Alert archive / New Jersey / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 23, NWS Philadelphia/Mount Holly

March 16, 2026Morris County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Mar 16, 2026, 11:55 PM EDT for Morris County, Somerset County, New Jersey. It was in force for 25 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: Mar 16, 2026, 11:55 PM EDT (03:55 UTC)
Expired: Mar 17, 2026, 12:20 AM EDT
In force: 25 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Morris County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 100 km from the middle of the area, began a volume at 03:58 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
Mar 16, 11:59 PM EDT	TSTM WND DMG	Dover, NJ	Trees and wires down around Dover. 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, 3.9 hours before the alert went out and 128 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 490 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 605 m²/s²
0-3 km storm-relative helicity: 610 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

453 
WUUS51 KPHI 170355
SVRPHI
NJC027-035-170445-
/O.NEW.KPHI.SV.W.0023.260317T0355Z-260317T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1155 PM EDT Mon Mar 16 2026

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Morris County in northern New Jersey...
  Northeastern Somerset County in northern New Jersey...

* Until 1245 AM EDT.

* At 1155 PM EDT, a severe thunderstorm was located near Mendham, or
  near Morristown, 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...
  Morristown, Dover, Madison, Florham Park, East Hanover, Lincoln
  Park, Kinnelon, Chatham, Boonton, Butler, Wharton, Rockaway, Morris
  Plains, Mount Arlington, Mendham, Mountain Lakes, Riverdale,
  Victory Gardens, Millington, and Succasunna.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.

&&

LAT...LON 4090 7427 4091 7433 4088 7434 4086 7432
      4076 7438 4075 7436 4067 7446 4066 7445
      4066 7440 4060 7445 4087 7471 4104 7443
      4102 7443 4100 7430 4097 7428 4092 7429
TIME...MOT...LOC 0355Z 233DEG 43KT 4083 7458 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hoeflich

2 follow-up statements

046 
WWUS51 KPHI 170408 RRA
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1208 AM EDT Tue Mar 17 2026

NJC035-170418-
/O.CAN.KPHI.SV.W.0023.000000T0000Z-260317T0445Z/
Somerset NJ-
1208 AM EDT Tue Mar 17 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN 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 4073 7438 4095 7455 4103 7443 4102 7443
      4100 7430 4097 7428 4092 7429 4090 7427
      4091 7433 4088 7434 4086 7432 4085 7433
      4084 7433 4076 7438 4075 7436
TIME...MOT...LOC 0408Z 233DEG 43KT 4093 7441 

$$

NJC027-170445-
/O.CON.KPHI.SV.W.0023.000000T0000Z-260317T0445Z/
Morris NJ-
1208 AM EDT Tue Mar 17 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM EDT
FOR NORTHEASTERN MORRIS COUNTY...

At 1208 AM EDT, a severe thunderstorm was located over Boonton, or 8
miles southwest of Pompton Lakes, 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...
Madison, Florham Park, East Hanover, Lincoln Park, Kinnelon, Chatham,
Boonton, Butler, Rockaway, Morris Plains, Mountain Lakes, Riverdale,
Parsippany, Pequannock Township, Lake Telemark, White Meadow Lake,
and Hanover Township.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.

&&

LAT...LON 4073 7438 4095 7455 4103 7443 4102 7443
      4100 7430 4097 7428 4092 7429 4090 7427
      4091 7433 4088 7434 4086 7432 4085 7433
      4084 7433 4076 7438 4075 7436
TIME...MOT...LOC 0408Z 233DEG 43KT 4093 7441 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hoeflich

315 
WWUS51 KPHI 170420
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1220 AM EDT Tue Mar 17 2026

NJC027-170430-
/O.CAN.KPHI.SV.W.0023.000000T0000Z-260317T0445Z/
Morris NJ-
1220 AM EDT Tue Mar 17 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MORRIS COUNTY IS
CANCELLED...

The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

LAT...LON 4073 7438 4095 7455 4103 7443 4102 7443
      4100 7430 4097 7428 4092 7429 4090 7427
      4091 7433 4088 7434 4086 7432 4085 7433
      4084 7433 4076 7438 4075 7436
TIME...MOT...LOC 0418Z 233DEG 43KT 4102 7426 

$$

Hoeflich

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 16, 10:03 PM EDT	Special Marine Warning	PHI		117 min
Mar 16, 10:18 PM EDT	Severe Thunderstorm Warning	PHI	Warren	57 min
Mar 16, 10:36 PM EDT	Special Marine Warning	PHI		86 min
Mar 16, 10:39 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	51 min
Mar 16, 10:50 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Atlantic, Cape May, Cumberland, Salem	55 min
Mar 16, 10:58 PM EDT	Special Marine Warning	PHI		2 hr
Mar 16, 11:16 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	59 min
Mar 16, 11:19 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Mercer, Monmouth and 1 more	41 min
Mar 16, 11:30 PM EDT	Special Marine Warning	PHI		2 hr
Mar 16, 11:37 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Ocean	38 min
Mar 16, 11:49 PM EDT	Tornado Warning	PHI	Burlington, Monmouth, Ocean	26 min
Mar 16, 11:51 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	43 min
Mar 17, 5:48 AM EDT	Small Craft Advisory	PHI		31 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2026 Every 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.