Alert archive / New York / Winter Weather Advisories in 2020

Winter Weather Advisory 27, NWS Buffalo, NY

December 24, 202010 counties in New York

NWS Buffalo, NY issued this winter weather advisory at Dec 24, 2020, 3:52 AM EST for 10 counties in New York. It took effect at Dec 24, 2020, 7:00 PM EST. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued: Dec 24, 2020, 3:52 AM EST (08:52 UTC)
In effect from: Dec 24, 2020, 7:00 PM EST
Expired: Dec 25, 2020, 9:27 AM EST
In force: 14 hr
Issued by: NWS Buffalo, NY

Counties Allegany County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Monroe County, NY, Niagara County, NY, Ontario County, NY, Orleans County, NY, Wayne County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 62 km from the middle of the area, began a volume at 08:55 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

Albany, NY (KALY), launched 00:00Z, 8.9 hours before the alert went out and 339 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1716 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 271 m²/s²
0-3 km storm-relative helicity: 384 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Buffalo, NY wrote its last area forecast discussion before this winter weather advisory went out at Dec 24, 12:32 AM EST, 3 hours 20 minutes earlier.

Area forecast discussion, Dec 24, 12:32 AM EST, 3 hours 20 minutes before

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Hazardous weather outlook, Dec 23, 8:02 PM EST, 7 hours 50 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 23, 8:00 PM EST	Flood Watch	BUF	Allegany, Jefferson, Lewis, Livingston	46 hr
Dec 24, 1:14 PM EST	Small Craft Advisory	BUF		67 hr

Nearby

Winter Weather Advisories in New York, 2020 Every winter weather advisory in 2020

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.