Alert archive / New Jersey / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 208, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 18, 2024, 5:10 PM EDT for Hunterdon County, Morris County, Warren County, New Jersey. It was in force for 29 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, 5:10 PM EDT (21:10 UTC)
- Expired
- Aug 18, 2024, 5:39 PM EDT
- In force
- 29 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Morris County, NJ, Warren County, NJ
The radar
The Philadelphia radar (KDIX), 90 km from the middle of the area, began a volume at 21:11 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 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, 9.2 hours before the alert went out and 175 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.
161
WUUS51 KPHI 182110
SVRPHI
NJC019-027-041-182215-
/O.NEW.KPHI.SV.W.0208.240818T2110Z-240818T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
510 PM EDT Sun Aug 18 2024
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern Hunterdon County in northwestern New Jersey...
Southwestern Morris County in northern New Jersey...
South central Warren County in northwestern New Jersey...
* Until 615 PM EDT.
* At 510 PM EDT, a severe thunderstorm was located over Hampton, or
12 miles east of Easton, moving east at 10 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Washington, High Bridge, Clinton, Glen Gardner, Hampton, Lebanon,
Califon, Pleasant Valley, Annandale, White House Station, Long
Valley, and Brass Castle.
This includes Interstate 78 in New Jersey between mile markers 11 and
25.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4056 7501 4074 7505 4081 7480 4062 7473
TIME...MOT...LOC 2110Z 253DEG 9KT 4067 7498
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS2 follow-up statements
691
WWUS51 KPHI 182122
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
522 PM EDT Sun Aug 18 2024
NJC019-027-041-182215-
/O.CON.KPHI.SV.W.0208.000000T0000Z-240818T2215Z/
Hunterdon NJ-Morris NJ-Warren NJ-
522 PM EDT Sun Aug 18 2024
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHEASTERN HUNTERDON...SOUTHWESTERN MORRIS AND SOUTH CENTRAL
WARREN COUNTIES...
At 522 PM EDT, a severe thunderstorm was located over Hampton, or 13
miles east of Easton, moving northeast at 10 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Washington, High Bridge, Clinton, Glen Gardner, Hampton, Califon,
Pleasant Valley, Annandale, Long Valley, and Brass Castle.
This includes Interstate 78 in New Jersey between mile markers 14 and
15.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4062 7494 4068 7504 4071 7504 4075 7502
4081 7480 4072 7477
TIME...MOT...LOC 2122Z 216DEG 8KT 4071 7496
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS895
WWUS51 KPHI 182139
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
539 PM EDT Sun Aug 18 2024
NJC019-027-041-182149-
/O.CAN.KPHI.SV.W.0208.000000T0000Z-240818T2215Z/
Hunterdon NJ-Morris NJ-Warren NJ-
539 PM EDT Sun Aug 18 2024
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HUNTERDON...
SOUTHWESTERN MORRIS AND SOUTH CENTRAL WARREN 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, heavy rain is
still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern and northwestern New Jersey.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4062 7494 4068 7504 4071 7504 4075 7502
4081 7480 4072 7477
TIME...MOT...LOC 2138Z 253DEG 9KT 4072 7490
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 3:09 AM EDT | Flash Flood Warning | PHI | Burlington, Camden | 93 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, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 41 min |
| Aug 18, 4:41 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 34 min |
| Aug 18, 4:56 PM EDT | Flash Flood Warning | PHI | Warren | 6 hr |
| Aug 18, 5:21 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 39 min |
| Aug 18, 5:31 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 6 hr |
| 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, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth | 58 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, 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.