Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 320, NWS Philadelphia/Mount Holly

November 13, 2021Middlesex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 13, 2021, 1:51 PM EST for Middlesex County, New Jersey. It was in force for 9 min. 3 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, 1:51 PM EST (18:51 UTC)
Expired: Nov 13, 2021, 2:00 PM EST
In force: 9 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Middlesex County, NJ

The radar

The Philadelphia radar (KDIX), 68 km from the middle of the area, began a volume at 18:51 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, 1:52 PM EST	HAIL 0.25	Perth Amboy, NJ
Nov 13, 1:52 PM EST	HAIL 1.25	Hopelawn, NJ	HAIL UP TO HALF DOLLAR SIZE.
Nov 13, 1:55 PM EST	HAIL 0.25	Sayreville, NJ

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
Nov 13, 12:27 PM EST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.9 hours before the alert went out and 124 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.

131 
WUUS51 KPHI 131851
SVRPHI
NJC023-131900-
/O.NEW.KPHI.SV.W.0320.211113T1851Z-211113T1900Z/

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

The National Weather Service in Mount Holly NJ has issued a

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

* Until 200 PM EST.

* At 150 PM EST, a severe thunderstorm was located over Perth Amboy,
  moving northeast at 55 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...
  Perth Amboy, Edison, East Brunswick, Sayreville, Carteret, Colonia,
  Woodbridge, South River, Metuchen, Iselin, Sewaren, Port Reading,
  Fords and Avenel.

This includes the following highways...
 New Jersey Turnpike between exits 11 and 13.
 Interstate 287 in New Jersey between mile markers 0 and 2.
 Garden State Parkway between mile markers 124 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
      4046 7425 4046 7439 4060 7438 4061 7431
      4059 7429 4060 7421 4059 7420
TIME...MOT...LOC 1850Z 231DEG 49KT 4054 7427 

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

$$

BAH

1 follow-up statement

708 
WWUS51 KPHI 131900
SVSPHI

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

NJC023-131910-
/O.EXP.KPHI.SV.W.0320.000000T0000Z-211113T1900Z/
Middlesex NJ-
200 PM EST Sat Nov 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIDDLESEX COUNTY
HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.  However gusty
winds are still possible with this thunderstorm.

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

LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
      4046 7425 4046 7439 4060 7438 4061 7431
      4059 7429 4060 7421 4059 7420
TIME...MOT...LOC 1900Z 231DEG 49KT 4062 7414 

$$

SFJ

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, 12:22 PM EST	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	53 min
Nov 13, 1:15 PM EST	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Somerset	13 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.