Alert archive / New Jersey / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 83, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 17, 2018, 8:17 PM EDT for 5 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 43 min. 6 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
- Aug 17, 2018, 8:17 PM EDT (00:17 UTC)
- Expired
- Aug 17, 2018, 9:00 PM EDT
- In force
- 43 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 106 km from the middle of the area, began a volume at 00:19 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 |
|---|---|---|---|
| Aug 17, 8:17 PM EDT | TSTM WND DMG | 1 Ne Penwell, NJ | TREE DOWN NEAR INTERSECTION OF RT 57 AND WATTERS RD. TIME ESTIMATED FROM RADAR. |
| Aug 17, 8:19 PM EDT | TSTM WND DMG | 1 Ne Beattyestown, NJ | DOWNED TREE NEAR INTERSECTION OF ALLEN ROAD AND SUNNYVIEW AVENUE IN MANSFIELD TWP. ANOTHER DOWNED TREE AT ROUTE 57 NEAR WATTERS ROAD. TIME ESTIMATED FROM RADAR. |
| Aug 17, 8:19 PM EDT | TSTM WND DMG | Washington, NJ | SEVERAL REPORTS OF LARGE TREES DOWN IN WASHINGTON TWP...INCLUDING ON BRASS CASTLE ROAD AND ON BARTELY ROAD. TIME ESTIMATED FROM RADAR. |
| Aug 17, 8:23 PM EDT | TSTM WND DMG | Hampton Junction, NJ | TREES DOWN ONTO WIRES. WIRES DOWNED. |
| Aug 17, 8:35 PM EDT | TSTM WND GST 65 | Lebanon, NJ | |
| Aug 17, 8:50 PM EDT | TSTM WND DMG | Far Hills, NJ | REPORT OF TREES DOWN IN FAR HILLS AND BRIDGEWATER TOWNSHIP. 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 |
|---|---|---|---|
| Aug 17, 3:44 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 0.3 hours before the alert went out and 168 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
- 802 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 900 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
141
WUUS51 KPHI 180017
SVRPHI
NJC019-027-035-037-041-PAC017-180100-
/O.NEW.KPHI.SV.W.0083.180818T0017Z-180818T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
817 PM EDT FRI AUG 17 2018
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Morris County in northern New Jersey...
Hunterdon County in northwestern New Jersey...
Southwestern Sussex County in northwestern New Jersey...
Warren County in northwestern New Jersey...
Western Somerset County in northern New Jersey...
North central Bucks County in southeastern Pennsylvania...
* Until 900 PM EDT.
* At 816 PM EDT, severe thunderstorms were located along a line
extending from Blairstown to Beatyestown to Milford, moving
northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Morristown, Somerville, Newton, Bridgewater, Dover, Hopatcong,
Manville, Hackettstown, Wharton, Washington, Rockaway, Blairstown,
Morris Plains, Mount Arlington, Franklin, Mendham, Flemington,
Mountain Lakes, Tinicum and High Bridge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4114 7460 4092 7443 4045 7464 4043 7520
4075 7508 4085 7507 4086 7505 4096 7506
TIME...MOT...LOC 0016Z 242DEG 36KT 4100 7498 4080 7484 4057 7508
HAIL...<.75IN
WIND...60MPH
$$
CMS3 follow-up statements
357
WWUS51 KPHI 180035
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
835 PM EDT FRI AUG 17 2018
NJC019-027-035-037-041-PAC017-180100-
/O.CON.KPHI.SV.W.0083.000000T0000Z-180818T0100Z/
Morris NJ-Hunterdon NJ-Sussex NJ-Warren NJ-Somerset NJ-Bucks PA-
835 PM EDT FRI AUG 17 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR MORRIS...HUNTERDON...SOUTHWESTERN SUSSEX...EASTERN WARREN...
WESTERN SOMERSET AND NORTH CENTRAL BUCKS COUNTIES...
At 835 PM EDT, severe thunderstorms were located along a line
extending from near Newton to Succasunna-Kenvil to near Byram, moving
northeast at 40 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Morristown, Somerville, Newton, Bridgewater, Dover, Hopatcong,
Manville, Hackettstown, Wharton, Washington, Rockaway, Morris Plains,
Mount Arlington, Franklin, Mendham, Flemington, Mountain Lakes,
Tinicum, High Bridge and Stanhope.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4114 7460 4092 7443 4045 7464 4043 7520
4057 7515 4077 7496 4104 7485
TIME...MOT...LOC 0035Z 236DEG 36KT 4108 7478 4088 7464 4046 7501
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
$$
CMS874
WWUS51 KPHI 180052
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
852 PM EDT FRI AUG 17 2018
NJC041-PAC017-180101-
/O.CAN.KPHI.SV.W.0083.000000T0000Z-180818T0100Z/
Warren NJ-Bucks PA-
852 PM EDT FRI AUG 17 2018
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WARREN AND NORTH
CENTRAL BUCKS 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 1100 PM EDT for
northern and northwestern New Jersey.
