Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 227, NWS Philadelphia/Mount Holly

August 12, 2020Monmouth County, Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 12, 2020, 12:45 PM EDT for Monmouth County, Ocean County, New Jersey. It was in force for 45 min. 6 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
Aug 12, 2020, 12:45 PM EDT (16:45 UTC)
Expired
Aug 12, 2020, 1:30 PM EDT
In force
45 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Monmouth County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 20 km from the middle of the area, began a volume at 16:47 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

TimeReportWhereRemark
Aug 12, 12:54 PM EDTTSTM WND DMG2 Ne Leisure Village Ea, NJDOWNED TREE AND WIRES NEAR PINE STREET IN BRICK TOWNSHIP. TIME ESTIMATED FROM RADAR.
Aug 12, 12:56 PM EDTTSTM WND DMG1 Ne Leisure Village Ea, NJDOWNED TREE AND WIRES NEAR CENTRAL AVENUE IN BRICK TOWNSHIP. TIME ESTIMATED FROM RADAR.
Aug 12, 1:00 PM EDTHAIL 0.251 W Leisure Village Eas, NJ
Aug 12, 1:05 PM EDTTSTM WND DMG1 Ene Lakehurst, NJSEVERAL REPORTS OF DOWNED POWER LINES SOUTH OF LAKEWOOD TOWNSHIP. TIME ESTIMATED FROM RADAR.
Aug 12, 1:14 PM EDTTSTM WND DMG3 Ese Lakehurst, NJDOWNED TREE LIMBS AND POWER LINES NEAR BURNSIDE STREET IN THE LAKEHURST AREA. TIME ESTIMATED FROM RADAR.
Aug 12, 1:30 PM EDTTSTM WND DMG2 Wnw Toms River, NJSEVERAL REPORTS OF DOWNED POWER LINES IN THE SILVER RIDGE AREA. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 4.8 hours before the alert went out and 146 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 12:00Z on 2020-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1221 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2020-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.1939Sfc1 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
1221 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
921 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
58 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.4

Open this sounding in Storm Lab

The text

As transmitted.

569 
WUUS51 KPHI 121645
SVRPHI
NJC025-029-121730-
/O.NEW.KPHI.SV.W.0227.200812T1645Z-200812T1730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1245 PM EDT Wed Aug 12 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Ocean County in southern New Jersey...
  Southeastern Monmouth County in central New Jersey...

* Until 130 PM EDT.

* At 1245 PM EDT, a severe thunderstorm was located over Leisure
  Village East, or near Toms River, moving southeast at 15 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, Asbury Park, Lakewood, Jackson, Howell, Tinton Falls,
  Beachwood, Manasquan, Point Pleasant Beach, Seaside Heights,
  Lakehurst, Farmingdale, Mantoloking, Allenwood, Cassville, Brick
  Township, Collingwood Park, Pine Ridge At Crestwood, Leisure
  Village West-Pine Lake Park and Leisure Village.

This includes the following highways...
 Interstate 195 in New Jersey between mile markers 24 and 34.
 Garden State Parkway between mile markers 76 and 103.

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 this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

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

&&

LAT...LON 4004 7450 4025 7413 4022 7396 3978 7407
TIME...MOT...LOC 1645Z 298DEG 12KT 4005 7417 

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

CMS
1 follow-up statement
879 
WWUS51 KPHI 121706
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
106 PM EDT Wed Aug 12 2020

NJC025-029-121730-
/O.CON.KPHI.SV.W.0227.000000T0000Z-200812T1730Z/
Ocean NJ-Monmouth NJ-
106 PM EDT Wed Aug 12 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM EDT
FOR NORTHERN OCEAN AND SOUTHEASTERN MONMOUTH COUNTIES...

At 106 PM EDT, a severe thunderstorm was located over Brick 
Township, or near Toms River, moving southeast at 10 mph. Several 
power outages have been reported in Brick Township in the past 15 
minutes.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Toms River, Asbury Park, Lakewood, Jackson, Howell, Tinton Falls,
Beachwood, Manasquan, Point Pleasant Beach, Seaside Heights,
Lakehurst, Farmingdale, Mantoloking, Allenwood, Cassville, Brick
Township, Collingwood Park, Pine Ridge At Crestwood, Leisure Village
West-Pine Lake Park and Leisure Village.

This includes the following highways...
 Interstate 195 in New Jersey between mile markers 24 and 34.
 Garden State Parkway between mile markers 76 and 103.

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 this storm. 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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4004 7450 4025 7413 4022 7396 3978 7407
TIME...MOT...LOC 1706Z 311DEG 7KT 4003 7412 

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

CMS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 12:06 PM EDTSpecial Weather StatementPHIMonmouth24 min
Aug 12, 12:16 PM EDTSpecial Weather StatementPHIBurlington29 min
Aug 12, 12:33 PM EDTSevere Thunderstorm WarningPHIBurlington42 min
Aug 12, 12:43 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Mercer, Monmouth, Ocean and 1 more3 hr
Aug 12, 1:12 PM EDTFlash Flood WarningPHIBurlington3 hr
Aug 12, 1:12 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Monmouth, Ocean48 min
Aug 12, 1:25 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean50 min
Aug 12, 1:54 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester51 min
Aug 12, 1:57 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Ocean48 min
Aug 12, 2:40 PM EDTFlash Flood WarningPHIBurlington, Camden, Gloucester3 hr
Aug 12, 2:42 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean25 min
Aug 12, 2:44 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester46 min
Aug 12, 3:12 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester, Salem29 min
Aug 12, 3:54 PM EDTSpecial Marine WarningPHI53 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.