Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 298, NWS Philadelphia/Mount Holly

November 15, 2020New Castle County, Delaware; 4 counties in Pennsylvania; 10 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 15, 2020, 7:50 PM EST for New Castle County, Delaware; 4 counties in Pennsylvania; 10 counties in New Jersey. It was in force for 70 min. 29 reports 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: Nov 15, 2020, 7:50 PM EST (00:50 UTC)
Expired: Nov 15, 2020, 9:00 PM EST
In force: 70 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties New Castle County, DE, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 38 km from the middle of the area, began a volume at 00:53 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
Nov 15, 7:50 PM EST	TSTM WND DMG	1 E Newtown Square, PA	MPING REPORT OF DOWNED TREE LIMBS AND WIRES. TIME ESTIMATED FROM RADAR.
Nov 15, 7:52 PM EST	TSTM WND DMG	West Conshohocken, PA	SEVERAL REPORTS OF DOWNED TREE LIMBS IN LOWER MERION TWP. TIME ESTIMATED FROM RADAR.
Nov 15, 7:54 PM EST	TSTM WND DMG	Fort Washington, PA	DOWNED TREE AND WIRES ON AMBLER ROAD NEAR ELLERSLIE AVENUE. TIME ESTIMATED FROM RADAR.
Nov 15, 7:54 PM EST	TSTM WND DMG	Green Ridge, PA	MPING REPORT OF TREE LIMBS DOWN. TIME ESTIMATED FROM RADAR.
Nov 15, 7:58 PM EST	TSTM WND DMG	1 Nne Holiday Hills, DE	NAAMANS ROAD NEAR FOULK ROAD IS CLOSED DUE TO DOWNED WIRES, TIME ESTIMATED FROM RADAR.
Nov 15, 8:00 PM EST	TSTM WND DMG	1 Ene Willow Grove, PA	DOWNED LARGE TREE LIMB BROUGHT WIRES DOWN ONTO TERWOOD ROAD. TIME ESTIMATED FROM RADAR.
Nov 15, 8:00 PM EST	TSTM WND DMG	Willow Grove, PA	SEVERAL TREES DOWN IN THE AREA. TIME ESTIMATED FROM RADAR.
Nov 15, 8:02 PM EST	TSTM WND DMG	1 S Belmont, PA	MPING REPORT OF TREE LIMBS DOWN. TIME ESTIMATED FROM RADAR.
Nov 15, 8:05 PM EST	TSTM WND GST 55	1 W Logan Twp., NJ	LOGAN TWP NJWXNET GAUGE.
Nov 15, 8:05 PM EST	TSTM WND GST 60	Lower Alloways Creek, NJ	NJ WEATHER NET SITE NJ74.
Nov 15, 8:06 PM EST	TSTM WND DMG	1 Ssw Philadelphia, PA	MPING REPORT OF DOWNED TREE LIMBS. TIME ESTIMATED FROM RADAR.
Nov 15, 8:10 PM EST	TSTM WND DMG	Tacony, PA	MPING REPORT OF TREES AND POWER POLES DOWN. TIME ESTIMATED FROM RADAR.
Nov 15, 8:10 PM EST	TSTM WND GST 44	2 Ssw Palmyra, NJ	CORRECTS PREVIOUS TSTM WND GST REPORT FROM 2 SSW PALMYRA. PENNSAUKEN NJWXNET GAUGE.
Nov 15, 8:10 PM EST	TSTM WND GST 61	2 Ssw Palmyra, NJ	PENNSAUKEN NJWXNET GAUGE.
Nov 15, 8:18 PM EST	TSTM WND DMG	Mullica Hill, NJ	MPING REPORT OF TREES AND POWER LINES DOWN. TIME ESTIMATED FROM RADAR.
Nov 15, 8:20 PM EST	TSTM WND DMG	2 Nne Merchantville, NJ	DOWNED TREE ON US 130 SOUTHBOUND RAMP FROM NJ 90 (PENNSAUKEN). ALL LANES CLOSED. TIME ESTIMATED FROM RADAR.
Nov 15, 8:22 PM EST	TSTM WND GST 56	Northeast Philadelphia, PA	KPNE.
Nov 15, 8:24 PM EST	TSTM WND GST 60	1 Ene Westampton Twp, NJ	NWS METEOROLOGISTS ESTIMATED 60 MPH WINDS WITH SQUALL PASSAGE.
Nov 15, 8:30 PM EST	TSTM WND GST 42	2 Sw Rancocas, NJ	CORRECTS PREVIOUS TSTM WND GST REPORT FROM 2 SW RANCOCAS. MOORESTOWN NJWXNET GAUGE.
Nov 15, 8:30 PM EST	TSTM WND GST 43	2 Se Jacksonville, NJ	CORRECTS PREVIOUS TSTM WND GST REPORT FROM 2 SE JACKSONVILLE. COLUMBUS NJWXNET GAUGE.
Nov 15, 8:30 PM EST	TSTM WND GST 59	2 Se Jacksonville, NJ	COLUMBUS NJWXNET GAUGE.
Nov 15, 8:30 PM EST	TSTM WND GST 60	2 Sw Rancocas, NJ	MOORESTOWN NJWXNET GAUGE.
Nov 15, 8:40 PM EST	TSTM WND GST 58	Mcguire Afb (Kwri), NJ
Nov 15, 8:54 PM EST	TSTM WND GST 59	Mantoloking, NJ	HADS GAUGE.
Nov 15, 8:54 PM EST	TSTM WND GST 59	Mantoloking, NJ	HADS SENSOR. GUST WAS IN ADVANCE OF THE CONVECTION.
Nov 15, 9:00 PM EST	TSTM WND DMG	1 E Lakewood, NJ	SEVERAL REPORTS OF DOWNED TREE LIMBS AND WIRES IN THE AREA. TIME ESTIMATED FROM RADAR.
Nov 15, 9:00 PM EST	TSTM WND GST 55	3 Sw Mullica Twp, NJ	MULLICA TWP NJWXNET GAUGE.
Nov 15, 9:06 PM EST	TSTM WND DMG	Point Pleasant, NJ	DOWNED TREE LIMBS AND WIRES IN THE AREA. TIME ESTIMATED FROM RADAR.
Nov 15, 9:06 PM EST	TSTM WND DMG	Toms River, NJ	SEVERAL REPORTS OF DOWNED TREES AND WIRES IN THE AREA. TIME ESTIMATED FROM RADAR.

