Alert archive / New Jersey / Snow Squall Warnings in 2020

Snow Squall Warning 12, NWS Philadelphia/Mount Holly

January 8, 2020Morris County, Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this snow squall warning at Jan 8, 2020, 2:18 PM EST for Morris County, Sussex County, New Jersey. It was in force for 42 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: Jan 8, 2020, 2:18 PM EST (19:18 UTC)
Expired: Jan 8, 2020, 3:00 PM EST
In force: 42 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Morris County, NJ, Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 19:23 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, 7.3 hours before the alert went out and 134 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 864 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

964 
WWUS51 KPHI 081918
SQWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Mount Holly NJ
218 PM EST Wed Jan 8 2020

NJC027-037-082000-
/O.NEW.KPHI.SQ.W.0012.200108T1918Z-200108T2000Z/
Morris NJ-Sussex NJ-
218 PM EST Wed Jan 8 2020

The National Weather Service in Mount Holly NJ has issued a

* Snow Squall Warning for...
  Northeastern Morris County in northern New Jersey...
  Central Sussex County in northwestern New Jersey...

* Until 300 PM EST.

* At 218 PM EST, a dangerous snow squall was located over Newton,
  moving east at 35 mph.

  HAZARD...Extremely poor visibility in heavy snow and blowing snow. 
           Wind gusts greater than 40 mph.

  SOURCE...Radar indicated.

  IMPACT...Dangerous life-threatening travel.

* This includes Interstate 287 in New Jersey between mile markers 44
  and 54.
 
Locations impacted include...
Newton, Hopatcong, Lincoln Park, Kinnelon, Boonton, Butler, Franklin,
Mountain Lakes, Riverdale, Hamburg, Ogdensburg, Branchville, Andover,
Lake Mohawk, Pequannock Township, Lake Telemark, Green Pond,
Pellettown, Crandon Lakes and White Meadow Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.

There is no safe place on a highway when a snow squall hits.
Visibility and traction are immediately lost in whiteout conditions,
making it difficult or impossible to slow down and avoid stopped
vehicles. Delay travel or safely exit the highway before the snow
squall arrives.

&&

LAT...LON 4114 7444 4109 7450 4107 7449 4104 7450
      4105 7445 4102 7443 4103 7442 4100 7430
      4097 7428 4092 7429 4090 7427 4091 7433
      4087 7434 4103 7490 4117 7478
TIME...MOT...LOC 1918Z 286DEG 29KT 4109 7474 

$$

Staarmann

1 follow-up statement

888 
WWUS51 KPHI 081941
SQWPHI

Snow Squall Warning
National Weather Service Mount Holly NJ
240 PM EST Wed Jan 8 2020

NJC027-037-082000-
/O.CON.KPHI.SQ.W.0012.000000T0000Z-200108T2000Z/
Morris NJ-Sussex NJ-
240 PM EST Wed Jan 8 2020

...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 300 PM EST FOR
NORTHEASTERN MORRIS AND CENTRAL SUSSEX COUNTIES...

At 240 PM EST, a dangerous snow squall was located over Green Pond,
or 7 miles southwest of West Milford, moving east at 35 mph.

HAZARD...Extremely poor visibility in heavy snow and blowing snow. 
         Wind gusts greater than 40 mph.

SOURCE...Radar indicated.

IMPACT...Dangerous life-threatening travel.

This includes Interstate 287 in New Jersey between mile markers 44
and 54.
 
Locations impacted include...
Newton, Hopatcong, Lincoln Park, Kinnelon, Boonton, Butler, Franklin,
Mountain Lakes, Riverdale, Hamburg, Ogdensburg, Branchville, Andover,
Lake Mohawk, Pequannock Township, Lake Telemark, Green Pond,
Pellettown, Crandon Lakes and White Meadow Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.

There is no safe place on a highway when a snow squall hits.
Visibility and traction are immediately lost in whiteout conditions,
making it difficult or impossible to slow down and avoid stopped
vehicles. Delay travel or safely exit the highway before the snow
squall arrives.

&&

LAT...LON 4114 7444 4109 7450 4107 7449 4104 7450
      4105 7445 4102 7443 4103 7442 4100 7430
      4097 7428 4092 7429 4090 7427 4091 7433
      4087 7434 4103 7490 4117 7478
TIME...MOT...LOC 1940Z 286DEG 29KT 4104 7451 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 8, 7:49 AM EST	Snow Squall Warning	PHI	Warren	41 min
Jan 8, 8:28 AM EST	Snow Squall Warning	PHI	Cumberland, Gloucester, Salem	47 min
Jan 8, 8:30 AM EST	Snow Squall Warning	PHI	Sussex, Warren	45 min
Jan 8, 8:48 AM EST	Snow Squall Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Warren	42 min
Jan 8, 9:14 AM EST	Snow Squall Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	46 min
Jan 8, 9:57 AM EST	Special Weather Statement	PHI	Atlantic	33 min
Jan 8, 12:49 PM EST	Snow Squall Warning	PHI	Burlington, Camden	26 min
Jan 8, 1:08 PM EST	Snow Squall Warning	PHI	Burlington, Camden	37 min
Jan 8, 1:48 PM EST	Snow Squall Warning	PHI	Sussex, Warren	42 min
Jan 8, 2:10 PM EST	Special Weather Statement	PHI	Sussex	35 min
Jan 8, 2:32 PM EST	Special Weather Statement	PHI	Morris, Warren	28 min
Jan 8, 3:05 PM EST	Special Weather Statement	PHI	Hunterdon, Morris, Somerset, Warren	40 min
Jan 8, 4:24 PM EST	Special Weather Statement	PHI	Warren	36 min
Jan 8, 6:10 PM EST	Small Craft Advisory	PHI		13 hr

Nearby

Snow Squall Warnings in New Jersey, 2020 Every snow squall warning in 2020

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.