Alert archive / Pennsylvania / Snow Squall Warnings in 2020

Snow Squall Warning 14, NWS Philadelphia/Mount Holly

January 16, 2020Monroe County, Northampton County, Pennsylvania; Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this snow squall warning at Jan 16, 2020, 4:18 PM EST for Monroe County, Northampton County, Pennsylvania; Warren County, New Jersey. It was in force for 45 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 16, 2020, 4:18 PM EST (21:18 UTC)
Expired
Jan 16, 2020, 5:03 PM EST
In force
45 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Warren County, NJ, Monroe County, PA, Northampton County, PA

The radar

The Binghamton radar (KBGM), 133 km from the middle of the area, began a volume at 21:20 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, 9.3 hours before the alert went out and 202 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2020-01-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2020-01-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 264 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
466 m above ground
0-6 km bulk shear
85 kt
0-1 km storm-relative helicity
264 m²/s²
0-3 km storm-relative helicity
357 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

193 
WWUS51 KPHI 162120
SQWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Mount Holly NJ
418 PM EST Thu Jan 16 2020

NJC041-PAC089-095-162215-
/O.NEW.KPHI.SQ.W.0014.200116T2118Z-200116T2215Z/
Warren NJ-Monroe PA-Northampton PA-
418 PM EST Thu Jan 16 2020

The National Weather Service in Mount Holly NJ has issued a

* Snow Squall Warning for...
  Northwestern Warren County in northwestern New Jersey...
  Northern Monroe County in northeastern Pennsylvania...
  Northeastern Northampton County in eastern Pennsylvania...

* Until 515 PM EST.

* At 418 PM EST, a dangerous snow squall was located along a line
  extending from near Lake Carey to Tobyhanna, moving southeast at 45
  mph.

  HAZARD...Poor visibility in heavy snow and blowing snow. Wind 
           gusts of 40 to 50 mph.

  SOURCE...Radar indicated.

  IMPACT...Dangerous life-threatening travel.

* This includes the following highways...
   Interstate 80 in New Jersey between mile markers 0 and 8.
   Interstate 80 in Pennsylvania between mile markers 298 and 314.
   Interstate 380 in Pennsylvania between mile markers 0 and 12.

Locations impacted include...
Mount Pocono, East Stroudsburg, Tobyhanna, Blairstown, Henryville,
Werry Lake, Pocono Pines, Delaware Water Gap, Skytop, Tannersville,
Mountainhome, Alpine Mountain, Analomink, Canadensis, Scotrun,
Columbia, Echo Lake, Paradise Valley, Gouldsboro State Park and
Stroudsburg.

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.

Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.

&&

LAT...LON 4115 7515 4114 7509 4108 7503 4109 7500
      4101 7490 4087 7512 4119 7557 4123 7554
      4122 7551 4123 7551 4123 7549 4125 7513
TIME...MOT...LOC 2118Z 312DEG 39KT 4157 7593 4117 7538 

$$

Robertson
1 follow-up statement
137 
WWUS51 KPHI 162205
SQWPHI

Snow Squall Warning
National Weather Service Mount Holly NJ
503 PM EST Thu Jan 16 2020

NJC041-PAC089-095-162213-
/O.CAN.KPHI.SQ.W.0014.000000T0000Z-200116T2215Z/
Warren NJ-Monroe PA-Northampton PA-
503 PM EST Thu Jan 16 2020

...THE SNOW SQUALL WARNING FOR NORTHWESTERN WARREN...NORTHERN MONROE
AND NORTHEASTERN NORTHAMPTON COUNTIES IS CANCELLED...

The snow squall which prompted the warning has weakened. Therefore, 
the snow squall warning has been cancelled. Areas of snow and 
blowing snow will continue to make travel difficult so a Special 
Weather Statement will be continued.

LAT...LON 4115 7515 4114 7509 4108 7503 4109 7500
      4101 7490 4087 7512 4119 7557 4123 7554
      4122 7551 4123 7551 4123 7549 4125 7513
TIME...MOT...LOC 2200Z 312DEG 39KT 4157 7593 4117 7538 

$$

Robertson

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 16, 1:39 PM ESTSpecial Weather StatementPHICarbon, Monroe, Northampton21 min
Jan 16, 2:11 PM ESTSpecial Weather StatementPHIMonroe34 min
Jan 16, 2:19 PM ESTSpecial Weather StatementPHINorthampton26 min
Jan 16, 1:53 PM ESTSnow Squall WarningPHIMorris, Somerset, Sussex, Warren23 min

Nearby

Snow Squall Warnings in Pennsylvania, 2020Snow Squall Warnings in New Jersey, 2020Every 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.