Alert archive / Pennsylvania / Snow Squall Warnings in 2020

Snow Squall Warning 2, NWS Pittsburgh, PA

January 8, 20204 counties in Pennsylvania

NWS Pittsburgh, PA issued this snow squall warning at Jan 8, 2020, 8:29 AM EST for 4 counties in Pennsylvania. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 8, 2020, 8:29 AM EST (13:29 UTC)
Expired: Jan 8, 2020, 9:30 AM EST
In force: 61 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

Counties Butler County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA

The radar

The Pittsburgh radar (KPBZ), 70 km from the middle of the area, began a volume at 13:31 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, 1.5 hours before the alert went out and 83 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: 1232 m above ground
0-6 km bulk shear: 92 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 264 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 snow squall warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pittsburgh, PA wrote its last area forecast discussion before this snow squall warning went out at Jan 8, 7:22 AM EST, 1 hour 7 minutes earlier.

Area forecast discussion, Jan 8, 7:22 AM EST, 1 hour 7 minutes before

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Hazardous weather outlook, Jan 8, 6:40 AM EST, 1 hour 49 minutes before

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In the hours before

Special weather statement, Jan 8, 4:30 AM EST, 3 hours 59 minutes before

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Special weather statement, Jan 8, 6:02 AM EST, 2 hours 27 minutes before

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Special weather statement, Jan 8, 6:21 AM EST, 2 hours 8 minutes before

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Special weather statement, Jan 8, 6:32 AM EST, 1 hour 57 minutes before

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Special weather statement, Jan 8, 7:18 AM EST, 1 hour 11 minutes before

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Special weather statement, Jan 8, 8:16 AM EST, 13 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 8, 3:11 AM EST	Special Weather Statement	PBZ	Clarion, Forest, Jefferson, Venango	79 min
Jan 8, 4:30 AM EST	Special Weather Statement	PBZ	Clarion, Forest, Jefferson, Venango	75 min
Jan 8, 5:36 AM EST	Snow Squall Warning	PBZ	Clarion, Venango	24 min
Jan 8, 6:02 AM EST	Special Weather Statement	PBZ	Clarion	28 min
Jan 8, 6:21 AM EST	Special Weather Statement	PBZ	Jefferson	24 min
Jan 8, 6:32 AM EST	Special Weather Statement	PBZ	Clarion, Jefferson	28 min
Jan 8, 7:18 AM EST	Special Weather Statement	PBZ	Clarion, Forest, Jefferson, Mercer, Venango	57 min
Jan 8, 8:16 AM EST	Special Weather Statement	PBZ	Butler, Clarion, Forest, Jefferson, Lawrence, Mercer and 1 more	59 min
Jan 8, 9:21 AM EST	Snow Squall Warning	PBZ	Armstrong, Beaver, Butler, Clarion, Indiana, Jefferson and 2 more	39 min
Jan 8, 10:01 AM EST	Special Weather Statement	PBZ	Armstrong, Butler, Indiana	44 min
Jan 8, 10:08 AM EST	Special Weather Statement	PBZ	Beaver	52 min
Jan 8, 10:45 AM EST	Snow Squall Warning	PBZ	Allegheny, Armstrong, Beaver, Butler, Indiana, Westmoreland	45 min
Jan 8, 3:47 AM EST	Wind Advisory	PBZ	Tucker	11 hr

Nearby

Snow Squall Warnings in Pennsylvania, 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.