Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 195, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 17, 2021, 8:36 PM EDT for 6 counties in New Jersey. It was in force for 54 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
- Jul 17, 2021, 8:36 PM EDT (00:36 UTC)
- Expired
- Jul 17, 2021, 9:30 PM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 38 km from the middle of the area, began a volume at 00:39 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 |
|---|---|---|---|
| Jul 17, 1:13 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 0.6 hours before the alert went out and 151 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
- 1431 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 988 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted.
658
WUUS51 KPHI 180036
SVRPHI
NJC005-021-023-025-029-035-180130-
/O.NEW.KPHI.SV.W.0195.210718T0036Z-210718T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
836 PM EDT Sat Jul 17 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Ocean County in southern New Jersey...
Mercer County in central New Jersey...
North central Burlington County in southern New Jersey...
Southern Somerset County in northern New Jersey...
Western Monmouth County in central New Jersey...
Middlesex County in northern New Jersey...
* Until 930 PM EDT.
* At 836 PM EDT, severe thunderstorms were located along a line
extending from Princeton to Mount Holly, moving east 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...
Toms River, Trenton, New Brunswick, Perth Amboy, Somerset, Old
Bridge, Jackson, East Brunswick, South Brunswick, Sayreville, North
Brunswick, Marlboro, Manalapan, Princeton, Matawan, Jamesburg,
Hightstown, Bordentown, Cranbury and Lakehurst.
This includes the following highways...
New Jersey Turnpike between exits 7 and 10.
Interstate 195 in New Jersey between mile markers 0 and 27.
Interstate 295 in New Jersey between mile markers 54 and 70.
Garden State Parkway between mile markers 119 and 127.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3999 7426 4010 7476 4014 7476 4015 7472
4017 7473 4018 7475 4049 7474 4052 7426
4050 7426 4050 7428 4047 7427 4044 7420
TIME...MOT...LOC 0036Z 250DEG 20KT 4034 7465 4000 7475
HAIL...<.75IN
WIND...60MPH
$$
NC1 follow-up statement
964
WWUS51 KPHI 180104
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
904 PM EDT Sat Jul 17 2021
NJC005-021-023-025-029-035-180130-
/O.CON.KPHI.SV.W.0195.000000T0000Z-210718T0130Z/
Ocean NJ-Mercer NJ-Burlington NJ-Somerset NJ-Monmouth NJ-
Middlesex NJ-
904 PM EDT Sat Jul 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR NORTHWESTERN OCEAN...MERCER...NORTH CENTRAL BURLINGTON...SOUTHERN
SOMERSET...WESTERN MONMOUTH AND MIDDLESEX COUNTIES...
At 903 PM EDT, severe thunderstorms were located along a line
extending from Dayton to near Wrightstown, moving east at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Toms River, Trenton, New Brunswick, Perth Amboy, Somerset, Old
Bridge, Jackson, East Brunswick, South Brunswick, Sayreville, North
Brunswick, Marlboro, Manalapan, Princeton, Matawan, Jamesburg,
Hightstown, Bordentown, Cranbury and Lakehurst.
This includes the following highways...
New Jersey Turnpike between exits 7 and 10.
Interstate 195 in New Jersey between mile markers 0 and 27.
Interstate 295 in New Jersey between mile markers 54 and 70.
Garden State Parkway between mile markers 119 and 127.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3999 7426 4010 7476 4014 7476 4015 7472
4017 7473 4018 7475 4049 7474 4052 7426
4050 7426 4050 7428 4047 7427 4044 7420
TIME...MOT...LOC 0103Z 250DEG 20KT 4039 7448 4005 7458
HAIL...<.75IN
WIND...60MPH
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 8:00 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Mercer, Monmouth | 45 min |
| Jul 17, 8:09 PM EDT | Flash Flood Warning | PHI | Mercer, Somerset | 4 hr |
| Jul 17, 8:35 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester | 40 min |
| Jul 17, 8:46 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jul 17, 8:53 PM EDT | Areal Flood Advisory | PHI | Mercer, Middlesex, Monmouth | 3 hr |
| Jul 17, 9:25 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Salem | 2 hr |
| Jul 17, 9:27 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 48 min |
| Jul 17, 9:30 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 29 min |
| Jul 17, 9:36 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester, Salem | 2 hr |
| Jul 17, 9:44 PM EDT | Special Marine Warning | PHI | 61 min | |
| Jul 17, 9:48 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Mercer, Salem | 42 min |
| Jul 17, 10:21 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 54 min |
| Jul 17, 10:22 PM EDT | Tornado Warning | PHI | Burlington, Monmouth, Ocean | 23 min |
| Jul 17, 10:27 PM EDT | Special Weather Statement | PHI | Burlington, Camden | 33 min |
| Jul 17, 10:38 PM EDT | Tornado Warning | PHI | Burlington, Monmouth, Ocean | 16 min |
| Jul 17, 10:43 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 79 min |
| Jul 17, 10:47 PM EDT | Special Marine Warning | PHI | 118 min | |
| Jul 17, 10:51 PM EDT | Special Marine Warning | PHI | 114 min | |
| Jul 17, 11:07 PM EDT | Special Weather Statement | PHI | Middlesex | 38 min |
| Jul 17, 11:08 PM EDT | Areal Flood Warning | PHI | Hunterdon | 12 hr |
| Jul 17, 11:11 PM EDT | Special Weather Statement | PHI | Monmouth, Ocean | 34 min |
| Jul 17, 11:20 PM EDT | Special Marine Warning | PHI | 115 min | |
| Jul 17, 11:26 PM EDT | Areal Flood Warning | PHI | Somerset | 10 hr |
| Jul 18, 2:41 AM EDT | Areal Flood Warning | PHI | Mercer | 4 hr |
| Jul 18, 3:48 AM EDT | River Flood Warning | PHI | Mercer | 3 hr |
| Jul 18, 9:08 AM EDT | Areal Flood Warning | PHI | Somerset | 2 hr |
| Jul 18, 11:03 AM EDT | River Flood Warning | PHI | Middlesex, Somerset | 88 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 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.