Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 83, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 13, 2017, 4:50 PM EDT for 6 counties in New Jersey. It was in force for 55 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 13, 2017, 4:50 PM EDT (20:50 UTC)
- Expired
- Jul 13, 2017, 5:45 PM EDT
- In force
- 55 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 20:52 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 13, 5:00 PM EDT | TSTM WND DMG | Readington Twp, NJ | MULTIPLE TELEPHONE POLES BLOWN DOWN ALONG 202. 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 |
|---|---|---|---|
| Jul 13, 1:57 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 13, 2:57 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.8 hours before the alert went out and 129 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
- 572 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1449 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.3
The text
As transmitted.
673
WUUS51 KPHI 132050
SVRPHI
NJC019-021-023-025-027-035-132145-
/O.NEW.KPHI.SV.W.0083.170713T2050Z-170713T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
450 PM EDT THU JUL 13 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Morris County in northern New Jersey...
Eastern Hunterdon County in northwestern New Jersey...
Northwestern Mercer County in central New Jersey...
Somerset County in northern New Jersey...
Northeastern Monmouth County in central New Jersey...
Middlesex County in northern New Jersey...
* Until 545 PM EDT
* At 449 PM EDT, a severe thunderstorm was located near White House
Station, or near Somerville, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* This severe thunderstorm will be near,
Belle Mead around 455 PM EDT.
Somerville and Bridgewater around 500 PM EDT.
Manville, Millstone and Martinsville around 505 PM EDT.
Bound Brook and Millington around 510 PM EDT.
Somerset, Middlesex and Society Hill around 515 PM EDT.
New Brunswick and North Brunswick Township around 520 PM EDT.
East Brunswick around 525 PM EDT.
Edison around 530 PM EDT.
Other locations impacted by this severe thunderstorm include Iselin,
Bernardsville, Watchung, Port Reading, Strathmore, Dunellen,
Milltown, Heathcote, South River and Laurence Harbor.
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 this storm. Move indoors
immediately. Remember...if you can hear thunder...you are close
enough to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4035 7412 4041 7487 4073 7484 4074 7437
4067 7446 4066 7445 4066 7441 4065 7440
4060 7446 4060 7421 4056 7421 4055 7425
4050 7426 4050 7428 4046 7426 4044 7420
4046 7418 4045 7412
TIME...MOT...LOC 2049Z 272DEG 26KT 4057 7473
HAIL...<.75IN
WIND...60MPH
$$
Robertson2 follow-up statements
935
WWUS51 KPHI 132120
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
520 PM EDT THU JUL 13 2017
NJC019-021-027-132130-
/O.CAN.KPHI.SV.W.0083.000000T0000Z-170713T2145Z/
Morris NJ-Hunterdon NJ-Mercer NJ-
520 PM EDT THU JUL 13 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORRIS...EASTERN
HUNTERDON AND NORTHWESTERN MERCER COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A severe thunderstorm watch remains in effect until 900 PM EDT for
northern and central New Jersey.
LAT...LON 4041 7468 4060 7443 4060 7427 4059 7421
4056 7421 4055 7425 4050 7426 4050 7428
4046 7426 4044 7420 4046 7418 4045 7412
4035 7412 4038 7453
TIME...MOT...LOC 2120Z 274DEG 35KT 4045 7442
$$
NJC023-025-035-132145-
/O.CON.KPHI.SV.W.0083.000000T0000Z-170713T2145Z/
Somerset NJ-Monmouth NJ-Middlesex NJ-
520 PM EDT THU JUL 13 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHEASTERN SOMERSET...NORTHEASTERN MONMOUTH AND MIDDLESEX
COUNTIES...
At 520 PM EDT, a severe thunderstorm was located over East Brunswick,
or over New Brunswick, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
This severe storm will be near...
Old Bridge around 525 PM EDT.
Perth Amboy, Sayreville and Brownville around 530 PM EDT.
Matawan around 535 PM EDT.
Lincroft around 540 PM EDT.
Keansburg around 545 PM EDT.
