Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 268, NWS Philadelphia/Mount Holly

August 27, 20205 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 27, 2020, 9:28 PM EDT for 5 counties in New Jersey. It was in force for 47 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
Aug 27, 2020, 9:28 PM EDT (01:28 UTC)
Expired
Aug 27, 2020, 10:15 PM EDT
In force
47 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), 34 km from the middle of the area, began a volume at 01:30 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 1.5 hours before the alert went out and 150 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-pSkew-T log-p diagram, Brookhaven, NY at 00:00Z on 2020-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 709 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2020-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -140 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
709 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
777 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
-140 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.6

Open this sounding in Storm Lab

The text

As transmitted.

394 
WUUS51 KPHI 280128
SVRPHI
NJC021-023-025-029-035-280215-
/O.NEW.KPHI.SV.W.0268.200828T0128Z-200828T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
928 PM EDT Thu Aug 27 2020

The National Weather Service in Mount Holly NJ has issued a

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

* Until 1015 PM EDT.

* At 927 PM EDT, a severe thunderstorm was located over Twin Rivers,
  or 14 miles south of New Brunswick, 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...
  Long Branch, Asbury Park, Lakewood, Howell, East Brunswick, South
  Brunswick, Marlboro, Manalapan, Ewing, Tinton Falls, Princeton,
  Jamesburg, Manasquan, Hightstown, Point Pleasant Beach, Cranbury,
  Farmingdale, Roosevelt, Rocky Hill and Mantoloking.

This includes the following highways...
 New Jersey Turnpike between exits 8A and 9.
 Interstate 195 in New Jersey between mile markers 14 and 34.
 Interstate 295 in New Jersey between mile markers 64 and 72.
 Garden State Parkway between mile markers 92 and 107.

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 4026 7480 4044 7472 4026 7388 4004 7400
TIME...MOT...LOC 0127Z 289DEG 35KT 4029 7449 

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

JEO
2 follow-up statements
092 
WWUS51 KPHI 280139
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
939 PM EDT Thu Aug 27 2020

NJC035-280149-
/O.CAN.KPHI.SV.W.0268.000000T0000Z-200828T0215Z/
Somerset NJ-
939 PM EDT Thu Aug 27 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SOMERSET COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4008 7398 4004 7400 4021 7462 4039 7453
      4028 7397
TIME...MOT...LOC 0139Z 289DEG 35KT 4025 7434 

$$

NJC021-023-025-029-280215-
/O.CON.KPHI.SV.W.0268.000000T0000Z-200828T0215Z/
Ocean NJ-Mercer NJ-Monmouth NJ-Middlesex NJ-
939 PM EDT Thu Aug 27 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR NORTHEASTERN OCEAN...EAST CENTRAL MERCER...MONMOUTH AND
SOUTHWESTERN MIDDLESEX COUNTIES...

At 939 PM EDT, a severe thunderstorm was located over Manalapan, or
17 miles south of New Brunswick, 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...
Long Branch, Asbury Park, Lakewood, Howell, Marlboro, Manalapan,
Tinton Falls, Jamesburg, Manasquan, Hightstown, Point Pleasant Beach,
Cranbury, Farmingdale, Roosevelt, Mantoloking, Allenwood, East
Freehold, West Freehold, Adelphia and Clarksburg.

This includes the following highways...
 New Jersey Turnpike between exits 8A and 9.
 Interstate 195 in New Jersey between mile markers 14 and 34.
 Garden State Parkway between mile markers 92 and 107.

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 4008 7398 4004 7400 4021 7462 4039 7453
      4028 7397
TIME...MOT...LOC 0139Z 289DEG 35KT 4025 7434 

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

JEO
766 
WWUS51 KPHI 280206
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
Issued by National Weather Service Baltimore MD/Washington DC
1006 PM EDT Thu Aug 27 2020

NJC021-023-025-029-280215-
/O.EXP.KPHI.SV.W.0268.000000T0000Z-200828T0215Z/
Ocean NJ-Mercer NJ-Monmouth NJ-Middlesex NJ-
1006 PM EDT Thu Aug 27 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OCEAN...
SOUTHEASTERN MERCER...MONMOUTH AND SOUTHWESTERN MIDDLESEX COUNTIES
WILL EXPIRE AT 1015 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

LAT...LON 4008 7398 4004 7400 4021 7462 4039 7453
      4028 7397
TIME...MOT...LOC 0205Z 289DEG 35KT 4018 7409 

$$

LFR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 8:13 PM EDTSevere Thunderstorm WarningPHIHunterdon, Somerset, Warren47 min
Aug 27, 8:24 PM EDTSpecial Weather StatementPHIMiddlesex, Somerset51 min
Aug 27, 8:29 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Monmouth, Somerset46 min
Aug 27, 8:55 PM EDTSpecial Marine WarningPHI95 min
Aug 27, 9:13 PM EDTSpecial Weather StatementPHIHunterdon, Mercer, Middlesex, Monmouth, Somerset47 min
Aug 28, 3:05 PM EDTSpecial Marine WarningPHI85 min
Aug 28, 3:41 PM EDTSpecial Weather StatementPHISalem34 min
Aug 28, 3:52 PM EDTSevere Thunderstorm WarningPHICumberland, Gloucester, Salem53 min
Aug 28, 3:53 PM EDTSpecial Marine WarningPHI67 min
Aug 28, 4:07 PM EDTSpecial Marine WarningPHI53 min
Aug 28, 4:17 PM EDTSevere Thunderstorm WarningPHICape May43 min
Aug 28, 4:29 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Mercer61 min
Aug 28, 4:39 PM EDTSevere Thunderstorm WarningPHICamden, Cumberland, Gloucester, Salem66 min
Aug 28, 4:49 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean56 min
Aug 28, 4:55 PM EDTSpecial Marine WarningPHI95 min
Aug 28, 5:13 PM EDTSpecial Marine WarningPHI92 min
Aug 28, 5:28 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more47 min
Aug 28, 5:37 PM EDTSpecial Marine WarningPHI83 min
Aug 28, 5:51 PM EDTSpecial Marine WarningPHI84 min
Aug 28, 6:53 PM EDTSpecial Marine WarningPHI64 min
Aug 28, 7:55 PM EDTSpecial Marine WarningPHI65 min

Nearby

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