Alert archive / Wisconsin / Winter Storm Warnings in 2026

Winter Storm Warning 6, NWS Green Bay, WI

April 1, 20266 counties in Wisconsin

NWS Green Bay, WI issued this winter storm warning at Apr 1, 2026, 3:16 AM CDT for 6 counties in Wisconsin. It took effect at Apr 2, 2026, 3:00 AM CDT. It was in force for 16 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 1, 2026, 3:16 AM CDT (08:16 UTC)
In effect from: Apr 2, 2026, 3:00 AM CDT
Expired: Apr 2, 2026, 7:08 PM CDT
In force: 16 hr
Issued by: NWS Green Bay, WI

Counties Florence County, WI, Forest County, WI, Marinette County, WI, Oconto County, WI, Oneida County, WI, Vilas County, WI

The radar

The Green Bay radar (KGRB), 132 km from the middle of the area, began a volume at 08:17 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

Minneapolis, MN (KMPX), launched 00:00Z, 8.3 hours before the alert went out and 390 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: 1684 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: -95 m²/s²
0-3 km storm-relative helicity: -8 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 storm warning 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 storm warning went out at Mar 31, 10:34 PM CDT, 4 hours 42 minutes earlier.

Area forecast discussion, Mar 31, 10:34 PM CDT, 4 hours 42 minutes before

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Hazardous weather outlook, Mar 31, 3:31 PM CDT, 11 hours 45 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
Apr 1, 3:16 AM CDT	Ice Storm Warning	GRB	Forest, Langlade, Lincoln, Marathon, Menominee, Oneida and 6 more	40 hr
Apr 1, 3:16 AM CDT	Winter Weather Advisory	GRB	Brown, Calumet, Door, Kewaunee, Manitowoc, Outagamie and 2 more	31 hr

Nearby

Winter Storm Warnings in Wisconsin, 2026 Every winter storm warning in 2026

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.