Alert archive / New Jersey / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 106, NWS Philadelphia/Mount Holly

October 2, 2018Morris County, Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 2, 2018, 8:56 PM EDT for Morris County, Sussex County, Warren County, New Jersey. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 2, 2018, 8:56 PM EDT (00:56 UTC)
Expired: Oct 2, 2018, 9:45 PM EDT
In force: 49 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 129 km from the middle of the area, began a volume at 00:59 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 2, 4:57 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.9 hours before the alert went out and 149 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: 610 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 634 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 197 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

As transmitted.

377 
WUUS51 KPHI 030056
SVRPHI
NJC027-037-041-030145-
/O.NEW.KPHI.SV.W.0106.181003T0056Z-181003T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
856 PM EDT TUE OCT 2 2018

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Morris County in northern New Jersey...
  Sussex County in northwestern New Jersey...
  Northeastern Warren County in northwestern New Jersey...

* Until 945 PM EDT.

* At 856 PM EDT, a severe thunderstorm was located over Five Points,
  or near Newton, moving east at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Newton, Hopatcong, Boonton, Blairstown, Mount Arlington, Franklin,
  Hamburg, Ogdensburg, Sussex, Branchville, Andover, Flatbrookville,
  Lake Mohawk, Greendell, Millbrook, Vernon Valley, Lake Telemark,
  Five Points, Green Pond and Pellettown.

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.

&&

A tornado watch remains in effect until 1100 PM EDT for northeastern
Pennsylvania. A tornado watch also remains in effect until midnight
EDT for northern and northwestern New Jersey.

LAT...LON 4124 7445 4115 7443 4109 7450 4107 7449
      4104 7450 4105 7445 4102 7443 4102 7441
      4091 7439 4098 7501 4108 7498 4109 7497
      4112 7497 4118 7488 4129 7454
TIME...MOT...LOC 0056Z 268DEG 18KT 4107 7482 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 2, 8:29 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	4 hr
Oct 2, 8:38 PM EDT	Tornado Warning	PHI	Morris, Sussex	22 min
Oct 2, 9:05 PM EDT	Areal Flood Advisory	PHI	Warren	4 hr
Oct 2, 9:51 PM EDT	Special Weather Statement	PHI	Hunterdon, Mercer, Middlesex, Somerset	114 min
Oct 2, 10:43 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	37 min
Oct 2, 11:24 PM EDT	Special Weather Statement	PHI	Burlington, Monmouth, Ocean	51 min
Oct 2, 11:32 PM EDT	Special Marine Warning	PHI		58 min
Oct 3, 12:00 AM EDT	Special Weather Statement	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	60 min
Oct 3, 12:25 AM EDT	Special Marine Warning	PHI		65 min
Oct 3, 3:16 AM EDT	Small Craft Advisory for Hazardous Seas	PHI		12 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.