Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 318, NWS Philadelphia/Mount Holly

November 13, 20215 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 13, 2021, 12:22 PM EST for 5 counties in New Jersey. It was in force for 53 min. 14 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: Nov 13, 2021, 12:22 PM EST (17:22 UTC)
Expired: Nov 13, 2021, 1:15 PM EST
In force: 53 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 106 km from the middle of the area, began a volume at 17:24 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
Nov 13, 12:34 PM EST	HAIL 0.25	Hackettstown, NJ	COVERING THE GROUND.
Nov 13, 12:38 PM EST	HAIL 0.25	Glen Gardner, NJ
Nov 13, 12:47 PM EST	HAIL 0.25	2 Ene Schooleys Mountai, NJ
Nov 13, 12:47 PM EST	HAIL 1	Ledgewood, NJ	MOSTLY DIME SIZE WITH SOME UP TO QUARTER SIZE.
Nov 13, 12:50 PM EST	HAIL 0.25	Byram, NJ
Nov 13, 12:55 PM EST	HAIL 0.25	Lake Hopatcong, NJ
Nov 13, 1:00 PM EST	HAIL 0.7	Wharton, NJ
Nov 13, 1:01 PM EST	HAIL 0.25	Rockaway, NJ
Nov 13, 1:03 PM EST	HAIL 0.25	Jefferson Twp, NJ	PARTIALLY COVERING GROUND.
Nov 13, 1:05 PM EST	HAIL 0.7	1 Sw Marcella, NJ	MPING REPORT.
Nov 13, 1:13 PM EST	HAIL 1	2 Nne Boonton Twp, NJ	MPING REPORT.
Nov 13, 1:17 PM EST	HAIL 0.25	Rockaway, NJ	SMALL HAIL COVERING THE GROUND WITH HAIL ACCUMULATIONS OF ONE QUARTER TO ONE HALF INCH.
Nov 13, 1:19 PM EST	HAIL 1	Butler, NJ
Nov 13, 1:22 PM EST	HAIL 0.75	Butler, NJ

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 12:00Z, 5.4 hours before the alert went out and 142 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: 1435 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

256 
WUUS51 KPHI 131722
SVRPHI
NJC019-027-035-037-041-131815-
/O.NEW.KPHI.SV.W.0318.211113T1722Z-211113T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1222 PM EST Sat Nov 13 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Hunterdon County in northwestern New Jersey...
  Morris County in northern New Jersey...
  Southeastern Sussex County in northwestern New Jersey...
  Southeastern Warren County in northwestern New Jersey...
  Northwestern Somerset County in northern New Jersey...

* Until 115 PM EST.

* At 1221 PM EST, a severe thunderstorm was located over High Bridge,
  or 15 miles east of Easton, moving northeast 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...
  Morristown, Newton, Dover, Madison, Hopatcong, East Hanover,
  Lincoln Park, Kinnelon, Hackettstown, Boonton, Butler, Wharton,
  Washington, Rockaway, Morris Plains, Mount Arlington, Franklin,
  Mendham, Mountain Lakes and High Bridge.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 8 and 27.
 Interstate 80 in New Jersey between mile markers 16 and 49.
 Interstate 287 in New Jersey between mile markers 29 and 54.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4090 7427 4091 7434 4086 7432 4082 7434
      4055 7490 4058 7503 4068 7507 4077 7504
      4109 7473 4109 7450 4104 7450 4105 7445
      4102 7443 4103 7442 4100 7430
TIME...MOT...LOC 1721Z 218DEG 38KT 4067 7493 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BAH

5 follow-up statements

270 
WWUS51 KPHI 131744
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1244 PM EST Sat Nov 13 2021

NJC019-027-035-037-041-131815-
/O.CON.KPHI.SV.W.0318.000000T0000Z-211113T1815Z/
Hunterdon NJ-Morris NJ-Sussex NJ-Warren NJ-Somerset NJ-
1244 PM EST Sat Nov 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EST
FOR NORTHEASTERN HUNTERDON...MORRIS...SOUTHEASTERN SUSSEX...EAST
CENTRAL WARREN AND NORTHWESTERN SOMERSET COUNTIES...

