Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 39, NWS Philadelphia/Mount Holly

April 21, 20209 counties in New Jersey; Bucks County, Montgomery County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 21, 2020, 1:59 PM EDT for 9 counties in New Jersey; Bucks County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 61 min. 45 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: Apr 21, 2020, 1:59 PM EDT (17:59 UTC)
Expired: Apr 21, 2020, 3:00 PM EDT
In force: 61 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Burlington County, NJ, Camden County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Somerset County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA

What was reported inside it

Time	Report	Where	Remark
Apr 21, 2:00 PM EDT	HAIL 0.25	Feasterville-Trevose, PA	REPORTED AT FEASTERVILLE-TREVOSE.
Apr 21, 2:02 PM EDT	TSTM WND DMG	3 E Lawrenceville, NJ	SEVERAL TREES DOWN NEAR QUAKERBRIDGE MALL. TIME ESTIMATED FROM RADAR.
Apr 21, 2:07 PM EDT	HAIL 0.25	Bensalem, PA	PEA SIZED HAIL REPORTED IN BENSALEM, PA.
Apr 21, 2:07 PM EDT	HAIL 0.25	Langhorne, PA	PEA SIZED HAIL REPORTED IN LANGHORNE, PA.
Apr 21, 2:10 PM EDT	TSTM WND GST 44	2 Ssw Palmyra, NJ	NJ MESONET MEASURES 44 MPH.
Apr 21, 2:15 PM EDT	HAIL 0.25	Cherry Hill Twp, NJ	PEA SIZE HAIL REPORTED IN CHERRY HILL.
Apr 21, 2:15 PM EDT	HAIL 0.5	2 Se Lawrence Twp, NJ	REPORT FROM MPING: HALF-INCH 0.50 INCHES.
Apr 21, 2:16 PM EDT	TSTM WND DMG	1 Wsw Prospect Park, NJ	DOWNED WIRES FROM STRONG WINDS. TIME ESTIMATED FROM RADAR.
Apr 21, 2:20 PM EDT	TSTM WND DMG	1 E Willingboro, NJ	DOWNED TREE ON WIRES NEAR NEPTUNE LANE. TIME ESTIMATED FROM RADAR.
Apr 21, 2:20 PM EDT	HAIL 0.25	Delran, NJ	PEA SIZE HAIL REPORTED IN DELRAN, NJ.
Apr 21, 2:23 PM EDT	TSTM WND DMG	1 E Willingboro, NJ	DOWNED TREE ON WIRES NEAR NEPTUNE LANE.
Apr 21, 2:24 PM EDT	TSTM WND DMG	Medford Twp., NJ	1-INCH TREE LIMBS BROKEN AND SHINGLES BLOWN OFF.
Apr 21, 2:25 PM EDT	HAIL 0.25	Hightstown, NJ
Apr 21, 2:30 PM EDT	TSTM WND GST 60	Jackson, NJ	SEVERAL TREE LIMBS DOWNED.
Apr 21, 2:30 PM EDT	HAIL 0.25	Spotswood, NJ	PEA SIZE HAIL IN SPOTSWOOD, NJ.
Apr 21, 2:33 PM EDT	TSTM WND GST 56	2 Ese Fort Dix, NJ	REPORTED AT MCGUIRE AIR FORCE BASE.
Apr 21, 2:35 PM EDT	TSTM WND DMG	1 Sw Medford, NJ	TREES DOWN IN MEDFORD, NJ. TIME ESTIMATED FROM RADAR.
Apr 21, 2:35 PM EDT	TSTM WND GST 44	1 Ese Lumberton Twp, NJ	NJ MESONET MEASURES A 44 MPH WIND GUST.
Apr 21, 2:35 PM EDT	TSTM WND GST 49	Tabernacle, NJ	NJ MESONET SITE REPORTS A 49 MPH WIND GUST.
Apr 21, 2:36 PM EDT	TSTM WND DMG	Pemberton, NJ	SEVERAL REPORTS OF TREES AND POWER LINES DOWN BETWEEN PEMBERTON AND BROWNS MILLS. TIME ESTIMATED FROM RADAR.
Apr 21, 2:36 PM EDT	HAIL 0.75	Helmetta, NJ	TIME ESTIMATED FROM RADAR.
Apr 21, 2:38 PM EDT	TSTM WND DMG	3 Ne Perrineville, NJ	DOWNED TREE AND WIRES. TIME ESTIMATED FROM RADAR.
