Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 220, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2020, 6:41 PM EDT for 5 counties in New Jersey. It was in force for 49 min. 4 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 7, 2020, 6:41 PM EDT (22:41 UTC)
- Expired
- Aug 7, 2020, 7:30 PM EDT
- In force
- 49 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Atlantic County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 79 km from the middle of the area, began a volume at 22:42 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 7, 6:50 PM EDT | TSTM WND DMG | Woodstown, NJ | SOME TREES DOWN IN THE WOODSTOWN AREA. TIME ESTIMATED FROM RADAR. |
| Aug 7, 7:00 PM EDT | TSTM WND DMG | 2 Sw Glendora, NJ | DOWNED TREE, POLE AND WIRES ON NJ 41 BOTH DIRECTIONS NORTH OF GOOD INTENT ROAD IN DEPTFORD TOWNSHIP. ALL LANES CLOSED. TIME ESTIMATED FROM RADAR. |
| Aug 7, 7:05 PM EDT | TSTM WND GST 89 | 2 Nne Seabrook Farms, NJ | RUTGERS AGRICULTURAL RESEARCH AND EXTENSION CENTER AT UPPER DEERFIELD, NJ. |
| Aug 7, 7:17 PM EDT | TSTM WND GST 69 | 4 Nnw Seabrook Farms, NJ | 69 MPH THUNDERSTORM WIND GUST MEASURED ON ROUTE 77 AT MILE MARKER 9. |
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 12:00Z, 10.7 hours before the alert went out and 178 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
- 248 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 738 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
131
WUUS51 KPHI 072241
SVRPHI
NJC001-007-011-015-033-072330-
/O.NEW.KPHI.SV.W.0220.200807T2241Z-200807T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
641 PM EDT Fri Aug 7 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
West central Atlantic County in southern New Jersey...
Cumberland County in southern New Jersey...
Salem County in southern New Jersey...
Central Camden County in southern New Jersey...
Gloucester County in southern New Jersey...
* Until 730 PM EDT.
* At 641 PM EDT, severe thunderstorms were located along a line
extending from Gibbstown to near Woodstown to near Newport Meadows,
moving southeast at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Vineland, Millville, Bridgeton, Deptford, West Deptford, Glassboro,
Lindenwold, Pennsville, Woodbury, Pitman, Clayton, Berlin,
Paulsboro, Salem, Buena, Laurel Lake, Woodstown, Alloway, Woodbury
Heights and Quinton.
This includes the following highways...
New Jersey Turnpike between exits 1 and 2.
Interstate 295 in New Jersey between mile markers 7 and 21.
Atlantic City Expressway between mile markers 34 and 44.
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, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3972 7542 3984 7533 3984 7492 3944 7487
3920 7521 3926 7538 3932 7541 3937 7545
3946 7555 3956 7555 3961 7552
TIME...MOT...LOC 2241Z 309DEG 22KT 3982 7526 3961 7528 3944 7546
HAIL...<.75IN
WIND...60MPH
$$
RobertsonThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:15 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Warren | 3 hr |
| Aug 7, 5:25 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Salem | 3 hr |
| Aug 7, 5:43 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester | 4 hr |
| Aug 7, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 48 min |
| Aug 7, 6:00 PM EDT | Tornado Warning | PHI | Gloucester, Salem | 30 min |
| Aug 7, 6:08 PM EDT | Areal Flood Advisory | PHI | Cumberland, Gloucester, Salem | 3 hr |
| Aug 7, 6:16 PM EDT | Areal Flood Advisory | PHI | Mercer | 2 hr |
| Aug 7, 6:24 PM EDT | Special Marine Warning | PHI | 66 min | |
| Aug 7, 6:39 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Hunterdon, Mercer | 27 min |
| Aug 7, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Cumberland, Gloucester, Salem | 48 min |
| Aug 7, 7:24 PM EDT | Special Marine Warning | PHI | 66 min | |
| Aug 7, 7:25 PM EDT | Flash Flood Warning | PHI | Atlantic, Cape May, Cumberland, Gloucester | 4 hr |
| Aug 7, 7:28 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more | 62 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.