Other locations impacted by this severe thunderstorm include Madison
Park, Highland Park, South Plainfield, Iselin, Metuchen, Sewaren,
Keyport, Port Reading, Strathmore and Milltown.
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...and
the storm will affect the beaches. For your safety...immediately move
off the beach and seek shelter indoors.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4041 7468 4060 7443 4060 7427 4059 7421
4056 7421 4055 7425 4050 7426 4050 7428
4046 7426 4044 7420 4046 7418 4045 7412
4035 7412 4038 7453
TIME...MOT...LOC 2120Z 274DEG 35KT 4045 7442
HAIL...<.75IN
WIND...60MPH
$$
Robertson788
WWUS51 KPHI 132139
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
539 PM EDT THU JUL 13 2017
NJC023-025-035-132147-
/O.EXP.KPHI.SV.W.0083.000000T0000Z-170713T2145Z/
Somerset NJ-Monmouth NJ-Middlesex NJ-
539 PM EDT THU JUL 13 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SOMERSET...
NORTHEASTERN MONMOUTH AND MIDDLESEX COUNTIES WILL EXPIRE AT 545 PM
EDT...
The storm which prompted the warning has moved out of Somerset
County. Therefore the warning will be allowed to expire. A Severe
Thunderstorm Warning still remains in effect for southeastern
Middlesex and Monmouth Counties until 615 PM.
A severe thunderstorm watch remains in effect until 900 PM EDT for
northern and central New Jersey.
LAT...LON 4041 7468 4060 7443 4060 7427 4059 7421
4056 7421 4055 7425 4050 7426 4050 7428
4046 7426 4044 7420 4046 7418 4045 7412
4035 7412 4038 7453
TIME...MOT...LOC 2137Z 272DEG 26KT 4045 7428
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 8:22 PM EDT | Special Weather Statement | PHI | Morris | 53 min |
| Jul 12, 9:17 PM EDT | Special Weather Statement | PHI | Morris | 28 min |
| Jul 13, 3:25 PM EDT | Special Weather Statement | PHI | Sussex | 50 min |
| Jul 13, 3:28 PM EDT | Special Weather Statement | PHI | Middlesex | 47 min |
| Jul 13, 3:58 PM EDT | Areal Flood Advisory | PHI | Sussex | 4 hr |
| Jul 13, 4:06 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 114 min |
| Jul 13, 4:40 PM EDT | Special Weather Statement | PHI | Hunterdon, Middlesex, Somerset | 50 min |
| Jul 13, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 40 min |
| Jul 13, 4:58 PM EDT | Special Marine Warning | PHI | 62 min | |
| Jul 13, 5:07 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Mercer, Middlesex, Monmouth, Ocean | 7 hr |
| Jul 13, 5:14 PM EDT | Special Weather Statement | PHI | Mercer | 46 min |
| Jul 13, 5:21 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 54 min |
| Jul 13, 5:31 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 3 hr |
| Jul 13, 5:33 PM EDT | Special Marine Warning | PHI | 87 min | |
| Jul 13, 5:39 PM EDT | Special Weather Statement | PHI | Mercer | 36 min |
| Jul 13, 6:07 PM EDT | Special Weather Statement | PHI | Atlantic | 23 min |
| Jul 13, 6:07 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 25 min |
| Jul 13, 6:09 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 13, 6:20 PM EDT | Special Weather Statement | PHI | Burlington | 40 min |
| Jul 13, 6:28 PM EDT | Special Weather Statement | PHI | Mercer | 47 min |
| Jul 13, 6:44 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Monmouth, Ocean | 45 min |
| Jul 13, 6:55 PM EDT | Special Marine Warning | PHI | 95 min | |
| Jul 13, 7:00 PM EDT | Special Marine Warning | PHI | 90 min | |
| Jul 13, 7:12 PM EDT | Special Weather Statement | PHI | Camden | 48 min |
| Jul 13, 7:55 PM EDT | Special Weather Statement | PHI | Ocean | 35 min |
| Jul 13, 7:58 PM EDT | Special Weather Statement | PHI | Cumberland | 32 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2017Every severe thunderstorm warning in 2017
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.