Alert archive / Wisconsin / Freeze Warnings in 2020

Freeze Warning 6, NWS Green Bay, WI

October 15, 20207 counties in Wisconsin

NWS Green Bay, WI issued this freeze warning at Oct 15, 2020, 3:03 AM CDT for 7 counties in Wisconsin. It took effect at Oct 16, 2020, 1:00 AM CDT. It was in force for 7 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: Oct 15, 2020, 3:03 AM CDT (08:03 UTC)
In effect from: Oct 16, 2020, 1:00 AM CDT
Expired: Oct 16, 2020, 8:00 AM CDT
In force: 7 hr
Issued by: NWS Green Bay, WI

Counties Brown County, WI, Calumet County, WI, Door County, WI, Kewaunee County, WI, Manitowoc County, WI, Outagamie County, WI, Winnebago County, WI

The radar

The Green Bay radar (KGRB), 19 km from the middle of the area, began a volume at 08:03 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 00:00Z, 8.1 hours before the alert went out and 17 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: 1434 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 284 m²/s²
0-3 km storm-relative helicity: 257 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 freeze 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 freeze warning went out at Oct 14, 10:52 PM CDT, 4 hours 11 minutes earlier.

Area forecast discussion, Oct 14, 10:52 PM CDT, 4 hours 11 minutes before

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Hazardous weather outlook, Oct 15, 3:02 AM CDT, 1 minute before

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In the hours before

Special weather statement, Oct 14, 9:06 PM CDT, 5 hours 57 minutes before

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Special weather statement, Oct 14, 9:29 PM CDT, 5 hours 34 minutes before

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Local storm report, Oct 14, 9:41 PM CDT, 5 hours 22 minutes before

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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
Oct 14, 7:16 PM CDT	Special Weather Statement	GRB	Portage, Wood	44 min
Oct 14, 8:08 PM CDT	Special Weather Statement	GRB	Shawano, Waupaca, Waushara	52 min
Oct 14, 8:27 PM CDT	Special Weather Statement	GRB	Outagamie, Waupaca, Waushara, Winnebago	48 min
Oct 14, 9:06 PM CDT	Special Weather Statement	GRB	Brown, Outagamie, Winnebago	39 min
Oct 14, 9:29 PM CDT	Special Weather Statement	GRB	Brown	16 min
Oct 15, 4:31 PM CDT	Gale Watch	GRB		22 hr

Nearby

Freeze Warnings in Wisconsin, 2020 Every freeze warning 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.