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
Nov 15, 5:35 PM EST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.8 hours before the alert went out and 204 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 633 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 741 m²/s²
0-3 km storm-relative helicity: 834 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

699 
WUUS51 KPHI 160050
SVRPHI
DEC003-NJC001-005-007-009-011-015-021-025-029-033-PAC017-045-091-101-
160200-
/O.NEW.KPHI.SV.W.0298.201116T0050Z-201116T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
750 PM EST Sun Nov 15 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern New Castle County in northern Delaware...
  Ocean County in southern New Jersey...
  Camden County in southern New Jersey...
  South central Mercer County in central New Jersey...
  Atlantic County in southern New Jersey...
  Cumberland County in southern New Jersey...
  Salem County in southern New Jersey...
  Gloucester County in southern New Jersey...
  Cape May County in southern New Jersey...
  Burlington County in southern New Jersey...
  Southern Monmouth County in central New Jersey...
  Southeastern Montgomery County in southeastern Pennsylvania...
  Southeastern Bucks County in southeastern Pennsylvania...
  Philadelphia County in southeastern Pennsylvania...
  Delaware County in southeastern Pennsylvania...

* Until 900 PM EST.

* At 749 PM EST, intense showers and embedded severe thunderstorms 
  were located along a line extending from near Chalfont to Chelsea 
  to Port Penn to Morgnec, moving northeast at 65 mph.

  This line may contain little or no lightning. Do not wait until 
  you hear thunder before taking cover.

  HAZARD...60 mph wind gusts.

  SOURCE...Trained weather spotters.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Philadelphia, Toms River, Camden, Wilmington, Vineland, Atlantic
  City, Millville, Bridgeton, Ocean City, Gloucester City, Cape May,
  Cumberland, Lakewood, Cherry Hill, Bensalem, Jackson, Evesham,
  Mount Laurel, Chester and Willingboro.

This includes the following highways...
 New Jersey Turnpike between exits 1 and 7A.
 Pennsylvania Turnpike between mile markers 331 and 343, and between
mile markers 345 and 359.
 Northeast Extension between mile markers 21 and 22.
 Interstate 95 in Pennsylvania between mile markers 0 and 40.
 Interstate 95 in Delaware between mile markers 4 and 23.
 Interstate 76 in Pennsylvania between mile markers 330 and 351.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 195 in New Jersey between mile markers 15 and 34.
 Interstate 295 in New Jersey between mile markers 0 and 59.
 Interstate 676 in Pennsylvania between mile markers 0 and 1.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Interstate 476 in Pennsylvania between mile markers 0 and 19.
 Garden State Parkway between mile markers 0 and 98.
 Atlantic City Expressway between mile markers 0 and 44.

