Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 68, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 9, 2021, 2:07 PM EDT for Gloucester County, Salem County, New Jersey; New Castle County, Delaware. It was in force for 23 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
- Jun 9, 2021, 2:07 PM EDT (18:07 UTC)
- Expired
- Jun 9, 2021, 2:30 PM EDT
- In force
- 23 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Gloucester County, NJ, Salem County, NJ
The radar
The Philadelphia radar (KDIX), 92 km from the middle of the area, began a volume at 18:11 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.1 hours before the alert went out and 188 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
- 193 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1225 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -75 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
381
WUUS51 KPHI 091807
SVRPHI
DEC003-NJC015-033-091900-
/O.NEW.KPHI.SV.W.0068.210609T1807Z-210609T1900Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
207 PM EDT Wed Jun 9 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern New Castle County in northern Delaware...
Northwestern Salem County in southern New Jersey...
West central Gloucester County in southern New Jersey...
* Until 300 PM EDT.
* At 206 PM EDT, a severe thunderstorm was located over Carneys
Point, or near Wilmington, and is nearly stationary.
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...
Wilmington, Pennsville, Carneys Point, New Castle, Penns Grove,
Woodstown, Swedesboro, Beckett, Delaware Memorial Bridge,
Bellefonte, Edgemoor and Claymont.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 295 in New Jersey between mile markers 0 and 10.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3969 7554 3980 7549 3974 7525 3959 7539
TIME...MOT...LOC 1806Z 306DEG 4KT 3970 7546
HAIL...0.75IN
WIND...60MPH
$$
Gorse2 follow-up statements
675
WWUS51 KPHI 091818
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
218 PM EDT Wed Jun 9 2021
DEC003-091827-
/O.CAN.KPHI.SV.W.0068.000000T0000Z-210609T1900Z/
New Castle DE-
218 PM EDT Wed Jun 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEW CASTLE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3971 7550 3972 7548 3974 7547 3979 7543
3977 7537 3974 7525 3959 7539 3968 7553
TIME...MOT...LOC 1817Z 301DEG 4KT 3969 7542
$$
NJC015-033-091900-
/O.CON.KPHI.SV.W.0068.000000T0000Z-210609T1900Z/
Salem NJ-Gloucester NJ-
218 PM EDT Wed Jun 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR NORTHWESTERN SALEM AND WEST CENTRAL GLOUCESTER COUNTIES...
At 217 PM EDT, a severe thunderstorm was located over Carneys Point,
moving southeast at 5 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...
Wilmington, Pennsville, Carneys Point, Penns Grove, Woodstown,
Swedesboro, Beckett and Delaware Memorial Bridge.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 295 in New Jersey between mile markers 0 and 10.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
LAT...LON 3971 7550 3972 7548 3974 7547 3979 7543
3977 7537 3974 7525 3959 7539 3968 7553
TIME...MOT...LOC 1817Z 301DEG 4KT 3969 7542
HAIL...0.75IN
WIND...60MPH
$$
Gorse817
WWUS51 KPHI 091830
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
230 PM EDT Wed Jun 9 2021
NJC015-033-091840-
/O.CAN.KPHI.SV.W.0068.000000T0000Z-210609T1900Z/
Salem NJ-Gloucester NJ-
230 PM EDT Wed Jun 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SALEM AND WEST
CENTRAL GLOUCESTER COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
LAT...LON 3971 7550 3972 7548 3974 7547 3979 7543
3977 7537 3974 7525 3959 7539 3968 7553
TIME...MOT...LOC 1828Z 306DEG 4KT 3968 7540
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 8:40 PM EDT | Special Marine Warning | PHI | 65 min | |
| Jun 9, 1:46 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jun 9, 1:48 PM EDT | Special Weather Statement | PHI | Salem | 27 min |
| Jun 9, 1:52 PM EDT | Special Weather Statement | PHI | Atlantic | 23 min |
| Jun 9, 2:14 PM EDT | Special Weather Statement | PHI | Salem | 31 min |
| Jun 9, 2:21 PM EDT | Flash Flood Warning | PHI | Cumberland, Gloucester, Salem | 73 min |
| Jun 9, 2:47 PM EDT | Special Marine Warning | PHI | 58 min | |
| Jun 9, 3:32 PM EDT | Special Weather Statement | PHI | Burlington | 28 min |
| Jun 9, 3:48 PM EDT | Special Marine Warning | PHI | 57 min | |
| Jun 9, 3:49 PM EDT | Flash Flood Warning | PHI | Burlington | 3 hr |
| Jun 9, 3:51 PM EDT | Special Weather Statement | PHI | Hunterdon | 24 min |
| Jun 9, 5:32 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Monmouth | 28 min |
| Jun 9, 6:46 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jun 9, 6:50 PM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 87 min |
| Jun 9, 7:42 PM EDT | Special Marine Warning | PHI | 63 min | |
| Jun 8, 8:15 PM EDT | Special Weather Statement | PHI | Sussex | 45 min |
| Jun 9, 7:54 AM EDT | River Flood Warning | PHI | New Castle | 5 hr |
| Jun 9, 1:35 PM EDT | Special Weather Statement | PHI | New Castle | 25 min |
| Jun 9, 2:26 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 64 min |
| Jun 9, 2:28 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 62 min |
| Jun 9, 3:11 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 64 min |
| Jun 9, 3:24 PM EDT | Areal Flood Advisory | PHI | Sussex | 3 hr |
| Jun 9, 4:32 PM EDT | Areal Flood Advisory | PHI | Sussex | 108 min |
| Jun 9, 4:37 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 27 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2021Severe Thunderstorm Warnings in Delaware, 2021Every severe thunderstorm warning in 2021
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.