An area of thunderstorms produced a bolt of lightning, striking a residence in the Townsend area. The lightning caused a fire and produced extensive damage to the home, estimated to be around $100,000.
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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.
An area of thunderstorms produced a bolt of lightning, striking a residence in the Townsend area. The lightning caused a fire and produced extensive damage to the home, estimated to be around $100,000.
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 10, 6:04 AM CST, 1 hour 46 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Green Bay WI 704 AM CDT Wed Jun 10 2026 Updated aviation portion for 12Z TAF issuance .KEY MESSAGES... - Multiple rounds of strong to severe thunderstorms through this evening. There is no one time frame of the day and evening that is more favored than others for thunderstorms. There is an enhanced risk for severe weather as storm complexes move through, including damaging winds, large hail, and an isolated tornado. - Additional strong to severe thunderstorms are expected Thursday afternoon into Thursday evening. - Heavy rain is an increasing hazard today through Thursday. Localized flooding is expected where heavy rain occurs. - Dense fog over northeast WI to Lake Michigan this morning will create hazardous travel conditions. - Very warm and humid through Thursday. Peak of heat today with heat indices potentially into the lower 90s if there is enough break in between rounds of storms. Cooling trend later this weekend into next week. && .DISCUSSION... Issued at 200 AM CDT Wed Jun 10 2026 Main changes: Plethora of upstream convectively induced shortwaves has resulted in multiple waves of storms today. Given instability building in over the area, any of these rounds of storms could be strong to severe. First round arrives over much of the area through mid morning, with additional round moving in earlier in the afternoon. A potential third round could impact the region this evening. All severe hazards still could occur. No change there. However, given multiple rounds of storms with heavy rain, risk of flooding will increase where episodes of heaviest rain overlap. HREF 95th percentile for 24hr rainfall ending at 7am on Thursday shows widespread net of 3-4 inches of rain, maximized over central WI where there is better chance of multiple rounds of heavy rain. Severe and Heavy Rain Potential Through Tonight...First up is squall line over eastern Dakotas, arcing into southern MN. Complex is on leading edge of mid-upper jet and on nose of 60+ kt low- level jet just upstream of MLCAPEs of 4000j/kg. CAPE gradient shifts northeast into WI by 12z as warm front arrives. 00z HRRR and ARW matching reality best and show this line of storms into central/north-central WI by 12z supported by sufficient 0-1km shear downstream of the building instability. Severe thunderstorm watch is in effect until 7a into western WI. Expect the storms to cross northern WI this morning (exiting by 10-11a) with severe winds a possibility. Next round of storms then looks to arrive earlier, during the mid to late afternoon with genesis region in western IA this morning as next shortwave/increasing H5 jet interacts with reservoir of untapped instability ahead of approaching cold front. If something close to the decently agreed CAM guidance is correct, severe storms may be breaking out over central WI by early this afternoon, with the main line moving through soon thereafter. No real change in very favorable, high-end parameter space for developing storms to interact. MLCAPEs over 2500J/kg, mid-level lapse rates over 7c/km and very ample CAPE in hail growth favor very large hail while mid-level dry air and DCAPE up to 1000 j/kg lead to damaging winds. Backed flow in low-levels, likely due to earlier day convection/outflows, results in 0-1km/0-3km SRH that favors the potential for tornadoes, especially with discrete cells that form in the afternoon. Additional convection could occur in bows/lines into the early evening, but trying to get specific how that will unfold is pretty dicey given there could be multiple complexes of storms that occur before then that will no doubt impact the ambient convective environment. The best advice today is to keep up to date with the forecast as it will be changing based on near term trends, and have multiple ways to receive warnings. Again, given the multiple rounds of heavy rain could see the need for a flood watch later today once it becomes clearer where swaths of heavy rain set up and if they overlap in similar areas. Currently HREF PMM/LPMM 24hr rainfall ending at 7am on Thursday suggest the most likely areas to see 2+ inches with maxes up to 4 inches will be over portions of central to north-central WI. WPC highlights almost all of our area in a Slight risk for Excessive Rainfall. Typically when we have a Slight Risk we will see at least isolated flash flooding occur. Just where that occurs in this scenario will be the primary question. Otherwise for today, given the multiple rounds of storms, think it is going to be a challenge to realize heat index values flirting with upper 90s to near 100. Forecast temps have been lowered, with most spots remaining in the 80s. And, some models would indicate that may be even optimisitic, for at least some areas. Fog near Lake Michigan and over northeast WI is expected to fade by late morning, but convection during the morning and outflows could alter that idea along the lake. Will be yet another something to keep eye on today as it leads to hazardous travel with the lower visibility and will have direct impact on instability that is present this afternoon. A lull still looks to be in store later tonight after convection ends by late evening. Still warm and humid with patchy fog. Severe and Heavy Rain Potential Thursday...No large change in the idea that a second and more potent shortwave tracks toward the region on Thursday afternoon, causing an associated surface low to lift