Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 77, NWS Philadelphia/Mount Holly

June 27, 20205 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 27, 2020, 4:17 PM EDT for 5 counties in New Jersey. It was in force for 58 min. 14 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: Jun 27, 2020, 4:17 PM EDT (20:17 UTC)
Expired: Jun 27, 2020, 5:15 PM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 51 km from the middle of the area, began a volume at 20:16 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.

What was reported inside it

Time	Report	Where	Remark
Jun 27, 4:17 PM EDT	TSTM WND DMG	South Brunswick, NJ	TREES AND WIRES DOWN IN SOUTH BRUNSWICK. TIME ESTIMATED FROM RADAR.
Jun 27, 4:24 PM EDT	TSTM WND DMG	1 S East Windsor Twp, NJ	SEVERAL REPORTS OF DOWNED POWER LINES IN THE EAST WINDSOR TWP AREA. TIME ESTIMATED FROM RADAR.
Jun 27, 4:25 PM EDT	TSTM WND DMG	Applegarth, NJ	TREES AND WIRES DOWN NEAR ROUTE 33 IN APPLEGARTH. TIME ESTIMATED BY RADAR.
Jun 27, 4:28 PM EDT	TSTM WND DMG	2 Sw Old Bridge, NJ	DOWNED TREE AND WIRES NEAR JOHN WALL ROAD. TIME ESTIMATED FROM RADAR.
Jun 27, 4:30 PM EDT	TSTM WND DMG	Bairdsville, NJ	WIRES DOWN ON LAMB LANE IN MANALAPAN, NJ. TIME ESTIMATED FROM RADAR.
Jun 27, 4:32 PM EDT	TSTM WND DMG	1 Wsw Parlin, NJ	TREES AND WIRES DOWN NEAR WASHINGTON ROAD. TIME ESTIMATED FROM RADAR.
Jun 27, 4:36 PM EDT	TSTM WND DMG	3 S Englishtown, NJ	DOWNED TREES AND POWER LINES IN VICINITY OF WOODWARD ROAD NEAR STATE HIGHWAY 33. TIME ESTIMATED FROM RADAR.
Jun 27, 4:42 PM EDT	TSTM WND DMG	West Freehold, NJ	TREES AND WIRES DOWN IN THE WEST FREEHOLD AREA. TIME ESTIMATED FROM RADAR.
Jun 27, 4:49 PM EDT	TSTM WND DMG	Jerseyville, NJ	WIRES DOWN ON FAIRFIELD ROAD NEAR ROUTE 33. TIME ESTIMATED FROM RADAR.
Jun 27, 4:56 PM EDT	TSTM WND DMG	1 Ssw Red Bank, NJ	DOWNED TREES AND POWER LINES NEAR SHREWSBURY AVENUE AND BANK STREET. TIME ESTIMATED FROM RADAR.
Jun 27, 5:00 PM EDT	TSTM WND DMG	Manasquan, NJ	DOWNED TREES AND WIRES NEAR MINERVA AVENUE. TIME ESTIMATED FROM RADAR.
Jun 27, 5:01 PM EDT	TSTM WND DMG	Manasquan, NJ	WIRES DOWN IN MANASQUAN. TIME ESTIMATED FROM RADAR.
Jun 27, 5:05 PM EDT	MARINE TSTM WIND 52	1 Ene Manasquan, NJ	NJ WEATHERNET SITE NJ52.
Jun 27, 5:12 PM EDT	MARINE TSTM WIND 43	Mantoloking, NJ	HADS SENSOR.

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
Jun 27, 3:16 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.3 hours before the alert went out and 125 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: 1675 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

279 
WUUS51 KPHI 272017
SVRPHI
NJC021-023-025-029-035-272115-
/O.NEW.KPHI.SV.W.0077.200627T2017Z-200627T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
417 PM EDT Sat Jun 27 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Ocean County in southern New Jersey...
  Mercer County in central New Jersey...
  Southern Somerset County in northern New Jersey...
  Monmouth County in central New Jersey...
  Middlesex County in northern New Jersey...

* Until 515 PM EDT.

* At 416 PM EDT, severe thunderstorms were located along a line
  extending from near North Brunswick Township to Plainsboro Center,
  moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Law enforcement. Several reports of trees and wires down 
           have been received from Lehigh, Northampton, and 
           Hunterdon Counties with the passage of these storms.

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

* Locations impacted include...
  New Brunswick, Long Branch, Asbury Park, Sandy Hook, Somerset,
  Lakewood, Middletown, Old Bridge, Howell, East Brunswick, South
  Brunswick, Sayreville, North Brunswick, Marlboro, Manalapan, Ewing,
  Tinton Falls, Holmdel, Princeton and Red Bank.

This includes the following highways...
 New Jersey Turnpike between exits 8A and 10.
 Interstate 195 in New Jersey between mile markers 11 and 34.
 Interstate 295 in New Jersey between mile markers 64 and 75.
 Garden State Parkway between mile markers 90 and 126.

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.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 3999 7399 4029 7487 4048 7472 4050 7428
      4046 7426 4044 7420 4046 7418 4041 7401
      4041 7399 4048 7402 4048 7401 4043 7397
TIME...MOT...LOC 2016Z 289DEG 41KT 4046 7454 4033 7461 

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

CMS

3 follow-up statements

190 
WWUS51 KPHI 272042
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
442 PM EDT Sat Jun 27 2020

NJC035-272051-
/O.CAN.KPHI.SV.W.0077.000000T0000Z-200627T2115Z/
Somerset NJ-
442 PM EDT Sat Jun 27 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN SOMERSET COUNTY 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 800 PM EDT for
central, northern and southern New Jersey.

