Alert archive / Pennsylvania / Lake Effect Snow Advisories in 2017

Lake Effect Snow Advisory 4, NWS State College, PA

February 9, 2017Warren County, Pennsylvania

NWS State College, PA issued this lake effect snow advisory at Feb 9, 2017, 1:46 PM EST for Warren County, Pennsylvania. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Feb 9, 2017, 1:46 PM EST (18:46 UTC)
Expired
Feb 9, 2017, 9:57 PM EST
In force
8 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 18:45 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, 6.8 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 2017-02-09Temperature 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 2017-02-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -175 square meters per square second.1939587897Sfc1 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
869 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
-175 m²/s²
0-3 km storm-relative helicity
-114 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
Feb 9, 3:20 PM ESTSpecial Weather StatementCTPBlair, Cambria, Cameron, Centre, Clearfield, Elk and 6 more115 min
Feb 9, 4:27 PM ESTSpecial Weather StatementCTPDauphin63 min
Feb 9, 5:05 PM ESTSpecial Weather StatementCTPClearfield, Cumberland, Juniata, Mifflin, Perry25 min
Feb 9, 5:40 PM ESTSpecial Weather StatementCTPClearfield, Cumberland, Juniata, Mifflin, Perry35 min
Feb 9, 6:15 PM ESTSpecial Weather StatementCTPMifflin30 min

Nearby

Lake Effect Snow Advisories in Pennsylvania, 2017Every lake effect snow advisory in 2017

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.