Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 258, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 25, 2020, 6:56 PM EDT for Cape May County, Cumberland County, New Jersey. It was in force for 43 min. 2 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 25, 2020, 6:56 PM EDT (22:56 UTC)
- Expired
- Aug 25, 2020, 7:39 PM EDT
- In force
- 43 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Cape May County, NJ, Cumberland County, NJ
The radar
The Dover AFB radar (KDOX), 51 km from the middle of the area, began a volume at 22:57 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 |
|---|---|---|---|
| Aug 25, 7:00 PM EDT | TSTM WND GST 65 | Fortescue, NJ | NJ MESONET GUST. |
| Aug 25, 7:00 PM EDT | MARINE TSTM WIND 65 | Fortescue, NJ | NJ MESONET GUST. |
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 |
|---|---|---|---|
| Aug 25, 3:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.9 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
- 1429 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 814 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.5
The text
As transmitted.
903
WUUS51 KPHI 252256
SVRPHI
NJC009-011-260015-
/O.NEW.KPHI.SV.W.0258.200825T2256Z-200826T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
656 PM EDT Tue Aug 25 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Cumberland County in southern New Jersey...
Cape May County in southern New Jersey...
* Until 815 PM EDT.
* At 655 PM EDT, a severe thunderstorm was located over Newport, or 9
miles southwest of Millville, moving southeast at 35 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters. Quarter size hail has been
reported with this storm, and radar continues to indicate
a high likelihood of damaging winds.
IMPACT...Minor damage to vehicles is possible. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
* Locations impacted include...
Millville, Cape May, North Wildwood, Laurel Lake, Wildwood Crest,
Woodbine, Sea Isle City, Avalon, West Cape May, Stone Harbor,
Newport, Cape May Court House, Leesburg, Scotch Bonnet,
Dennisville, Bricksboro, Fortesque, Eldora, North Cape May and
Mauricetown.
This includes Garden State Parkway between mile markers 0 and 18.
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.
&&
LAT...LON 3926 7531 3939 7515 3912 7459 3887 7494
TIME...MOT...LOC 2255Z 313DEG 31KT 3928 7516
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
$$
JEO3 follow-up statements
012
WWUS51 KPHI 252312
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
712 PM EDT Tue Aug 25 2020
NJC009-011-260015-
/O.CON.KPHI.SV.W.0258.000000T0000Z-200826T0015Z/
Cumberland NJ-Cape May NJ-
712 PM EDT Tue Aug 25 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR SOUTH CENTRAL CUMBERLAND AND SOUTHWESTERN CAPE MAY COUNTIES...
At 711 PM EDT, a severe thunderstorm was located near Bivalve, or 14
miles south of Millville, moving southeast at 35 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters. Quarter size hail has been
reported with this storm. In addition, a wind gust to 65
mph was recently measured in Fortescue. This storm has a
history of producing hail and damaging winds.
IMPACT...Minor damage to vehicles is possible. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Cape May, North Wildwood, Wildwood Crest, Sea Isle City, Avalon, West
Cape May, Stone Harbor, Cape May Court House, Scotch Bonnet, Port
Norris, Diamond Beach, Green Creek, Goshen, Rio Grande, Bivalve,
North Cape May, Villas, West Wildwood, Erma and Whitesboro-Burleigh.
This includes Garden State Parkway between mile markers 0 and 14.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3919 7524 3927 7508 3909 7463 3887 7494
TIME...MOT...LOC 2311Z 313DEG 31KT 3918 7503
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
$$
JEO333
WWUS51 KPHI 252326
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
726 PM EDT Tue Aug 25 2020
NJC011-252335-
/O.CAN.KPHI.SV.W.0258.000000T0000Z-200826T0015Z/
Cumberland NJ-
726 PM EDT Tue Aug 25 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CUMBERLAND
COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southern New Jersey.
LAT...LON 3911 7515 3918 7501 3907 7466 3887 7494
TIME...MOT...LOC 2325Z 313DEG 31KT 3910 7491
$$
NJC009-260015-
/O.CON.KPHI.SV.W.0258.000000T0000Z-200826T0015Z/
Cape May NJ-
726 PM EDT Tue Aug 25 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR SOUTHWESTERN CAPE MAY COUNTY...
At 725 PM EDT, a severe thunderstorm was located near Green Creek, or
10 miles north of Cape May, moving southeast at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated. This storm is showing signs of weakening
but remains capable of producing hail and damaging winds.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Cape May, North Wildwood, Wildwood Crest, Avalon, West Cape May,
Stone Harbor, Cape May Court House, Scotch Bonnet, Diamond Beach,
Green Creek, Rio Grande, North Cape May, Villas, West Wildwood, Erma
and Whitesboro-Burleigh.
This includes Garden State Parkway between mile markers 0 and 12.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3911 7515 3918 7501 3907 7466 3887 7494
TIME...MOT...LOC 2325Z 313DEG 31KT 3910 7491
HAIL...1.00IN
WIND...60MPH
$$
JEO417
WWUS51 KPHI 252339
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
739 PM EDT Tue Aug 25 2020
NJC009-252349-
/O.CAN.KPHI.SV.W.0258.000000T0000Z-200826T0015Z/
Cape May NJ-
739 PM EDT Tue Aug 25 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CAPE MAY COUNTY
IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southern New Jersey.
LAT...LON 3911 7515 3918 7501 3907 7466 3887 7494
TIME...MOT...LOC 2339Z 313DEG 31KT 3903 7481
$$
JEOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 4:43 PM EDT | Special Weather Statement | PHI | Sussex | 47 min |
| Aug 25, 4:49 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 26 min |
| Aug 25, 5:35 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 40 min |
| Aug 25, 5:36 PM EDT | Special Marine Warning | PHI | 54 min | |
| Aug 25, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 18 min |
| Aug 25, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 50 min |
| Aug 25, 6:13 PM EDT | Special Weather Statement | PHI | Middlesex, Morris, Somerset | 47 min |
| Aug 25, 6:33 PM EDT | Special Marine Warning | PHI | 57 min | |
| Aug 25, 7:28 PM EDT | Special Marine Warning | PHI | 24 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.