Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 33, NWS Green Bay, WI

May 30, 2025Brown County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 30, 2025, 4:43 PM CDT for Brown County, Wisconsin. It was in force for 47 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 30, 2025, 4:43 PM CDT (21:43 UTC)
Expired: May 30, 2025, 5:30 PM CDT
In force: 47 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Brown County, WI

The radar

The Green Bay radar (KGRB), 10 km from the middle of the area, began a volume at 21:46 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.

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 30, 4:04 PM CDT, 39 minutes earlier.

Area forecast discussion, May 30, 4:04 PM CDT, 39 minutes before

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Hazardous weather outlook, May 30, 2:58 PM CDT, 1 hour 45 minutes before

Hazardous Weather Outlook
National Weather Service Green Bay WI
258 PM CDT Fri May 30 2025

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-312000-
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-
258 PM CDT Fri May 30 2025

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

.DAY ONE...Tonight

There is a chance of thunderstorms through early evening, with a
marginal risk of severe storms in eastern Wisconsin. A few of the
strongest storms may produce wind gusts of 40 to 60 mph and hail
up to 1 inch in diameter.

Smoke from Canadian wildfires will impact the region through
tonight. The smoke may reduce visibility and cause air quality
issues. An Air Quality Advisory is in effect for the entire area.

.DAYS TWO THROUGH SEVEN...Saturday through Friday

There is chance of thunderstorms and heavy rainfall during the
middle of next week.

.SPOTTER INFORMATION STATEMENT...

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

LMZ521-522-541>543-312000-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
258 PM CDT Fri May 30 2025

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

.DAY ONE...Tonight

There is a chance of thunderstorms through late afternoon.

A Small Craft Advisory is in effect for the bay and Lake Michigan
nearshore waters from Washington Island to Sturgeon Bay from 4 PM
to 10 PM today. North winds are expected to gust over 25 knots at
times.

.DAYS TWO THROUGH SEVEN...Saturday through Friday

There is a chance of thunderstorms during the middle of next
week.

KLJ

In the hours before

Special weather statement, May 30, 3:16 PM CDT, 1 hour 27 minutes before

Special Weather Statement
National Weather Service Green Bay WI
316 PM CDT Fri May 30 2025

WIZ022-073-302045-
Southern Marinette County WI-Door WI-
316 PM CDT Fri May 30 2025

...A STRONG THUNDERSTORM WILL IMPACT SOUTHERN MARINETTE AND SOUTHERN
DOOR COUNTIES THROUGH 345 PM CDT...

At 316 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles northwest of Menominee, or 9 miles northwest of Marinette,
moving south at 30 mph.

HAZARD...Wind gusts up to 40 mph and penny size hail.

SOURCE...Radar indicated.

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

This strong thunderstorm will be near...
  Marinette around 330 PM CDT.

Other locations impacted by this storm include Maplewood,
Porterfield, Harmony, and Peshtigo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4473 8777 4482 8769 4486 8778 4480 8784
      4493 8784 4499 8776 4499 8785 4526 8788
      4528 8770 4517 8774 4511 8760 4514 8761
      4514 8760 4500 8756 4491 8777 4487 8777
      4483 8769 4491 8753 4475 8748
TIME...MOT...LOC 2016Z 352DEG 22KT 4518 8776

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

MPC

Special weather statement, May 30, 4:14 PM CDT, 29 minutes before

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Local storm report, May 30, 4:18 PM CDT, 25 minutes before

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Special weather statement, May 30, 4:30 PM CDT, 13 minutes before

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Local storm report, May 30, 4:40 PM CDT, 3 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 30, 4:16 AM CDT	Small Craft Advisory	GRB		18 hr
May 30, 3:16 PM CDT	Special Weather Statement	GRB	Oconto	29 min
May 30, 3:24 PM CDT	Special Marine Warning	GRB		56 min
May 30, 4:14 PM CDT	Special Weather Statement	GRB	Shawano	31 min
May 30, 4:30 PM CDT	Special Weather Statement	GRB	Kewaunee	30 min
May 30, 4:43 PM CDT	Special Marine Warning	GRB		32 min
May 30, 5:13 PM CDT	Special Weather Statement	GRB	Outagamie	47 min
May 30, 5:16 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Manitowoc	29 min
May 30, 5:39 PM CDT	Special Weather Statement	GRB	Winnebago	36 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; radar from the NEXRAD Level II archive.