Alert archive / Wisconsin / Winter Weather Advisories in 2021

Winter Weather Advisory 14, NWS Green Bay, WI

December 4, 202115 counties in Wisconsin

NWS Green Bay, WI issued this winter weather advisory at Dec 4, 2021, 3:22 PM CST for 15 counties in Wisconsin. It took effect at Dec 5, 2021, 3:00 AM CST. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Dec 4, 2021, 3:22 PM CST (21:22 UTC)
In effect from: Dec 5, 2021, 3:00 AM CST
Expired: Dec 5, 2021, 9:00 PM CST
In force: 18 hr
Issued by: NWS Green Bay, WI

Counties Brown County, WI, Door County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Waupaca County, WI, Waushara County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 59 km from the middle of the area, began a volume at 21:27 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.4 hours before the alert went out and 60 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: 1317 m above ground
0-6 km bulk shear: 104 kt
0-1 km storm-relative helicity: -93 m²/s²
0-3 km storm-relative helicity: 47 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 Green Bay, WI wrote its last area forecast discussion before this winter weather advisory went out at Dec 4, 11:03 AM CST, 4 hours 19 minutes earlier.

Area forecast discussion, Dec 4, 11:03 AM CST, 4 hours 19 minutes before

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Hazardous weather outlook, Dec 4, 4:17 AM CST, 11 hours 5 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 Green Bay, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 4, 3:19 AM CST	Winter Storm Watch	GRB	Vilas	12 hr
Dec 4, 4:25 AM CST	Gale Watch	GRB		24 hr
Dec 4, 3:22 PM CST	Winter Storm Warning	GRB	Door, Florence, Forest, Langlade, Lincoln, Marinette and 3 more	44 hr
Dec 4, 3:23 PM CST	Small Craft Advisory	GRB		33 hr

Nearby

Winter Weather Advisories in Wisconsin, 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.