Apr 21, 2:38 PM EDT	TSTM WND GST 54	2 Sw Lumberton Twp, NJ	REPORTED AT KVAY.
Apr 21, 2:40 PM EDT	TSTM WND DMG	Browns Mills, NJ	SEVERAL REPORTS OF TREE LIMBS AND POWER LINES DOWN IN THE BROWNS MILLS AREA. TIME ESTIMATED FROM RADAR.
Apr 21, 2:45 PM EDT	TSTM WND GST 46	Port Monmouth, NJ	NJ MESONET REPORTS A 46 MPH WIND GUST.
Apr 21, 2:48 PM EDT	MARINE TSTM WIND 40	8 S Seagate, NY	35 KT GUST - 18 FT ELEVATION
Apr 21, 2:48 PM EDT	TSTM WND DMG	1 Wsw Freehold, NJ	DOWNED UTILITY POLE ON BUSINESS STATE HIGHWAY 33 NEAR WEST MAIN STREET. TIME ESTIMATED FROM RADAR.
Apr 21, 2:48 PM EDT	HAIL 0.25	Cliffwood Beach, NJ	PEA SIZE HAIL REPORTED.
Apr 21, 2:49 PM EDT	TSTM WND GST 51	Lakehurst Maxfield Fiel, NJ	51 MPH WIND GUST MEASURED AT KNEL.
Apr 21, 2:50 PM EDT	TSTM WND DMG	Freehold, NJ	SEVERAL REPORTS OF TREE LIMBS AND POWER LINES DOWN.
Apr 21, 2:51 PM EDT	TSTM WND DMG	Greentree, NJ	DOWNED WIRES ON NJ70 IN CHERRY HILL.
Apr 21, 2:52 PM EDT	HAIL 0.75	Freehold, NJ
Apr 21, 2:53 PM EDT	HAIL 0.75	Manalapan Twp, NJ
Apr 21, 2:54 PM EDT	HAIL 0.5	3 Nw Howell, NJ	REPORT FROM MPING: HALF-INCH (0.50 IN.).
Apr 21, 2:58 PM EDT	TSTM WND DMG	Manasquan, NJ	DAMAGE TO TRAILERS AND SHEDS AT SEA GIRT TRAINING CENTER, TIME ESTIMATED FROM RADAR.
Apr 21, 3:00 PM EDT	TSTM WND DMG	1 N Brick, NJ	TREES AND WIRES INTO HOMES NEAR BRICK NJ, TIME ESTIMATED FROM RADAR.
Apr 21, 3:00 PM EDT	TSTM WND DMG	2 Ne Leisure Village Ea, NJ	HOOPER AVE & CEDAR BRIDGE AVE ARE CLOSED DUE TO WIRES DOWN.
Apr 21, 3:00 PM EDT	TSTM WND GST 57	2 Ne Leisure Village Ea, NJ	NJ MESONET SITE REPORTS A 57 MPH WIND GUST.
Apr 21, 3:03 PM EDT	TSTM WND DMG	2 Ene Toms River, NJ	MULTIPLE TREES UPROOTED IN TOMS RIVER NEAR VAUGHN AVE AND N TUNESBROOK DR. TIME ESTIMATED FROM RADAR.
Apr 21, 3:04 PM EDT	TSTM WND DMG	1 Nw Brielle, NJ	DOWNED UTILITY POLE ON STATE HIGHWAY 35 SOUTH OF LAKEWOOD ROAD. TIME ESTIMATED FROM RADAR.
Apr 21, 3:04 PM EDT	TSTM WND DMG	3 N Ocean Gate, NJ	TREE DOWN ON STANDISH DR. IN BELLCREST AREA OF TOMS RIVER. TIME ESTIMATED FROM RADAR.
Apr 21, 3:04 PM EDT	TSTM WND DMG	Manasquan, NJ	SEVERAL REPORTS OF TREES AND WIRES DOWN NEAR AND WEST OF MANASQUAN. TIME ESTIMATED FROM RADAR.
Apr 21, 3:04 PM EDT	HAIL 0.5	1 E Brielle, NJ	REPORT FROM MPING: HALF-INCH (0.50 IN.).
Apr 21, 3:08 PM EDT	TSTM WND DMG	Toms River, NJ	SEVERAL REPORTS OF POWER LINES AND TREE LIMBS DOWN IN THE TOMS RIVER AREA. TIME ESTIMATED FROM RADAR.
Apr 21, 3:08 PM EDT	TSTM WND DMG	Toms River, NJ	SEVERAL REPORTS OF TREES AND WIRES DOWN IN TOMS RIVER. 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
Apr 21, 1:27 PM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.0 hours before the alert went out and 126 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: 3 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 846 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 296 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

