Alert archive / New Jersey / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

August 2, 2018Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 2, 2018, 3:41 PM EDT for Morris County, New Jersey. It was in force for 34 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: Aug 2, 2018, 3:41 PM EDT (19:41 UTC)
Expired: Aug 2, 2018, 4:15 PM EDT
In force: 34 min
Issued by: NWS Philadelphia/Mount Holly

County Morris County, NJ

The radar

The Philadelphia radar (KDIX), 108 km from the middle of the area, began a volume at 19:44 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.7 hours before the alert went out and 131 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: 1199 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 650 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

807 
WWUS81 KPHI 021941
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
341 PM EDT THU AUG 2 2018

NJZ001-008>010-022015-
Morris-Hunterdon-Sussex-Somerset-
341 PM EDT THU AUG 2 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT MORRIS...NORTHEASTERN
HUNTERDON...EASTERN SUSSEX AND NORTHERN SOMERSET COUNTIES...

At 341 PM EDT, radar indicated thunderstorms were located along a 
line extending from near Unionville to near Lebanon. Movement was 
east at 30 mph.

Winds up to 40 mph are possible with these storms.

Locations impacted include...
Morristown, Dover, Madison, Hopatcong, Florham Park, East Hanover,
Lincoln Park, Kinnelon, Chatham, Boonton, Butler, Wharton, Rockaway,
Morris Plains, Mount Arlington, Franklin, Mendham, Mountain Lakes,
Stanhope and Riverdale.

Heavy rainfall is also occurring with these storms, and may cause 
localized flooding. Do not drive your vehicle through flooded 
roadways.

LAT...LON 4120 7437 4110 7449 4104 7450 4105 7445
      4102 7443 4100 7430 4097 7428 4090 7429
      4091 7430 4089 7434 4086 7432 4079 7437
      4074 7437 4067 7446 4065 7440 4064 7441
      4057 7486 4131 7459
TIME...MOT...LOC 1941Z 249DEG 25KT 4133 7455 4066 7479 

$$

Kruzdlo

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 10:40 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	37 min
Aug 1, 11:35 PM EDT	Severe Thunderstorm Warning	PHI	Salem	20 min
Aug 2, 3:31 AM EDT	Flash Flood Watch	PHI	Morris, Sussex, Warren	55 hr
Aug 2, 1:41 PM EDT	Special Weather Statement	PHI	Burlington	34 min
Aug 2, 2:09 PM EDT	Special Weather Statement	PHI	Monmouth	36 min
Aug 2, 6:02 PM EDT	Special Marine Warning	PHI		58 min
Aug 1, 8:59 PM EDT	Special Weather Statement	PHI	Berks	61 min
Aug 1, 9:54 PM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh	66 min
Aug 2, 1:50 PM EDT	Special Weather Statement	PHI	Lehigh	25 min
Aug 2, 2:19 PM EDT	Special Weather Statement	PHI	Northampton	41 min
Aug 1, 10:58 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	47 min
Aug 2, 5:36 PM EDT	Special Weather Statement	PHI	New Castle	24 min
Aug 2, 5:40 PM EDT	Special Weather Statement	PHI	Kent	35 min
Aug 2, 4:37 PM EDT	Special Weather Statement	PHI	Queen Anne's	23 min
Aug 2, 5:03 PM EDT	Special Weather Statement	PHI	Kent	27 min
Aug 2, 5:34 PM EDT	Special Weather Statement	PHI	Queen Anne's	26 min
Aug 2, 6:07 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	38 min

Nearby

Special Weather Statements in New Jersey, 2018 Every special weather statement 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.