Alert archive / New York / Lake Effect Snow Advisories in 2008

Lake Effect Snow Advisory 14, NWS Buffalo, NY

November 20, 2008Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this lake effect snow advisory at Nov 20, 2008, 3:41 AM EST for Cattaraugus County, Chautauqua County, New York. It took effect at Nov 20, 2008, 12:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued
Nov 20, 2008, 3:41 AM EST (08:41 UTC)
In effect from
Nov 20, 2008, 12:00 PM EST
Expired
Nov 20, 2008, 10:16 AM EST
In force
Issued by
NWS Buffalo, NY

Counties Cattaraugus County, NY, Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 79 km from the middle of the area, began a volume at 08:42 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, 8.7 hours before the alert went out and 225 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 2008-11-20Temperature 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 2008-11-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 220 square meters per square second.1939587897117136Sfc1 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
1103 m above ground
0-6 km bulk shear
85 kt
0-1 km storm-relative helicity
220 m²/s²
0-3 km storm-relative helicity
310 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 20, 10:16 AM ESTLake Effect Snow WarningBUFCattaraugus, Cayuga, Chautauqua, Oswego, Wayne59 hr

Nearby

Lake Effect Snow Advisories in New York, 2008Every lake effect snow advisory in 2008

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.