Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 42, NWS Green Bay, WI

June 19, 2025Brown County, Manitowoc County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jun 19, 2025, 7:30 PM CDT for Brown County, Manitowoc County, Wisconsin. It was in force for 34 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: Jun 19, 2025, 7:30 PM CDT (00:30 UTC)
Expired: Jun 19, 2025, 8:04 PM CDT
In force: 34 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Brown County, WI, Manitowoc County, WI

The radar

The Green Bay radar (KGRB), 32 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 nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.5 hours before the alert went out and 30 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: 537 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1857 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 Jun 19, 6:47 PM CDT, 43 minutes earlier.

Area forecast discussion, Jun 19, 6:47 PM CDT, 43 minutes before

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Hazardous weather outlook, Jun 19, 1:59 PM CDT, 5 hours 31 minutes before

Hazardous Weather Outlook
National Weather Service Green Bay WI
159 PM CDT Thu Jun 19 2025

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-201900-
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-
159 PM CDT Thu Jun 19 2025

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

.DAY ONE...Tonight

There is a chance of thunderstorms through late tonight. An
isolated severe storm is possible through 10 pm with large hail
and damaging winds.

.DAYS TWO THROUGH SEVEN...Friday through Thursday

Thunderstorms will be possible at times from Friday morning
through Saturday morning. The greatest risk of strong or severe
storms will be overnight Friday night into Saturday morning as a
thunderstorm complex is expected move across the area. There is
also the potential for torrential rainfall with the stronger
storms. Thunderstorms are also possible early to mid next week,
however it is too early to determine if storms would become
severe.

A multi-day period of dangerous heat are forecast from Saturday
through Monday. Heat index values are expected to reach 95
degrees to 105 degrees each afternoon. Low temperatures in the mid
to upper 70s will provide minimal relief to the heat and
humidity.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon, and again at
times on Friday into Saturday morning.

LMZ521-522-541>543-201900-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
159 PM CDT Thu Jun 19 2025

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

.DAY ONE...Tonight

Thunderstorms are possible at times this afternoon and tonight
that would pose a hazard to mariners.

.DAYS TWO THROUGH SEVEN...Friday through Thursday

Thunderstorms will be possible at times Friday through Saturday
morning, and then again early next week. Any thunderstorms that
form would pose a hazard to mariners. It is possible that the
storms late Friday night into Saturday morning could bring
a significant risk of very strong winds.

Increasing southerly winds and building waves could create
hazardous conditions for small craft from late Friday night
through the weekend. Dense marine fog may be possible at times
Friday into early next week, especially on Lake Michigan.

MPC/Uhlmann

In the hours before

Local storm report, Jun 19, 4:51 PM CDT, 2 hours 39 minutes before

Preliminary Local Storm Report
National Weather Service Green Bay WI
451 PM CDT Thu Jun 19 2025

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

0428 PM     Hail             5 E Tripoli             45.54N 89.90W
06/19/2025  M1.00 Inch       Lincoln            WI   Trained Spotter

            Located near West Bay Drive and Honey Road
            in Tripoli.

&&

KJ

Special weather statement, Jun 19, 4:54 PM CDT, 2 hours 36 minutes before

Special Weather Statement
National Weather Service Green Bay WI
454 PM CDT Thu Jun 19 2025

WIZ021-073-074-192230-
Southern Oconto County WI-Southern Marinette County WI-
Northern Oconto County WI-
454 PM CDT Thu Jun 19 2025

...A STRONG THUNDERSTORM WILL IMPACT CENTRAL OCONTO COUNTY THROUGH
530 PM CDT...

At 454 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles west of Pound, or 27 miles northeast of Shawano, moving
southeast at 20 mph.

HAZARD...Wind gusts up to 30 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 storm will remain over mainly rural areas of central Oconto
County, including the following locations... Klondike and Coleman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4506 8830 4511 8823 4506 8799 4493 8813
TIME...MOT...LOC 2154Z 306DEG 18KT 4507 8821

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...30 MPH

Uhlmann

Special weather statement, Jun 19, 4:57 PM CDT, 2 hours 33 minutes before

Special Weather Statement
National Weather Service Green Bay WI
457 PM CDT Thu Jun 19 2025

WIZ019>021-192230-
Langlade WI-Northern Oconto County WI-Menominee WI-
457 PM CDT Thu Jun 19 2025

...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN MENOMINEE...NORTHERN
OCONTO AND SOUTHEASTERN LANGLADE COUNTIES THROUGH 530 PM CDT...

At 457 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Mountain to near White Lake to 8 miles
south of Ma Ka Ja Wan Scout Reservation. Movement was southeast at 35
mph.

HAZARD...Wind gusts up to 30 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.

Strong thunderstorms will be near...
  Mountain, White Lake, and Gardner Dam Scout Camp around 505 PM
  CDT.
  Bear Paw Scout Camp around 510 PM CDT.

Other locations impacted by these storms include Boot Lake
Campground, Elton, Breed, Fredenberg Lake, Boulder Lake Campground,
Hollister, Langlade, and Lily.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4512 8828 4504 8837 4504 8882 4524 8897
      4533 8877 4526 8853
TIME...MOT...LOC 2157Z 309DEG 28KT 4522 8857 4522 8872 4525 8891

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...30 MPH

Uhlmann

Special weather statement, Jun 19, 5:24 PM CDT, 2 hours 6 minutes before

Special Weather Statement
National Weather Service Green Bay WI
524 PM CDT Thu Jun 19 2025

WIZ018-019-030-192300-
Langlade WI-Marathon WI-Lincoln WI-
524 PM CDT Thu Jun 19 2025

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN LINCOLN...
NORTHEASTERN MARATHON AND SOUTHWESTERN LANGLADE COUNTIES THROUGH 600
PM CDT...

At 523 PM CDT, Doppler radar was tracking a strong thunderstorm near
Dutch Corners, or 15 miles west of Antigo, moving southeast at 25
mph.

HAZARD...Wind gusts up to 30 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.

This storm will remain over mainly rural areas of southeastern
Lincoln, northeastern Marathon and southwestern Langlade Counties,
including the following locations... Glandon, Ackley Wildlife Area,
Doering, and Hogarty.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4515 8963 4530 8946 4513 8914 4495 8938
TIME...MOT...LOC 2223Z 313DEG 25KT 4517 8947

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...30 MPH

Uhlmann

Local storm report, Jun 19, 7:11 PM CDT, 19 minutes before

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Special weather statement, Jun 19, 7:11 PM CDT, 19 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
Jun 19, 7:11 PM CDT	Special Weather Statement	GRB	Brown	34 min
Jun 19, 8:24 PM CDT	Special Weather Statement	GRB	Calumet	21 min
Jun 19, 10:58 PM CDT	Special Weather Statement	GRB	Wood	47 min
Jun 19, 11:51 PM CDT	Special Weather Statement	GRB	Wood	39 min
Jun 20, 1:47 AM CDT	Special Weather Statement	GRB	Wood	43 min
Jun 20, 2:28 AM CDT	Special Weather Statement	GRB	Portage, Wood	47 min
Jun 20, 2:56 AM CDT	Heat Advisory	GRB	Brown, Calumet, Door, Florence, Forest, Kewaunee and 16 more	4 days
Jun 20, 3:06 AM CDT	Special Weather Statement	GRB	Marathon	39 min
Jun 20, 5:02 AM CDT	Small Craft Advisory	GRB		4 days
Jun 20, 5:03 AM CDT	Beach Hazards Statement	GRB	Door, Kewaunee, Manitowoc	4 days

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.