Alert archive / New Jersey / Tornado Warnings in 2020

Tornado Warning 24, NWS Philadelphia/Mount Holly

August 4, 2020Atlantic County, Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this tornado warning at Aug 4, 2020, 9:42 AM EDT for Atlantic County, Cape May County, New Jersey. It was in force for 19 min. 1 report 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: Aug 4, 2020, 9:42 AM EDT (13:42 UTC)
Expired: Aug 4, 2020, 10:01 AM EDT
In force: 19 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Atlantic County, NJ, Cape May County, NJ

The radar

The Philadelphia radar (KDIX), 79 km from the middle of the area, began a volume at 13:42 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.

What was reported inside it

Time	Report	Where	Remark
Aug 4, 9:48 AM EDT	TORNADO	2 W Strathmere, NJ	CROSSING ROUTE 50.

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
Aug 4, 2:26 AM EDT	Tornado Watch	SPC	9 hr
Aug 4, 7:23 AM EDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 1.7 hours before the alert went out and 162 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: 472 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 648 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 254 m²/s²
0-3 km storm-relative helicity: 273 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

As transmitted.

760 
WFUS51 KPHI 041342
TORPHI
NJC001-009-041415-
/O.NEW.KPHI.TO.W.0024.200804T1342Z-200804T1415Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  Southwestern Atlantic County in southern New Jersey...
  Northeastern Cape May County in southern New Jersey...

* Until 1015 AM EDT.
    
* At 942 AM EDT, a severe thunderstorm capable of producing a tornado
  was located near Sea Isle City, or 9 miles south of Ocean 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...
  Ocean City, Somers Point, Egg Harbor City, Weymouth, Sea Isle City,
  Estell Manor, Corbin City, Mays Landing, Beesleys Point, English
  Creek, Seaville, Marmora, Dorothy, Strathmere, Mizpah,
  Elwood-Magnolia and Linwood.

This includes the following highways...
 Garden State Parkway between mile markers 19 and 34.
 Atlantic City Expressway between mile markers 10 and 22.

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 3907 7455 3905 7465 3953 7492 3959 7460
TIME...MOT...LOC 1342Z 168DEG 53KT 3913 7463 

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

$$

SFJ

3 follow-up statements

900 
WWUS51 KPHI 041350
SVSPHI

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

NJC001-009-041415-
/O.CON.KPHI.TO.W.0024.000000T0000Z-200804T1415Z/
Atlantic NJ-Cape May NJ-
950 AM EDT Tue Aug 4 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 AM EDT FOR
SOUTHWESTERN ATLANTIC AND NORTHEASTERN CAPE MAY COUNTIES...
    
At 950 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Marmora, or near Ocean 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...
Ocean City, Somers Point, Egg Harbor City, Weymouth, Estell Manor,
Corbin City, Mays Landing, Beesleys Point, English Creek, Seaville,
Marmora, Dorothy, Strathmere, Mizpah, Elwood-Magnolia and Linwood.

This includes the following highways...
 Garden State Parkway between mile markers 19 and 33.
 Atlantic City Expressway between mile markers 10 and 22.

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 3920 7457 3918 7471 3953 7492 3959 7460
TIME...MOT...LOC 1350Z 167DEG 55KT 3926 7467 

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

$$

SFJ

356 
WWUS51 KPHI 041354
SVSPHI

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

NJC001-009-041415-
/O.CON.KPHI.TO.W.0024.000000T0000Z-200804T1415Z/
Atlantic NJ-Cape May NJ-
954 AM EDT Tue Aug 4 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 AM EDT FOR
SOUTHWESTERN ATLANTIC AND NORTHEASTERN CAPE MAY COUNTIES...
    
At 953 AM EDT, a confirmed tornado was located over Corbin City, or
near Ocean City, moving north at 65 mph.

HAZARD...Damaging tornado.

SOURCE...Weather spotters confirmed tornado.

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...
Ocean City, Somers Point, Egg Harbor City, Weymouth, Estell Manor,
Corbin City, Mays Landing, Beesleys Point, English Creek, Marmora,
Dorothy, Mizpah and Elwood-Magnolia.

This includes the following highways...
 Garden State Parkway between mile markers 22 and 31.
 Atlantic City Expressway between mile markers 11 and 22.

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.

To repeat, a tornado has been confirmed. 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 3924 7460 3921 7472 3922 7474 3953 7492
      3959 7460
TIME...MOT...LOC 1353Z 168DEG 55KT 3932 7469 

TORNADO...OBSERVED
HAIL...0.00IN

$$

SFJ

677 
WWUS51 KPHI 041401
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1001 AM EDT Tue Aug 4 2020

NJC001-009-041411-
/O.CAN.KPHI.TO.W.0024.000000T0000Z-200804T1415Z/
Atlantic NJ-Cape May NJ-
1001 AM EDT Tue Aug 4 2020

...THE TORNADO WARNING FOR SOUTHWESTERN ATLANTIC AND NORTHEASTERN
CAPE MAY 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 noon EDT for southern New
Jersey. A Tornado Watch also remains in effect until 400 PM EDT for
southern New Jersey.

LAT...LON 3924 7460 3921 7472 3922 7474 3953 7492
      3959 7460
TIME...MOT...LOC 1359Z 168DEG 53KT 3944 7472 

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 8:07 PM EDT	Special Weather Statement	PHI	Hunterdon, Somerset, Warren	23 min
Aug 3, 8:26 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	34 min
Aug 3, 9:02 PM EDT	Special Weather Statement	PHI	Morris	28 min
Aug 4, 5:17 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Salem and 1 more	4 hr
Aug 4, 5:55 AM EDT	Special Marine Warning	PHI		21 min
Aug 4, 7:28 AM EDT	Flash Flood Warning	PHI	Gloucester, Salem	3 hr
Aug 4, 8:38 AM EDT	Special Marine Warning	PHI		52 min
Aug 4, 9:16 AM EDT	Tornado Warning	PHI	Cumberland	18 min
Aug 4, 9:28 AM EDT	Special Marine Warning	PHI		32 min
Aug 4, 9:31 AM EDT	Special Marine Warning	PHI		59 min
Aug 4, 10:02 AM EDT	Flash Flood Warning	PHI	Gloucester, Salem	4 hr
Aug 4, 10:15 AM EDT	Tornado Warning	PHI	Atlantic, Burlington, Ocean	14 min
Aug 4, 10:20 AM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester	4 hr
Aug 4, 11:00 AM EDT	Tornado Warning Tornado observed	PHI	Monmouth, Ocean	11 min
Aug 4, 11:01 AM EDT	Flash Flood Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	4 hr
Aug 4, 11:13 AM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
Aug 4, 11:43 AM EDT	Flash Flood Warning	PHI	Warren	4 hr
Aug 4, 11:59 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Monmouth, Morris, Somerset	4 hr
Aug 4, 2:33 PM EDT	River Flood Warning	PHI	Hunterdon, Somerset	5 hr
Aug 4, 2:47 PM EDT	Areal Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset, Warren	9 hr
Aug 4, 3:42 PM EDT	Areal Flood Warning	PHI	Warren	4 hr
Aug 4, 4:37 PM EDT	Areal Flood Warning	PHI	Cumberland, Salem	10 hr
Aug 4, 5:04 PM EDT	Small Craft Advisory	PHI		14 hr
Aug 4, 5:30 PM EDT	Coastal Flood Statement	PHI	Ocean	103 min

Nearby

Tornado Warnings in New Jersey, 2020 Every tornado warning in 2020 Tornadoes 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.