Alert archive / New Jersey / Tornado Warnings in 2020

Tornado Warning 26, NWS Philadelphia/Mount Holly

August 4, 2020Atlantic County, Burlington County, Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this tornado warning at Aug 4, 2020, 10:15 AM EDT for Atlantic County, Burlington County, Ocean County, New Jersey. It was in force for 14 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
Aug 4, 2020, 10:15 AM EDT (14:15 UTC)
Expired
Aug 4, 2020, 10:29 AM EDT
In force
14 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), 44 km from the middle of the area, began a volume at 14:16 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.

IssuedProductOfficeLasted
Aug 4, 7:23 AM EDTTornado WatchSPC9 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 2.3 hours before the alert went out and 194 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2020-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1593 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2020-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1593 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
570 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
245 m²/s²
Significant tornado parameter
1.5
Supercell composite
7.4

Open this sounding in Storm Lab

The text

As transmitted.

724 
WFUS51 KPHI 041415
TORPHI
NJC001-005-029-041445-
/O.NEW.KPHI.TO.W.0026.200804T1415Z-200804T1445Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
1015 AM EDT Tue Aug 4 2020

The National Weather Service in Mount Holly NJ has issued a

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

* Until 1045 AM EDT.
    
* At 1014 AM EDT, a severe thunderstorm capable of producing a
  tornado was located over Brigantine, or near Atlantic City, moving
  north at 65 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...
  Atlantic City, Brigantine, Tuckerton, Port Republic, Brookville,
  Warren Grove, Bass River State Forest, Chatsworth, New Gretna, Penn
  State Forest, Mystic Island and Ocean Acres.

This includes Garden State Parkway between mile markers 48 and 63.
 
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.

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 3935 7431 3935 7442 3984 7455 3987 7427
TIME...MOT...LOC 1414Z 174DEG 58KT 3940 7435 

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

$$

SFJ
2 follow-up statements
308 
WWUS51 KPHI 041424
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1024 AM EDT Tue Aug 4 2020

NJC001-005-029-041445-
/O.CON.KPHI.TO.W.0026.000000T0000Z-200804T1445Z/
Atlantic NJ-Ocean NJ-Burlington NJ-
1024 AM EDT Tue Aug 4 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 AM EDT FOR EAST
CENTRAL ATLANTIC...SOUTH CENTRAL OCEAN AND SOUTHEASTERN BURLINGTON
COUNTIES...
    
At 1024 AM EDT, a severe thunderstorm capable of producing a tornado
was located near Port Republic, or 10 miles north of Atlantic City,
moving north at 60 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...
Tuckerton, Port Republic, Brookville, Warren Grove, Bass River State
Forest, Chatsworth, New Gretna, Penn State Forest, Mystic Island and
Ocean Acres.

This includes Garden State Parkway between mile markers 48 and 62.
 
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.

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 3948 7432 3946 7445 3984 7455 3987 7427
TIME...MOT...LOC 1424Z 171DEG 53KT 3953 7439 

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

$$

SFJ
644 
WWUS51 KPHI 041429
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1029 AM EDT Tue Aug 4 2020

NJC001-005-029-041439-
/O.CAN.KPHI.TO.W.0026.000000T0000Z-200804T1445Z/
Atlantic NJ-Ocean NJ-Burlington NJ-
1029 AM EDT Tue Aug 4 2020

...THE TORNADO WARNING FOR EAST 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.

A Tornado Watch remains in effect until 400 PM EDT for southern New
Jersey.

LAT...LON 3948 7432 3946 7445 3984 7455 3987 7427
TIME...MOT...LOC 1427Z 174DEG 58KT 3962 7440 

$$

SFJ

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 8:07 PM EDTSpecial Weather StatementPHIHunterdon, Somerset, Warren23 min
Aug 3, 8:26 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset34 min
Aug 3, 9:02 PM EDTSpecial Weather StatementPHIMorris28 min
Aug 4, 5:17 AM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Hunterdon, Mercer, Salem and 1 more4 hr
Aug 4, 5:55 AM EDTSpecial Marine WarningPHI21 min
Aug 4, 7:28 AM EDTFlash Flood WarningPHIGloucester, Salem3 hr
Aug 4, 8:38 AM EDTSpecial Marine WarningPHI52 min
Aug 4, 9:16 AM EDTTornado WarningPHICumberland18 min
Aug 4, 9:28 AM EDTSpecial Marine WarningPHI32 min
Aug 4, 9:31 AM EDTSpecial Marine WarningPHI59 min
Aug 4, 9:42 AM EDTTornado WarningPHIAtlantic, Cape May19 min
Aug 4, 10:02 AM EDTFlash Flood WarningPHIGloucester, Salem4 hr
Aug 4, 10:20 AM EDTFlash Flood WarningPHIBurlington, Camden, Gloucester4 hr
Aug 4, 11:00 AM EDTTornado Warning Tornado observedPHIMonmouth, Ocean11 min
Aug 4, 11:01 AM EDTFlash Flood WarningPHIBurlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more4 hr
Aug 4, 11:13 AM EDTAreal Flood AdvisoryPHISussex, Warren4 hr
Aug 4, 11:43 AM EDTFlash Flood WarningPHIWarren4 hr
Aug 4, 11:59 AM EDTAreal Flood AdvisoryPHIHunterdon, Middlesex, Monmouth, Morris, Somerset4 hr
Aug 4, 2:33 PM EDTRiver Flood WarningPHIHunterdon, Somerset5 hr
Aug 4, 2:47 PM EDTAreal Flood WarningPHIHunterdon, Mercer, Middlesex, Somerset, Warren9 hr
Aug 4, 3:42 PM EDTAreal Flood WarningPHIWarren4 hr
Aug 4, 4:37 PM EDTAreal Flood WarningPHICumberland, Salem10 hr
Aug 4, 5:04 PM EDTSmall Craft AdvisoryPHI14 hr
Aug 4, 5:30 PM EDTCoastal Flood StatementPHIOcean103 min

Nearby

Tornado Warnings in New Jersey, 2020Every tornado warning in 2020Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.