Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 103, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 21, 2021, 8:13 PM EDT for Monroe County, Northampton County, Pennsylvania; Morris County, Sussex County, Warren County, New Jersey. It was in force for 62 min. 11 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 21, 2021, 8:13 PM EDT (00:13 UTC)
- Expired
- Jun 21, 2021, 9:15 PM EDT
- In force
- 62 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 132 km from the middle of the area, began a volume at 00:15 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 |
|---|---|---|---|
| Jun 21, 8:15 PM EDT | TSTM WND DMG | 4 Se East Bangor, PA | DOWNED POWER LINES NEAR DEER RUN ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 21, 8:22 PM EDT | TSTM WND DMG | 2 Sse Columbia, NJ | DOWNED TREES AND WIRES NEAR DELAWARE ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 21, 8:22 PM EDT | TSTM WND DMG | 4 Ne Martins Creek, PA | DOWNED TREE IN WIRES NEAR THE INTERSECTION OF MILLER ROAD AND RICHMOND ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 21, 8:27 PM EDT | TSTM WND DMG | 2 Wsw Hope, NJ | DOWNED TREES AND WIRES NEAR LOCUST LAKE ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 21, 8:32 PM EDT | TSTM WND DMG | 2 Ssw Blairstown, NJ | DOWNED TREES AND WIRES NEAR HOAGLAND ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 21, 8:37 PM EDT | TSTM WND DMG | 2 Se Hainesville, NJ | DOWNED POWER LINES NEAR FLATBROOK ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 21, 8:40 PM EDT | TSTM WND DMG | 1 S Fredon Twp, NJ | REPORT OF TREE AND WIRES DOWN ON PHIL HARDIN ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 21, 8:40 PM EDT | TSTM WND DMG | 2 Nne Frelinghuysen Twp, NJ | TREE DOWN ON YELLOW FRAME ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 21, 8:45 PM EDT | TSTM WND DMG | 2 Nne Newton, NJ | REPORT OF TREE AND WIRES DOWN. TIME ESTIMATED FROM RADAR. |
| Jun 21, 8:45 PM EDT | TSTM WND DMG | 2 W Newton, NJ | DOWNED TREES AND WIRES NEAR NEWTON SWARTSWOOD ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 21, 8:47 PM EDT | TSTM WND DMG | 3 Nnw Pellettown, NJ | DOWNED POWER LINES NEAR WANTAGE 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 21, 4:33 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 0.2 hours before the alert went out and 163 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
- 127 J/kg
- Mixed-layer CIN
- -165 J/kg
- Mixed-layer LCL
- 775 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
518
WUUS51 KPHI 220013
SVRPHI
NJC027-037-041-PAC089-095-220115-
/O.NEW.KPHI.SV.W.0103.210622T0013Z-210622T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
813 PM EDT Mon Jun 21 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Morris County in northern New Jersey...
Sussex County in northwestern New Jersey...
Warren County in northwestern New Jersey...
Central Monroe County in northeastern Pennsylvania...
Eastern Northampton County in eastern Pennsylvania...
* Until 915 PM EDT.
* At 812 PM EDT, severe thunderstorms were located along a line
extending from Paupack to near Bangor, moving northeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Easton, Newton, Montague, Mount Pocono, Hopatcong, Forks, East
Stroudsburg, Hackettstown, Washington, Blairstown, Bangor, Mount
Arlington, Franklin, Stanhope, Pen Argyl, Hamburg, Netcong, Wind
Gap, Belvidere and Harmony.
This includes the following highways...
Interstate 78 in Pennsylvania near mile marker 76.
Interstate 78 in New Jersey between mile markers 0 and 4.
Interstate 80 in Pennsylvania between mile markers 300 and 314.
