Alert archive / New York / Winter Weather Advisories in 2021

Winter Weather Advisory 11, NWS New York, NY

December 24, 20214 counties in New York; Bergen County, Passaic County, New Jersey; 4 counties in Connecticut

NWS New York, NY issued this winter weather advisory at Dec 24, 2021, 3:37 AM EST for 4 counties in New York; Bergen County, Passaic County, New Jersey; 4 counties in Connecticut. It took effect at Dec 24, 2021, 10:00 PM EST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Dec 24, 2021, 3:37 AM EST (08:37 UTC)
In effect from: Dec 24, 2021, 10:00 PM EST
Expired: Dec 25, 2021, 1:00 PM EST
In force: 15 hr
Issued by: NWS New York, NY

Counties Greater Bridgeport Planning Region, CT, Lower Connecticut River Valley Planning Region, CT, Naugatuck Valley Planning Region, CT, Southeastern Connecticut Planning Region, CT, Bergen County, NJ, Passaic County, NJ, Orange County, NY, Putnam County, NY, Rockland County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 72 km from the middle of the area, began a volume at 08:40 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

Brookhaven, NY (KOKX), launched 00:00Z, 8.6 hours before the alert went out and 72 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: 1557 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 45 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 New York, NY wrote its last area forecast discussion before this winter weather advisory went out at Dec 24, 12:29 AM EST, 3 hours 8 minutes earlier.

Area forecast discussion, Dec 24, 12:29 AM EST, 3 hours 8 minutes before

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Hazardous weather outlook, Dec 23, 3:44 PM EST, 11 hours 53 minutes before

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In the hours before

Special weather statement, Dec 24, 3:26 AM EST, 11 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 24, 3:25 PM EST	Small Craft Advisory	OKX		60 hr

Nearby

Winter Weather Advisories in New York, 2021 Winter Weather Advisories in Connecticut, 2021 Winter Weather Advisories in New Jersey, 2021 Every winter weather advisory in 2021

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.