Alert archive / Pennsylvania / Winter Storm Warnings in 2010

Winter Storm Warning 3, NWS State College, PA

February 4, 201022 counties in Pennsylvania

NWS State College, PA issued this winter storm warning at Feb 4, 2010, 3:09 PM EST for 22 counties in Pennsylvania. It took effect at Feb 5, 2010, 2:00 PM EST. It was in force for 23 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: Feb 4, 2010, 3:09 PM EST (20:09 UTC)
In effect from: Feb 5, 2010, 2:00 PM EST
Expired: Feb 6, 2010, 12:55 PM EST
In force: 23 hr
Issued by: NWS State College, PA

All 22 counties

Adams County, PA, Bedford County, PA, Blair County, PA, Cambria County, PA, Centre County, PA, Clearfield County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Mifflin County, PA, Northumberland County, PA, Perry County, PA, Schuylkill County, PA, Snyder County, PA, Somerset County, PA, Union County, PA, York County, PA

The radar

The State College radar (KCCX), 73 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 221 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: 663 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 31 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 storm warning 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 storm warning went out at Feb 4, 1:10 PM EST, 1 hour 59 minutes earlier.

Area forecast discussion, Feb 4, 1:10 PM EST, 1 hour 59 minutes before

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Hazardous weather outlook, Feb 4, 5:30 AM EST, 9 hours 39 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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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
Feb 4, 3:20 AM EST	Winter Storm Watch	CTP	Adams, Bedford, Blair, Cambria, Cumberland, Dauphin and 10 more	12 hr
Feb 4, 3:09 PM EST	Winter Storm Watch	CTP	Centre, Clearfield, Clinton, Columbia, Lycoming, Montour and 4 more	13 hr

Nearby

Winter Storm Warnings in Pennsylvania, 2010 Every winter storm warning in 2010

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.