Interstate 80 in New Jersey between mile markers 0 and 30.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
&&
LAT...LON 4120 7436 4109 7450 4104 7450 4105 7445
4102 7443 4102 7441 4085 7472 4078 7490
4063 7521 4124 7541 4125 7513 4115 7515
4114 7509 4108 7503 4116 7490 4127 7484
4132 7479 4136 7470
TIME...MOT...LOC 0012Z 232DEG 40KT 4140 7523 4082 7517
HAIL...<.75IN
WIND...60MPH
$$
CMS5 follow-up statements
428
WWUS51 KPHI 220030
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
830 PM EDT Mon Jun 21 2021
NJC027-037-041-PAC089-095-220115-
/O.CON.KPHI.SV.W.0103.000000T0000Z-210622T0115Z/
Morris NJ-Sussex NJ-Warren NJ-Monroe PA-Northampton PA-
830 PM EDT Mon Jun 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NORTHWESTERN MORRIS...SUSSEX...WARREN...EAST CENTRAL MONROE AND
EASTERN NORTHAMPTON COUNTIES...
At 830 PM EDT, severe thunderstorms were located along a line
extending from near Lackawaxen to Roxburg, moving northeast at 35
mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Easton, Newton, Montague, Hopatcong, East Stroudsburg, Hackettstown,
Washington, Blairstown, Mount Arlington, Franklin, Stanhope, Hamburg,
Netcong, Belvidere, Harmony, Oxford, Ogdensburg, Alpha, Sussex and
Hope.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 0 and 4.
Interstate 80 in Pennsylvania between mile markers 313 and 314.
Interstate 80 in New Jersey between mile markers 0 and 30.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4120 7436 4109 7450 4104 7450 4105 7445
4102 7443 4102 7441 4085 7472 4078 7490
4063 7521 4115 7515 4114 7509 4108 7503
4116 7490 4127 7484 4132 7479 4136 7470
TIME...MOT...LOC 0030Z 241DEG 31KT 4150 7505 4078 7507
HAIL...<.75IN
WIND...60MPH
$$
CMS990
WWUS51 KPHI 220042
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
842 PM EDT Mon Jun 21 2021
PAC089-095-220052-
/O.CAN.KPHI.SV.W.0103.000000T0000Z-210622T0115Z/
Monroe PA-Northampton PA-
842 PM EDT Mon Jun 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MONROE AND
EASTERN NORTHAMPTON COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
northern and northwestern New Jersey...and eastern and northeastern
Pennsylvania.
LAT...LON 4120 7436 4109 7450 4104 7450 4105 7445
4102 7443 4102 7441 4085 7472 4078 7490
4073 7500 4087 7505 4098 7514 4109 7497
4109 7498 4118 7488 4132 7479 4136 7470
TIME...MOT...LOC 0042Z 235DEG 30KT 4125 7474 4085 7495
$$
NJC027-037-041-220115-
/O.CON.KPHI.SV.W.0103.000000T0000Z-210622T0115Z/
Morris NJ-Sussex NJ-Warren NJ-
842 PM EDT Mon Jun 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NORTHWESTERN MORRIS...SUSSEX AND WARREN COUNTIES...
At 842 PM EDT, severe thunderstorms were located along a line
extending from near Hainesville to near Oxford, moving northeast at
35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement. Several reports of wind damage have been
received from Northampton County.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Newton, Montague, Hopatcong, Hackettstown, Washington, Blairstown,
Mount Arlington, Franklin, Stanhope, Hamburg, Netcong, Oxford,
Ogdensburg, Sussex, Hope, Branchville, Andover, High Point, Lake
Mohawk and Greendell.
This includes Interstate 80 in New Jersey between mile markers 0 and
30.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4120 7436 4109 7450 4104 7450 4105 7445
4102 7443 4102 7441 4085 7472 4078 7490
4073 7500 4087 7505 4098 7514 4109 7497
4109 7498 4118 7488 4132 7479 4136 7470
TIME...MOT...LOC 0042Z 235DEG 30KT 4125 7474 4085 7495
HAIL...<.75IN
WIND...60MPH
$$
CMS240
WWUS51 KPHI 220055
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
855 PM EDT Mon Jun 21 2021
NJC027-037-041-220115-
/O.CON.KPHI.SV.W.0103.000000T0000Z-210622T0115Z/
Morris NJ-Sussex NJ-Warren NJ-
855 PM EDT Mon Jun 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NORTHWESTERN MORRIS...SUSSEX AND EAST CENTRAL WARREN COUNTIES...