806 
WUUS51 KPHI 211759
SVRPHI
NJC005-007-019-021-023-025-027-029-035-PAC017-091-101-211900-
/O.NEW.KPHI.SV.W.0039.200421T1759Z-200421T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
159 PM EDT Tue Apr 21 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Ocean County in southern New Jersey...
  Southeastern Morris County in northern New Jersey...
  Southeastern Hunterdon County in northwestern New Jersey...
  Northwestern Camden County in southern New Jersey...
  Mercer County in central New Jersey...
  Burlington County in southern New Jersey...
  Somerset County in northern New Jersey...
  Monmouth County in central New Jersey...
  Middlesex County in northern New Jersey...
  Southeastern Montgomery County in southeastern Pennsylvania...
  Southeastern Bucks County in southeastern Pennsylvania...
  Central Philadelphia County in southeastern Pennsylvania...

* Until 300 PM EDT.

* At 154 PM EDT, severe thunderstorms were located along a line
  extending from near Monsey to Belle Mead to Kensington, moving east
  at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Philadelphia, Toms River, Trenton, Camden, New Brunswick, Perth
  Amboy, Long Branch, Morristown, Asbury Park, Somerville, Sandy
  Hook, Somerset, Edison, Lakewood, Middletown, Old Bridge, Bensalem,
  Jackson, Howell and East Brunswick.

People attending Covid-19 Drive through testing should seek safe
shelter immediately!

This includes the following highways...
 Garden State Parkway between mile markers 63 and 134.
 Interstate 195 in New Jersey between mile markers 0 and 34.
 Interstate 287 in New Jersey between mile markers 0 and 20, and
between mile markers 25 and 53.
 Interstate 295 in New Jersey between mile markers 35 and 76.
 Interstate 78 in New Jersey between mile markers 32 and 42.
 Interstate 80 in New Jersey between mile markers 42 and 47.
 Interstate 95 in Pennsylvania between mile markers 22 and 40.
 New Jersey Turnpike between exits 4 and 13.
 Pennsylvania Turnpike between exits 351 and 353.
 Interstate 76 in Pennsylvania between mile markers 339 and 342.

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 3997 7397 3961 7402 3999 7524 4048 7477
      4101 7435 4100 7433 4100 7430 4090 7427
      4091 7433 4075 7436 4067 7446 4065 7440
      4060 7446 4060 7421 4050 7428 4047 7427
      4041 7398 4048 7402 4047 7400 4043 7397
TIME...MOT...LOC 1754Z 287DEG 37KT 4114 7409 4045 7466 3998 7510 

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

Deal

2 follow-up statements

553 
WWUS51 KPHI 211830
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
230 PM EDT Tue Apr 21 2020

NJC007-019-027-PAC091-101-211840-
/O.CAN.KPHI.SV.W.0039.000000T0000Z-200421T1900Z/
Morris NJ-Hunterdon NJ-Camden NJ-Montgomery PA-Philadelphia PA-
230 PM EDT Tue Apr 21 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORRIS...
SOUTHEASTERN HUNTERDON...NORTHWESTERN CAMDEN...SOUTHEASTERN
MONTGOMERY AND CENTRAL PHILADELPHIA 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 500 PM EDT for
southern, central and northern New Jersey...and southeastern
Pennsylvania.

LAT...LON 3989 7398 3962 7402 3990 7495 4060 7445
      4061 7441 4065 7441 4060 7421 4050 7428
      4046 7426 4044 7420 4045 7418 4041 7398
      4048 7402 4048 7401 4043 7397
TIME...MOT...LOC 1830Z 302DEG 36KT 4104 7379 4035 7436 3988 7480 

$$

NJC005-021-023-025-029-035-PAC017-211900-
/O.CON.KPHI.SV.W.0039.000000T0000Z-200421T1900Z/
Ocean NJ-Mercer NJ-Burlington NJ-Somerset NJ-Monmouth NJ-
Middlesex NJ-Bucks PA-
230 PM EDT Tue Apr 21 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR OCEAN...SOUTHEASTERN MERCER...CENTRAL BURLINGTON...SOUTHEASTERN
SOMERSET...MONMOUTH...MIDDLESEX AND SOUTHEASTERN BUCKS COUNTIES...

