Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 317, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 25, 2021, 7:34 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey; Delaware County, Philadelphia County, Pennsylvania. It was in force for 26 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
- Oct 25, 2021, 7:34 PM EDT (23:34 UTC)
- Expired
- Oct 25, 2021, 8:00 PM EDT
- In force
- 26 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 65 km from the middle of the area, began a volume at 23:37 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, 11.6 hours before the alert went out and 220 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1230 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 213 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
567
WUUS51 KPHI 252334
SVRPHI
NJC005-007-015-PAC045-101-260015-
/O.NEW.KPHI.SV.W.0317.211025T2334Z-211026T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
734 PM EDT Mon Oct 25 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Camden County in southern New Jersey...
North central Gloucester County in southern New Jersey...
West central Burlington County in southern New Jersey...
Southern Philadelphia County in southeastern Pennsylvania...
East central Delaware County in southeastern Pennsylvania...
* Until 815 PM EDT.
* At 734 PM EDT, a severe thunderstorm was located over Woodbury
Heights, or near Gloucester City, moving north 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...
Philadelphia, Camden, Gloucester City, Deptford, West Deptford,
Bellmawr, Yeadon, Woodbury, Palmyra, Paulsboro, Westville, Woodbury
Heights, National Park, Brooklawn, Audubon Park, Wissinoming,
Germantown, Center City, South Philadelphia and Golden Triangle.
This includes the following highways...
New Jersey Turnpike near exit 3.
Interstate 95 in Pennsylvania between mile markers 13 and 30.
Interstate 76 in Pennsylvania between mile markers 338 and 351.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 18 and 30.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3976 7509 3977 7525 3999 7524 4001 7521
4003 7524 4005 7524 4003 7498
TIME...MOT...LOC 2334Z 191DEG 33KT 3981 7517
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JEO2 follow-up statements
885
WWUS51 KPHI 252350
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
750 PM EDT Mon Oct 25 2021
NJC015-PAC045-252359-
/O.CAN.KPHI.SV.W.0317.000000T0000Z-211026T0015Z/
Gloucester NJ-Delaware PA-
750 PM EDT Mon Oct 25 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL GLOUCESTER AND
EAST CENTRAL DELAWARE COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3983 7506 3990 7516 3998 7518 3999 7516
4004 7516 4003 7498
TIME...MOT...LOC 2349Z 270DEG 33KT 3994 7512
$$
NJC005-007-PAC101-260015-
/O.CON.KPHI.SV.W.0317.000000T0000Z-211026T0015Z/
Camden NJ-Burlington NJ-Philadelphia PA-
750 PM EDT Mon Oct 25 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR NORTHWESTERN CAMDEN...WEST CENTRAL BURLINGTON AND CENTRAL
PHILADELPHIA COUNTIES...
At 749 PM EDT, a severe thunderstorm was located over Camden, moving
east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Philadelphia, Camden, Gloucester City, Bellmawr, Palmyra, Westville,
Brooklawn, Audubon Park, Wissinoming, Center City, Golden Triangle,
Tacony, Ben Franklin Bridge, Kensington, Cherry Hill Mall,
Erlton-Ellisburg, Pennsauken, Cinnaminson, Collingswood and
Haddonfield.
This includes the following highways...
New Jersey Turnpike near exit 3.
Interstate 95 in Pennsylvania between mile markers 18 and 30.
Interstate 76 in Pennsylvania near mile marker 351.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 27 and 30.
Interstate 676 in Pennsylvania near mile marker 1.
Interstate 676 in New Jersey between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3983 7506 3990 7516 3998 7518 3999 7516
4004 7516 4003 7498
TIME...MOT...LOC 2349Z 270DEG 33KT 3994 7512
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JEO953
WWUS51 KPHI 260000
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
800 PM EDT Mon Oct 25 2021
NJC005-007-PAC101-260010-
/O.CAN.KPHI.SV.W.0317.000000T0000Z-211026T0015Z/
Camden NJ-Burlington NJ-Philadelphia PA-
800 PM EDT Mon Oct 25 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAMDEN...WEST
CENTRAL BURLINGTON AND CENTRAL PHILADELPHIA COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with this thunderstorm.
LAT...LON 3983 7506 3990 7516 3998 7518 3999 7516
4004 7516 4003 7498
TIME...MOT...LOC 2359Z 191DEG 33KT 4004 7509
$$
JEOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 25, 3:12 AM EDT | Gale Watch | PHI | 13 hr | |
| Oct 25, 4:15 PM EDT | Gale Warning | PHI | 46 hr | |
| Oct 25, 6:03 PM EDT | Special Marine Warning | PHI | 57 min | |
| Oct 25, 6:27 PM EDT | Special Weather Statement | PHI | Salem | 33 min |
| Oct 25, 6:33 PM EDT | Severe Thunderstorm Warning | PHI | Salem | 42 min |
| Oct 25, 7:02 PM EDT | Special Weather Statement | PHI | Camden, Gloucester, Salem | 43 min |
| Oct 25, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware | 48 min |
| Oct 25, 7:43 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 47 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2021Severe Thunderstorm Warnings in Pennsylvania, 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.