Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 102, NWS Philadelphia/Mount Holly

July 3, 2020Middlesex County, Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 3, 2020, 8:19 PM EDT for Middlesex County, Monmouth County, New Jersey. It was in force for 41 min. 2 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: Jul 3, 2020, 8:19 PM EDT (00:19 UTC)
Expired: Jul 3, 2020, 9:00 PM EDT
In force: 41 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Middlesex County, NJ, Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 61 km from the middle of the area, began a volume at 00:21 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
Jul 3, 8:25 PM EDT	TSTM WND DMG	South Plainfield, NJ	WIRES DOWN IN SOUTH PLAINFIELD. TIME ESTIMATED FROM RADAR.
Jul 3, 8:26 PM EDT	TSTM WND DMG	1 E South Plainfield, NJ	TREE LIMBS DOWN ONTO WIRES ON WOODLAND AVE IN S PLAINFIELD. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 0.3 hours before the alert went out and 249 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: 442 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 962 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

974 
WUUS51 KPHI 040019
SVRPHI
NJC023-025-040100-
/O.NEW.KPHI.SV.W.0102.200704T0019Z-200704T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
819 PM EDT Fri Jul 3 2020

The National Weather Service in Mount Holly NJ has issued a

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

* Until 900 PM EDT.

* At 819 PM EDT, a severe thunderstorm was located over Plainfield,
  moving south at 25 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  New Brunswick, Perth Amboy, Sandy Hook, Edison, Middletown, Old
  Bridge, East Brunswick, Sayreville, Carteret, Matawan, Highlands,
  Colonia, Brownville, Navesink, Morganville, Society Hill, North
  Brunswick Township, Lincroft, Woodbridge and South Plainfield.

This includes the following highways...
 New Jersey Turnpike between exits 10 and 13.
 Interstate 287 in New Jersey between mile markers 0 and 6.
 Garden State Parkway between mile markers 114 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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 4032 7442 4060 7446 4060 7421 4056 7421
      4055 7425 4050 7426 4050 7428 4047 7427
      4044 7420 4046 7418 4041 7398 4048 7402
      4048 7401 4043 7397 4040 7397
TIME...MOT...LOC 0019Z 344DEG 21KT 4061 7438 

HAIL...<.75IN
WIND...70MPH
 
$$

CMS

3 follow-up statements

325 
WWUS51 KPHI 040025
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
825 PM EDT Fri Jul 3 2020

NJC023-025-040100-
/O.CON.KPHI.SV.W.0102.000000T0000Z-200704T0100Z/
Monmouth NJ-Middlesex NJ-
825 PM EDT Fri Jul 3 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHEASTERN MONMOUTH AND EASTERN MIDDLESEX COUNTIES...

At 824 PM EDT, a severe thunderstorm was located over Colonia, or
near Plainfield, moving south at 25 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated. There are strong indications a microburst 
         with damaging wind gusts and large hail is imminent in 
         northeastern Middlesex County.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
New Brunswick, Perth Amboy, Sandy Hook, Edison, Middletown, Old
Bridge, East Brunswick, Sayreville, Carteret, Matawan, Highlands,
Colonia, Brownville, Navesink, Morganville, Society Hill, North
Brunswick Township, Lincroft, Woodbridge and South Plainfield.

This includes the following highways...
 New Jersey Turnpike between exits 10 and 13.
 Interstate 287 in New Jersey between mile markers 0 and 6.
 Garden State Parkway between mile markers 114 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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

Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
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 4032 7442 4060 7446 4060 7421 4056 7421
      4055 7425 4050 7426 4050 7428 4047 7427
      4044 7420 4046 7418 4041 7398 4048 7402
      4048 7401 4043 7397 4040 7397
TIME...MOT...LOC 0024Z 344DEG 21KT 4058 7437 

HAIL...1.00IN
WIND...70MPH
 
$$

CMS

925 
WWUS51 KPHI 040049
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
849 PM EDT Fri Jul 3 2020

NJC023-025-040100-
/O.CON.KPHI.SV.W.0102.000000T0000Z-200704T0100Z/
Monmouth NJ-Middlesex NJ-
849 PM EDT Fri Jul 3 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHEASTERN MONMOUTH AND SOUTHEASTERN MIDDLESEX COUNTIES...

At 848 PM EDT, a severe thunderstorm was located over Old Bridge, or
7 miles southeast of New Brunswick, moving south at 25 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Law enforcement. Power lines were downed in South 
         Plainfield as this storm passed.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
New Brunswick, Sandy Hook, Middletown, Old Bridge, East Brunswick,
Sayreville, Matawan, Highlands, Brownville, Navesink, Morganville,
Lincroft, North Brunswick Township, South River, Highland Park,
Spotswood, Keyport, Milltown, Helmetta and Madison Park.

This includes the following highways...
 New Jersey Turnpike near exit 10.
 Garden State Parkway between mile markers 114 and 126.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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

Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
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 4032 7442 4049 7444 4050 7429 4047 7427
      4044 7420 4046 7418 4041 7403 4041 7398
      4048 7402 4048 7401 4043 7397 4040 7397
TIME...MOT...LOC 0048Z 348DEG 22KT 4043 7433 

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

CMS

525 
WWUS51 KPHI 040059
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
859 PM EDT Fri Jul 3 2020

NJC023-025-040109-
/O.EXP.KPHI.SV.W.0102.000000T0000Z-200704T0100Z/
Monmouth NJ-Middlesex NJ-
859 PM EDT Fri Jul 3 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MONMOUTH AND
SOUTHEASTERN MIDDLESEX COUNTIES WILL EXPIRE AT 900 PM 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 are still possible with this thunderstorm.

LAT...LON 4032 7442 4049 7444 4050 7429 4047 7427
      4044 7420 4046 7418 4041 7403 4041 7398
      4048 7402 4048 7401 4043 7397 4040 7397
TIME...MOT...LOC 0059Z 344DEG 21KT 4037 7431 

$$

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 8:08 PM EDT	Special Weather Statement	PHI	Hunterdon, Mercer	37 min
Jul 3, 8:13 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex	24 min
Jul 3, 8:44 PM EDT	Special Weather Statement	PHI	Mercer	31 min
Jul 3, 8:54 PM EDT	Special Marine Warning	PHI		66 min
Jul 3, 8:59 PM EDT	Special Weather Statement	PHI	Burlington	31 min
Jul 3, 9:03 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	4 hr
Jul 3, 9:05 PM EDT	Special Weather Statement	PHI	Monmouth	25 min
Jul 3, 9:23 PM EDT	Special Weather Statement	PHI	Burlington, Camden	52 min
Jul 3, 9:45 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Ocean	60 min
Jul 3, 9:47 PM EDT	Special Marine Warning	PHI		88 min
Jul 3, 10:51 PM EDT	Special Marine Warning	PHI		64 min
Jul 3, 10:59 PM EDT	Special Weather Statement	PHI	Salem	46 min
Jul 3, 11:12 PM EDT	Special Marine Warning	PHI		60 min
Jul 4, 3:52 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Cape May, Cumberland	20 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020 Every severe thunderstorm warning in 2020

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.