Alert archive / New Jersey / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 173, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 15, 2026, 4:35 PM EDT for 4 counties in New Jersey. It was in force for 25 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 15, 2026, 4:35 PM EDT (20:35 UTC)
- Expired
- Jul 15, 2026, 5:00 PM EDT
- In force
- 25 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ
The radar
The Philadelphia radar (KDIX), 89 km from the middle of the area, began a volume at 20:38 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 nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.6 hours before the alert went out and 135 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
- 915 J/kg
- Mixed-layer CIN
- -362 J/kg
- Mixed-layer LCL
- 1305 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 117 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
454
WUUS51 KPHI 152035
SVRPHI
NJC027-035-037-041-152100-
/O.NEW.KPHI.SV.W.0173.260715T2035Z-260715T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
435 PM EDT Wed Jul 15 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Morris County in northern New Jersey...
South central Sussex County in northwestern New Jersey...
East central Warren County in northwestern New Jersey...
Northeastern Somerset County in northern New Jersey...
* Until 500 PM EDT.
* At 435 PM EDT, a severe thunderstorm was located over Stanhope, or
9 miles southeast of Newton, moving southeast at 35 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...
Morristown, Dover, Madison, Hopatcong, Florham Park, Chatham,
Wharton, Rockaway, Morris Plains, Mount Arlington, Mendham,
Stanhope, Netcong, Chester, Victory Gardens, Andover, Lake Mohawk,
Millington, Succasunna, and Succasunna-Kenvil.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 39 and 43.
Interstate 80 in New Jersey between mile markers 20 and 37.
Interstate 287 in New Jersey between mile markers 28 and 40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4074 7437 4067 7446 4066 7445 4067 7443
4066 7440 4063 7441 4060 7445 4093 7484
4105 7468 4079 7437 4076 7438 4075 7436
TIME...MOT...LOC 2035Z 310DEG 31KT 4093 7468
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Cooper1 follow-up statement
844
WWUS51 KPHI 152045
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
445 PM EDT Wed Jul 15 2026
NJC041-152055-
/O.CAN.KPHI.SV.W.0173.000000T0000Z-260715T2100Z/
Warren NJ-
445 PM EDT Wed Jul 15 2026
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WARREN COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4074 7437 4067 7446 4066 7445 4067 7443
4066 7440 4063 7441 4060 7445 4089 7479
4098 7461 4079 7437 4076 7438 4075 7436
TIME...MOT...LOC 2045Z 310DEG 31KT 4087 7459
$$
NJC027-035-037-152100-
/O.CON.KPHI.SV.W.0173.000000T0000Z-260715T2100Z/
Morris NJ-Sussex NJ-Somerset NJ-
445 PM EDT Wed Jul 15 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR CENTRAL MORRIS...SOUTH CENTRAL SUSSEX AND NORTHEASTERN SOMERSET
COUNTIES...
At 445 PM EDT, a severe thunderstorm was located over Dover, or 7
miles northwest of Morristown, moving southeast at 35 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...
Morristown, Dover, Madison, Hopatcong, Florham Park, Chatham,
Wharton, Rockaway, Morris Plains, Mount Arlington, Mendham, Stanhope,
Netcong, Chester, Victory Gardens, Millington, Succasunna,
Succasunna-Kenvil, Budd Lake, and Basking Ridge.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 39 and 43.
Interstate 80 in New Jersey between mile markers 25 and 36.
Interstate 287 in New Jersey between mile markers 28 and 40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4074 7437 4067 7446 4066 7445 4067 7443
4066 7440 4063 7441 4060 7445 4089 7479
4098 7461 4079 7437 4076 7438 4075 7436
TIME...MOT...LOC 2045Z 310DEG 31KT 4087 7459
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CooperThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 4:24 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 36 min |
| Jul 15, 4:44 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 30 min |
| Jul 15, 4:59 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset | 31 min |
| Jul 15, 5:27 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 33 min |
| Jul 15, 5:51 PM EDT | Special Marine Warning | PHI | 54 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2026Every severe thunderstorm warning in 2026
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.