At 230 PM EDT, severe thunderstorms were located along a line
extending from White Plains to near Yorketown to Medford, moving
southeast at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Toms River, New Brunswick, Perth Amboy, Long Branch, Asbury Park,
Sandy Hook, Somerset, Edison, Lakewood, Middletown, Old Bridge,
Jackson, Howell, East Brunswick, South Brunswick, Sayreville, North
Brunswick, Marlboro, Manalapan and Medford.

This includes the following highways...
 Garden State Parkway between mile markers 64 and 136.
 Interstate 195 in New Jersey between mile markers 0 and 34.
 Interstate 287 in New Jersey between mile markers 0 and 8.
 Interstate 295 in New Jersey between mile markers 43 and 65.
 New Jersey Turnpike between exits 5 and 13.

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 3989 7398 3962 7402 3990 7495 4060 7445
      4061 7441 4065 7441 4060 7421 4050 7428
      4046 7426 4044 7420 4045 7418 4041 7398
      4048 7402 4048 7401 4043 7397
TIME...MOT...LOC 1830Z 302DEG 36KT 4104 7379 4035 7436 3988 7480 

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

Deal

800 
WWUS51 KPHI 211851
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
251 PM EDT Tue Apr 21 2020

NJC021-023-035-PAC017-211900-
/O.CAN.KPHI.SV.W.0039.000000T0000Z-200421T1900Z/
Mercer NJ-Somerset NJ-Middlesex NJ-Bucks PA-
251 PM EDT Tue Apr 21 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MERCER...
SOUTHEASTERN SOMERSET...MIDDLESEX AND SOUTHEASTERN BUCKS 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 500 PM EDT for
southern, central and northern New Jersey.

LAT...LON 3962 7402 3984 7474 4018 7457 4025 7448
      4027 7441 4040 7425 4044 7424 4045 7418
      4041 7398 4048 7402 4048 7401 4043 7397
      3989 7398
TIME...MOT...LOC 1850Z 287DEG 37KT 4098 7353 4029 7410 3982 7454 

$$

NJC005-025-029-211900-
/O.CON.KPHI.SV.W.0039.000000T0000Z-200421T1900Z/
Ocean NJ-Burlington NJ-Monmouth NJ-
251 PM EDT Tue Apr 21 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR OCEAN...NORTHEASTERN BURLINGTON AND MONMOUTH COUNTIES...

At 250 PM EDT, severe thunderstorms were located along a line
extending from near Stamford to Tinton Falls to Chatsworth, moving
east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Toms River, Long Branch, Asbury Park, Sandy Hook, Lakewood,
Middletown, Jackson, Howell, Marlboro, Manalapan, Barnegat, Tinton
Falls, Holmdel, Red Bank, Beachwood, Matawan, Tabernacle, Manasquan,
Highlands and Point Pleasant Beach.

People attending Covid-19 Drive through testing should seek safe
shelter immediately!

This includes the following highways...
 Garden State Parkway between mile markers 64 and 120.
 Interstate 195 in New Jersey between mile markers 9 and 34.

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 3962 7402 3984 7474 4018 7457 4025 7448
      4027 7441 4040 7425 4044 7424 4045 7418
      4041 7398 4048 7402 4048 7401 4043 7397
      3989 7398
TIME...MOT...LOC 1850Z 287DEG 37KT 4098 7353 4029 7410 3982 7454 

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

Deal

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 3:34 AM EDT	Freeze Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	28 hr
Apr 21, 11:44 AM EDT	Coastal Flood Statement	PHI	Ocean	5 hr
Apr 21, 12:23 PM EDT	Special Weather Statement	PHI	Monmouth	37 min
Apr 21, 1:04 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	26 min
Apr 21, 1:28 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Hunterdon, Mercer, Middlesex, Morris and 1 more	32 min
Apr 21, 1:38 PM EDT	Special Weather Statement	PHI	Cumberland, Salem	52 min
Apr 21, 1:49 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	56 min
Apr 21, 2:04 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	56 min
Apr 21, 2:17 PM EDT	Special Marine Warning	PHI		58 min
Apr 21, 2:24 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	66 min
Apr 21, 2:55 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	35 min
Apr 21, 3:04 PM EDT	Special Marine Warning	PHI		116 min
Apr 21, 12:48 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Montgomery	42 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020 Severe Thunderstorm Warnings in Pennsylvania, 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.