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.

For your protection move to an interior room on the lowest floor of a
building.

This is a DANGEROUS SITUATION. These storms are producing wind 
damage. SEEK SHELTER NOW inside a sturdy structure and stay away 
from windows! 

&&

LAT...LON 4018 7396 3961 7412 3886 7493 3963 7573
      3978 7561 4016 7528
TIME...MOT...LOC 0049Z 246DEG 57KT 4025 7517 3986 7550 3952 7560 3926
7602

HAIL...<.75IN
WIND...60MPH
 
$$

Gorse

3 follow-up statements

201 
WWUS51 KPHI 160120
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
820 PM EST Sun Nov 15 2020

DEC003-PAC091-160129-
/O.CAN.KPHI.SV.W.0298.000000T0000Z-201116T0200Z/
New Castle DE-Montgomery PA-
820 PM EST Sun Nov 15 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN NEW CASTLE AND
SOUTHEASTERN MONTGOMERY COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM EST for
northern Delaware...southern and central New Jersey...and
southeastern Pennsylvania.

LAT...LON 4014 7397 3961 7412 3886 7493 3950 7559
      3952 7558 4017 7498 4018 7410
TIME...MOT...LOC 0119Z 249DEG 59KT 4024 7471 4005 7484 3978 7509 3951
7526 3945 7549

$$

NJC001-005-007-009-011-015-021-025-029-033-PAC017-045-101-160200-
/O.CON.KPHI.SV.W.0298.000000T0000Z-201116T0200Z/
Ocean NJ-Camden NJ-Mercer NJ-Atlantic NJ-Cumberland NJ-Salem NJ-
Gloucester NJ-Cape May NJ-Burlington NJ-Monmouth NJ-Bucks PA-
Philadelphia PA-Delaware PA-
820 PM EST Sun Nov 15 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EST
FOR OCEAN...CAMDEN...SOUTH CENTRAL MERCER...ATLANTIC...CUMBERLAND...
SALEM...GLOUCESTER...CAPE MAY...BURLINGTON...SOUTHERN MONMOUTH...
SOUTHEASTERN BUCKS...CENTRAL PHILADELPHIA AND SOUTHEASTERN DELAWARE
COUNTIES...

At 819 PM EST, intense showers and embedded severe thunderstorms 
were located along a line extending from near Mercerville-Hamilton 
Square to near Burlington to Turnersville to near Seabrook Farms to 
near Hope Creek, moving east at 65 mph.

This line has a history of producing areas of wind damage.

This line may contain little or no lightning. Do not wait until you 
hear thunder before taking cover.

HAZARD...60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Philadelphia, Toms River, Camden, Vineland, Atlantic City, Millville,
Bridgeton, Ocean City, Gloucester City, Cape May, Cumberland,
Lakewood, Cherry Hill, Bensalem, Jackson, Evesham, Mount Laurel,
Willingboro, Deptford and Voorhees.

This includes the following highways...
 New Jersey Turnpike between exits 1 and 7A.
 Pennsylvania Turnpike between mile markers 350 and 359.
 Interstate 95 in Pennsylvania between mile markers 14 and 40.
 Interstate 76 in Pennsylvania between mile markers 347 and 351.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 195 in New Jersey between mile markers 13 and 34.
 Interstate 295 in New Jersey between mile markers 12 and 59.
 Interstate 676 in Pennsylvania near mile marker 1.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Garden State Parkway between mile markers 0 and 98.
 Atlantic City Expressway between mile markers 0 and 44.

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.

For your protection move to an interior room on the lowest floor of a
building.

This is a DANGEROUS SITUATION. These storms are producing wind 
damage. SEEK SHELTER NOW inside a sturdy structure and stay away 
from windows.
 
&&

LAT...LON 4014 7397 3961 7412 3886 7493 3950 7559
      3952 7558 4017 7498 4018 7410
TIME...MOT...LOC 0119Z 249DEG 59KT 4024 7471 4005 7484 3978 7509 3951
7526 3945 7549

HAIL...<.75IN
WIND...60MPH
 
$$

Gorse

195 
WWUS51 KPHI 160149
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
849 PM EST Sun Nov 15 2020

NJC021-PAC017-045-101-160158-
/O.CAN.KPHI.SV.W.0298.000000T0000Z-201116T0200Z/
Mercer NJ-Bucks PA-Philadelphia PA-Delaware PA-
849 PM EST Sun Nov 15 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MERCER...
SOUTHEASTERN BUCKS...CENTRAL PHILADELPHIA AND SOUTHEASTERN DELAWARE
COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM EST for
southern and central New Jersey.

