Alert archive / Pennsylvania / Winter Storm Warnings in 2010

Winter Storm Warning 7, NWS State College, PA

December 5, 2010Cambria County, Somerset County, Pennsylvania

NWS State College, PA issued this winter storm warning at Dec 5, 2010, 4:05 AM EST for Cambria County, Somerset County, Pennsylvania. It took effect at Dec 5, 2010, 7:00 AM EST. It was in force for 60 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 5, 2010, 4:05 AM EST (09:05 UTC)
In effect from
Dec 5, 2010, 7:00 AM EST
Expired
Dec 7, 2010, 7:00 PM EST
In force
60 hr
Issued by
NWS State College, PA

Counties Cambria County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 106 km from the middle of the area, began a volume at 09:04 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 00:00Z, 9.1 hours before the alert went out and 106 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-pSkew-T log-p diagram, Pittsburgh, PA at 00:00Z on 2010-12-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2010-12-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
826 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 5, 4:05 AM ESTLake Effect Snow WarningCTPMcKean, Warren4 days
Dec 5, 2:16 PM ESTWinter Weather AdvisoryCTPCameron, Clearfield, Clinton, Elk, Potter, Union53 hr
Dec 5, 3:49 PM ESTSpecial Weather StatementCTPBedford, Blair, Cameron, Centre, Clinton, Franklin and 4 more116 min
Dec 5, 4:32 PM ESTSpecial Weather StatementCTPMcKean, Warren58 min

Nearby

Winter Storm Warnings in Pennsylvania, 2010Every 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.