Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 176, NWS Philadelphia/Mount Holly

July 23, 2020Middlesex County, Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2020, 8:04 PM EDT for Middlesex County, Monmouth County, New Jersey. It was in force for 26 min. 6 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 23, 2020, 8:04 PM EDT (00:04 UTC)
Expired: Jul 23, 2020, 8:30 PM EDT
In force: 26 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Middlesex County, NJ, Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 00:07 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 23, 8:07 PM EDT	TSTM WND DMG	Holmdel, NJ	SEVERAL REPORTS OF WIRES DOWN IN THE HOLMDEL AREA. TIME ESTIMATED FROM RADAR.
Jul 23, 8:10 PM EDT	TSTM WND DMG	1 Ese Lincroft, NJ	REPORTS OF TREES AND WIRES DOWN IN THE AREA. TIME ESTIMATED FROM RADAR.
Jul 23, 8:15 PM EDT	TSTM WND GST 60	Red Bank, NJ	POWER OUT IN THE AREA.
Jul 23, 8:24 PM EDT	MARINE TSTM WIND 42	8 S Seagate, NY	SANDY HOOK STATION MEASURED 36.9 KT WIND GUST
Jul 23, 8:24 PM EDT	MARINE TSTM WIND 43	Sandy Hook, NJ
Jul 23, 8:26 PM EDT	TSTM WND DMG	Fair Haven, NJ	SEVERAL REPORTS OF WIRES DOWN AND WIDESPREAD POWER OUTAGES IN THE AREA. TIME ESTIMATED FROM RADAR.

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
Jul 23, 2:49 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.1 hours before the alert went out and 119 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: 1702 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 797 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

As transmitted.

784 
WUUS51 KPHI 240004
SVRPHI
NJC023-025-240030-
/O.NEW.KPHI.SV.W.0176.200724T0004Z-200724T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
804 PM EDT Thu Jul 23 2020

The National Weather Service in Mount Holly NJ has issued a

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

* Until 830 PM EDT.

* At 804 PM EDT, severe thunderstorms were located along a line
  extending from near Middletown to near Lincroft to Howell, moving
  east at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Law enforcement.

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

* Locations impacted include...
  Long Branch, Asbury Park, Sandy Hook, Middletown, Old Bridge,
  Howell, Marlboro, Tinton Falls, Holmdel, Red Bank, Matawan,
  Manasquan, Highlands, Farmingdale, Allenwood, East Freehold, West
  Freehold, Adelphia, Elberon and Navesink.

This includes the following highways...
 Interstate 195 in New Jersey between mile markers 28 and 34.
 Garden State Parkway between mile markers 96 and 120.

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 these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 4031 7396 4010 7402 4014 7411 4013 7412
      4020 7433 4035 7434 4045 7422 4044 7420
      4046 7418 4041 7399 4044 7399 4048 7402
      4047 7399 4045 7398
TIME...MOT...LOC 0004Z 277DEG 23KT 4040 7418 4031 7415 4018 7421 

HAIL...<.75IN
WIND...60MPH
 
$$

Staarmann

1 follow-up statement

808 
WWUS51 KPHI 240017
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
817 PM EDT Thu Jul 23 2020

NJC023-240027-
/O.CAN.KPHI.SV.W.0176.000000T0000Z-200724T0030Z/
Middlesex NJ-
817 PM EDT Thu Jul 23 2020

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MIDDLESEX COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4026 7397 4017 7400 4023 7422 4041 7417
      4043 7405 4041 7399 4042 7398 4043 7399
      4044 7398 4036 7397
TIME...MOT...LOC 0017Z 273DEG 23KT 4034 7405 

$$

NJC025-240030-
/O.CON.KPHI.SV.W.0176.000000T0000Z-200724T0030Z/
Monmouth NJ-
817 PM EDT Thu Jul 23 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR NORTHEASTERN MONMOUTH COUNTY...

At 817 PM EDT, a severe thunderstorm was located over Red Bank, or
near Long Branch, moving east at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Law enforcement.

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

Locations impacted include...
Long Branch, Asbury Park, Middletown, Tinton Falls, Holmdel, Red
Bank, Highlands, Elberon, Navesink, Collingwood Park, Lincroft,
Eatontown, West Long Branch, Rumson, Little Silver, Oceanport,
Neptune City, Bradley Beach, Shrewsbury and Avon-By-the-sea.

This includes Garden State Parkway between mile markers 101 and 115.
 
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.

&&

LAT...LON 4026 7397 4017 7400 4023 7422 4041 7417
      4043 7405 4041 7399 4042 7398 4043 7399
      4044 7398 4036 7397
TIME...MOT...LOC 0017Z 273DEG 23KT 4034 7405 

HAIL...<.75IN
WIND...60MPH
 
$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 11:16 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	44 min
Jul 23, 11:27 PM EDT	Special Marine Warning	PHI		63 min
Jul 24, 12:14 AM EDT	Special Weather Statement	PHI	Middlesex	31 min
Jul 24, 12:23 AM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Somerset	52 min
Jul 24, 12:31 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	119 min
Jul 24, 12:51 AM EDT	Special Marine Warning	PHI		54 min
Jul 24, 1:13 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	62 min
Jul 24, 1:28 AM EDT	Flash Flood Warning	PHI	Mercer, Middlesex, Monmouth, Somerset	4 hr
Jul 24, 1:36 AM EDT	Special Marine Warning	PHI		84 min
Jul 24, 2:18 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	42 min
Jul 24, 5:04 AM EDT	Special Marine Warning	PHI		56 min
Jul 24, 10:43 AM EDT	Flash Flood Warning	PHI	Camden	76 min
Jul 24, 11:42 AM EDT	Special Marine Warning	PHI		63 min
Jul 24, 12:43 PM EDT	Areal Flood Advisory	PHI	Ocean	3 hr
Jul 24, 1:09 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	110 min
Jul 24, 1:40 PM EDT	Special Weather Statement	PHI	Atlantic	35 min
Jul 24, 1:43 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Monmouth	3 hr
Jul 24, 2:02 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Gloucester	3 hr
Jul 24, 2:19 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	2 hr
Jul 24, 2:26 PM EDT	Flash Flood Warning	PHI	Burlington	2 hr
Jul 24, 2:39 PM EDT	Areal Flood Advisory	PHI	Burlington, Ocean	3 hr
Jul 24, 2:42 PM EDT	Areal Flood Advisory	PHI	Burlington, Ocean	2 hr
Jul 24, 3:34 PM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Ocean	2 hr
Jul 24, 4:22 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May	3 hr
Jul 24, 4:58 PM EDT	Areal Flood Advisory	PHI	Cape May	2 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.