Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 23, NWS Green Bay, WI

May 15, 2025Langlade County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 15, 2025, 7:32 PM CDT for Langlade County, Wisconsin. It was in force for 16 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 15, 2025, 7:32 PM CDT (00:32 UTC)
Expired
May 15, 2025, 7:48 PM CDT
In force
16 min
Issued by
NWS Green Bay, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Langlade County, WI

The radar

The Green Bay radar (KGRB), 114 km from the middle of the area, began a volume at 00:33 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 15, 3:05 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.5 hours before the alert went out and 359 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2025-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2025-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -158 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1190 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
-158 m²/s²
0-3 km storm-relative helicity
-98 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 15, 7:31 PM CDT, 1 minute earlier.

Area forecast discussion, May 15, 7:31 PM CDT, 1 minute before
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Hazardous weather outlook, May 15, 7:09 PM CDT, 23 minutes before
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In the hours before

Local storm report, May 15, 6:52 PM CDT, 40 minutes before
Preliminary Local Storm Report
National Weather Service Green Bay WI
652 PM CDT Thu May 15 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0620 PM     Hail             2 E Evergreen           44.84N 89.59W
05/15/2025  M1.25 Inch       Marathon           WI   Public

&&
Local storm report, May 15, 6:55 PM CDT, 37 minutes before
Preliminary Local Storm Report
National Weather Service Green Bay WI
655 PM CDT Thu May 15 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0650 PM     Hail             2 WSW Amherst Junction  44.46N 89.35W
05/15/2025  E1.50 Inch       Portage            WI   Public

&&
Local storm report, May 15, 6:59 PM CDT, 33 minutes before
Preliminary Local Storm Report
National Weather Service Green Bay WI
659 PM CDT Thu May 15 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 PM     Hail             1 N Stratford           44.81N 90.08W
05/15/2025  M0.70 Inch       Marathon           WI   Trained Spotter

            Reported on slack from trained spotter.

&&
Local storm report, May 15, 7:09 PM CDT, 23 minutes before
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Local storm report, May 15, 7:10 PM CDT, 22 minutes before
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Local storm report, May 15, 7:12 PM CDT, 20 minutes before
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The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 15, 7:01 PM CDTSevere Thunderstorm WarningGRBMarathon, Shawano, Waupaca44 min
May 15, 7:04 PM CDTTornado WarningGRBLanglade, Lincoln26 min
May 15, 7:14 PM CDTSpecial Marine WarningGRB99 min
May 15, 11:11 PM CDTSmall Craft AdvisoryGRB49 hr
May 16, 2:01 PM CDTSpecial Weather StatementGRBMenominee29 min
May 16, 2:07 PM CDTSevere Thunderstorm WarningGRBLanglade, Menominee, Oconto, Shawano53 min
May 16, 2:10 PM CDTSevere Thunderstorm WarningGRBKewaunee21 min
May 16, 2:29 PM CDTSpecial Weather StatementGRBKewaunee31 min
May 16, 2:33 PM CDTSpecial Weather StatementGRBMenominee, Oconto, Shawano, Waupaca27 min
May 16, 2:41 PM CDTSevere Thunderstorm WarningGRBForest, Langlade, Marinette, Oconto49 min
May 16, 2:59 PM CDTSpecial Weather StatementGRBMarinette31 min
May 16, 3:07 PM CDTSpecial Weather StatementGRBMenominee, Oconto, Shawano38 min
May 16, 3:19 PM CDTSevere Thunderstorm WarningGRBManitowoc41 min
May 16, 3:49 PM CDTSpecial Weather StatementGRBKewaunee26 min
May 16, 4:30 PM CDTSpecial Weather StatementGRBCalumet45 min
May 16, 4:40 PM CDTSevere Thunderstorm WarningGRBManitowoc39 min
May 16, 4:47 PM CDTSpecial Marine WarningGRB31 min
May 16, 4:54 PM CDTSevere Thunderstorm WarningGRBCalumet, Manitowoc36 min
May 16, 5:02 PM CDTSevere Thunderstorm WarningGRBCalumet, Outagamie, Waupaca, Waushara, Winnebago43 min
May 16, 5:27 PM CDTSevere Thunderstorm Warning Considerable damage threatGRBBrown, Calumet, Manitowoc, Oconto, Outagamie, Shawano and 2 more48 min
May 16, 5:42 PM CDTSpecial Marine WarningGRB48 min
May 16, 6:01 PM CDTSevere Thunderstorm WarningGRBBrown, Door, Kewaunee, Manitowoc, Marinette, Oconto44 min
May 16, 6:32 PM CDTSpecial Marine WarningGRB46 min
May 16, 6:42 PM CDTSpecial Weather StatementGRBDoor33 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2025Every severe thunderstorm warning in 2025

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.