Alert archive / New Jersey / Tornado Warnings in 2021

Tornado Warning 10, NWS Philadelphia/Mount Holly

July 9, 2021Atlantic County, Burlington County, Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this tornado warning at Jul 9, 2021, 3:38 AM EDT for Atlantic County, Burlington County, Ocean County, New Jersey. It was in force for 18 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 9, 2021, 3:38 AM EDT (07:38 UTC)
Expired: Jul 9, 2021, 3:56 AM EDT
In force: 18 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

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

The radar

The Philadelphia radar (KDIX), 37 km from the middle of the area, began a volume at 07:42 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 7.6 hours before the alert went out and 206 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: 440 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 675 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

As transmitted.

302 
WFUS51 KPHI 090738
TORPHI
NJC001-005-029-090815-
/O.NEW.KPHI.TO.W.0010.210709T0738Z-210709T0815Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
338 AM EDT Fri Jul 9 2021

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  Central Atlantic County in southern New Jersey...
  South central Ocean County in southern New Jersey...
  Southeastern Burlington County in southern New Jersey...

* Until 415 AM EDT.
    
* At 338 AM EDT, a severe thunderstorm capable of producing a tornado
  was located near Tuckerton, or 14 miles north of Atlantic City,
  moving northwest at 20 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...
  Egg Harbor City, Tuckerton, Port Republic, Bass River State Forest,
  Batsto, New Gretna, Penn State Forest, Wading River,
  Elwood-Magnolia and Mystic Island.

This includes Garden State Parkway between mile markers 45 and 60.
 
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 3961 7421 3944 7432 3959 7474 3980 7454
TIME...MOT...LOC 0738Z 118DEG 19KT 3959 7439 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

BAH

2 follow-up statements

708 
WWUS51 KPHI 090744
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
344 AM EDT Fri Jul 9 2021

NJC001-005-029-090815-
/O.CON.KPHI.TO.W.0010.000000T0000Z-210709T0815Z/
Atlantic NJ-Ocean NJ-Burlington NJ-
344 AM EDT Fri Jul 9 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 AM EDT FOR CENTRAL
ATLANTIC...SOUTH CENTRAL OCEAN AND SOUTHEASTERN BURLINGTON
COUNTIES...
    
At 344 AM EDT, a severe thunderstorm capable of producing a tornado
was located over New Gretna, or 14 miles north of Atlantic City,
moving west at 20 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...
Egg Harbor City, Tuckerton, Port Republic, Bass River State Forest,
Batsto, New Gretna, Penn State Forest, Wading River, Elwood-Magnolia
and Mystic Island.

This includes Garden State Parkway between mile markers 45 and 60.
 
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 3965 7429 3949 7442 3959 7474 3980 7454
TIME...MOT...LOC 0744Z 112DEG 19KT 3960 7444 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

BAH

331 
WWUS51 KPHI 090756
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
356 AM EDT Fri Jul 9 2021

NJC001-005-029-090806-
/O.CAN.KPHI.TO.W.0010.000000T0000Z-210709T0815Z/
Atlantic NJ-Ocean NJ-Burlington NJ-
356 AM EDT Fri Jul 9 2021

...THE TORNADO WARNING FOR CENTRAL ATLANTIC...SOUTH CENTRAL OCEAN AND
SOUTHEASTERN BURLINGTON COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.

LAT...LON 3965 7429 3949 7442 3959 7474 3980 7454
TIME...MOT...LOC 0754Z 118DEG 19KT 3963 7451 

$$

BAH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 10:25 PM EDT	Areal Flood Advisory	PHI	Cape May, Cumberland	7 hr
Jul 8, 11:02 PM EDT	Special Marine Warning	PHI		88 min
Jul 8, 11:59 PM EDT	Areal Flood Advisory	PHI	Salem	5 hr
Jul 9, 12:07 AM EDT	Special Marine Warning	PHI		53 min
Jul 9, 12:08 AM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Gloucester	6 hr
Jul 9, 12:25 AM EDT	Special Marine Warning	PHI		95 min
Jul 9, 1:34 AM EDT	Special Marine Warning	PHI		86 min
Jul 9, 1:49 AM EDT	Special Marine Warning	PHI		26 min
Jul 9, 2:05 AM EDT	Areal Flood Advisory	PHI	Burlington, Monmouth, Ocean	8 hr
Jul 9, 2:50 AM EDT	Tornado Warning	PHI	Atlantic, Cape May, Cumberland	25 min
Jul 9, 2:53 AM EDT	Special Marine Warning	PHI		68 min
Jul 9, 3:51 AM EDT	Special Marine Warning	PHI		84 min
Jul 9, 4:08 AM EDT	Gale Warning	PHI		3 hr
Jul 9, 4:41 AM EDT	Tornado Warning	PHI	Monmouth, Ocean	34 min
Jul 9, 4:44 AM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex	5 hr
Jul 9, 4:54 AM EDT	Areal Flood Advisory	PHI	Morris, Somerset	5 hr
Jul 9, 4:58 AM EDT	Special Marine Warning	PHI		39 min
Jul 9, 5:34 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	2 hr
Jul 9, 6:19 PM EDT	Severe Thunderstorm Warning	PHI	Salem	41 min
Jul 9, 6:24 PM EDT	Special Marine Warning	PHI		66 min
Jul 9, 6:50 PM EDT	Areal Flood Advisory	PHI	Gloucester, Salem	2 hr
Jul 9, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	63 min
Jul 9, 7:17 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	23 min
Jul 9, 7:39 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	2 hr
Jul 9, 7:43 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	62 min
Jul 9, 7:46 PM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	108 min

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.