northeast directly into southeast or east-central Wisconsin by Thursday evening. Widespread showers and thunderstorms will accompany this system, fueled by a deep plume of moisture with precipitable water values climbing well above normal. Severe threat may develop in the afternoon over east- central Wisconsin where instability increases to around 1000 J/kg under strong deep layer shear of 50 to 60 kts. At current, greatest risk for severe wind and the potential for tornadoes may remain just south of Fox Valley/lakeshore. However, probabilty for hail would be maximized due to the strong shear and sufficient instability. That said, will not take too much of a jog north in the effective warm front to put all severe hazards in play over especially central and east-central WI on Thursday. Other issue will be heavy rain. Signal that showed up yesterday on NBM and LREF remains in place this morning, with widespread higher-end percentiles depicting at least 2 inches of rain along and just north of the track of the sfc low, with 95th percentile showing 2.5 to 3.5 inches for the far southern portions of the area. These amounts would easily lead to urban or low-lying flooding if they impact the Fox Valley. Depending on rainfall amounts today and tonight, these areas could be looking at the need for a flood watch on Thursday. Convection will wind down by mid-evening following the passage of a strong cold front. A much cooler and drier weather pattern will return to the western Great Lakes Friday into early next week as a broad longwave trough sets up from the Hudson Bay down into the region. On the southern periphery of this cold pool aloft, spotty diurnally driven showers and storms look possible on Friday and Saturday afternoons. Saturday still standing out as having the slightly better potential for scattered afternoon showers and storms due to the passage of a secondary cold front and building daytime instability as highs now look to reach back into the lower 80s in parts of the area. In fact, higher end CAPEs around 1000 J/kg now shown could result in at least a small shot of isolated severe potential given enough shear. Will be something to keep eye on in the coming days. By Sunday and early next week, behind the front dry air and persistent high pressure will take hold, dropping temperatures slightly below seasonal normals. && .AVIATION...for 12Z TAF Issuance Issued at 703 AM CDT Wed Jun 10 2026 Warm front lifting across the area supports multiple rounds of strong to severe storms through this evening. Greatest potential at TAF sites will occur through late this morning, then again mid afternoon into early this evening ahead of approaching cold front. Tried to frame this out, though confidence is higher in morning activity versus afternoon and evening. LIFR-IFR cigs closer to Lake Michigan and the bay will improve to MVFR-VFR this afternoon. Lowest vsby will be at MTW through mid morning, before improvement occurs there as fog begins to lift. Conditions will gradually improve late this evening and overnight, though additional fog (IFR-MVFR vsby) may occur late tonight. && .GRB WATCHES/WARNINGS/ADVISORIES... Dense Fog Advisory until 10 AM CDT this morning for WIZ011>013- 019>022-031-040-050-073-074. && DISCUSSION.....JLA AVIATION.......JLA
Hazardous Weather Outlook National Weather Service Green Bay WI 228 AM CDT Wed Jun 10 2026 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-110730- 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- 228 AM CDT Wed Jun 10 2026 This Hazardous Weather Outlook is for north-central and northeast Wisconsin. .DAY ONE...Today and Tonight Scattered thunderstorms will impact portions of central to north- central WI this morning. Strong to severe wind gusts are possible. Additional rounds of strong to severe thunderstorms will occur over the entire area this afternoon into this evening. All severe hazards could occur, including damaging winds, large hail, and the potential for a tornado. Heavy rain is expected and localized flooding could become an issue for areas where repeated rounds of heavy rain occur. Areas of dense fog will result in sharply reduced visibility and hazardous driving conditions this morning from northeast Wisconsin to the lakeshore. A Dense Fog Advisory is in effect until 10 am this morning. A period of dangerous heat with high humidity could occur this afternoon if the breaks between rounds of storms is long enough. The area most impacted would be central Wisconsin into the Fox Valley. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Another round of strong to severe thunderstorms and heavy rain are expected Thursday afternoon and Thursday evening over northeast Wisconsin and east-central WI. Localized flooding could occur. .SPOTTER INFORMATION STATEMENT... Spotters are requested to report any wind damage, hail, or flooding to the National Weather Service in Green Bay. LMZ521-522-541>543-110730- The Bay of Green Bay south of a line from Cedar River MI to Rock Island Passage-Lake Michigan from Washington Island to Sheboygan- 228 AM CDT Wed Jun 10 2026 This Hazardous Weather Outlook is for portions of northwest Lake Michigan and the waters of Green Bay. .DAY ONE...Today and Tonight Scattered thunderstorms will impact the bay and northern portions of lake Michigan later this morning. Strong wind gusts are possible. Additional rounds of strong to severe thunderstorms will occur this afternoon into this evening. Any thunderstorm could pose a hazard to mariners. Areas of fog may be dense this morning. A Marine Dense Fog Advisory is in effect until 10 am this morning. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Additional thunderstorms are expected Thursday afternoon through Thursday evening. Any thunderstorm could pose a hazard to mariners. JLA
Preliminary Local Storm Report
National Weather Service Green Bay WI
727 AM CDT Wed Jun 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0706 AM Tstm Wnd Dmg Athens 45.03N 90.07W
06/10/2026 Marathon WI 911 Call Center
Tree down along highway 97.
