Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 209, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 6, 2020, 7:18 AM EDT for Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Delaware. It was in force for 42 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 6, 2020, 7:18 AM EDT (11:18 UTC)
- Expired
- Aug 6, 2020, 8:00 AM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Kent County, DE, New Castle County, DE, Cumberland County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 59 km from the middle of the area, began a volume at 11:20 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
Wallops Is Stn, VA (KWAL), launched 00:00Z, 11.3 hours before the alert went out and 158 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
- 1920 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 772 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
735
WUUS51 KPHI 061118
SVRPHI
DEC001-003-NJC011-033-061200-
/O.NEW.KPHI.SV.W.0209.200806T1118Z-200806T1200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
718 AM EDT Thu Aug 6 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
South central New Castle County in northern Delaware...
Northeastern Kent County in central Delaware...
Central Cumberland County in southern New Jersey...
Southern Salem County in southern New Jersey...
* Until 800 AM EDT.
* At 717 AM EDT, a severe thunderstorm was located over Woodland
Beach, or 11 miles north of Dover, moving northeast at 25 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Vineland, Millville, Bridgeton, Cumberland, Pennsville, Smyrna,
Salem, Laurel Lake, Alloway, Quinton, Greenwich, Shiloh, Newport,
Woodland Beach, Hancocks Bridge, Newport Meadows, Port Penn, Hope
Creek, Fairton and Cedarville.
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3916 7544 3940 7570 3969 7544 3936 7492
TIME...MOT...LOC 1117Z 241DEG 23KT 3932 7551
HAIL...<.75IN
WIND...70MPH
$$
MPS2 follow-up statements
963
WWUS51 KPHI 061142
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
742 AM EDT Thu Aug 6 2020
DEC001-003-061152-
/O.CAN.KPHI.SV.W.0209.000000T0000Z-200806T1200Z/
New Castle DE-Kent DE-
742 AM EDT Thu Aug 6 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL NEW CASTLE AND
NORTHEASTERN KENT COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3956 7523 3939 7496 3935 7494 3922 7529
3944 7549
TIME...MOT...LOC 1142Z 253DEG 28KT 3937 7526
$$
NJC011-033-061200-
/O.CON.KPHI.SV.W.0209.000000T0000Z-200806T1200Z/
Cumberland NJ-Salem NJ-
742 AM EDT Thu Aug 6 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM EDT
FOR CENTRAL CUMBERLAND AND SOUTHEASTERN SALEM COUNTIES...
At 742 AM EDT, a severe thunderstorm was located over Fairton, or
near Bridgeton, moving east at 30 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Vineland, Millville, Bridgeton, Laurel Lake, Greenwich, Shiloh,
Newport, Newport Meadows, Fairton, Cedarville, Seabrook Farms,
Rosenhayn and Olivet.
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3956 7523 3939 7496 3935 7494 3922 7529
3944 7549
TIME...MOT...LOC 1142Z 253DEG 28KT 3937 7526
HAIL...<.75IN
WIND...70MPH
$$
MPS483
WWUS51 KPHI 061155
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
755 AM EDT Thu Aug 6 2020
NJC011-033-061204-
/O.EXP.KPHI.SV.W.0209.000000T0000Z-200806T1200Z/
Cumberland NJ-Salem NJ-
755 AM EDT Thu Aug 6 2020
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CUMBERLAND AND
SOUTHEASTERN SALEM COUNTIES WILL EXPIRE AT 800 AM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However, gusty
winds and heavy rain are still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
A Severe Thunderstorm Warning still remains in effect for portions
of Cumberland county until 8:45 am EDT.
LAT...LON 3956 7523 3939 7496 3935 7494 3922 7529
3944 7549
TIME...MOT...LOC 1153Z 241DEG 23KT 3940 7520
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 3:37 AM EDT | Flash Flood Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 7 more | 44 hr |
| Aug 6, 5:27 AM EDT | Special Marine Warning | PHI | 63 min | |
| Aug 6, 6:58 AM EDT | Special Marine Warning | PHI | 92 min | |
| Aug 6, 7:03 AM EDT | Areal Flood Advisory | PHI | Atlantic, Cumberland, Gloucester, Salem | 3 hr |
| Aug 6, 7:27 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 48 min |
| Aug 6, 7:31 AM EDT | Special Marine Warning | PHI | 59 min | |
| Aug 6, 7:33 AM EDT | Flash Flood Warning | PHI | Cumberland, Salem | 2 hr |
| Aug 6, 7:33 AM EDT | Special Marine Warning | PHI | 57 min | |
| Aug 6, 7:47 AM EDT | Special Marine Warning | PHI | 88 min | |
| Aug 6, 7:52 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 53 min |
| Aug 6, 8:04 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 41 min |
| Aug 6, 8:09 AM EDT | Special Marine Warning | PHI | 66 min | |
| Aug 6, 8:23 AM EDT | Special Marine Warning | PHI | 67 min | |
| Aug 6, 8:34 AM EDT | Special Weather Statement | PHI | Atlantic | 26 min |
| Aug 6, 6:13 AM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 62 min |
| Aug 6, 6:43 AM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 3 hr |
| Aug 6, 6:49 AM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 41 min |
| Aug 6, 7:13 AM EDT | Flash Flood Warning | PHI | Kent, New Castle | 3 hr |
| Aug 6, 7:13 AM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 47 min |
| Aug 6, 7:46 AM EDT | Special Weather Statement | PHI | Sussex | 29 min |
| Aug 6, 8:16 AM EDT | Severe Thunderstorm Warning | PHI | Sussex | 44 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2020Severe Thunderstorm Warnings in Delaware, 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.