Alert archive / New Jersey / Tornado Warnings in 2021

Tornado Warning 29, NWS Philadelphia/Mount Holly

July 29, 2021Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this tornado warning at Jul 29, 2021, 8:42 PM EDT for Monmouth County, New Jersey. It was in force for 19 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 29, 2021, 8:42 PM EDT (00:42 UTC)
Expired: Jul 29, 2021, 9:01 PM EDT
In force: 19 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 40 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
Jul 29, 2:23 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.7 hours before the alert went out and 126 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: 635 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 502 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 381 m²/s²
0-3 km storm-relative helicity: 515 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

As transmitted.

012 
WFUS51 KPHI 300042
TORPHI
NJC025-300115-
/O.NEW.KPHI.TO.W.0029.210730T0042Z-210730T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
842 PM EDT Thu Jul 29 2021

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  East central Monmouth County in central New Jersey...

* Until 915 PM EDT.
    
* At 842 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Asbury Park, moving northeast at 15 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Asbury Park, Neptune City, Spring Lake Heights, Bradley Beach,
  Spring Lake, Avon-By-the-sea, Sea Girt, Interlaken, Deal,
  Allenhurst, Loch Arbour, Ocean Grove, Shark River Hills, West
  Belmar, South Belmar and Wanamassa.

This includes Garden State Parkway near mile marker 99.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4014 7405 4018 7411 4027 7398 4014 7401
TIME...MOT...LOC 0042Z 245DEG 14KT 4017 7404 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Staarmann

2 follow-up statements

448 
WWUS51 KPHI 300055
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
855 PM EDT Thu Jul 29 2021

NJC025-300115-
/O.CON.KPHI.TO.W.0029.000000T0000Z-210730T0115Z/
Monmouth NJ-
855 PM EDT Thu Jul 29 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR EASTERN
MONMOUTH COUNTY...
    
At 855 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Asbury Park, moving northeast at 15 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Asbury Park, Neptune City, Bradley Beach, Interlaken, Deal,
Allenhurst, Loch Arbour, Ocean Grove and Wanamassa.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4027 7398 4020 7400 4020 7403 4023 7404
TIME...MOT...LOC 0055Z 234DEG 15KT 4023 7399 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Staarmann

792 
WWUS51 KPHI 300101
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
901 PM EDT Thu Jul 29 2021

NJC025-300110-
/O.CAN.KPHI.TO.W.0029.000000T0000Z-210730T0115Z/
Monmouth NJ-
901 PM EDT Thu Jul 29 2021

...THE TORNADO WARNING FOR EASTERN MONMOUTH COUNTY IS CANCELLED...
        
The storm which prompted the warning has weakened below severe 
limits, and has exited the warned area offshore. Therefore, the 
warning has been cancelled.  However gusty winds and heavy rain are 
still possible with this thunderstorm.

A Tornado Watch remains in effect until 1000 PM EDT for central New
Jersey.

LAT...LON 4027 7398 4020 7400 4020 7403 4023 7404
TIME...MOT...LOC 0100Z 245DEG 14KT 4024 7396 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 8:03 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	57 min
Jul 29, 8:03 PM EDT	Tornado Warning	PHI	Ocean	27 min
Jul 29, 8:19 PM EDT	Flash Flood Warning	PHI	Burlington, Monmouth, Ocean	4 hr
Jul 29, 8:39 PM EDT	Tornado Warning	PHI	Burlington, Ocean	51 min
Jul 29, 8:43 PM EDT	Flash Flood Warning	PHI	Monmouth, Ocean	3 hr
Jul 29, 9:15 PM EDT	Special Marine Warning	PHI		2 hr

Nearby

Tornado Warnings in New Jersey, 2021 Every tornado warning in 2021 Tornadoes 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.