LAT...LON 3999 7399 4027 7480 4035 7469 4037 7439
      4046 7426 4044 7420 4046 7418 4041 7401
      4041 7398 4046 7400 4043 7397
TIME...MOT...LOC 2041Z 293DEG 39KT 4037 7419 4021 7432 

$$

NJC021-023-025-029-272115-
/O.CON.KPHI.SV.W.0077.000000T0000Z-200627T2115Z/
Ocean NJ-Mercer NJ-Monmouth NJ-Middlesex NJ-
442 PM EDT Sat Jun 27 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHEASTERN OCEAN...SOUTHEASTERN MERCER...MONMOUTH AND SOUTHERN
MIDDLESEX COUNTIES...

At 441 PM EDT, severe thunderstorms were located along a line
extending from Holmdel to near West Freehold, moving southeast at 45
mph.

HAZARD...60 mph wind gusts.

SOURCE...Law enforcement. Reports of trees and power lines down have 
         been received from Hunterdon and Somerset Counties with 
         these storms.

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

Locations impacted include...
Long Branch, Asbury Park, Sandy Hook, Lakewood, Middletown, Old
Bridge, Howell, Marlboro, Manalapan, Ewing, Tinton Falls, Holmdel,
Princeton, Red Bank, Matawan, Jamesburg, Manasquan, Hightstown,
Highlands and Point Pleasant Beach.

This includes the following highways...
 New Jersey Turnpike between exits 8A and 9.
 Interstate 195 in New Jersey between mile markers 11 and 34.
 Interstate 295 in New Jersey between mile markers 65 and 71.
 Garden State Parkway between mile markers 90 and 122.

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.

Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3999 7399 4027 7480 4035 7469 4037 7439
      4046 7426 4044 7420 4046 7418 4041 7401
      4041 7398 4046 7400 4043 7397
TIME...MOT...LOC 2041Z 293DEG 39KT 4037 7419 4021 7432 

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

CMS

633 
WWUS51 KPHI 272055
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
455 PM EDT Sat Jun 27 2020

NJC021-023-025-029-272115-
/O.CON.KPHI.SV.W.0077.000000T0000Z-200627T2115Z/
Ocean NJ-Mercer NJ-Monmouth NJ-Middlesex NJ-
455 PM EDT Sat Jun 27 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHEASTERN OCEAN...SOUTHEASTERN MERCER...MONMOUTH AND SOUTH
CENTRAL MIDDLESEX COUNTIES...

At 454 PM EDT, severe thunderstorms were located along a line
extending from near Red Bank to near Farmingdale, moving east at 45
mph.

HAZARD...60 mph wind gusts.

SOURCE...Law enforcement. Several reports of downed trees and power 
         lines have been received from Somerset and Monmouth 
         Counties with the passage of these storms.

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

Locations impacted include...
Long Branch, Asbury Park, Sandy Hook, Lakewood, Middletown, Howell,
Marlboro, Manalapan, Tinton Falls, Holmdel, Red Bank, Jamesburg,
Manasquan, Hightstown, Highlands, Point Pleasant Beach, Cranbury,
Farmingdale, Roosevelt and Mantoloking.

This includes the following highways...
 New Jersey Turnpike near exit 8A.
 Interstate 195 in New Jersey between mile markers 11 and 34.
 Garden State Parkway between mile markers 90 and 114.

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.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3999 7399 4024 7471 4037 7439 4032 7420
      4044 7413 4041 7403 4041 7398 4046 7400
      4043 7397
TIME...MOT...LOC 2054Z 291DEG 38KT 4032 7408 4017 7415 

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

CMS

404 
WWUS51 KPHI 272113
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
513 PM EDT Sat Jun 27 2020

NJC021-023-025-029-272122-
/O.EXP.KPHI.SV.W.0077.000000T0000Z-200627T2115Z/
Ocean NJ-Mercer NJ-Monmouth NJ-Middlesex NJ-
513 PM EDT Sat Jun 27 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OCEAN...
SOUTHEASTERN MERCER...MONMOUTH AND SOUTH CENTRAL MIDDLESEX COUNTIES
WILL EXPIRE AT 515 PM EDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will 
be allowed to expire.  However, gusty winds and heavy rain are still 
possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central, northern and southern New Jersey.

LAT...LON 3999 7399 4024 7471 4037 7439 4032 7420
      4044 7413 4041 7403 4041 7398 4046 7400
      4043 7397
TIME...MOT...LOC 2112Z 289DEG 41KT 4026 7384 4011 7392 

$$

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 3:01 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Warren	44 min
Jun 27, 3:32 PM EDT	Areal Flood Advisory	PHI	Warren	3 hr
Jun 27, 3:37 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset, Warren	53 min
Jun 27, 4:33 PM EDT	Special Marine Warning	PHI		87 min
Jun 27, 4:51 PM EDT	Special Weather Statement	PHI	Mercer	24 min
Jun 27, 5:12 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	2 hr
Jun 27, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Monmouth, Ocean	48 min
Jun 27, 5:27 PM EDT	Special Marine Warning	PHI		63 min
Jun 27, 5:47 PM EDT	Special Weather Statement	PHI	Mercer	13 min
Jun 27, 6:14 PM EDT	Special Weather Statement	PHI	Cumberland	31 min
Jun 27, 6:54 PM EDT	Special Weather Statement	PHI	Cape May	51 min
Jun 27, 6:58 PM EDT	Special Marine Warning	PHI		32 min
Jun 27, 7:25 PM EDT	Special Marine Warning	PHI		30 min
Jun 27, 7:25 PM EDT	Special Marine Warning	PHI		65 min
Jun 27, 7:27 PM EDT	Special Weather Statement	PHI	Ocean	33 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 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.