Alert archive / Pennsylvania / Winter Storm Watches in 2015

Winter Storm Watch 2, NWS State College, PA

January 30, 201533 counties in Pennsylvania

NWS State College, PA issued this winter storm watch at Jan 30, 2015, 3:42 PM EST for 33 counties in Pennsylvania. It took effect at Feb 1, 2015, 12:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Jan 30, 2015, 3:42 PM EST (20:42 UTC)
In effect from: Feb 1, 2015, 12:00 PM EST
Expired: Jan 31, 2015, 2:57 PM EST
In force
Issued by: NWS State College, PA

All 33 counties

Adams County, PA, Bedford County, PA, Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Elk County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Lycoming County, PA, McKean County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Potter County, PA, Schuylkill County, PA, Snyder County, PA, Somerset County, PA, Sullivan County, PA, Tioga County, PA, Union County, PA, Warren County, PA, York County, PA

The radar

The State College radar (KCCX), 43 km from the middle of the area, began a volume at 20:40 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.7 hours before the alert went out and 188 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: 962 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -187 m²/s²
0-3 km storm-relative helicity: -40 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 watch 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 watch went out at Jan 30, 2:06 PM EST, 1 hour 36 minutes earlier.

Area forecast discussion, Jan 30, 2:06 PM EST, 1 hour 36 minutes before

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Hazardous weather outlook, Jan 30, 3:42 PM EST, 0 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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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 30, 3:15 AM EST	Wind Advisory	CTP	Adams, Lancaster, York	12 hr
Jan 30, 3:19 AM EST	Wind Chill Advisory	CTP	Cambria, Cameron, Centre, Clearfield, Clinton, Columbia and 12 more	29 hr

Nearby

Winter Storm Watches in Pennsylvania, 2015 Every winter storm watch in 2015

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.