Alert archive / New Jersey / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 53, NWS Philadelphia/Mount Holly

July 27, 2018Morris County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2018, 2:04 PM EDT for Morris County, Somerset County, New Jersey. It was in force for 41 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: Jul 27, 2018, 2:04 PM EDT (18:04 UTC)
Expired: Jul 27, 2018, 2:45 PM EDT
In force: 41 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Morris County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 88 km from the middle of the area, began a volume at 18:05 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
Jul 27, 1:17 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.1 hours before the alert went out and 133 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: 752 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 998 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

939 
WUUS51 KPHI 271804
SVRPHI
NJC027-035-271845-
/O.NEW.KPHI.SV.W.0053.180727T1804Z-180727T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
204 PM EDT FRI JUL 27 2018

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southeastern Morris County in northern New Jersey...
  Northern Somerset County in northern New Jersey...

* Until 245 PM EDT.

* At 204 PM EDT, a severe thunderstorm was located near Madison, or
  near Morristown, moving east at 15 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, Chatham, Morris
  Plains, Mendham, Peapack And Gladstone, Chester, Far Hills,
  Millington, Basking Ridge, Bernardsville, Watchung and Hanover
  Township.

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 4082 7434 4079 7437 4076 7438 4075 7436
      4074 7437 4067 7446 4066 7445 4066 7440
      4063 7442 4064 7472 4079 7472 4086 7432
TIME...MOT...LOC 1804Z 263DEG 14KT 4073 7448 

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

CMS

1 follow-up statement

655 
WWUS51 KPHI 271835
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
235 PM EDT FRI JUL 27 2018

NJC027-035-271845-
/O.EXP.KPHI.SV.W.0053.000000T0000Z-180727T1845Z/
Morris NJ-Somerset NJ-
235 PM EDT FRI JUL 27 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORRIS AND
NORTHERN SOMERSET COUNTIES WILL EXPIRE AT 245 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until 1000 PM EDT for
northern and northwestern New Jersey.

LAT...LON 4082 7434 4079 7437 4076 7438 4075 7436
      4074 7437 4067 7446 4066 7445 4066 7440
      4063 7442 4064 7472 4079 7472 4086 7432
TIME...MOT...LOC 1835Z 263DEG 14KT 4074 7434 

$$

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 9:29 AM EDT	Special Weather Statement	PHI	Salem	61 min
Jul 27, 9:50 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Cumberland, Gloucester, Hunterdon, Mercer and 7 more	13 hr
Jul 27, 10:08 AM EDT	Special Weather Statement	PHI	Cumberland	67 min
Jul 27, 10:34 AM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	10 hr
Jul 27, 11:11 AM EDT	Special Weather Statement	PHI	Atlantic	64 min
Jul 27, 12:10 PM EDT	Special Weather Statement	PHI	Atlantic	65 min
Jul 27, 12:24 PM EDT	Areal Flood Advisory	PHI	Cape May	114 min
Jul 27, 1:15 PM EDT	Special Weather Statement	PHI	Salem	45 min
Jul 27, 1:23 PM EDT	Special Weather Statement	PHI	Morris	52 min
Jul 27, 1:31 PM EDT	Special Marine Warning	PHI		59 min
Jul 27, 1:38 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	4 hr
Jul 27, 2:14 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	46 min
Jul 27, 2:19 PM EDT	Special Marine Warning	PHI		56 min
Jul 27, 2:22 PM EDT	Special Marine Warning	PHI		53 min
Jul 27, 2:26 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	6 hr
Jul 27, 2:40 PM EDT	Special Marine Warning	PHI		65 min
Jul 27, 2:59 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	46 min
Jul 27, 3:09 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	6 hr
Jul 27, 3:14 PM EDT	Special Marine Warning	PHI		61 min
Jul 27, 3:45 PM EDT	Special Weather Statement	PHI	Cumberland	30 min
Jul 27, 4:12 PM EDT	Special Marine Warning	PHI		63 min
Jul 27, 4:18 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	42 min
Jul 27, 4:19 PM EDT	Flash Flood Warning	PHI	Cumberland	4 hr
Jul 27, 4:25 PM EDT	Areal Flood Advisory	PHI	Middlesex, Somerset	7 hr
Jul 27, 4:32 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Somerset	43 min
Jul 27, 4:43 PM EDT	Areal Flood Advisory	PHI	Mercer	5 hr
Jul 27, 4:54 PM EDT	Flash Flood Warning	PHI	Middlesex	4 hr
Jul 27, 5:03 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cumberland	4 hr
Jul 27, 5:23 PM EDT	Special Marine Warning	PHI		67 min
Jul 27, 5:46 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	4 hr
Jul 27, 6:10 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Monmouth, Somerset	4 hr
Jul 27, 7:14 PM EDT	Special Marine Warning	PHI		61 min
Jul 27, 7:15 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	4 hr
Jul 27, 7:51 PM EDT	Special Weather Statement	PHI	Atlantic	39 min
Jul 27, 7:55 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Somerset, Warren	108 min

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.