Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 141, NWS Philadelphia/Mount Holly

July 6, 20214 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2021, 11:30 PM EDT for 4 counties in New Jersey. It was in force for 45 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: Jul 6, 2021, 11:30 PM EDT (03:30 UTC)
Expired: Jul 7, 2021, 12:15 AM EDT
In force: 45 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 25 km from the middle of the area, began a volume at 03:32 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 3.5 hours before the alert went out and 186 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: 1647 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

As transmitted.

502 
WUUS51 KPHI 070330
SVRPHI
NJC001-005-007-029-070415-
/O.NEW.KPHI.SV.W.0141.210707T0330Z-210707T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1130 PM EDT Tue Jul 6 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Atlantic County in southern New Jersey...
  Central Ocean County in southern New Jersey...
  Central Camden County in southern New Jersey...
  Burlington County in southern New Jersey...

* Until 1215 AM EDT.

* At 1130 PM EDT, a severe thunderstorm was located over Lumberton,
  or 15 miles east of Camden, moving southeast 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...
  Toms River, Evesham, Mount Laurel, Willingboro, Voorhees, Medford,
  Hammonton, Lumberton, Florence, Beachwood, Burlington, Bristol,
  Mount Holly, Tabernacle, Shamong, Presidential Lakes Estates,
  Tullytown, Pemberton, Wrightstown and Florence-Roebling.

This includes the following highways...
 New Jersey Turnpike between exits 4 and 6A.
 Interstate 295 in New Jersey between mile markers 38 and 55.
 Garden State Parkway between mile markers 75 and 81.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

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

&&

LAT...LON 3960 7455 3985 7501 4009 7486 4010 7484
      4013 7482 4012 7478 4013 7476 3993 7412
TIME...MOT...LOC 0330Z 292DEG 36KT 3994 7482 

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

MPS

2 follow-up statements

396 
WWUS51 KPHI 070347
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1147 PM EDT Tue Jul 6 2021

NJC001-007-070357-
/O.CAN.KPHI.SV.W.0141.000000T0000Z-210707T0415Z/
Atlantic NJ-Camden NJ-
1147 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ATLANTIC AND CENTRAL
CAMDEN 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 3972 7439 3965 7448 3977 7479 3979 7481
      3979 7485 3981 7490 4011 7471 3996 7421
TIME...MOT...LOC 0347Z 285DEG 34KT 3989 7470 

$$

NJC005-029-070415-
/O.CON.KPHI.SV.W.0141.000000T0000Z-210707T0415Z/
Ocean NJ-Burlington NJ-
1147 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT
FOR NORTHWESTERN OCEAN AND BURLINGTON COUNTIES...

At 1147 PM EDT, a severe thunderstorm was located over Leisuretowne,
or 21 miles east of Camden, 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...
Toms River, Medford, Tabernacle, Shamong, Presidential Lakes Estates,
Pemberton, Wrightstown, Holiday City South, Warren Grove,
Leisuretowne, Chatsworth, Georgetown, Wharton State Forest,
Presidential Lakes, Holiday City-Berkeley, Bamber Lake, Cedar Glen
Lakes, Whiting, Pine Ridge At Crestwood and Browns Mills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.

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

&&

LAT...LON 3972 7439 3965 7448 3977 7479 3979 7481
      3979 7485 3981 7490 4011 7471 3996 7421
TIME...MOT...LOC 0347Z 285DEG 34KT 3989 7470 

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

MPS

855 
WWUS51 KPHI 070407
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1207 AM EDT Wed Jul 7 2021

NJC005-029-070417-
/O.EXP.KPHI.SV.W.0141.000000T0000Z-210707T0415Z/
Ocean NJ-Burlington NJ-
1207 AM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN OCEAN AND
BURLINGTON COUNTIES WILL EXPIRE AT 1215 AM EDT...
                
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 will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 3972 7439 3965 7448 3977 7479 3979 7481
      3979 7485 3981 7490 4011 7471 3996 7421
TIME...MOT...LOC 0407Z 292DEG 36KT 3983 7450 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 8:03 PM EDT	Special Weather Statement	PHI	Burlington, Ocean	42 min
Jul 6, 8:11 PM EDT	Special Marine Warning	PHI		82 min
Jul 6, 8:24 PM EDT	Special Marine Warning	PHI		2 hr
Jul 6, 8:29 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	46 min
Jul 6, 8:37 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Monmouth, Morris, Somerset	53 min
Jul 6, 8:50 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	40 min
Jul 6, 9:04 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	41 min
Jul 6, 9:10 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 1 more	2 hr
Jul 6, 9:29 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset	61 min
Jul 6, 9:37 PM EDT	Special Marine Warning	PHI		113 min
Jul 6, 9:48 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	57 min
Jul 6, 10:21 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	39 min
Jul 6, 10:50 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	2 hr
Jul 6, 10:54 PM EDT	Special Weather Statement	PHI	Burlington	51 min
Jul 6, 11:11 PM EDT	Special Weather Statement	PHI	Burlington	19 min
Jul 6, 11:39 PM EDT	Special Marine Warning	PHI		66 min
Jul 6, 11:55 PM EDT	Special Weather Statement	PHI	Monmouth	50 min
Jul 7, 12:01 AM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	71 min
Jul 7, 12:10 AM EDT	Special Marine Warning	PHI		95 min
Jul 7, 11:19 AM EDT	Tropical Storm Watch	PHI	Atlantic, Burlington, Cape May, Monmouth, Ocean	18 hr
Jul 7, 3:32 PM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	42 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; radar from the NEXRAD Level II archive.