Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 156, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 8, 2021, 6:16 PM EDT for 4 counties in New Jersey; Northampton County, Pennsylvania. It was in force for 44 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 8, 2021, 6:16 PM EDT (22:16 UTC)
- Expired
- Jul 8, 2021, 7:00 PM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Morris County, NJ, Sussex County, NJ, Warren County, NJ, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 115 km from the middle of the area, began a volume at 22:19 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 8, 6:16 PM EDT | TSTM WND DMG | 3 Sse Columbia, NJ | DOWNED TREE ON US 46 EASTBOUND CR 616/KNOWLTON RD (KNOWLTON TWP) ALL LANES CLOSED. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 8, 2:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.3 hours before the alert went out and 170 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
- 973 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 751 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted.
409
WUUS51 KPHI 082216
SVRPHI
NJC019-027-037-041-PAC095-082300-
/O.NEW.KPHI.SV.W.0156.210708T2216Z-210708T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
616 PM EDT Thu Jul 8 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northern Hunterdon County in northwestern New Jersey...
Northwestern Morris County in northern New Jersey...
Southwestern Sussex County in northwestern New Jersey...
Warren County in northwestern New Jersey...
Northeastern Northampton County in eastern Pennsylvania...
* Until 700 PM EDT.
* At 616 PM EDT, a severe thunderstorm was located over Oxford, or 16
miles northeast of Easton, 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...
Newton, Hopatcong, Hackettstown, Washington, Blairstown, Mount
Arlington, Franklin, Stanhope, Netcong, Belvidere, Oxford,
Ogdensburg, Hope, Glen Gardner, Hampton, East Bangor, Branchville,
Andover, Brass Castle and Lake Mohawk.
This includes Interstate 80 in New Jersey between mile markers 2 and
28.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4068 7490 4088 7519 4101 7507 4121 7476
4104 7450
TIME...MOT...LOC 2216Z 217DEG 23KT 4080 7495
HAIL...1.00IN
WIND...60MPH
$$
NC2 follow-up statements
433
WWUS51 KPHI 082240 RRA
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
640 PM EDT Thu Jul 8 2021
NJC019-027-037-041-PAC095-082300-
/O.CON.KPHI.SV.W.0156.000000T0000Z-210708T2300Z/
Hunterdon NJ-Morris NJ-Sussex NJ-Warren NJ-Northampton PA-
640 PM EDT Thu Jul 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHERN HUNTERDON...NORTHWESTERN MORRIS...SOUTHWESTERN SUSSEX...
WARREN AND NORTHEASTERN NORTHAMPTON COUNTIES...
At 637 PM EDT, a severe thunderstorm was located over
Allamuchy-Panther Valley, or 10 miles southwest of Newton, moving
northeast at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Newton, Hopatcong, Hackettstown, Washington, Blairstown, Mount
Arlington, Franklin, Stanhope, Netcong, Belvidere, Oxford,
Ogdensburg, Hope, Glen Gardner, Hampton, East Bangor, Branchville,
Andover, Brass Castle and Lake Mohawk.
This includes Interstate 80 in New Jersey between mile markers 2 and
28.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4068 7490 4088 7519 4101 7507 4121 7476
4104 7450
TIME...MOT...LOC 2237Z 217DEG 23KT 4091 7484
HAIL...1.00IN
WIND...60MPH
$$
NC172
WWUS51 KPHI 082252
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
652 PM EDT Thu Jul 8 2021
NJC019-027-037-041-PAC095-082302-
/O.EXP.KPHI.SV.W.0156.000000T0000Z-210708T2300Z/
Hunterdon NJ-Morris NJ-Sussex NJ-Warren NJ-Northampton PA-
652 PM EDT Thu Jul 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN HUNTERDON...
NORTHWESTERN MORRIS...SOUTHWESTERN SUSSEX...WARREN AND NORTHEASTERN
NORTHAMPTON COUNTIES WILL EXPIRE AT 700 PM EDT...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern and northwestern New Jersey...and eastern Pennsylvania.
LAT...LON 4068 7490 4088 7519 4101 7507 4121 7476
4104 7450
TIME...MOT...LOC 2252Z 217DEG 23KT 4098 7477
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 11:06 PM EDT | Tropical Storm Warning | PHI | Atlantic, Burlington, Cape May, Monmouth, Ocean | 32 hr |
| Jul 7, 11:37 PM EDT | Special Weather Statement | PHI | Sussex | 38 min |
| Jul 8, 5:27 AM EDT | Small Craft Advisory | PHI | 34 hr | |
| Jul 8, 1:49 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset | 41 min |
| Jul 8, 2:09 PM EDT | Special Marine Warning | PHI | 81 min | |
| Jul 8, 2:26 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 21 min |
| Jul 8, 2:29 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset, Warren | 46 min |
| Jul 8, 2:43 PM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 27 hr |
| Jul 8, 3:03 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Morris, Somerset | 42 min |
| Jul 8, 4:02 PM EDT | Special Marine Warning | PHI | 33 min | |
| Jul 8, 4:02 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 31 min |
| Jul 8, 4:43 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Somerset | 16 min |
| Jul 8, 5:29 PM EDT | Special Weather Statement | PHI | Morris, Warren | 46 min |
| Jul 8, 5:34 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Sussex, Warren | 41 min |
| Jul 8, 6:06 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon | 39 min |
| Jul 8, 6:09 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset, Sussex | 51 min |
| Jul 7, 11:11 PM EDT | Special Weather Statement | PHI | Monroe | 49 min |
| Jul 8, 8:53 AM EDT | Special Weather Statement | PHI | Monroe | 52 min |
| Jul 8, 9:31 AM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 119 min |
| Jul 8, 9:46 AM EDT | Special Weather Statement | PHI | Monroe | 44 min |
| Jul 8, 3:50 PM EDT | Special Weather Statement | PHI | Berks | 25 min |
| Jul 8, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Montgomery | 39 min |
| Jul 8, 4:25 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 50 min |
| Jul 8, 4:45 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 45 min |
| Jul 8, 4:51 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 54 min |
| Jul 8, 5:11 PM EDT | Special Weather Statement | PHI | Lehigh | 34 min |
| Jul 8, 5:21 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 39 min |
| Jul 8, 5:52 PM EDT | Special Weather Statement | PHI | Berks | 23 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.