Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 238, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2019, 6:16 PM EDT for Morris County, Sussex County, New Jersey. It was in force for 44 min. 3 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
- Jul 21, 2019, 6:16 PM EDT (22:16 UTC)
- Expired
- Jul 21, 2019, 7:00 PM EDT
- In force
- 44 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
The radar
The Philadelphia radar (KDIX), 109 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 21, 6:17 PM EDT | TSTM WND DMG | Byram Twp, NJ | PHOTO VIA SOCIAL MEDIA OF A LARGE TREE LIMB DOWN. TIME ESTIMATED FROM RADAR. |
| Jul 21, 6:23 PM EDT | TSTM WND DMG | Hopatcong, NJ | TREES REPORTED DOWN IN THE HOPATCONG AREA. TIME ESTIMATED FROM RADAR. |
| Jul 21, 6:30 PM EDT | TSTM WND DMG | Mount Arlington, NJ | TREES AND WIRES DOWN IN MOUNT ARLINGTON. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.3 hours before the alert went out and 130 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
- 751 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 1554 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 9.9
The text
As transmitted.
035
WUUS51 KPHI 212216
SVRPHI
NJC027-037-212315-
/O.NEW.KPHI.SV.W.0238.190721T2216Z-190721T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
616 PM EDT Sun Jul 21 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northern Morris County in northern New Jersey...
Southeastern Sussex County in northwestern New Jersey...
* Until 715 PM EDT.
* At 616 PM EDT, a severe thunderstorm was located over Andover, or
near Newton, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Morristown, Newton, Dover, Madison, Hopatcong, Florham Park, East
Hanover, Lincoln Park, Kinnelon, Chatham, Boonton, Butler, Wharton,
Rockaway, Morris Plains, Mount Arlington, Mountain Lakes, Stanhope,
Riverdale and Netcong.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4091 7433 4086 7432 4079 7437 4076 7438
4075 7436 4073 7437 4092 7479 4107 7477
4109 7450 4104 7450 4105 7445 4102 7443
4100 7429 4097 7428 4092 7429 4090 7427
TIME...MOT...LOC 2216Z 287DEG 30KT 4097 7472
HAIL...<.75IN
WIND...60MPH
$$
Robertson3 follow-up statements
845
WWUS51 KPHI 212234
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
634 PM EDT Sun Jul 21 2019
NJC037-212244-
/O.CAN.KPHI.SV.W.0238.000000T0000Z-190721T2315Z/
Sussex NJ-
634 PM EDT Sun Jul 21 2019
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SUSSEX COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4090 7427 4091 7433 4088 7434 4086 7432
4078 7438 4073 7437 4088 7468 4094 7464
4097 7464 4102 7458 4100 7429 4098 7430
4098 7428 4092 7429
TIME...MOT...LOC 2234Z 287DEG 30KT 4093 7453
$$
NJC027-212315-
/O.CON.KPHI.SV.W.0238.000000T0000Z-190721T2315Z/
Morris NJ-
634 PM EDT Sun Jul 21 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHEASTERN MORRIS COUNTY...
At 634 PM EDT, a severe thunderstorm was located over Rockaway, or 9
miles north of Morristown, moving east at 35 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, Mountain Lakes, Riverdale, Victory
Gardens, Parsippany and Pequannock Township.
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 this storm.
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 4090 7427 4091 7433 4088 7434 4086 7432
4078 7438 4073 7437 4088 7468 4094 7464
4097 7464 4102 7458 4100 7429 4098 7430
4098 7428 4092 7429
TIME...MOT...LOC 2234Z 287DEG 30KT 4093 7453
HAIL...<.75IN
WIND...60MPH
$$
Robertson213
WWUS51 KPHI 212252
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
652 PM EDT Sun Jul 21 2019
NJC027-212315-
/O.CON.KPHI.SV.W.0238.000000T0000Z-190721T2315Z/
Morris NJ-
652 PM EDT Sun Jul 21 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHEASTERN MORRIS COUNTY...
At 652 PM EDT, a severe thunderstorm was located over Parsippany, or
near Caldwell, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Morristown, Madison, Florham Park, East Hanover, Lincoln Park,
Kinnelon, Chatham, Boonton, Butler, Morris Plains, Mountain Lakes,
Riverdale, Parsippany, Pequannock Township and Hanover Township.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4081 7454 4101 7441 4100 7429 4098 7430
4098 7428 4092 7429 4090 7427 4091 7433
4088 7434 4086 7432 4078 7438 4073 7437
TIME...MOT...LOC 2252Z 287DEG 27KT 4085 7439
HAIL...<.75IN
WIND...60MPH
$$
Robertson316
WWUS51 KPHI 212300
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
700 PM EDT Sun Jul 21 2019
NJC027-212310-
/O.CAN.KPHI.SV.W.0238.000000T0000Z-190721T2315Z/
Morris NJ-
700 PM EDT Sun Jul 21 2019
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MORRIS COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.
LAT...LON 4081 7454 4101 7441 4100 7429 4098 7430
4098 7428 4092 7429 4090 7427 4091 7433
4088 7434 4086 7432 4078 7438 4073 7437
TIME...MOT...LOC 2257Z 287DEG 30KT 4083 7430
$$
RobertsonThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 3:15 AM EDT | Flash Flood Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more | 51 hr |
| Jul 21, 3:09 PM EDT | Heat Advisory | PHI | Burlington, Camden, Cape May, Cumberland, Gloucester, Mercer and 1 more | 27 hr |
| Jul 21, 5:04 PM EDT | Special Weather Statement | PHI | Sussex | 41 min |
| Jul 21, 5:34 PM EDT | Special Weather Statement | PHI | Sussex | 41 min |
| Jul 21, 6:14 PM EDT | Special Weather Statement | PHI | Morris, Sussex, Warren | 46 min |
| Jul 21, 6:38 PM EDT | Special Weather Statement | PHI | Hunterdon, Somerset | 37 min |
| Jul 21, 6:49 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Morris, Somerset, Warren | 41 min |
| Jul 21, 7:23 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth, Somerset | 52 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2019Every severe thunderstorm warning in 2019
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.