Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 46, NWS Philadelphia/Mount Holly

June 3, 20214 counties in New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 3, 2021, 8:44 PM EDT for 4 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 30 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 3, 2021, 8:44 PM EDT (00:44 UTC)
Expired: Jun 3, 2021, 9:14 PM EDT
In force: 30 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Burlington County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 38 km from the middle of the area, began a volume at 00:43 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.

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 3, 2:48 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.7 hours before the alert went out and 155 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: 163 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 491 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

090 
WUUS51 KPHI 040044
SVRPHI
NJC005-021-023-025-PAC017-040130-
/O.NEW.KPHI.SV.W.0046.210604T0044Z-210604T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
844 PM EDT Thu Jun 3 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Eastern Mercer County in central New Jersey...
  North central Burlington County in southern New Jersey...
  Southwestern Monmouth County in central New Jersey...
  Southern Middlesex County in northern New Jersey...
  Eastern Bucks County in southeastern Pennsylvania...

* Until 930 PM EDT.

* At 843 PM EDT, a severe thunderstorm was located over Hightstown,
  or 12 miles east of Trenton, moving east at 40 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...
  Trenton, Old Bridge, East Brunswick, South Brunswick, Sayreville,
  Manalapan, Princeton, Florence, Jamesburg, Hightstown, Bordentown,
  Cranbury, Allentown, Roosevelt, Florence-Roebling, Brownville, West
  Freehold, Adelphia, Clarksburg and White Horse.

This includes the following highways...
 New Jersey Turnpike between exits 6 and 9.
 Interstate 195 in New Jersey between mile markers 0 and 16.
 Interstate 295 in New Jersey between mile markers 54 and 68.
 Garden State Parkway between mile markers 124 and 125.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4017 7440 4015 7444 4009 7481 4027 7472
      4038 7464 4039 7462 4037 7461 4040 7459
      4049 7428 4016 7425
TIME...MOT...LOC 0043Z 257DEG 37KT 4026 7452 

HAIL...0.75IN
WIND...60MPH
 
$$

Davis

2 follow-up statements

726 
WWUS51 KPHI 040106
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
906 PM EDT Thu Jun 3 2021

NJC005-PAC017-040115-
/O.CAN.KPHI.SV.W.0046.000000T0000Z-210604T0130Z/
Burlington NJ-Bucks PA-
906 PM EDT Thu Jun 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BURLINGTON AND
EASTERN BUCKS COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4017 7426 4017 7440 4015 7444 4012 7458
      4014 7459 4014 7462 4015 7463 4028 7457
      4038 7448 4044 7447 4049 7429 4016 7425
TIME...MOT...LOC 0105Z 257DEG 37KT 4031 7422 

$$

NJC021-023-025-040130-
/O.CON.KPHI.SV.W.0046.000000T0000Z-210604T0130Z/
Mercer NJ-Monmouth NJ-Middlesex NJ-
906 PM EDT Thu Jun 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR SOUTHEASTERN MERCER...SOUTHWESTERN MONMOUTH AND SOUTHEASTERN
MIDDLESEX COUNTIES...

At 905 PM EDT, a severe thunderstorm was located over Marlboro, or 12
miles west of Long Branch, moving east 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...
Old Bridge, East Brunswick, Sayreville, Manalapan, Jamesburg,
Hightstown, Cranbury, Allentown, Roosevelt, Windsor, Brownville,
Robertsville, West Freehold, Clearbrook Park, Clarksburg, Yorketown,
Twin Rivers, Whittingham, Imlaystown and Cream Ridge.

This includes the following highways...
 New Jersey Turnpike between exits 8 and 9.
 Interstate 195 in New Jersey between mile markers 7 and 16.
 Garden State Parkway near mile marker 125.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4017 7426 4017 7440 4015 7444 4012 7458
      4014 7459 4014 7462 4015 7463 4028 7457
      4038 7448 4044 7447 4049 7429 4016 7425
TIME...MOT...LOC 0105Z 257DEG 37KT 4031 7422 

HAIL...0.75IN
WIND...60MPH
 
$$

Robertson

937 
WWUS51 KPHI 040114
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
914 PM EDT Thu Jun 3 2021

NJC021-023-025-040124-
/O.CAN.KPHI.SV.W.0046.000000T0000Z-210604T0130Z/
Mercer NJ-Monmouth NJ-Middlesex NJ-
914 PM EDT Thu Jun 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MERCER...
SOUTHWESTERN MONMOUTH AND SOUTHEASTERN MIDDLESEX COUNTIES 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.

LAT...LON 4017 7426 4017 7440 4015 7444 4012 7458
      4014 7459 4014 7462 4015 7463 4028 7457
      4038 7448 4044 7447 4049 7429 4016 7425
TIME...MOT...LOC 0112Z 257DEG 37KT 4033 7410 

$$

Davis

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 8:14 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Ocean	19 min
Jun 3, 8:55 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	10 min
Jun 4, 1:07 PM EDT	Special Weather Statement	PHI	Sussex	38 min
Jun 4, 1:45 PM EDT	Areal Flood Advisory	PHI	Warren	97 min
Jun 4, 1:49 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	41 min
Jun 4, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	62 min
Jun 4, 2:49 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	70 min
Jun 4, 3:16 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Hunterdon, Mercer, Middlesex, Monmouth and 1 more	98 min
Jun 4, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer	42 min
Jun 4, 3:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	67 min
Jun 4, 3:46 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer	44 min
Jun 4, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	63 min
Jun 4, 4:20 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	40 min
Jun 4, 4:22 PM EDT	Special Marine Warning	PHI		53 min
Jun 4, 4:23 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	52 min
Jun 4, 4:30 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth, Ocean	63 min
Jun 4, 5:09 PM EDT	Special Marine Warning	PHI		2 hr
Jun 4, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	18 min
Jun 4, 5:32 PM EDT	Special Marine Warning	PHI		58 min
Jun 4, 6:18 PM EDT	Special Weather Statement	PHI	Atlantic	42 min
Jun 4, 6:27 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	48 min
Jun 4, 7:13 PM EDT	Special Marine Warning	PHI		62 min
Jun 4, 1:02 PM EDT	Special Weather Statement	PHI	Lehigh	28 min
Jun 4, 1:29 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh	2 hr
Jun 4, 2:21 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	21 min
Jun 4, 2:24 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	51 min
Jun 4, 2:27 PM EDT	Severe Thunderstorm Warning	PHI	Berks	48 min
Jun 4, 3:14 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	46 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2021 Severe Thunderstorm Warnings in Pennsylvania, 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; radar from the NEXRAD Level II archive.