Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 155, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 8, 2021, 6:09 PM EDT for 4 counties in New Jersey. It was in force for 51 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, 6:09 PM EDT (22:09 UTC)
- Expired
- Jul 8, 2021, 7:00 PM EDT
- In force
- 51 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, Somerset County, NJ, Sussex County, NJ
The radar
The Philadelphia radar (KDIX), 87 km from the middle of the area, began a volume at 22:09 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 | Tewksbury Twp, NJ | TREES WERE DOWNED IN TEWKSBURY TWP. TIME ESTIMATED FROM RADAR AND DISPATCH REPORTS. |
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, 10.2 hours before the alert went out and 154 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.
425
WUUS51 KPHI 082209
SVRPHI
NJC019-027-035-037-082300-
/O.NEW.KPHI.SV.W.0155.210708T2209Z-210708T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
609 PM EDT Thu Jul 8 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern Hunterdon County in northwestern New Jersey...
Central Morris County in northern New Jersey...
South central Sussex County in northwestern New Jersey...
Northwestern Somerset County in northern New Jersey...
* Until 700 PM EDT.
* At 609 PM EDT, a severe thunderstorm was located over White House
Station, or 10 miles northwest of Somerville, moving northeast at
20 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...
Morristown, Bridgewater, Dover, Madison, Hopatcong, Wharton,
Rockaway, Morris Plains, Mount Arlington, Mendham, High Bridge,
Stanhope, Netcong, Clinton, Peapack And Gladstone, Chester, Victory
Gardens, Lebanon, Califon and Far Hills.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 18 and 34.
Interstate 80 in New Jersey between mile markers 27 and 36, and near
mile marker 41.
Interstate 287 in New Jersey between mile markers 19 and 40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4053 7474 4065 7492 4098 7464 4081 7436
TIME...MOT...LOC 2209Z 218DEG 18KT 4065 7477
HAIL...1.00IN
WIND...60MPH
$$
NC2 follow-up statements
066
WWUS51 KPHI 082227
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
627 PM EDT Thu Jul 8 2021
NJC019-027-035-037-082300-
/O.CON.KPHI.SV.W.0155.000000T0000Z-210708T2300Z/
Hunterdon NJ-Morris NJ-Sussex NJ-Somerset NJ-
627 PM EDT Thu Jul 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHEASTERN HUNTERDON...CENTRAL MORRIS...SOUTH CENTRAL SUSSEX
AND NORTHWESTERN SOMERSET COUNTIES...
At 626 PM EDT, a severe thunderstorm was located over Peapack And
Gladstone, or 11 miles northwest of Somerville, moving northeast at
20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Morristown, Dover, Madison, Hopatcong, Wharton, Rockaway, Morris
Plains, Mount Arlington, Mendham, Stanhope, Netcong, Peapack And
Gladstone, Chester, Victory Gardens, Califon, Far Hills, Succasunna,
Succasunna-Kenvil, Long Valley and Basking Ridge.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 23 and 31.
Interstate 80 in New Jersey between mile markers 27 and 36, and near
mile marker 41.
Interstate 287 in New Jersey between mile markers 21 and 40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4061 7469 4068 7489 4098 7464 4081 7436
TIME...MOT...LOC 2226Z 218DEG 18KT 4072 7470
HAIL...1.00IN
WIND...60MPH
$$
NC153
WWUS51 KPHI 082253
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
653 PM EDT Thu Jul 8 2021
NJC019-027-035-037-082303-
/O.EXP.KPHI.SV.W.0155.000000T0000Z-210708T2300Z/
Hunterdon NJ-Morris NJ-Sussex NJ-Somerset NJ-
653 PM EDT Thu Jul 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HUNTERDON...
CENTRAL MORRIS...SOUTH CENTRAL SUSSEX AND NORTHWESTERN SOMERSET
COUNTIES WILL EXPIRE AT 700 PM EDT...
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 will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern and northwestern New Jersey.
LAT...LON 4061 7469 4068 7489 4098 7464 4081 7436
TIME...MOT...LOC 2253Z 218DEG 18KT 4082 7460
$$
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, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Sussex, Warren | 44 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.