Scattered thunderstorms developed near a warm front across central and east-central Wisconsin during the afternoon and evening hours on Wednesday (6/24). The strongest storms produced large hail up to golf ball size along with flash flooding in Green Bay.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GRB wrote it up.
Scattered thunderstorms developed near a warm front across central and east-central Wisconsin during the afternoon and evening hours on Wednesday (6/24). The strongest storms produced large hail up to golf ball size along with flash flooding in Green Bay.
The local office's own words before the first event, 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 the first event at Jun 24, 12:46 PM CST, 57 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Green Bay WI 146 PM CDT Wed Jun 24 2026 Forecast discussion for routine afternoon forecast issuance .KEY MESSAGES... - Chances for showers and storms at times through Thursday afternoon. Some of the storms this afternoon and evening may become severe, producing large hail and damaging winds. - Near to below normal temperatures rest of this week, trending above normal and humid by early next week. Periodic chances for thunderstorms are also possible early next week, with the potential for severe weather. && .DISCUSSION... Issued at 146 PM CDT Wed Jun 24 2026 Precipitation/Thunder Chances...Scattered low clouds prevailed across the region early this afternoon ahead of an impending surface low and it's weak cold front. Decent destabilization has already occurred over western WI early this afternoon with SBCAPE of 1500- 2000 J/kg, paired with 30-40 of effective bulk shear across central WI. As a result, isolated storms have developed in portions of northern WI and west-central WI, some of which have already had reports of severe hail. Generally, scattered to numerous showers and storms are anticipated this afternoon and evening, ending soon after sunset with the loss of diurnal heating. SBCAPE of 1500-2000 J/kg and deep-layer shear of 30-40 kts is anticipated during this time, leading to updraft organization producing a mix of multicells, supercells, and perhaps some splitting cells, aiding in a risk of large hail up to 1.50 inches and damaging winds up to 60 mph. There is also a very low risk for spin ups or funnel clouds due to the proximity to the surface low and steeper low-level lapse rates, mainly in central and north-central WI. As the surface low and a mid-level trough move over MI on Thursday, additional isolated showers and storms are anticipated Thursday afternoon into the early evening, aided by up to 500 J/kg of CAPE. However, no severe weather is expected. Models continue to indicate a stark pattern change occurring this weekend with an upper-level ridge building over the area before breaking down sometime during the middle of next week. This would bring more summer-like conditions to the area with increasing Gulf moisture and potential ridge riders resulting in thunderstorms at times, including possible severe storms at times. Will continue to watch how this pattern change evolves over the coming days for any impactful weather. At this point, the main takeaway is to plan on a much more active weather pattern developing, with storm potential not tied exclusively to peak heating of the day. Fog Potential...Following the showers and storms this afternoon and evening, some fog could occur late tonight, with best chances of sharply reduced visibility over northern WI and maybe closer to Lake Michigan. Agreement on this is not great though. Temperatures...Below normal temperatures in the low to mid 70s and comfortable humidity levels will continue through Friday. Temperatures then gradually warm to normal on Saturday and above normal on Sunday through early next week into the upper 80s to mid 90s due to the ridging pattern change. In addition to the much warmer temperatures, dew points will also rise into the low to possible mid 70s by Monday. If this pattern pans out, we could be looking at a couple day stretch of heat-related impacts occurring. This is already being highlighted with the NWS HeatRisk on Monday with the Major (level 3 of 4) category and Major with some Extreme (level 4 of 4) category on Tuesday. && .AVIATION...for 18Z TAF Issuance Issued at 113 PM CDT Wed Jun 