Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 79, NWS Philadelphia/Mount Holly

June 14, 2021Middlesex County, Morris County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 14, 2021, 7:55 PM EDT for Middlesex County, Morris County, Somerset County, New Jersey. It was in force for 32 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: Jun 14, 2021, 7:55 PM EDT (23:55 UTC)
Expired: Jun 14, 2021, 8:27 PM EDT
In force: 32 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Middlesex County, NJ, Morris County, NJ, Somerset County, NJ

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 14, 2:06 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.9 hours before the alert went out and 136 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 687 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

443 
WUUS51 KPHI 142355
SVRPHI
NJC023-027-035-150045-
/O.NEW.KPHI.SV.W.0079.210614T2355Z-210615T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
755 PM EDT Mon Jun 14 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  South central Morris County in northern New Jersey...
  Northeastern Somerset County in northern New Jersey...
  North central Middlesex County in northern New Jersey...

* Until 845 PM EDT.

* At 754 PM EDT, a severe thunderstorm was located over Middlesex, or
  near Plainfield, moving east at 10 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...
  Middlesex, Bound Brook, Colonia, Martinsville, Millington,
  Woodbridge, South Plainfield, North Plainfield, Metuchen, Dunellen,
  Watchung, South Bound Brook, Iselin and Fords.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 34 and 43.
 Interstate 287 in New Jersey between mile markers 3 and 8, and
between mile markers 13 and 15.
 Garden State Parkway between mile markers 130 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4056 7458 4066 7460 4071 7442 4067 7446
      4066 7445 4067 7441 4065 7440 4063 7442
      4060 7446 4060 7431 4053 7430
TIME...MOT...LOC 2354Z 263DEG 9KT 4060 7451 

HAIL...1.00IN
WIND...60MPH
 
$$

Staarmann

3 follow-up statements

993 
WWUS51 KPHI 150009
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
809 PM EDT Mon Jun 14 2021

NJC027-150019-
/O.CAN.KPHI.SV.W.0079.000000T0000Z-210615T0045Z/
Morris NJ-
809 PM EDT Mon Jun 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MORRIS 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 900 PM EDT for
northern New Jersey.

LAT...LON 4055 7450 4056 7451 4065 7452 4067 7447
      4066 7445 4067 7441 4065 7440 4063 7442
      4060 7446 4060 7431 4053 7430
TIME...MOT...LOC 0009Z 265DEG 11KT 4060 7442 

$$

NJC023-035-150045-
/O.CON.KPHI.SV.W.0079.000000T0000Z-210615T0045Z/
Somerset NJ-Middlesex NJ-
809 PM EDT Mon Jun 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR EAST CENTRAL SOMERSET AND NORTH CENTRAL MIDDLESEX COUNTIES...

At 809 PM EDT, a severe thunderstorm was located over Plainfield,
moving east at 10 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...
Middlesex, Colonia, Society Hill, Woodbridge, South Plainfield, North
Plainfield, Metuchen, Dunellen, Watchung, Iselin and Fords.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 38 and 43.
 Interstate 287 in New Jersey between mile markers 3 and 9.
 Garden State Parkway between mile markers 130 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4055 7450 4056 7451 4065 7452 4067 7447
      4066 7445 4067 7441 4065 7440 4063 7442
      4060 7446 4060 7431 4053 7430
TIME...MOT...LOC 0009Z 265DEG 11KT 4060 7442 

HAIL...1.00IN
WIND...60MPH
 
$$

Staarmann

380 
WWUS51 KPHI 150018
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
818 PM EDT Mon Jun 14 2021

NJC035-150028-
/O.CAN.KPHI.SV.W.0079.000000T0000Z-210615T0045Z/
Somerset NJ-
818 PM EDT Mon Jun 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST 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 900 PM EDT for
northern New Jersey.

LAT...LON 4059 7445 4060 7445 4060 7431 4055 7430
      4053 7430
TIME...MOT...LOC 0018Z 267DEG 9KT 4059 7438 

$$

NJC023-150045-
/O.CON.KPHI.SV.W.0079.000000T0000Z-210615T0045Z/
Middlesex NJ-
818 PM EDT Mon Jun 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR NORTH CENTRAL MIDDLESEX COUNTY...

At 818 PM EDT, a severe thunderstorm was located over Plainfield,
moving east at 10 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...
Colonia, Woodbridge, South Plainfield, Metuchen, Iselin and Fords. 

This includes the following highways...
 New Jersey Turnpike near exit 12.
 Garden State Parkway between mile markers 129 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4059 7445 4060 7445 4060 7431 4055 7430
      4053 7430
TIME...MOT...LOC 0018Z 267DEG 9KT 4059 7438 

HAIL...1.00IN
WIND...60MPH
 
$$

Staarmann

198 
WWUS51 KPHI 150027
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
827 PM EDT Mon Jun 14 2021

NJC023-150036-
/O.CAN.KPHI.SV.W.0079.000000T0000Z-210615T0045Z/
Middlesex NJ-
827 PM EDT Mon Jun 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL MIDDLESEX COUNTY
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 gusty winds and
heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern New Jersey.

LAT...LON 4059 7445 4060 7445 4060 7431 4055 7430
      4053 7430
TIME...MOT...LOC 0024Z 263DEG 9KT 4059 7435 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 5:53 PM EDT	Special Weather Statement	PHI	Sussex	37 min
Jun 14, 6:24 PM EDT	Special Weather Statement	PHI	Sussex	36 min
Jun 14, 6:33 PM EDT	Special Weather Statement	PHI	Middlesex, Monmouth	27 min
Jun 14, 6:48 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Somerset, Sussex	42 min
Jun 14, 7:02 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth	43 min
Jun 14, 7:14 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	2 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2021 Every severe thunderstorm warning in 2021

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.