At 854 PM EDT, severe thunderstorms were located along a line
extending from near High Point to Budd Lake, moving northeast at 40
mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement. This line has a history of wind damage in
Northampton and Warren Counties.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Newton, Montague, Hopatcong, Hackettstown, Mount Arlington, Franklin,
Stanhope, Hamburg, Netcong, Ogdensburg, Sussex, Branchville, Andover,
High Point, Lake Mohawk, Greendell, Vernon Valley, Green Pond,
Pellettown and Allamuchy-Panther Valley.
This includes Interstate 80 in New Jersey between mile markers 18 and
31.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4120 7436 4120 7438 4109 7450 4104 7450
4105 7445 4102 7443 4102 7442 4101 7442
4085 7472 4078 7489 4132 7479 4136 7470
TIME...MOT...LOC 0054Z 228DEG 35KT 4132 7461 4087 7476
HAIL...<.75IN
WIND...60MPH
$$
CMS502
WWUS51 KPHI 220106
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
906 PM EDT Mon Jun 21 2021
NJC041-220116-
/O.CAN.KPHI.SV.W.0103.000000T0000Z-210622T0115Z/
Warren NJ-
906 PM EDT Mon Jun 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WARREN COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
northern and northwestern New Jersey.
LAT...LON 4120 7436 4120 7438 4109 7450 4104 7450
4105 7445 4102 7443 4102 7442 4101 7442
4085 7472 4113 7474 4136 7470
TIME...MOT...LOC 0106Z 232DEG 40KT 4139 7449 4094 7464
$$
NJC027-037-220115-
/O.CON.KPHI.SV.W.0103.000000T0000Z-210622T0115Z/
Morris NJ-Sussex NJ-
906 PM EDT Mon Jun 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NORTH CENTRAL MORRIS AND CENTRAL SUSSEX COUNTIES...
At 906 PM EDT, severe thunderstorms were located along a line
extending from near Middletown to Hopatcong, moving northeast at 45
mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement. Trees and wires were reported downed in
Hampton Township in Sussex County.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Newton, Hopatcong, Mount Arlington, Franklin, Stanhope, Hamburg,
Netcong, Ogdensburg, Sussex, High Point, Lake Mohawk, Vernon Valley,
Green Pond, Pellettown, Highland Lake, Lake Telemark and Budd Lake.
This includes Interstate 80 in New Jersey between mile markers 26 and
31.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4120 7436 4120 7438 4109 7450 4104 7450
4105 7445 4102 7443 4102 7442 4101 7442
4085 7472 4113 7474 4136 7470
TIME...MOT...LOC 0106Z 232DEG 40KT 4139 7449 4094 7464
HAIL...<.75IN
WIND...60MPH
$$
CMS393
WWUS51 KPHI 220115
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
915 PM EDT Mon Jun 21 2021
NJC027-037-220125-
/O.EXP.KPHI.SV.W.0103.000000T0000Z-210622T0115Z/
Morris NJ-Sussex NJ-
915 PM EDT Mon Jun 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL MORRIS AND
CENTRAL SUSSEX COUNTIES HAS EXPIRED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire. However gusty
winds are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
northern and northwestern New Jersey.
LAT...LON 4120 7436 4120 7438 4109 7450 4104 7450
4105 7445 4102 7443 4102 7442 4101 7442
4085 7472 4113 7474 4136 7470
TIME...MOT...LOC 0115Z 232DEG 40KT 4144 7440 4099 7455
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 8:31 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jun 21, 10:01 PM EDT | Special Marine Warning | PHI | 29 min | |
| Jun 22, 11:46 AM EDT | Special Marine Warning | PHI | 44 min | |
| Jun 22, 12:51 PM EDT | Special Marine Warning | PHI | 114 min | |
| Jun 22, 1:25 PM EDT | Special Marine Warning | PHI | 65 min | |
| Jun 22, 1:47 PM EDT | Special Marine Warning | PHI | 118 min | |
| Jun 22, 2:27 PM EDT | Special Marine Warning | PHI | 93 min | |
| Jun 22, 3:05 PM EDT | Small Craft Advisory | PHI | 15 hr | |
| Jun 22, 3:26 PM EDT | Special Marine Warning | PHI | 68 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.