Alert archive / New Jersey / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 49, NWS Philadelphia/Mount Holly

July 4, 2018Morris County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 4, 2018, 1:57 PM EDT for Morris County, Warren County, New Jersey. It was in force for 48 min. 2 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 4, 2018, 1:57 PM EDT (17:57 UTC)
Expired: Jul 4, 2018, 2:45 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Morris County, NJ, Warren County, NJ

What was reported inside it

Time	Report	Where	Remark
Jul 4, 2:04 PM EDT	TSTM WND DMG	Great Meadows-Vienna, NJ	TREE REPORTED DOWN AT THE INTERSECTION OF BARKER MILLS ROAD AND ROUTE 46.
Jul 4, 2:10 PM EDT	TSTM WND DMG	Great Meadows, NJ	TREE ON WIRES ON CEMETERY ROAD IN INDEPENDENCE TWP. 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, 6.0 hours before the alert went out and 167 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 145 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 1091 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

693 
WUUS51 KPHI 041757
SVRPHI
NJC027-041-041845-
/O.NEW.KPHI.SV.W.0049.180704T1757Z-180704T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
157 PM EDT WED JUL 4 2018

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern Morris County in northern New Jersey...
  East central Warren County in northwestern New Jersey...

* Until 245 PM EDT.

* At 157 PM EDT, a severe thunderstorm was located over Hackettstown,
  or 12 miles south of Newton, and is nearly stationary.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Hackettstown, Washington, Oxford, Hope, Chester, Great
  Meadows-Vienna, Allamuchy-Panther Valley, Budd Lake, Long Valley,
  Beatyestown, Brass Castle and Beattyestown.

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 4092 7477 4092 7474 4076 7466 4075 7483
      4078 7488 4078 7490 4074 7495 4073 7501
      4093 7498 4095 7480
TIME...MOT...LOC 1757Z 358DEG 2KT 4088 7484 

HAIL...0.75IN
WIND...60MPH
 
$$

CMS

2 follow-up statements

720 
WWUS51 KPHI 041821
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
221 PM EDT WED JUL 4 2018

NJC027-041-041845-
/O.CON.KPHI.SV.W.0049.000000T0000Z-180704T1845Z/
Morris NJ-Warren NJ-
221 PM EDT WED JUL 4 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR WEST CENTRAL MORRIS AND EAST CENTRAL WARREN COUNTIES...

At 220 PM EDT, a severe thunderstorm was located over Great
Meadows-Vienna, or 15 miles southwest of Newton, and is nearly
stationary.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Hackettstown, Washington, Oxford, Hope, Great Meadows-Vienna,
Allamuchy-Panther Valley, Beatyestown, Brass Castle, Long Valley and
Beattyestown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4095 7482 4095 7480 4092 7477 4075 7481
      4075 7483 4078 7488 4078 7490 4074 7495
      4073 7501 4093 7498
TIME...MOT...LOC 1820Z 033DEG 4KT 4085 7489 

HAIL...0.75IN
WIND...60MPH
 
$$

CMS

706 
WWUS51 KPHI 041838
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
238 PM EDT WED JUL 4 2018

NJC027-041-041848-
/O.EXP.KPHI.SV.W.0049.000000T0000Z-180704T1845Z/
Morris NJ-Warren NJ-
238 PM EDT WED JUL 4 2018

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MORRIS AND EAST
CENTRAL WARREN COUNTIES WILL EXPIRE AT 245 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 4095 7482 4095 7480 4092 7477 4075 7481
      4075 7483 4078 7488 4078 7490 4074 7495
      4073 7501 4093 7498
TIME...MOT...LOC 1838Z 358DEG 2KT 4084 7489 

$$

CMS

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 4, 9:35 AM EDT	Areal Flood Advisory	PHI	Sussex	100 min
Jul 4, 12:15 PM EDT	Areal Flood Advisory	PHI	Sussex	4 hr
Jul 4, 12:53 PM EDT	Special Weather Statement	PHI	Sussex	22 min
Jul 4, 1:11 PM EDT	Special Weather Statement	PHI	Sussex	34 min
Jul 4, 1:22 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex	3 hr
Jul 4, 1:44 PM EDT	Special Weather Statement	PHI	Sussex	31 min
Jul 4, 1:48 PM EDT	Special Weather Statement	PHI	Warren	27 min
Jul 4, 2:02 PM EDT	Special Weather Statement	PHI	Sussex	28 min
Jul 4, 2:15 PM EDT	Areal Flood Advisory	PHI	Warren	3 hr
Jul 4, 2:18 PM EDT	Special Weather Statement	PHI	Warren	27 min
Jul 4, 2:31 PM EDT	Special Weather Statement	PHI	Warren	44 min
Jul 4, 2:48 PM EDT	Areal Flood Advisory	PHI	Morris	3 hr
Jul 4, 3:12 PM EDT	Special Weather Statement	PHI	Warren	33 min
Jul 4, 3:32 PM EDT	Special Weather Statement	PHI	Warren	28 min
Jul 4, 3:40 PM EDT	Severe Thunderstorm Warning	PHI	Warren	50 min
Jul 4, 3:59 PM EDT	Areal Flood Advisory	PHI	Warren	4 hr
Jul 4, 4:28 PM EDT	Areal Flood Advisory	PHI	Warren	4 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2018 Every 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.