Alert archive / Pennsylvania / Lake Effect Snow Warnings in 2016

Lake Effect Snow Warning 2, NWS Pittsburgh, PA

December 30, 2016Mercer County, Venango County, Pennsylvania

NWS Pittsburgh, PA issued this lake effect snow warning at Dec 30, 2016, 9:33 AM EST for Mercer County, Venango County, Pennsylvania. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 30, 2016, 9:33 AM EST (14:33 UTC)
Expired: Dec 30, 2016, 7:00 PM EST
In force: 9 hr
Issued by: NWS Pittsburgh, PA

Counties Mercer County, PA, Venango County, PA

The radar

The Pittsburgh radar (KPBZ), 93 km from the middle of the area, began a volume at 14:35 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 (KAGC), launched 12:00Z, 2.6 hours before the alert went out and 105 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: 803 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 98 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 lake effect snow 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 lake effect snow warning went out at Dec 29, 6:37 PM EST, 14 hours 56 minutes earlier.

Area forecast discussion, Dec 29, 6:37 PM EST, 14 hours 56 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
Dec 29, 8:47 PM EST	Special Weather Statement	PBZ	Armstrong, Butler, Clarion, Jefferson, Lawrence, Mercer	118 min
Dec 29, 10:25 PM EST	Special Weather Statement	PBZ	Armstrong, Butler, Clarion, Jefferson, Lawrence	2 hr
Dec 30, 3:07 AM EST	Special Weather Statement	PBZ	Washington	53 min
Dec 30, 4:24 AM EST	Special Weather Statement	PBZ	Allegheny	21 min
Dec 30, 5:40 AM EST	Special Weather Statement	PBZ	Fayette, Washington, Westmoreland	20 min
Dec 30, 7:17 AM EST	Special Weather Statement	PBZ	Fayette, Greene	73 min
Dec 30, 10:10 AM EST	Special Weather Statement	PBZ	Fayette, Washington	65 min
Dec 30, 11:14 AM EST	Special Weather Statement	PBZ	Fayette, Greene	61 min
Dec 30, 11:33 AM EST	Special Weather Statement	PBZ	Clarion, Jefferson, Mercer	87 min
Dec 30, 12:24 PM EST	Special Weather Statement	PBZ	Greene	66 min
Dec 30, 1:08 PM EST	Special Weather Statement	PBZ	Clarion	82 min
Dec 30, 2:29 PM EST	Special Weather Statement	PBZ	Clarion, Jefferson	91 min
Dec 30, 1:10 PM EST	Special Weather Statement	PBZ	Monongalia, Preston	65 min

Nearby

Lake Effect Snow Warnings in Pennsylvania, 2016 Every lake effect snow warning in 2016

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.