Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 175, NWS Philadelphia/Mount Holly

July 14, 2021Middlesex County, Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2021, 7:24 PM EDT for Middlesex County, Monmouth County, New Jersey. It was in force for 36 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 14, 2021, 7:24 PM EDT (23:24 UTC)
Expired: Jul 14, 2021, 8:00 PM EDT
In force: 36 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), 57 km from the middle of the area, began a volume at 23:24 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 14, 7:24 PM EDT	TSTM WND DMG	Hazlet, NJ	DOWNED WIRES NEAR HAZLET AVENUE AND ROUTE 35. TIME ESTIMATED FROM RADAR.
Jul 14, 7:26 PM EDT	TSTM WND DMG	Union Beach, NJ	DOWNED POWER LINES NEAR A RESIDENCE ON PARK AVENUE. 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

Brookhaven, NY (KOKX), launched 12:00Z, 11.4 hours before the alert went out and 116 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: 1588 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

186 
WUUS51 KPHI 142324
SVRPHI
NJC023-025-150000-
/O.NEW.KPHI.SV.W.0175.210714T2324Z-210715T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
724 PM EDT Wed Jul 14 2021

The National Weather Service in Mount Holly NJ has issued a

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

* Until 800 PM EDT.

* At 721 PM EDT, a severe thunderstorm was located over Red Bank, or 
  near Sandy Hook, moving east at 15 mph. This storm has produced 
  damage with wires down down and power outages near Route 35 in 
  Middletown Township. 

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

  SOURCE...Law enforcement.

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

* Locations impacted include...
  Long Branch, Sandy Hook, Middletown, Tinton Falls, Holmdel, Red
  Bank, Keansburg, Matawan, Highlands, Elberon, Navesink, Collingwood
  Park, Lincroft, East Freehold, Eatontown, West Long Branch,
  Keyport, Rumson, Little Silver and Oceanport.

This includes Garden State Parkway between mile markers 102 and 121.
 
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 4024 7397 4021 7421 4044 7427 4045 7422
      4044 7420 4046 7418 4045 7416 4045 7413
      4041 7399 4044 7399 4048 7402 4047 7400
      4043 7397
TIME...MOT...LOC 2321Z 256DEG 12KT 4038 7407 

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

Fitzsimmons

1 follow-up statement

033 
WWUS51 KPHI 142350
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
750 PM EDT Wed Jul 14 2021

NJC023-142356-
/O.CAN.KPHI.SV.W.0175.000000T0000Z-210715T0000Z/
Middlesex NJ-
750 PM EDT Wed Jul 14 2021

...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 4028 7397 4028 7415 4042 7422 4045 7421
      4044 7420 4046 7418 4045 7416 4045 7412
      4041 7400 4041 7398 4047 7400 4043 7397
TIME...MOT...LOC 2346Z 254DEG 11KT 4040 7407 

$$

NJC025-150000-
/O.CON.KPHI.SV.W.0175.000000T0000Z-210715T0000Z/
Monmouth NJ-
750 PM EDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTHEASTERN MONMOUTH COUNTY...

At 746 PM EDT, a severe thunderstorm was located over Navesink, or 
near Sandy Hook, moving east at 10 mph. This storm has produced 
damage with wires down down and power outages near Route 35 in 
Middletown Township. In addition, flash flooding is occurring near 
Union Beach with Park Avenue closed at Ocean Avenue as Flat Creek is 
flooding with water going into a residence. 

HAZARD...60 mph wind gusts.

SOURCE...Law enforcement.

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

Locations impacted include...
Long Branch, Sandy Hook, Middletown, Tinton Falls, Red Bank,
Keansburg, Highlands, Navesink, Lincroft, Eatontown, West Long
Branch, Keyport, Rumson, Little Silver, Oceanport, Shrewsbury, North
Middletown and Strathmore.

This includes Garden State Parkway between mile markers 107 and 119.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4028 7397 4028 7415 4042 7422 4045 7421
      4044 7420 4046 7418 4045 7416 4045 7412
      4041 7400 4041 7398 4047 7400 4043 7397
TIME...MOT...LOC 2346Z 254DEG 11KT 4040 7407 

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

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 3:42 PM EDT	Special Weather Statement	PHI	Morris	18 min
Jul 14, 5:47 PM EDT	Special Marine Warning	PHI		43 min
Jul 14, 5:54 PM EDT	Special Weather Statement	PHI	Ocean	51 min
Jul 14, 6:41 PM EDT	Special Weather Statement	PHI	Monmouth	34 min
Jul 14, 7:03 PM EDT	Special Marine Warning	PHI		61 min
Jul 14, 7:03 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	42 min
Jul 14, 7:26 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	2 hr
Jul 14, 7:37 PM EDT	Flash Flood Warning	PHI	Monmouth	3 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.