Alert archive / Pennsylvania / Lake Effect Snow Advisories in 2012

Lake Effect Snow Advisory 1, NWS State College, PA

January 17, 2012Warren County, Pennsylvania

NWS State College, PA issued this lake effect snow advisory at Jan 17, 2012, 2:17 PM EST for Warren County, Pennsylvania. It took effect at Jan 18, 2012, 1:00 AM EST. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued
Jan 17, 2012, 2:17 PM EST (19:17 UTC)
In effect from
Jan 18, 2012, 1:00 AM EST
Expired
Jan 18, 2012, 2:44 PM EST
In force
14 hr
Issued by
NWS State College, PA

County Warren County, PA

The radar

The Buffalo radar (KBUF), 134 km from the middle of the area, began a volume at 19:16 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, 7.3 hours before the alert went out and 133 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, Buffalo Intl Airport, NY at 12:00Z on 2012-01-17Temperature 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, Buffalo Intl Airport, NY at 12:00Z on 2012-01-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 218 square meters per square second.1939587897117Sfc1 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
479 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
218 m²/s²
0-3 km storm-relative helicity
321 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
Jan 17, 4:10 AM ESTWind AdvisoryCTPCambria, Cameron, Clearfield, Elk, McKean, Potter and 2 more24 hr
Jan 17, 5:35 PM ESTSpecial Weather StatementCTPWarren85 min
Jan 17, 6:07 PM ESTSevere Thunderstorm WarningCTPWarren53 min
Jan 17, 6:43 PM ESTSevere Thunderstorm WarningCTPCameron, Elk, McKean, Potter, Warren92 min

Nearby

Lake Effect Snow Advisories in Pennsylvania, 2012Every lake effect snow advisory in 2012

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.