Alert archive / Pennsylvania / Winter Storm Watches in 2018

Winter Storm Watch 2, NWS State College, PA

February 5, 201820 counties in Pennsylvania

NWS State College, PA issued this winter storm watch at Feb 5, 2018, 2:40 PM EST for 20 counties in Pennsylvania. It took effect at Feb 7, 2018, 3:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 5, 2018, 2:40 PM EST (19:40 UTC)
In effect from: Feb 7, 2018, 3:00 AM EST
Expired: Feb 6, 2018, 2:41 PM EST
In force
Issued by: NWS State College, PA

Counties Bedford County, PA, Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Elk County, PA, Lycoming County, PA, McKean County, PA, Montour County, PA, Northumberland County, PA, Potter County, PA, Schuylkill County, PA, Somerset County, PA, Sullivan County, PA, Tioga County, PA, Union County, PA, Warren County, PA

The radar

The State College radar (KCCX), 27 km from the middle of the area, began a volume at 19:43 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.7 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: 2 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 97 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 Feb 5, 1:02 PM EST, 1 hour 38 minutes earlier.

Area forecast discussion, Feb 5, 1:02 PM EST, 1 hour 38 minutes before

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Hazardous weather outlook, Feb 5, 9:22 AM EST, 5 hours 18 minutes before

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In the hours before

Local storm report, Feb 5, 8:49 AM EST, 5 hours 51 minutes before

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Local storm report, Feb 5, 9:31 AM EST, 5 hours 9 minutes before

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Local storm report, Feb 5, 10:59 AM EST, 3 hours 41 minutes before

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Nearby

Winter Storm Watches in Pennsylvania, 2018 Every winter storm watch in 2018

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.