park, East Hanover, Bound Brook and Manville.
This includes the following highways...
New Jersey Turnpike between exits 9 and 13.
Interstate 78 in New Jersey between mile markers 16 and 41.
Interstate 80 in New Jersey near mile marker 34, and between mile
markers 38 and 48.
Interstate 287 in New Jersey between mile markers 0 and 44.
Garden State Parkway between mile markers 125 and 134.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM EDT for central,
northern and northwestern New Jersey...and southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 1000 PM EDT for central,
northern and northwestern New Jersey...and southeastern Pennsylvania.
&&
LAT...LON 4056 7421 4055 7425 4050 7426 4029 7454
4037 7495 4040 7497 4042 7506 4052 7507
4091 7458 4090 7434 4083 7433 4076 7438
4075 7436 4067 7446 4066 7445 4065 7440
4060 7446 4060 7421
TIME...MOT...LOC 2231Z 277DEG 40KT 4079 7466 4046 7509
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann1 follow-up statement
380
WWUS51 KPHI 012253
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
653 PM EDT Sat Apr 1 2023
NJC019-021-023-027-035-012315-
/O.CON.KPHI.SV.W.0010.000000T0000Z-230401T2315Z/
Hunterdon NJ-Morris NJ-Mercer NJ-Somerset NJ-Middlesex NJ-
653 PM EDT Sat Apr 1 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHEASTERN HUNTERDON...SOUTHEASTERN MORRIS...NORTHERN MERCER...
SOMERSET AND MIDDLESEX COUNTIES...
At 652 PM EDT, severe thunderstorms were located along a line
extending from Millburn to Hopewell, moving east at 45 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
New Brunswick, Perth Amboy, Morristown, Somerville, Somerset, Edison,
East Brunswick, Bridgewater, South Brunswick, Sayreville, North
Brunswick, Carteret, Madison, Middlesex, Princeton, Florham Park,
East Hanover, Bound Brook, Manville and Chatham.
This includes the following highways...
New Jersey Turnpike between exits 9 and 13.
Interstate 78 in New Jersey between mile markers 29 and 41.
Interstate 80 in New Jersey between mile markers 41 and 48.
Interstate 287 in New Jersey between mile markers 0 and 44.
Garden State Parkway between mile markers 125 and 134.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM EDT for central,
northern and northwestern New Jersey...and southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4038 7496 4090 7444 4090 7434 4083 7433
4076 7438 4075 7436 4067 7446 4066 7445
4065 7440 4060 7446 4060 7421 4056 7421
4055 7425 4050 7426 4029 7454 4037 7495
TIME...MOT...LOC 2252Z 276DEG 40KT 4076 7435 4041 7475
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 5:53 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Warren | 67 min |
| Apr 1, 6:18 PM EDT | Special Marine Warning | PHI | 87 min | |
| Apr 1, 6:18 PM EDT | Special Weather Statement | PHI | Morris | 42 min |
| Apr 1, 6:37 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth | 53 min |
| Apr 1, 6:39 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Gloucester, Salem | 51 min |
| Apr 1, 6:45 PM EDT | Tornado Warning | PHI | Burlington, Mercer | 30 min |
| Apr 1, 6:57 PM EDT | Tornado Warning | PHI | Burlington, Camden | 33 min |
| Apr 1, 7:05 PM EDT | Special Marine Warning | PHI | 55 min | |
| Apr 1, 7:07 PM EDT | Tornado Warning | PHI | Burlington, Mercer, Monmouth, Ocean | 38 min |
| Apr 1, 7:11 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Mercer, Middlesex and 2 more | 64 min |
| Apr 1, 7:24 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland, Gloucester, Salem | 51 min |
| Apr 1, 7:26 PM EDT | Special Marine Warning | PHI | 64 min | |
| Apr 1, 7:27 PM EDT | Special Marine Warning | PHI | 93 min | |
| Apr 1, 7:31 PM EDT | Tornado Warning | PHI | Monmouth, Ocean | 29 min |
| Apr 1, 7:33 PM EDT | Tornado Warning | PHI | Burlington, Ocean | 27 min |
| Apr 1, 7:47 PM EDT | Special Marine Warning | PHI | 88 min | |
| Apr 1, 7:52 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Cape May, Cumberland, Ocean | 38 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.