Alert archive / Pennsylvania / Freezing Rain Advisories in 2016

Freezing Rain Advisory 5, NWS State College, PA

December 18, 2016Elk County, McKean County, Warren County, Pennsylvania

NWS State College, PA issued this freezing rain advisory at Dec 18, 2016, 6:20 AM EST for Elk County, McKean County, Warren County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Dec 18, 2016, 6:20 AM EST (11:20 UTC)
Expired
Dec 18, 2016, 9:00 AM EST
In force
3 hr
Issued by
NWS State College, PA

Counties Elk County, PA, McKean County, PA, Warren County, PA

The radar

The State College radar (KCCX), 109 km from the middle of the area, began a volume at 11:22 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 (KAGC), launched 00:00Z, 11.3 hours before the alert went out and 177 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 2016-12-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLLFCEL10008507005003002001001 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 2016-12-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 636 square meters per square second.1939587897117136156Sfc1 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
2 J/kg
Mixed-layer CIN
-100 J/kg
Mixed-layer LCL
630 m above ground
0-6 km bulk shear
82 kt
0-1 km storm-relative helicity
636 m²/s²
0-3 km storm-relative helicity
672 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 17, 9:31 PM ESTDense Fog AdvisoryCTPAdams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 3 more9 hr
Dec 17, 11:34 PM ESTSpecial Weather StatementCTPAdams, Bedford, Blair, Cameron, Centre, Clinton and 21 more56 min
Dec 18, 9:07 AM ESTWinter Weather AdvisoryCTPCambria, Cameron, Clearfield, Elk, McKean, Potter and 2 more3 hr
Dec 18, 9:24 AM ESTAreal Flood AdvisoryCTPCambria, Clearfield, Somerset6 hr

Nearby

Freezing Rain Advisories in Pennsylvania, 2016Every freezing rain advisory in 2016

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.