Alert archive / New Jersey / Tornado Warnings in 2020

Tornado Warning 35, NWS Philadelphia/Mount Holly

November 30, 2020Kent County, Delaware; Cumberland County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this tornado warning at Nov 30, 2020, 3:47 PM EST for Kent County, Delaware; Cumberland County, Salem County, New Jersey. It was in force for 28 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: Nov 30, 2020, 3:47 PM EST (20:47 UTC)
Expired: Nov 30, 2020, 4:15 PM EST
In force: 28 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Kent County, DE, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 20:51 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
Nov 30, 1:07 PM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.8 hours before the alert went out and 160 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: 2 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 524 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 326 m²/s²
0-3 km storm-relative helicity: 630 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

924 
WFUS51 KPHI 302047
TORPHI
DEC001-NJC011-033-302115-
/O.NEW.KPHI.TO.W.0035.201130T2047Z-201130T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
347 PM EST Mon Nov 30 2020

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  North central Kent County in central Delaware...
  Northwestern Cumberland County in southern New Jersey...
  South central Salem County in southern New Jersey...

* Until 415 PM EST.
    
* At 347 PM EST, a severe thunderstorm capable of producing a tornado
  was located over Woodland Beach, or 11 miles north of Dover, moving
  northeast at 35 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...
  Bridgeton, Alloway, Greenwich, Shiloh, Newport Meadows, Woodland
  Beach and Fairton.

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 3934 7555 3935 7555 3935 7554 3936 7552
      3940 7552 3956 7535 3941 7518 3927 7551
      3933 7557
TIME...MOT...LOC 2047Z 230DEG 32KT 3933 7552 

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

$$

Iovino

2 follow-up statements

089 
WWUS51 KPHI 302059
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
359 PM EST Mon Nov 30 2020

DEC001-302109-
/O.CAN.KPHI.TO.W.0035.000000T0000Z-201130T2115Z/
Kent DE-
359 PM EST Mon Nov 30 2020

...THE TORNADO WARNING FOR NORTH CENTRAL KENT COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of Kent County. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 700 PM EST for southern New
Jersey.

LAT...LON 3948 7543 3956 7535 3946 7524 3934 7542
      3943 7549
TIME...MOT...LOC 2059Z 230DEG 32KT 3940 7541 

$$

NJC011-033-302115-
/O.CON.KPHI.TO.W.0035.000000T0000Z-201130T2115Z/
Cumberland NJ-Salem NJ-
359 PM EST Mon Nov 30 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM EST FOR
NORTHWESTERN CUMBERLAND AND SOUTH CENTRAL SALEM COUNTIES...
    
At 359 PM EST, a severe thunderstorm capable of producing a tornado
was located over Newport Meadows, or 10 miles west of Bridgeton,
moving northeast at 35 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...
Alloway, Shiloh and Newport Meadows. 

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 7543 3956 7535 3946 7524 3934 7542
      3943 7549
TIME...MOT...LOC 2059Z 230DEG 32KT 3940 7541 

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

$$

Iovino

267 
WWUS51 KPHI 302106
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
406 PM EST Mon Nov 30 2020

NJC011-033-302116-
/O.EXP.KPHI.TO.W.0035.000000T0000Z-201130T2115Z/
Cumberland NJ-Salem NJ-
406 PM EST Mon Nov 30 2020

...THE TORNADO WARNING FOR NORTHWESTERN CUMBERLAND AND SOUTH CENTRAL
SALEM COUNTIES WILL EXPIRE AT 415 PM EST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 700 PM EST for southern New
Jersey.

LAT...LON 3948 7543 3956 7535 3946 7524 3934 7542
      3943 7549
TIME...MOT...LOC 2106Z 230DEG 32KT 3943 7536 

$$

Iovino

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 30, 11:35 AM EST	River Flood Warning	PHI	New Castle	11 hr
Nov 30, 12:15 PM EST	Areal Flood Advisory	PHI	New Castle	3 hr
Nov 30, 2:01 PM EST	Coastal Flood Statement	PHI	Sussex	3 hr
Nov 30, 2:41 PM EST	Severe Thunderstorm Warning	PHI	New Castle	49 min
Nov 30, 2:48 PM EST	Areal Flood Warning	PHI	New Castle	8 hr
Nov 30, 3:01 PM EST	Severe Thunderstorm Warning	PHI	New Castle	44 min
Nov 30, 3:04 PM EST	Severe Thunderstorm Warning	PHI	Kent, New Castle	56 min
Nov 30, 3:21 PM EST	Tornado Warning Tornado observed	PHI	Kent	24 min
Nov 30, 5:24 PM EST	River Flood Warning	PHI	New Castle	5 hr
Nov 30, 5:39 PM EST	River Flood Warning	PHI	New Castle	4 hr
Nov 30, 12:52 PM EST	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more	92 min
Nov 30, 1:28 PM EST	Areal Flood Advisory	PHI	Hunterdon, Warren	2 hr
Nov 30, 2:01 PM EST	Areal Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	9 hr
Nov 30, 2:18 PM EST	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester	2 hr
Nov 30, 2:34 PM EST	Special Weather Statement	PHI	Morris, Sussex	56 min
Nov 30, 3:26 PM EST	Areal Flood Warning	PHI	Hunterdon, Warren	4 hr
Nov 30, 3:37 PM EST	Special Marine Warning	PHI		38 min
Nov 30, 3:43 PM EST	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	47 min
Nov 30, 3:53 PM EST	Areal Flood Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	16 hr
Nov 30, 3:53 PM EST	Tornado Warning	PHI	Hunterdon	13 min
Nov 30, 3:58 PM EST	Small Craft Advisory	PHI		56 hr
Nov 30, 4:17 PM EST	Areal Flood Warning	PHI	Camden, Hunterdon, Mercer, Middlesex	10 hr
Nov 30, 4:49 PM EST	Severe Thunderstorm Warning	PHI	Camden, Cumberland, Gloucester, Salem	41 min
Nov 30, 5:05 PM EST	Special Marine Warning	PHI		40 min
Nov 30, 5:29 PM EST	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Somerset	46 min
Nov 30, 5:36 PM EST	River Flood Warning	PHI	Hunterdon, Somerset	7 hr

Nearby

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