Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 28, NWS Green Bay, WI

May 16, 2025Manitowoc County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 16, 2025, 4:40 PM CDT for Manitowoc County, Wisconsin. It was in force for 39 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 16, 2025, 4:40 PM CDT (21:40 UTC)
Expired: May 16, 2025, 5:19 PM CDT
In force: 39 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Manitowoc County, WI

The radar

The Green Bay radar (KGRB), 56 km from the middle of the area, began a volume at 21:41 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, 9.7 hours before the alert went out and 54 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: 1761 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 303 m²/s²
0-3 km storm-relative helicity: 325 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 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 16, 3:55 PM CDT, 45 minutes earlier.

Area forecast discussion, May 16, 3:55 PM CDT, 45 minutes before

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Hazardous weather outlook, May 16, 3:00 PM CDT, 1 hour 40 minutes before

Hazardous Weather Outlook
National Weather Service Green Bay WI
300 PM CDT Fri May 16 2025

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-172000-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
300 PM CDT Fri May 16 2025

This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.

.DAY ONE...Tonight

Gusty southwest winds of 40 to locally 45 mph are expected across
central and east-central Wisconsin through early this evening.
Elsewhere, expect gusts of 35 to 40 mph.

Scattered afternoon thunderstorms will be capable of producing
damaging wind gusts and hail up to 1 inch in diameter. Isolated
severe storms are possible through early this evening.

.DAYS TWO THROUGH SEVEN...Saturday through Friday

Thunderstorms may return Tuesday into Wednesday next week.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to report any wind gusts greater than 40
mph, wind damage, or hail to the National Weather Service in Green
Bay.

LMZ521-522-541>543-172000-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
300 PM CDT Fri May 16 2025

This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.

.DAY ONE...Tonight

Conditions will be hazardous to small craft due to strong and
gusty winds and high waves.

.DAYS TWO THROUGH SEVEN...Saturday through Friday

Conditions will be hazardous to small craft through Saturday
evening due to strong winds and high waves.

KLJ

In the hours before

Special weather statement, May 16, 2:33 PM CDT, 2 hours 7 minutes before

Special Weather Statement
National Weather Service GREEN BAY WI
Issued by National Weather Service Milwaukee/Sullivan WI
233 PM CDT Fri May 16 2025

WIZ019>021-030-031-036>038-074-162000-
Southern Oconto County WI-Waupaca WI-Shawano WI-Langlade WI-
Outagamie WI-Northern Oconto County WI-Marathon WI-Portage WI-
Menominee WI-
233 PM CDT Fri May 16 2025

...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN PORTAGE...
SOUTHEASTERN MARATHON...MENOMINEE...WAUPACA...WEST CENTRAL OCONTO...
NORTHWESTERN OUTAGAMIE...SOUTH CENTRAL LANGLADE AND SHAWANO COUNTIES
THROUGH 300 PM CDT...

At 232 PM CDT, trained weather spotters reported a cluster of strong
thunderstorms along a line extending from near Bevent to near
Clintonville. Movement was northeast at 55 mph.

HAZARD...Wind gusts of 50 to 55 mph and pea size hail.

SOURCE...Trained weather spotters.  There have been multiple reports
         of wind gusts around 50 MPH.  Blowing dust is also causing
         reduced visibilities in some areas.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Stevens Point, Shawano, Clintonville, Gillett, Bevent, Wittenberg,
Amherst, Embarrass, Big Smokey Falls, South Branch, Legend Lake,
Keshena, Neopit, Stockton, Belle Plaine, Bonduel, Royalton, Red
River, Manawa, and Iola.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4508 8914 4503 8816 4434 8891 4455 8969
TIME...MOT...LOC 1932Z 218DEG 46KT 4478 8934 4467 8883

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

BOXELL

Special weather statement, May 16, 2:59 PM CDT, 1 hour 41 minutes before

Special Weather Statement
National Weather Service GREEN BAY WI
Issued by National Weather Service Milwaukee/Sullivan WI
259 PM CDT Fri May 16 2025

WIZ013-073-074-162030-
Southern Oconto County WI-Southern Marinette County WI-
Northern Marinette County WI-
259 PM CDT Fri May 16 2025

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN MARINETTE AND EAST
CENTRAL OCONTO COUNTIES THROUGH 330 PM CDT...

