Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 77, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 14, 2021, 6:48 PM EDT for Morris County, Somerset County, Sussex County, New Jersey. It was in force for 42 min. 4 reports 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
- Jun 14, 2021, 6:48 PM EDT (22:48 UTC)
- Expired
- Jun 14, 2021, 7:30 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Morris County, NJ, Somerset County, NJ, Sussex County, NJ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 14, 6:49 PM EDT | TSTM WND DMG | 3 Sw Long Valley, NJ | DOWNED TREES AND WIRES NEAR TURTLEBACK ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 14, 6:50 PM EDT | TSTM WND DMG | Franklin, NJ | REPORT OF WIRES DOWN NEAR FRANKLIN. TIME ESTIMATED FROM RADAR. |
| Jun 14, 7:06 PM EDT | TSTM WND DMG | 1 Ssw Mendham, NJ | REPORT OF WIRES DOWN. TIME ESTIMATED FROM RADAR. |
| Jun 14, 7:14 PM EDT | TSTM WND DMG | 1 Sw Morristown, NJ | DOWNED WIRES ON MOUNT KEMBLE AVENUE. 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 |
|---|---|---|---|
| Jun 14, 2:06 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.8 hours before the alert went out and 138 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 687 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
926
WUUS51 KPHI 142248
SVRPHI
NJC027-035-037-142330-
/O.NEW.KPHI.SV.W.0077.210614T2248Z-210614T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
648 PM EDT Mon Jun 14 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Morris County in northern New Jersey...
Eastern Sussex County in northwestern New Jersey...
North central Somerset County in northern New Jersey...
* Until 730 PM EDT.
* At 647 PM EDT, severe thunderstorms were located along a line
extending from near Unionville to near Franklin to near Hopatcong
to near Long Valley, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Morristown, Dover, Madison, Hopatcong, Florham Park, East Hanover,
Lincoln Park, Kinnelon, Chatham, Boonton, Butler, Wharton,
Rockaway, Morris Plains, Mount Arlington, Franklin, Mendham,
Mountain Lakes, Stanhope and Riverdale.
People at the Morris County Mega Site should seek safe shelter
immediately!
This includes the following highways...
Interstate 80 in New Jersey between mile markers 26 and 48.
Interstate 287 in New Jersey between mile markers 26 and 54.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4130 7456 4120 7436 4110 7449 4104 7450
4105 7445 4102 7443 4100 7430 4090 7427
4091 7434 4083 7433 4076 7438 4075 7436
4067 7446 4069 7472 4072 7473 4077 7486
4093 7469 4109 7473 4130 7458
TIME...MOT...LOC 2247Z 253DEG 37KT 4127 7453 4111 7464 4095 7460 4074
7475
HAIL...<.75IN
WIND...60MPH
$$
CMS3 follow-up statements
818
WWUS51 KPHI 142302
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
702 PM EDT Mon Jun 14 2021
NJC027-035-037-142330-
/O.CON.KPHI.SV.W.0077.000000T0000Z-210614T2330Z/
Morris NJ-Sussex NJ-Somerset NJ-
702 PM EDT Mon Jun 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR MORRIS...EASTERN SUSSEX AND NORTH CENTRAL SOMERSET COUNTIES...
At 701 PM EDT, severe thunderstorms were located along a line
extending from Florida to near Highland Lake to near Green Pond to
Mendham, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated. A couple of reports of power lines down
have been received from Sussex County.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Morristown, Dover, Madison, Hopatcong, Florham Park, East Hanover,
Lincoln Park, Kinnelon, Chatham, Boonton, Butler, Wharton, Rockaway,
Morris Plains, Mount Arlington, Franklin, Mendham, Mountain Lakes,
Riverdale and Hamburg.
People at the Morris County Mega Site should seek safe shelter
immediately!
This includes the following highways...
Interstate 80 in New Jersey between mile markers 29 and 48.
Interstate 287 in New Jersey between mile markers 26 and 54.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4130 7456 4120 7436 4110 7449 4104 7450
4105 7445 4102 7443 4100 7430 4090 7427
4091 7434 4083 7433 4076 7438 4075 7436
4067 7446 4069 7472 4072 7473 4107 7461
TIME...MOT...LOC 2301Z 248DEG 37KT 4131 7436 4115 7447 4099 7443 4078
7458
HAIL...<.75IN
WIND...60MPH
$$
CMS244
WWUS51 KPHI 142315
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
715 PM EDT Mon Jun 14 2021
NJC027-035-037-142330-
/O.CON.KPHI.SV.W.0077.000000T0000Z-210614T2330Z/
Morris NJ-Sussex NJ-Somerset NJ-
715 PM EDT Mon Jun 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR MORRIS...EAST CENTRAL SUSSEX AND NORTH CENTRAL SOMERSET
COUNTIES...
At 714 PM EDT, severe thunderstorms were located along a line
extending from near Chester to Upper Greenwood Lake to Butler to
Morristown, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement. Several reports of power lines down have
been received in eastern Sussex and northwestern Morris
Counties.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Morristown, Dover, Madison, Florham Park, East Hanover, Lincoln Park,
Kinnelon, Chatham, Boonton, Butler, Wharton, Rockaway, Morris Plains,
Mendham, Mountain Lakes, Riverdale, Peapack And Gladstone, Victory
Gardens, Far Hills and Green Pond.
People at the Morris County Mega Site should seek safe shelter
immediately!
This includes the following highways...
Interstate 80 in New Jersey between mile markers 32 and 48.
Interstate 287 in New Jersey between mile markers 26 and 54.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4120 7436 4110 7449 4104 7450 4105 7445
4102 7443 4100 7430 4090 7427 4091 7434
4083 7433 4076 7438 4075 7436 4067 7446
4069 7472 4104 7455 4125 7445
TIME...MOT...LOC 2314Z 249DEG 37KT 4131 7427 4115 7438 4099 7434 4078
7449
HAIL...<.75IN
WIND...60MPH
$$
CMS829
WWUS51 KPHI 142324
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
724 PM EDT Mon Jun 14 2021
NJC027-035-037-142334-
/O.EXP.KPHI.SV.W.0077.000000T0000Z-210614T2330Z/
Morris NJ-Sussex NJ-Somerset NJ-
724 PM EDT Mon Jun 14 2021
...THE SEVERE THUNDERSTORM WARNING FOR MORRIS...EAST CENTRAL SUSSEX
AND NORTH CENTRAL SOMERSET COUNTIES WILL EXPIRE AT 730 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and are exiting the warned area. Therefore, the warning will
be allowed to expire. However, gusty winds are still possible with
these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern and northwestern New Jersey.
LAT...LON 4120 7436 4110 7449 4104 7450 4105 7445
4102 7443 4100 7430 4090 7427 4091 7434
4083 7433 4076 7438 4075 7436 4067 7446
4069 7472 4104 7455 4125 7445
TIME...MOT...LOC 2324Z 253DEG 37KT 4134 7415 4118 7426 4102 7422 4081
7437
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 5:53 PM EDT | Special Weather Statement | PHI | Sussex | 37 min |
| Jun 14, 6:24 PM EDT | Special Weather Statement | PHI | Sussex | 36 min |
| Jun 14, 6:33 PM EDT | Special Weather Statement | PHI | Middlesex, Monmouth | 27 min |
| Jun 14, 7:02 PM EDT | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Monmouth | 43 min |
| Jun 14, 7:14 PM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth | 2 hr |
| Jun 14, 7:55 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 32 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.