At 1244 PM EST, a severe thunderstorm was located over Budd Lake, or
13 miles south of Newton, moving northeast 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...
Morristown, Newton, Dover, Madison, Hopatcong, East Hanover, Lincoln
Park, Kinnelon, Hackettstown, Boonton, Butler, Wharton, Rockaway,
Morris Plains, Mount Arlington, Franklin, Mendham, Mountain Lakes,
High Bridge and Stanhope.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 14 and 27.
 Interstate 80 in New Jersey between mile markers 19 and 49.
 Interstate 287 in New Jersey between mile markers 30 and 54.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4090 7427 4091 7434 4086 7432 4082 7434
      4059 7483 4061 7497 4072 7497 4089 7486
      4109 7473 4109 7450 4104 7450 4105 7445
      4102 7443 4103 7442 4100 7430
TIME...MOT...LOC 1744Z 218DEG 38KT 4087 7473 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BAH

218 
WWUS51 KPHI 131756
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1256 PM EST Sat Nov 13 2021

NJC041-131806-
/O.CAN.KPHI.SV.W.0318.000000T0000Z-211113T1815Z/
Warren NJ-
1256 PM EST Sat Nov 13 2021

...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.

A Severe Thunderstorm Watch remains in effect until 700 PM EST for
northern and northwestern New Jersey.

LAT...LON 4090 7427 4091 7434 4086 7432 4082 7434
      4064 7472 4063 7481 4066 7488 4073 7486
      4088 7478 4109 7465 4109 7450 4104 7450
      4105 7445 4102 7443 4103 7442 4100 7430
TIME...MOT...LOC 1756Z 218DEG 38KT 4097 7462 

$$

NJC019-027-035-037-131815-
/O.CON.KPHI.SV.W.0318.000000T0000Z-211113T1815Z/
Hunterdon NJ-Morris NJ-Sussex NJ-Somerset NJ-
1256 PM EST Sat Nov 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EST
FOR NORTHEASTERN HUNTERDON...MORRIS...SOUTHEASTERN SUSSEX AND
NORTHWESTERN SOMERSET COUNTIES...

At 1256 PM EST, a severe thunderstorm was located over Hopatcong, or
8 miles southeast of Newton, moving northeast at 45 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, East Hanover, Lincoln Park,
Kinnelon, Boonton, Butler, Wharton, Rockaway, Morris Plains, Mount
Arlington, Franklin, Mendham, Mountain Lakes, High Bridge, Stanhope,
Riverdale and Netcong.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 21 and 27.
 Interstate 80 in New Jersey between mile markers 24 and 49.
 Interstate 287 in New Jersey between mile markers 30 and 54.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4090 7427 4091 7434 4086 7432 4082 7434
      4064 7472 4063 7481 4066 7488 4073 7486
      4088 7478 4109 7465 4109 7450 4104 7450
      4105 7445 4102 7443 4103 7442 4100 7430
TIME...MOT...LOC 1756Z 218DEG 38KT 4097 7462 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BAH

747 
WWUS51 KPHI 131802
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
102 PM EST Sat Nov 13 2021

NJC019-035-131811-
/O.CAN.KPHI.SV.W.0318.000000T0000Z-211113T1815Z/
Hunterdon NJ-Somerset NJ-
102 PM EST Sat Nov 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HUNTERDON AND
NORTHWESTERN SOMERSET COUNTIES 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 700 PM EST for
northern and northwestern New Jersey.

LAT...LON 4090 7427 4091 7434 4086 7432 4082 7434
      4075 7462 4075 7476 4082 7481 4088 7478
      4109 7465 4109 7450 4104 7450 4105 7445
      4102 7443 4103 7442 4100 7430
TIME...MOT...LOC 1801Z 218DEG 38KT 4102 7457 

$$

NJC027-037-131815-
/O.CON.KPHI.SV.W.0318.000000T0000Z-211113T1815Z/
Morris NJ-Sussex NJ-
102 PM EST Sat Nov 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EST
FOR MORRIS AND SOUTHEASTERN SUSSEX COUNTIES...

