Alert archive / New Jersey / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 68, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 11, 2026, 9:28 PM EDT for Morris County, Somerset County, New Jersey. It was in force for 27 min. 2 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 11, 2026, 9:28 PM EDT (01:28 UTC)
- Expired
- Jun 11, 2026, 9:55 PM EDT
- In force
- 27 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
The radar
The Philadelphia radar (KDIX), 95 km from the middle of the area, began a volume at 01:29 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 11, 9:34 PM EDT | TSTM WND DMG | Mendham, NJ | Reports of numerous trees and wires down across the town of Mendham. |
| Jun 11, 9:49 PM EDT | TSTM WND DMG | Morristown, NJ | Several reports of trees and wires down in Morristown. Time estimated from 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 |
|---|---|---|---|
| Jun 11, 7:14 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 1.5 hours before the alert went out and 133 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
- 783 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 1469 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted.
737
WUUS51 KPHI 120128
SVRPHI
NJC027-035-120215-
/O.NEW.KPHI.SV.W.0068.260612T0128Z-260612T0215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
928 PM EDT Thu Jun 11 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Morris County in northern New Jersey...
North central Somerset County in northern New Jersey...
* Until 1015 PM EDT.
* At 928 PM EDT, a severe thunderstorm was located over Chester, or
10 miles west of Morristown, moving east at 25 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, Madison, Florham Park, East Hanover, Lincoln Park,
Chatham, Boonton, Morris Plains, Mendham, Mountain Lakes, Peapack
And Gladstone, Chester, Far Hills, Parsippany, Basking Ridge, Long
Valley, Bernardsville, and Hanover Township.
This includes the following highways...
Interstate 80 in New Jersey between mile markers 40 and 48.
Interstate 287 in New Jersey between mile markers 28 and 47.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4091 7434 4083 7433 4079 7437 4076 7438
4075 7436 4072 7439 4070 7443 4069 7472
4071 7472 4072 7474 4080 7475 4095 7428
4092 7429 4090 7427
TIME...MOT...LOC 0128Z 256DEG 23KT 4076 7467
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich2 follow-up statements
817
WWUS51 KPHI 120146
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
946 PM EDT Thu Jun 11 2026
NJC035-120156-
/O.CAN.KPHI.SV.W.0068.000000T0000Z-260612T0215Z/
Somerset NJ-
946 PM EDT Thu Jun 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SOMERSET COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
northern New Jersey.
LAT...LON 4090 7427 4091 7434 4083 7433 4079 7437
4076 7438 4075 7436 4072 7439 4070 7443
4070 7451 4076 7456 4075 7461 4084 7464
4095 7428 4092 7429
TIME...MOT...LOC 0146Z 256DEG 23KT 4079 7452
$$
NJC027-120215-
/O.CON.KPHI.SV.W.0068.000000T0000Z-260612T0215Z/
Morris NJ-
946 PM EDT Thu Jun 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR SOUTHEASTERN MORRIS COUNTY...
At 946 PM EDT, a severe thunderstorm was located over Morristown,
moving east at 25 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, Madison, Florham Park, East Hanover, Lincoln Park,
Chatham, Boonton, Morris Plains, Mendham, Mountain Lakes, Parsippany,
and Hanover Township.
This includes the following highways...
Interstate 80 in New Jersey between mile markers 40 and 48.
Interstate 287 in New Jersey between mile markers 31 and 48.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4090 7427 4091 7434 4083 7433 4079 7437
4076 7438 4075 7436 4072 7439 4070 7443
4070 7451 4076 7456 4075 7461 4084 7464
4095 7428 4092 7429
TIME...MOT...LOC 0146Z 256DEG 23KT 4079 7452
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich337
WWUS51 KPHI 120155
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
955 PM EDT Thu Jun 11 2026
NJC027-120205-
/O.CAN.KPHI.SV.W.0068.000000T0000Z-260612T0215Z/
Morris NJ-
955 PM EDT Thu Jun 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORRIS COUNTY IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
northern New Jersey.
LAT...LON 4090 7427 4091 7434 4083 7433 4079 7437
4076 7438 4075 7436 4072 7439 4070 7443
4070 7451 4076 7456 4075 7461 4084 7464
4095 7428 4092 7429
TIME...MOT...LOC 0153Z 256DEG 23KT 4080 7445
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 9:44 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset | 16 min |
| Jun 11, 9:50 PM EDT | Special Marine Warning | PHI | 63 min | |
| Jun 11, 10:02 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 43 min |
| Jun 11, 10:18 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 27 min |
| Jun 11, 10:21 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 39 min |
| Jun 11, 10:48 PM EDT | Special Marine Warning | PHI | 55 min | |
| Jun 11, 10:56 PM EDT | Special Marine Warning | PHI | 46 min | |
| Jun 12, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Somerset | 52 min |
| Jun 12, 5:35 PM EDT | Special Marine Warning | PHI | 35 min | |
| Jun 12, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 26 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.