Alert archive / New Jersey / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 209, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 18, 2024, 5:21 PM EDT for Bucks County, Pennsylvania; Burlington County, Camden County, New Jersey. It was in force for 39 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 18, 2024, 5:21 PM EDT (21:21 UTC)
- Expired
- Aug 18, 2024, 6:00 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Camden County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 39 km from the middle of the area, began a volume at 21:25 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 18, 2:02 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 9.4 hours before the alert went out and 199 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
- 109 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 582 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 187 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
249
WUUS51 KPHI 182121
SVRPHI
NJC005-007-PAC017-182200-
/O.NEW.KPHI.SV.W.0209.240818T2121Z-240818T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
521 PM EDT Sun Aug 18 2024
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
North central Camden County in southern New Jersey...
Northwestern Burlington County in southern New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
* Until 600 PM EDT.
* At 521 PM EDT, a severe thunderstorm was located over Springdale,
or 9 miles east of Gloucester City, moving northeast at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Cherry Hill, Evesham, Mount Laurel, Willingboro, Voorhees,
Lumberton, Florence, Burlington, Bristol, Mount Holly, Riverside,
Beverly, Ramblewood, Barclay-Kingston, Marlton, Jacksonville,
Ashland, Springdale, Greentree, and Jobstown.
This includes the following highways...
New Jersey Turnpike between exits 4 and 6A.
Pennsylvania Turnpike between mile markers 354 and 359.
Interstate 95 in Pennsylvania between mile markers 36 and 40.
Interstate 295 in New Jersey between mile markers 32 and 53.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3982 7490 3987 7503 4016 7491 4005 7463
TIME...MOT...LOC 2121Z 208DEG 20KT 3988 7494
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann3 follow-up statements
928
WWUS51 KPHI 182131
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
531 PM EDT Sun Aug 18 2024
NJC007-182141-
/O.CAN.KPHI.SV.W.0209.000000T0000Z-240818T2200Z/
Camden NJ-
531 PM EDT Sun Aug 18 2024
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CAMDEN COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southern New Jersey...and southeastern Pennsylvania.
LAT...LON 3985 7487 3986 7492 3988 7493 3990 7495
3991 7495 3992 7498 3994 7498 3995 7500
4016 7491 4005 7463
TIME...MOT...LOC 2131Z 207DEG 20KT 3994 7490
$$
NJC005-PAC017-182200-
/O.CON.KPHI.SV.W.0209.000000T0000Z-240818T2200Z/
Burlington NJ-Bucks PA-
531 PM EDT Sun Aug 18 2024
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHWESTERN BURLINGTON AND SOUTHEASTERN BUCKS COUNTIES...
At 531 PM EDT, a severe thunderstorm was located over Mount Laurel,
or 11 miles east of Camden, moving northeast at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Evesham, Mount Laurel, Willingboro, Lumberton, Florence, Burlington,
Bristol, Mount Holly, Riverside, Beverly, Ramblewood, Marlton,
Jacksonville, Jobstown, Columbus, Florence-Roebling, Greentree,
Levittown, Cherry Hill Mall, and Barclay-Kingston.
This includes the following highways...
New Jersey Turnpike between exits 4 and 6A.
Pennsylvania Turnpike between mile markers 354 and 359.
Interstate 95 in Pennsylvania between mile markers 36 and 40.
Interstate 295 in New Jersey between mile markers 36 and 53.
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 3985 7487 3986 7492 3988 7493 3990 7495
3991 7495 3992 7498 3994 7498 3995 7500
4016 7491 4005 7463
TIME...MOT...LOC 2131Z 207DEG 20KT 3994 7490
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann272
WWUS51 KPHI 182143
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
543 PM EDT Sun Aug 18 2024
NJC005-PAC017-182200-
/O.CON.KPHI.SV.W.0209.000000T0000Z-240818T2200Z/
Burlington NJ-Bucks PA-
543 PM EDT Sun Aug 18 2024
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHWESTERN BURLINGTON AND SOUTHEASTERN BUCKS COUNTIES...
At 542 PM EDT, a severe thunderstorm was located over Mount Holly, or
14 miles south of Trenton, moving northeast at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Willingboro, Lumberton, Florence, Burlington, Bristol, Mount Holly,
Jobstown, Columbus, Jacksonville, Florence-Roebling, Levittown,
Edgewater Park, Nws Office, and Croydon.
This includes the following highways...
New Jersey Turnpike between exits 5 and 6A.
Pennsylvania Turnpike between mile markers 356 and 359.
Interstate 95 in Pennsylvania between mile markers 39 and 40.
Interstate 295 in New Jersey between mile markers 41 and 53.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3991 7479 3998 7494 4015 7488 4005 7463
TIME...MOT...LOC 2142Z 208DEG 21KT 4003 7482
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann271 WWUS51 KPHI 182159 SVSPHI Severe Weather Statement National Weather Service Mount Holly NJ 559 PM EDT Sun Aug 18 2024 NJC005-PAC017-182209- /O.EXP.KPHI.SV.W.0209.000000T0000Z-240818T2200Z/ Burlington NJ-Bucks PA- 559 PM EDT Sun Aug 18 2024 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BURLINGTON AND SOUTHEASTERN BUCKS COUNTIES WILL EXPIRE AT 600 PM EDT... The storm which prompted the warning has moved out of the area. Therefore, the warning will be allowed to expire. A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for southern New Jersey...and southeastern Pennsylvania. To report severe weather, contact your nearest law enforcement agency. They will relay your report to the National Weather Service Mount Holly NJ. Remember, a Severe Thunderstorm Warning still remains in effect for portions of northern Burlington County near Columbus and Bordentown until 645 PM EDT. LAT...LON 3991 7479 3998 7494 4015 7488 4005 7463 TIME...MOT...LOC 2159Z 208DEG 20KT 4010 7477 $$ Staarmann
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 1:35 AM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 2 hr |
| Aug 18, 3:09 AM EDT | Flash Flood Warning | PHI | Bucks | 93 min |
| Aug 18, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 19 min |
| Aug 18, 3:34 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 41 min |
| Aug 18, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 42 min |
| Aug 18, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 41 min |
| Aug 18, 4:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Montgomery, Northampton | 28 min |
| Aug 18, 4:41 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 34 min |
| Aug 18, 4:56 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 6 hr |
| Aug 18, 5:31 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Northampton | 6 hr |
| Aug 18, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 58 min |
| Aug 18, 4:41 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Mercer | 2 hr |
| Aug 18, 2:17 PM EDT | Special Marine Warning | PHI | 58 min | |
| Aug 18, 2:42 PM EDT | Special Marine Warning | PHI | 93 min | |
| Aug 18, 3:55 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 18, 5:10 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Warren | 29 min |
| Aug 18, 5:38 PM EDT | Flash Flood Warning | PHI | Sussex, Warren | 4 hr |
| Aug 18, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 43 min |
| Aug 18, 5:51 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset | 24 min |
| Aug 18, 5:59 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 18 min |
| Aug 18, 6:01 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 6 hr |
| Aug 18, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 66 min |
| Aug 18, 6:36 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 5 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2024Severe Thunderstorm Warnings in Pennsylvania, 2024Every severe thunderstorm warning in 2024
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.