LAT...LON 4114 7460 4092 7443 4045 7464 4044 7490
4044 7502 4059 7499 4078 7484 4091 7478
4091 7477 4092 7478 4110 7469
TIME...MOT...LOC 0051Z 242DEG 36KT 4115 7460 4095 7446 4053 7483
$$
NJC019-027-035-037-180100-
/O.CON.KPHI.SV.W.0083.000000T0000Z-180818T0100Z/
Morris NJ-Hunterdon NJ-Sussex NJ-Somerset NJ-
852 PM EDT FRI AUG 17 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR CENTRAL MORRIS...EASTERN HUNTERDON...SOUTH CENTRAL SUSSEX AND
WESTERN SOMERSET COUNTIES...
At 851 PM EDT, severe thunderstorms were located along a line
extending from Hamburg to near Lake Telemark to near Flemington,
moving northeast at 40 mph.
HAZARD...70 mph wind gusts.
SOURCE...Emergency management. Several reports of wind damage have
been received from Warren and Hunterdon Counties.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Morristown, Somerville, Bridgewater, Dover, Hopatcong, Manville,
Wharton, Rockaway, Morris Plains, Mount Arlington, Franklin, Mendham,
Flemington, Mountain Lakes, High Bridge, Stanhope, Netcong, Clinton,
Peapack And Gladstone and Ogdensburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4114 7460 4092 7443 4045 7464 4044 7490
4044 7502 4059 7499 4078 7484 4091 7478
4091 7477 4092 7478 4110 7469
TIME...MOT...LOC 0051Z 242DEG 36KT 4115 7460 4095 7446 4053 7483
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
$$
CMS110
WWUS51 KPHI 180059
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
859 PM EDT FRI AUG 17 2018
NJC019-027-035-037-180109-
/O.EXP.KPHI.SV.W.0083.000000T0000Z-180818T0100Z/
Morris NJ-Hunterdon NJ-Sussex NJ-Somerset NJ-
859 PM EDT FRI AUG 17 2018
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MORRIS...EASTERN
HUNTERDON...SOUTH CENTRAL SUSSEX AND WESTERN SOMERSET COUNTIES WILL
EXPIRE AT 900 PM EDT...
A severe thunderstorm watch remains in effect until 1100 PM EDT for
northern and northwestern New Jersey.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
in Mount Holly NJ.
Remember, a Severe Thunderstorm Warning remains in effect for
portions of Morris, Sussex, Somerset, and Hunterdon Counties until
930 pm.
LAT...LON 4114 7460 4092 7443 4045 7464 4044 7490
4044 7502 4059 7499 4078 7484 4091 7478
4091 7477 4092 7478 4110 7469
TIME...MOT...LOC 0059Z 242DEG 36KT 4118 7452 4098 7438 4056 7475
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 8:47 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex | 43 min |
| Aug 17, 8:48 PM EDT | Special Weather Statement | PHI | Sussex | 27 min |
| Aug 17, 9:26 PM EDT | Special Weather Statement | PHI | Mercer, Middlesex, Somerset | 34 min |
| Aug 17, 10:59 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Middlesex, Morris, Somerset, Warren | 75 min |
| Aug 17, 11:25 PM EDT | Special Weather Statement | PHI | Somerset | 35 min |
| Aug 17, 11:30 PM EDT | Flash Flood Warning | PHI | Hunterdon, Middlesex, Morris, Somerset | 4 hr |
| Aug 17, 11:41 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 34 min |
| Aug 17, 11:52 PM EDT | Special Weather Statement | PHI | Middlesex | 23 min |
| Aug 18, 12:56 AM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 4 hr |
| Aug 18, 2:37 AM EDT | Special Weather Statement | PHI | Ocean | 23 min |
| Aug 18, 2:38 AM EDT | Special Marine Warning | PHI | 52 min | |
| Aug 18, 2:41 AM EDT | Special Weather Statement | PHI | Atlantic, Cumberland | 34 min |
| Aug 18, 2:46 AM EDT | Severe Thunderstorm Warning | PHI | Ocean | 14 min |
| Aug 18, 3:15 AM EDT | Special Marine Warning | PHI | 30 min | |
| Aug 18, 3:16 AM EDT | Flash Flood Watch | PHI | Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 7 more | 20 hr |
| Aug 18, 3:34 PM EDT | Special Weather Statement | PHI | Sussex | 41 min |
| Aug 18, 3:40 PM EDT | Small Craft Advisory | PHI | 45 hr | |
| Aug 18, 4:14 PM EDT | Special Weather Statement | PHI | Sussex | 46 min |
| Aug 18, 4:33 PM EDT | Special Weather Statement | PHI | Gloucester | 42 min |
| Aug 18, 5:16 PM EDT | Special Weather Statement | PHI | Burlington, Camden | 44 min |
| Aug 18, 5:44 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden | 98 min |
| Aug 18, 5:55 PM EDT | Special Weather Statement | PHI | Burlington | 35 min |
| Aug 18, 6:17 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 43 min |
| Aug 18, 6:31 PM EDT | Special Marine Warning | PHI | 119 min | |
| Aug 18, 6:44 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 29 min |
| Aug 17, 8:04 PM EDT | Special Weather Statement | PHI | Monroe | 41 min |
| Aug 17, 8:54 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 36 min |
| Aug 18, 3:20 PM EDT | Special Weather Statement | PHI | Chester | 40 min |
| Aug 18, 4:54 PM EDT | Special Weather Statement | PHI | Philadelphia | 21 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2018Severe Thunderstorm Warnings in Pennsylvania, 2018Every severe thunderstorm warning in 2018
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.