24 2026 Scattered to broken MVFR/low-end VFR cigs prevailed across the region early this afternoon as isolated showers and storms began to develop in portions of north-central and far northeast WI. The isolated showers and storms will become more scattered in coverage as the afternoon goes on and becoming less in coverage as the sunsets. Decided to include TSRA with TEMPO groups at all TAF sites when confidence is greatest. Otherwise, the showers are anticipated to end between 02-06z Thu. Some stronger storms may occur this afternoon and evening with hail and gusty winds being the main threats. MVFR cigs/vsbys will also accompany the stronger storms. Cigs are anticipated to drop to MVFR and IFR overnight into Thursday morning. Fog may also develop late tonight across north-central and far northeast WI, and along the lakeshore, lifting by 12z Thu. && .GRB WATCHES/WARNINGS/ADVISORIES... None. && DISCUSSION.....Kruk AVIATION.......Kruk
Hazardous Weather Outlook National Weather Service Green Bay WI 116 PM CDT Wed Jun 24 2026 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-251830- 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- 116 PM CDT Wed Jun 24 2026 This Hazardous Weather Outlook is for north-central and northeast Wisconsin. .DAY ONE...This Afternoon and Tonight Scattered thunderstorms will diminish during the evening. A few storms may be severe, producing large hail and damaging winds. .DAYS TWO THROUGH SEVEN...Thursday through Wednesday There is a small chance for thunderstorms Thursday afternoon. Severe weather is not expected. The chance for thunderstorms will increase early next week. It is too early to determine if storms will be severe, but the pattern would support severe weather. In addition, hot and humid conditions may build across the area early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon. LMZ521-522-541>543-251830- The Bay of Green Bay south of a line from Cedar River MI to Rock Island Passage-Lake Michigan from Washington Island to Sheboygan- 116 PM CDT Wed Jun 24 2026 This Hazardous Weather Outlook is for portions of northwest Lake Michigan and the waters of Green Bay. .DAY ONE...This Afternoon and Tonight Scattered thunderstorms are expected through late this evening. Any thunderstorms will pose a hazard for mariners. .DAYS TWO THROUGH SEVEN...Thursday through Wednesday There is a small chance of thunderstorms Thursday afternoon. More thunderstorms are possible Sunday through Tuesday. Any thunderstorms will pose a hazard for mariners. JM/Kruk
Special Weather Statement
National Weather Service Green Bay WI
108 PM CDT Wed Jun 24 2026
WIZ005-010-241845-
Oneida WI-Vilas WI-
108 PM CDT Wed Jun 24 2026
...A LINE OF STRONG THUNDERSTORMS WILL IMPACT NORTHERN ONEIDA AND
SOUTHWESTERN VILAS COUNTIES UNTIL 145 PM CDT...
At 108 PM CDT, Doppler radar was tracking a line of strong
thunderstorms extending from near Rainbow Flowage to 6 miles
northwest of Willow Lake, or extending from 13 miles southwest of
Eagle River to 33 miles west of Rhinelander, moving east at 15 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 damage to outdoor objects is
possible.
The strong thunderstorm will be near...
Rainbow Flowage, Willow Lake and Willow Reservoir around 110 PM
CDT. Squirrel Lake, Crystal Lake Scout Reservation and Eagle River
around 140 PM CDT.
Other locations impacted by this strong thunderstorm include
Hazelhurst, Tomahawk River Pines Natural Area, Minocqua, St Germain,
Woodruff, Arbor Vitae, Lake Tomahawk, Sugar Camp and Mc Naughton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4593 9004 4594 8928 4571 8927 4571 9004
TIME...MOT...LOC 1808Z 268DEG 11KT 4583 8948 4581 8971 4580 9006
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
KurimskiSpecial Weather Statement
National Weather Service Green Bay WI
157 PM CDT Wed Jun 24 2026
WIZ030-241930-
Marathon WI-
157 PM CDT Wed Jun 24 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN MARATHON COUNTY
UNTIL 230 PM CDT...
At 157 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles northwest of Spencer, or 38 miles west of Wausau, moving east
at 20 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 damage to outdoor objects is
possible.
The strong thunderstorm will be near...
Abbotsford around 205 PM CDT. Spencer around 210 PM CDT. Marshfield
around 225 PM CDT.