At 101 PM EST, a severe thunderstorm was located near Ogdensburg, or
9 miles east of Newton, moving northeast at 45 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, Hopatcong, East Hanover, Lincoln Park, Kinnelon,
Boonton, Butler, Wharton, Rockaway, Morris Plains, Mount Arlington,
Franklin, Mendham, Mountain Lakes, Stanhope, Riverdale, Netcong,
Ogdensburg and Chester.

This includes the following highways...
 Interstate 80 in New Jersey between mile markers 24 and 49.
 Interstate 287 in New Jersey between mile markers 36 and 54.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4090 7427 4091 7434 4086 7432 4082 7434
      4075 7462 4075 7476 4082 7481 4088 7478
      4109 7465 4109 7450 4104 7450 4105 7445
      4102 7443 4103 7442 4100 7430
TIME...MOT...LOC 1801Z 218DEG 38KT 4102 7457 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BAH

727 
WWUS51 KPHI 131806
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
106 PM EST Sat Nov 13 2021

NJC027-037-131815-
/O.CON.KPHI.SV.W.0318.000000T0000Z-211113T1815Z/
Morris NJ-Sussex NJ-
106 PM EST Sat Nov 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EST
FOR CENTRAL MORRIS AND SOUTHEASTERN SUSSEX COUNTIES...

At 105 PM EST, a severe thunderstorm was located near Ogdensburg, or
7 miles southwest of West Milford, moving northeast at 45 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...
Dover, Hopatcong, Kinnelon, Boonton, Butler, Wharton, Rockaway,
Morris Plains, Mount Arlington, Franklin, Mountain Lakes, Stanhope,
Riverdale, Netcong, Ogdensburg, Victory Gardens, Succasunna,
Succasunna-Kenvil, Lake Telemark and Green Pond.

This includes the following highways...
 Interstate 80 in New Jersey between mile markers 27 and 42.
 Interstate 287 in New Jersey between mile markers 44 and 45, and
near mile marker 54.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4081 7449 4079 7463 4088 7471 4099 7465
      4109 7460 4109 7450 4104 7450 4105 7445
      4102 7443 4103 7442 4100 7430
TIME...MOT...LOC 1805Z 218DEG 38KT 4106 7453 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BAH

406 
WWUS51 KPHI 131813
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
113 PM EST Sat Nov 13 2021

NJC027-037-131823-
/O.EXP.KPHI.SV.W.0318.000000T0000Z-211113T1815Z/
Morris NJ-Sussex NJ-
113 PM EST Sat Nov 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MORRIS AND
SOUTHEASTERN SUSSEX COUNTIES WILL EXPIRE AT 115 PM EST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 700 PM EST for
northern and northwestern New Jersey.

LAT...LON 4081 7449 4079 7463 4088 7471 4099 7465
      4109 7460 4109 7450 4104 7450 4105 7445
      4102 7443 4103 7442 4100 7430
TIME...MOT...LOC 1813Z 218DEG 38KT 4111 7448 

$$

BAH

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 13, 2:55 AM EST	Wind Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more	14 hr
Nov 13, 1:15 PM EST	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Somerset	13 min
Nov 13, 1:51 PM EST	Severe Thunderstorm Warning	PHI	Middlesex	9 min
Nov 13, 2:04 PM EST	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	41 min
Nov 13, 2:06 PM EST	Special Marine Warning	PHI		54 min
Nov 13, 2:21 PM EST	Severe Thunderstorm Warning	PHI	Ocean	24 min
Nov 13, 2:22 PM EST	Special Marine Warning	PHI		53 min
Nov 13, 2:57 PM EST	Special Marine Warning	PHI		20 min
Nov 13, 6:59 PM EST	Small Craft Advisory	PHI		11 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.