LAT...LON 4014 7397 3961 7412 3886 7493 3931 7540
      4018 7450 4018 7410
TIME...MOT...LOC 0148Z 255DEG 54KT 4035 7417 4017 7430 3990 7455 3963
7472 3946 7491

$$

NJC001-005-007-009-011-015-025-029-033-160200-
/O.CON.KPHI.SV.W.0298.000000T0000Z-201116T0200Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Ocean NJ-Camden NJ-Gloucester NJ-
Cape May NJ-Burlington NJ-Monmouth NJ-
849 PM EST Sun Nov 15 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EST
FOR ATLANTIC...CUMBERLAND...EAST CENTRAL SALEM...OCEAN...SOUTHEASTERN
CAMDEN...SOUTHEASTERN GLOUCESTER...CAPE MAY...BURLINGTON AND SOUTHERN
MONMOUTH COUNTIES...

At 848 PM EST, intense showers and some embedded severe 
thunderstorms were located along a line extending from Holmdel to 
Vista Center to Presidential Lakes to near Hammonton to near Mizpah, 
moving east at 60 mph.

This line has a history of producing areas of wind damage.

This line may contain little or no lightning. Do not wait until you 
hear thunder before taking cover.

HAZARD...60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Toms River, Vineland, Atlantic City, Millville, Bridgeton, Ocean
City, Cape May, Cumberland, Lakewood, Jackson, Barnegat,
Pleasantville, Hammonton, Beachwood, Somers Point, Ventnor City,
Brigantine, Northfield, Absecon and Berlin.

This includes the following highways...
 Interstate 195 in New Jersey between mile markers 13 and 34.
 Garden State Parkway between mile markers 0 and 98.
 Atlantic City Expressway between mile markers 0 and 38.

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.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4014 7397 3961 7412 3886 7493 3931 7540
      4018 7450 4018 7410
TIME...MOT...LOC 0148Z 255DEG 54KT 4035 7417 4017 7430 3990 7455 3963
7472 3946 7491

HAIL...<.75IN
WIND...60MPH
 
$$

Gorse

182 
WWUS51 KPHI 160159
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
859 PM EST Sun Nov 15 2020

NJC001-005-007-009-011-015-025-029-033-160207-
/O.EXP.KPHI.SV.W.0298.000000T0000Z-201116T0200Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Ocean NJ-Camden NJ-Gloucester NJ-
Cape May NJ-Burlington NJ-Monmouth NJ-
859 PM EST Sun Nov 15 2020

...THE SEVERE THUNDERSTORM WARNING FOR ATLANTIC...CUMBERLAND...EAST
CENTRAL SALEM...OCEAN...SOUTHEASTERN CAMDEN...SOUTHEASTERN
GLOUCESTER...CAPE MAY...BURLINGTON AND SOUTHERN MONMOUTH COUNTIES
WILL EXPIRE AT 900 PM EST...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible behind these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 1100 PM EST for 
southern and central New Jersey. A severe thunderstorm warning 
remains in effect for the souther portion of the warning area, SE of 
a roughly Dover to St.Michaels line.

LAT...LON 4014 7397 3961 7412 3886 7493 3931 7540
      4018 7450 4018 7410
TIME...MOT...LOC 0157Z 246DEG 57KT 4035 7417 4017 7430 3990 7455 3963
7472 3946 7491

$$

NC

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 15, 7:40 PM EST	Severe Thunderstorm Warning	PHI	Kent, New Castle, Sussex	80 min
Nov 15, 8:57 PM EST	Severe Thunderstorm Warning	PHI	Kent, Sussex	63 min
Nov 15, 11:02 PM EST	Coastal Flood Statement	PHI	Sussex	3 hr
Nov 15, 7:31 PM EST	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	74 min
Nov 15, 8:12 PM EST	Special Marine Warning	PHI		63 min
Nov 15, 8:39 PM EST	Special Marine Warning	PHI		2 hr
Nov 15, 8:43 PM EST	Severe Thunderstorm Warning	PHI	Monmouth	47 min
Nov 15, 8:54 PM EST	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean	51 min
Nov 15, 9:53 PM EST	Small Craft Advisory	PHI		27 hr
Nov 16, 3:20 PM EST	Gale Watch	PHI		13 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020 Severe Thunderstorm Warnings in Pennsylvania, 2020 Severe Thunderstorm Warnings in Delaware, 2020 Every severe thunderstorm warning 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.