Alert archive / Pennsylvania / Winter Weather Advisories in 2021

Winter Weather Advisory 3, NWS State College, PA

January 16, 2021Cambria County, Somerset County, Pennsylvania

NWS State College, PA issued this winter weather advisory at Jan 16, 2021, 1:53 PM EST for Cambria County, Somerset County, Pennsylvania. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued: Jan 16, 2021, 1:53 PM EST (18:53 UTC)
Expired: Jan 17, 2021, 7:00 AM EST
In force: 17 hr
Issued by: NWS State College, PA

Counties Cambria County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 106 km from the middle of the area, began a volume at 18:57 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 12:00Z, 6.9 hours before the alert went out and 106 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: 678 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this winter weather advisory went out at Jan 16, 1:12 PM EST, 41 minutes earlier.

Area forecast discussion, Jan 16, 1:12 PM EST, 41 minutes before

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Hazardous weather outlook, Jan 16, 11:56 AM EST, 1 hour 57 minutes before

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In the hours before

Special weather statement, Jan 16, 12:31 PM EST, 1 hour 22 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 16, 12:31 PM EST	Special Weather Statement	CTP	Cambria, Somerset	119 min
Jan 16, 2:26 PM EST	Special Weather Statement	CTP	Bedford, Cambria	64 min
Jan 16, 6:18 PM EST	Special Weather Statement	CTP	Blair	27 min

Nearby

Winter Weather Advisories in Pennsylvania, 2021 Every winter weather advisory 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.