Alert archive / New York / Dense Fog Advisories in 2018

Dense Fog Advisory 3, NWS Buffalo, NY

February 23, 20185 counties in New York

NWS Buffalo, NY issued this dense fog advisory at Feb 23, 2018, 9:34 PM EST for 5 counties in New York. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Feb 23, 2018, 9:34 PM EST (02:34 UTC)
Expired
Feb 24, 2018, 3:35 AM EST
In force
6 hr
Issued by
NWS Buffalo, NY

Counties Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 56 km from the middle of the area, began a volume at 02:31 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, 2.6 hours before the alert went out and 258 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 2018-02-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 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 2018-02-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 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
20 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
680 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
73 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
Feb 24, 3:33 AM ESTWinter Weather AdvisoryBUFJefferson, Lewis30 hr
Feb 24, 2:58 PM ESTHigh Wind WarningBUFChautauqua, Erie, Genesee, Monroe, Niagara, Orleans and 1 more24 hr
Feb 24, 2:58 PM ESTWind AdvisoryBUFAllegany, Cattaraugus, Jefferson, Lewis, Livingston, Ontario and 1 more24 hr
Feb 24, 3:08 PM ESTSmall Craft AdvisoryBUF36 hr

Nearby

Dense Fog Advisories in New York, 2018Every dense fog advisory in 2018

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.