Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS State College, PA

January 20, 2021Clearfield County, Pennsylvania

NWS State College, PA issued this special weather statement at Jan 20, 2021, 4:49 AM EST for Clearfield County, Pennsylvania. It was in force for 56 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 20, 2021, 4:49 AM EST (09:49 UTC)
Expired: Jan 20, 2021, 5:45 AM EST
In force: 56 min
Issued by: NWS State College, PA

County Clearfield County, PA

The radar

The State College radar (KCCX), 37 km from the middle of the area, began a volume at 09:48 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

Pittsburgh, PA (KPIT), launched 00:00Z, 9.8 hours before the alert went out and 164 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: 1349 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

050 
WWUS81 KCTP 200949
SPSCTP

Special Weather Statement
National Weather Service State College PA
449 AM EST Wed Jan 20 2021
 
PAZ017-018-201045-
Northern Centre PA-Clearfield PA-
449 AM EST Wed Jan 20 2021

...A BAND OF HEAVY SNOW WILL AFFECT PARTS OF NORTHERN CENTRE AND
CLEARFIELD COUNTIES...

HAZARDS...A band of heavy snow accompanied by winds of 25 MPH which 
can rapidly reduce visibility to less than a half of a mile.

LOCATION AND MOVEMENT...At 446 AM EST, a band of heavy snow was near 
Sandy moving southeast at 40 MPH. Other bands were forming nearby 
this band.

THIS BAND OF HEAVY SNOW WILL BE NEAR...
  DuBois and Sandy around 450 AM EST.
  Rockton around 500 AM EST.
  S.B. Elliot State Park around 510 AM EST.
  Curwensville around 515 AM EST.
  Clearfield, Plymptonville and Hyde around 520 AM EST.
  Woodland around 525 AM EST.

For those driving on Interstate 80, this includes areas between the
Dubois and Milesburg exits, specifically from mile markers 97 to 147.

SAFETY INFO...
Use extra caution if you must travel into or through this band of
heavy snow. Rapid changes in visibility and potentially slick roads
are likely to lead to accidents. Consider delaying travel until this
band of heavy snow passes your location.

Conditions can deteriorate rapidly in winter weather situations. Be
prepared for snow or ice covered roads. Slow down and allow extra
time to reach your destination.

&&

LAT...LON 4114 7880 4120 7876 4120 7870 4122 7865
      4116 7804 4114 7801 4115 7800 4114 7786
      4089 7799 4081 7811 4091 7881
TIME...MOT...LOC 0946Z 287DEG 36KT 4114 7884 
$$

Martin

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 20, 5:29 AM EST	Special Weather Statement	CTP	Bedford, Somerset	61 min
Jan 20, 5:40 AM EST	Special Weather Statement	CTP	Centre, Mifflin	50 min
Jan 20, 6:27 AM EST	Special Weather Statement	CTP	Bedford, Franklin, Fulton	48 min
Jan 20, 6:54 AM EST	Special Weather Statement	CTP	Sullivan	51 min
Jan 20, 8:17 AM EST	Special Weather Statement	CTP	Centre	43 min
Jan 20, 9:37 AM EST	Special Weather Statement	CTP	Juniata	38 min
Jan 20, 9:38 AM EST	Special Weather Statement	CTP	Centre	37 min
Jan 20, 9:39 AM EST	Special Weather Statement	CTP	Centre	36 min
Jan 20, 10:18 AM EST	Special Weather Statement	CTP	Mifflin	57 min

Nearby

Special Weather Statements in Pennsylvania, 2021 Every special weather statement 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.