Alert archive / Pennsylvania / Snow Squall Warnings in 2021

Snow Squall Warning 2, NWS State College, PA

January 22, 2021Lycoming County, Potter County, Tioga County, Pennsylvania

NWS State College, PA issued this snow squall warning at Jan 22, 2021, 12:46 PM EST for Lycoming County, Potter County, Tioga County, Pennsylvania. It was in force for 44 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 22, 2021, 12:46 PM EST (17:46 UTC)
Expired: Jan 22, 2021, 1:30 PM EST
In force: 44 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Lycoming County, PA, Potter County, PA, Tioga County, PA

The radar

The State College radar (KCCX), 91 km from the middle of the area, began a volume at 17:50 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.8 hours before the alert went out and 187 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: 919 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

040 
WWUS51 KCTP 221749
SQWCTP

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service State College PA
1246 PM EST Fri Jan 22 2021

PAC081-105-117-221830-
/O.NEW.KCTP.SQ.W.0002.210122T1746Z-210122T1830Z/
Lycoming PA-Potter PA-Tioga PA-
1246 PM EST Fri Jan 22 2021

The National Weather Service in State College PA has issued a

* Snow Squall Warning for...
  Northwestern Lycoming County in north central Pennsylvania...
  Southeastern Potter County in north central Pennsylvania...
  Southern Tioga County in north central Pennsylvania...

* Until 130 PM EST.

* At 1246 PM EST, a dangerous snow squall was located along a line
  extending from near Morris to near Truman, moving east at 30 mph.

  HAZARD...Extremely poor visibility in snow and blowing snow. Wind 
           gusts up to 30 mph.

  SOURCE...Radar indicated.

  IMPACT...Expect hazardous road conditions.

This squall will impact SR 15 between Mansfield and Trout Run, 
creating extremely dangerous travel conditions.

Locations impacted include...
Mansfield, Wellsboro, Morris, Blossburg, Covington, Arnot, Leetonia,
Cherry Springs State Park, Leonard Harrison State Park, Ralston,
Ogdensburg, Cedar Run, Cammal, Ole Bull State Park, Slate Run,
English Center, Buttonwood and Ski Sawmill Ski Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Reduce your speed and turn on headlights! During snow squalls, the 
visibility may suddenly drop to near zero in whiteout conditions. 
Exit highways safely and consider delaying travel until the squall 
passes.

LAT...LON 4173 7689 4160 7688 4159 7681 4149 7678
      4134 7748 4137 7754 4148 7760 4148 7779
      4157 7800 4164 7805 4168 7771 4180 7708
TIME...MOT...LOC 1746Z 285DEG 27KT 4167 7729 4148 7841 

$$

DeVoir

The office that day

Everything else NWS State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 22, 9:51 AM EST	Special Weather Statement	CTP	Elk, McKean	54 min
Jan 22, 11:42 AM EST	Snow Squall Warning	CTP	Potter	48 min
Jan 22, 11:54 AM EST	Special Weather Statement	CTP	Cameron	66 min
Jan 22, 1:43 PM EST	Snow Squall Warning	CTP	Columbia, Lycoming, Sullivan, Tioga	77 min
Jan 22, 1:48 PM EST	Special Weather Statement	CTP	Clinton	57 min
Jan 22, 4:00 PM EST	Special Weather Statement	CTP	Sullivan	30 min

Nearby

Snow Squall Warnings in Pennsylvania, 2021 Every snow squall warning in 2021

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.