Other locations impacted by this strong thunderstorm include Colby,
Unity, Cherokee, March Rapids and Stratford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4493 9032 4492 8991 4469 8995 4469 9013
4472 9032 4480 9032 4490 9031
TIME...MOT...LOC 1856Z 277DEG 19KT 4483 9040
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
KurimskiSpecial Weather Statement
National Weather Service Green Bay WI
213 PM CDT Wed Jun 24 2026
WIZ031-038-039-241945-
Outagamie WI-Brown WI-Shawano WI-
213 PM CDT Wed Jun 24 2026
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN OUTAGAMIE...EASTERN
SHAWANO AND NORTHERN BROWN COUNTIES UNTIL 245 PM CDT...
At 213 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles west of Green Bay, moving east at 25 mph.
HAZARD...Pea size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
The strong thunderstorm will be near...
Bellevue Town and Long Tail Point Light around 230 PM CDT.
Other locations impacted by this strong thunderstorm include Hobart,
Anston, Oneida, Kunesh, Pittsfield, Howard, Lambeau Field,
Ashwaubenon, De Pere and Allouez.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4463 8844 4465 8794 4463 8794 4464 8793
4465 8791 4466 8776 4459 8776 4443 8777
4447 8844
TIME...MOT...LOC 1913Z 268DEG 22KT 4454 8813
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH
KSPreliminary Local Storm Report
National Weather Service Green Bay WI
232 PM CDT Wed Jun 24 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0223 PM Funnel Cloud 5 S Spencer 44.69N 90.29W
06/24/2026 Marathon WI Public
&&Special Weather Statement
National Weather Service Green Bay WI
233 PM CDT Wed Jun 24 2026
WIZ018-242015-
Lincoln WI-
233 PM CDT Wed Jun 24 2026
...A LINE OF STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN LINCOLN
COUNTY UNTIL 315 PM CDT...
At 233 PM CDT, Doppler radar was tracking a line of strong
thunderstorms extending from 9 miles southwest of Tripoli to near New
Wood Wildlife Area, or extending from 36 miles west of Rhinelander to
31 miles southwest of Rhinelander, moving east at 15 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 damage to outdoor objects is
possible.
The strong thunderstorm will be near...
New Wood Wildlife Area around 235 PM CDT. Tripoli around 305 PM
CDT. Tomahawk and Gilbert around 310 PM CDT.
Other locations impacted by this strong thunderstorm include Spirit
Falls, Mccord and Bradley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4529 9003 4531 9005 4534 9005 4538 9004
4555 9004 4556 8987 4556 8971 4547 8969
4536 8965
TIME...MOT...LOC 1933Z 258DEG 11KT 4546 9013 4544 9000 4538 8996
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
KurimskiThe La Crosse radar (KARX), 125 km away, was scanning. The volume nearest the first event began at 19:45 UTC.
15 hail, 1 flash flood. Local standard time, as filed.
Quarter size hail fell near Marshfield. The time of this report is an estimate based on radar data.
Quarter size hail fell in Marshfield. The time of this report is an estimate based on radar data.
Penny size hail fell near Marshfield.
Penny size hail fell in Ashwaubenon. The time of this report is an estimate based on radar data.
Half dollar size hail fell in Rudolph. The time of this report is an estimate based on radar data.
Half dollar size hail fell in Wild Rose. The time of this report is an estimate based on radar data.
Quarter size hail fell near Krakow. The time of this report is an estimate based on radar data.
Golf ball size hail fell in Pulaski.
Quarter size hail fell near Stratford.
Nickel size hail fell near Anston.
Quarter size hail fell near Howard.
Golf ball size hail fell near Howard. The time of this report is an estimate based on radar data.
Half dollar size hail fell near Howard.
Ping pong size hail fell in Howard.
Several streets in Green Bay were flooded due to 2 to 4 inches of rain falling in a short period of time.
Penny size hail fell in Plover.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2026Every state in 2026This day in weather historyWarnings in Wisconsin, June 2026
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1337173, 1337174, 1337175, 1337176, 1337177, 1337178, 1337179, 1337180, 1337181, 1337182, 1337184, 1337191, 1337187, 1337189, 1333632, 1337193.