At 258 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles southeast of Pound, or 11 miles west of Marinette, moving
northeast at 50 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Marinette, Oconto, Peshtigo, Porterfield, Stiles, Harmony, Cullen,
County Line, Mcallister, Loomis, and Lake Noquebay.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4508 8760 4505 8762 4499 8763 4495 8781
      4493 8784 4488 8783 4483 8789 4484 8806
      4541 8789 4541 8785 4536 8789 4537 8787
      4534 8785 4535 8776 4539 8769 4534 8765
      4520 8775 4511 8766
TIME...MOT...LOC 1958Z 208DEG 41KT 4504 8786

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

BOXELL

Special weather statement, May 16, 3:07 PM CDT, 1 hour 33 minutes before

Special Weather Statement
National Weather Service GREEN BAY WI
Issued by National Weather Service Milwaukee/Sullivan WI
307 PM CDT Fri May 16 2025

WIZ019>021-031-039-073-074-162045-
Southern Oconto County WI-Shawano WI-Southern Marinette County WI-
Langlade WI-Northern Oconto County WI-Brown WI-Menominee WI-
307 PM CDT Fri May 16 2025

...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN BROWN...SOUTHWESTERN
MARINETTE...MENOMINEE...OCONTO...SOUTHEASTERN LANGLADE AND CENTRAL
SHAWANO COUNTIES THROUGH 345 PM CDT...

At 307 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms along a line extending from near White Lake to near
Gillett. Movement was northeast at 50 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Shawano, Pulaski, Gillett, Crivitz, Mountain, Pound, White Lake, Big
Smokey Falls, Bear Paw Scout Camp, Gardner Dam Scout Camp, South
Branch, Legend Lake, Keshena, Neopit, Langlade, Chase, Oconto Falls,
Pittsfield, Angelica, and Stiles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4497 8921 4538 8876 4535 8806 4534 8806
      4534 8792 4533 8791 4484 8805 4458 8825
TIME...MOT...LOC 2007Z 217DEG 45KT 4519 8887 4487 8838

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

BOXELL

Special weather statement, May 16, 3:49 PM CDT, 51 minutes before

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Local storm report, May 16, 4:04 PM CDT, 36 minutes before

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Special weather statement, May 16, 4:30 PM CDT, 10 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
May 15, 7:01 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Shawano, Waupaca	44 min
May 15, 7:04 PM CDT	Tornado Warning	GRB	Langlade, Lincoln	26 min
May 15, 7:14 PM CDT	Special Marine Warning	GRB		99 min
May 15, 7:32 PM CDT	Severe Thunderstorm Warning	GRB	Langlade	16 min
May 15, 11:11 PM CDT	Small Craft Advisory	GRB		49 hr
May 16, 2:01 PM CDT	Special Weather Statement	GRB	Menominee	29 min
May 16, 2:07 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Menominee, Oconto, Shawano	53 min
May 16, 2:10 PM CDT	Severe Thunderstorm Warning	GRB	Kewaunee	21 min
May 16, 2:29 PM CDT	Special Weather Statement	GRB	Kewaunee	31 min
May 16, 2:33 PM CDT	Special Weather Statement	GRB	Menominee, Oconto, Shawano, Waupaca	27 min
May 16, 2:41 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Langlade, Marinette, Oconto	49 min
May 16, 2:59 PM CDT	Special Weather Statement	GRB	Marinette	31 min
May 16, 3:07 PM CDT	Special Weather Statement	GRB	Menominee, Oconto, Shawano	38 min
May 16, 3:19 PM CDT	Severe Thunderstorm Warning	GRB	Manitowoc	41 min
May 16, 3:49 PM CDT	Special Weather Statement	GRB	Kewaunee	26 min
May 16, 4:30 PM CDT	Special Weather Statement	GRB	Calumet	45 min
May 16, 4:47 PM CDT	Special Marine Warning	GRB		31 min
May 16, 4:54 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Manitowoc	36 min
May 16, 5:02 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Outagamie, Waupaca, Waushara, Winnebago	43 min
May 16, 5:27 PM CDT	Severe Thunderstorm Warning Considerable damage threat	GRB	Brown, Calumet, Manitowoc, Oconto, Outagamie, Shawano and 2 more	48 min
May 16, 5:42 PM CDT	Special Marine Warning	GRB		48 min
May 16, 6:01 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Door, Kewaunee, Manitowoc, Marinette, Oconto	44 min
May 16, 6:32 PM CDT	Special Marine Warning	GRB		46 min
May 16, 6:42 PM CDT	Special Weather Statement	GRB	Door	33 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2025 Every 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.