Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 70, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 4, 2020, 10:59 PM EDT for 7 counties in New Jersey. It was in force for 34 min. 3 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 4, 2020, 10:59 PM EDT (02:59 UTC)
- Expired
- Jun 4, 2020, 11:33 PM EDT
- In force
- 34 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Ocean County, NJ
The radar
The Dover AFB radar (KDOX), 50 km from the middle of the area, began a volume at 02:58 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 4, 11:08 PM EDT | TSTM WND DMG | Lawnside, NJ | DOWNED TREE ON I-295 SOUTHBOUND AT EXIT 30, PARTIALLY BLOCKING THE RAMP. TIME ESTIMATED FROM RADAR. |
| Jun 4, 11:14 PM EDT | TSTM WND DMG | 1 Nw Gibbsboro, NJ | WIRES DOWN IN THE VOORHEES AREA. TIME ESTIMATED FROM RADAR. |
| Jun 4, 11:25 PM EDT | TSTM WND DMG | Shamong, NJ | MULTIPLE 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 nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 3.0 hours before the alert went out and 142 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.
- Mixed-layer CAPE
- 1848 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1057 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.3
The text
As transmitted.
912
WUUS51 KPHI 050259
SVRPHI
NJC001-005-007-009-011-015-029-050345-
/O.NEW.KPHI.SV.W.0070.200605T0259Z-200605T0345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1059 PM EDT Thu Jun 4 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Atlantic County in southern New Jersey...
Eastern Cumberland County in southern New Jersey...
Central Ocean County in southern New Jersey...
Camden County in southern New Jersey...
Gloucester County in southern New Jersey...
Cape May County in southern New Jersey...
Burlington County in southern New Jersey...
* Until 1145 PM EDT.
* At 1059 PM EDT, severe thunderstorms were located along a line
extending from near West Deptford to Buena to near Bowers, moving
east at 60 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Vineland, Atlantic City, Millville, Ocean City, Cape May,
Cumberland, Cherry Hill, Evesham, Deptford, Voorhees, Medford, West
Deptford, Barnegat, Pleasantville, Glassboro, Lindenwold,
Hammonton, Bellmawr, Somers Point and Ventnor City.
This includes the following highways...
Atlantic City Expressway between mile markers 1 and 44.
Garden State Parkway between mile markers 0 and 68.
Interstate 295 in New Jersey between mile markers 17 and 34.
New Jersey Turnpike near exit 3.
Interstate 76 in New Jersey near mile marker 0.
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.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
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.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3890 7486 3893 7532 3894 7531 3895 7532
3896 7536 3896 7532 3898 7531 3903 7534
3905 7539 3951 7501 3984 7529 4003 7439
3965 7418
TIME...MOT...LOC 0259Z 259DEG 51KT 3979 7521 3953 7498 3901 7540
HAIL...0.75IN
WIND...60MPH
$$
MPS2 follow-up statements
439
WWUS51 KPHI 050326
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1126 PM EDT Thu Jun 4 2020
NJC011-015-050336-
/O.CAN.KPHI.SV.W.0070.000000T0000Z-200605T0345Z/
Cumberland NJ-Gloucester NJ-
1126 PM EDT Thu Jun 4 2020
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CUMBERLAND AND
GLOUCESTER COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3923 7456 3912 7497 3919 7494 3918 7491
3922 7492 3923 7490 3929 7489 3958 7475
3993 7485 4003 7440 3965 7434
TIME...MOT...LOC 0326Z 242DEG 34KT 3992 7477 3961 7468 3922 7487
$$
NJC001-005-007-009-029-050345-
/O.CON.KPHI.SV.W.0070.000000T0000Z-200605T0345Z/
Atlantic NJ-Ocean NJ-Camden NJ-Cape May NJ-Burlington NJ-
1126 PM EDT Thu Jun 4 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT
FOR ATLANTIC...WESTERN OCEAN...EAST CENTRAL CAMDEN...NORTHERN CAPE
MAY AND SOUTHEASTERN BURLINGTON COUNTIES...
At 1126 PM EDT, severe thunderstorms were located along a line
extending from near Medford to near Batsto to near Eldora, moving
northeast at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Atlantic City, Ocean City, Medford, Pleasantville, Hammonton, Somers
Point, Ventnor City, Northfield, Absecon, Tabernacle, Shamong,
Margate City, Egg Harbor City, Presidential Lakes Estates, Weymouth,
Woodbine, Estell Manor, Pemberton, Port Republic and Longport.
This includes the following highways...
Atlantic City Expressway between mile markers 3 and 22.
Garden State Parkway between mile markers 19 and 58.
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.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
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 3923 7456 3912 7497 3919 7494 3918 7491
3922 7492 3923 7490 3929 7489 3958 7475
3993 7485 4003 7440 3965 7434
TIME...MOT...LOC 0326Z 242DEG 34KT 3992 7477 3961 7468 3922 7487
HAIL...0.75IN
WIND...60MPH
$$
MPS790
WWUS51 KPHI 050333
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1133 PM EDT Thu Jun 4 2020
NJC001-005-007-009-029-050342-
/O.CAN.KPHI.SV.W.0070.000000T0000Z-200605T0345Z/
Atlantic NJ-Ocean NJ-Camden NJ-Cape May NJ-Burlington NJ-
1133 PM EDT Thu Jun 4 2020
...THE SEVERE THUNDERSTORM WARNING FOR ATLANTIC...WESTERN OCEAN...
EAST CENTRAL CAMDEN...NORTHERN CAPE MAY AND SOUTHEASTERN BURLINGTON
COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. However, heavy rain is
still possible with these thunderstorms.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3923 7456 3912 7497 3919 7494 3918 7491
3922 7492 3923 7490 3929 7489 3958 7475
3993 7485 4003 7440 3965 7434
TIME...MOT...LOC 0330Z 259DEG 51KT 3993 7470 3962 7461 3923 7480
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 10:07 PM EDT | Special Marine Warning | PHI | 53 min | |
| Jun 4, 10:12 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 33 min |
| Jun 4, 10:31 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 46 min |
| Jun 4, 10:32 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Cumberland, Gloucester, Salem | 42 min |
| Jun 4, 10:52 PM EDT | Special Marine Warning | PHI | 38 min | |
| Jun 5, 12:06 AM EDT | Special Marine Warning | PHI | 54 min | |
| Jun 5, 9:47 AM EDT | Flash Flood Watch | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 7 more | 12 hr |
| Jun 5, 3:24 PM EDT | Special Weather Statement | PHI | Mercer, Middlesex, Monmouth | 36 min |
| Jun 5, 3:57 PM EDT | Special Weather Statement | PHI | Mercer, Middlesex, Monmouth | 33 min |
| Jun 5, 4:36 PM EDT | Special Weather Statement | PHI | Monmouth | 24 min |
| Jun 5, 4:55 PM EDT | Special Weather Statement | PHI | Monmouth, Ocean | 50 min |
| Jun 5, 5:01 PM EDT | Areal Flood Advisory | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean, Somerset | 4 hr |
| Jun 5, 5:19 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Ocean, Salem | 4 hr |
| Jun 5, 5:27 PM EDT | Flash Flood Warning | PHI | Monmouth, Ocean | 3 hr |
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.