&&Preliminary Local Storm Report
National Weather Service Green Bay WI
737 AM CDT Wed Jun 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0727 AM Tstm Wnd Gst Wausau 44.96N 89.63W
06/10/2026 M45 MPH Marathon WI ASOS
Measured at Wausau Downtown Airport.
&&Special Weather Statement
National Weather Service Green Bay WI
751 AM CDT Wed Jun 10 2026
WIZ010-019-020-031-101345-
Oneida WI-Menominee WI-Shawano WI-Langlade WI-
751 AM CDT Wed Jun 10 2026
...A LINE OF STRONG THUNDERSTORMS WILL IMPACT NORTHERN MENOMINEE...
LANGLADE...SOUTHEASTERN ONEIDA AND WESTERN SHAWANO COUNTIES UNTIL 845
AM CDT...
At 751 AM CDT, Doppler radar was tracking a line of strong
thunderstorms extending from near Dutch Corners to 9 miles north of
Bevent, or extending from 20 miles north of Wausau to 16 miles east
of Wausau, moving northeast at 45 mph.
HAZARD...Wind gusts up to 50 to 55 mph and half inch 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...
Antigo around 800 AM CDT. Parrish around 810 AM CDT. Veterans
Memorial County Park around 815 AM CDT. Pearson, Ma Ka Ja Wan Scout
Reservation, White Lake and Neopit around 825 AM CDT. Gardner Dam
Scout Camp and Big Smokey Falls around 835 AM CDT.
Other locations impacted by this strong thunderstorm include Ackley
Wildlife Area, Eland, Birnamwood, Aniwa, Elmhurst, Ormsby, Deerbrook,
Bavaria, Mattoon and Kempster.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4543 8942 4558 8905 4546 8905 4546 8892
4538 8893 4538 8869 4537 8868 4521 8868
4520 8864 4512 8864 4512 8861 4501 8859
4484 8922 4512 8922 4512 8943
TIME...MOT...LOC 1251Z 243DEG 40KT 4525 8963 4513 8932 4488 8933
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
JMSpecial Weather Statement
National Weather Service Green Bay WI
828 AM CDT Wed Jun 10 2026
WIZ020-030-031-035>037-101400-
Portage WI-Menominee WI-Shawano WI-Marathon WI-Wood WI-Waupaca WI-
828 AM CDT Wed Jun 10 2026
...A LINE OF STRONG THUNDERSTORMS WILL IMPACT SOUTHERN MENOMINEE...
PORTAGE...NORTHERN WAUPACA...SOUTHEASTERN MARATHON...WESTERN SHAWANO
AND WOOD COUNTIES UNTIL 9 AM CDT...
At 828 AM CDT, Doppler radar was tracking a line of strong
thunderstorms extending from 10 miles east of Wittenberg to near
Pittsville, or extending from 19 miles west of Shawano to 12 miles
west of Wisconsin Rapids, moving east at 25 mph.
HAZARD...Wind gusts up to 40 to 50 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.
Locations impacted include...
Stevens Point, Wisconsin Rapids, Marshfield, Clintonville, Whiting,
Bevent, Wittenberg, Amherst, Pittsville, Embarrass, Lake Wazeecha,
Neopit, Babcock, Keshena, Plover, Stockton, Nekoosa and Knowlton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
Torrential rainfall is also occurring with these storms and may lead
to flash flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4468 9023 4480 8944 4485 8922 4503 8859
4459 8871 4459 8874 4447 8874 4426 9014
TIME...MOT...LOC 1327Z 286DEG 20KT 4482 8896 4462 8918 4445 9005
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
JMSpecial Weather Statement
National Weather Service Green Bay WI
841 AM CDT Wed Jun 10 2026
WIZ005-010>013-019>021-073-074-101500-
Oneida WI-Southern Marinette County WI-Northern Oconto County WI-
Menominee WI-Forest WI-Langlade WI-Southern Oconto County WI-
Vilas WI-Northern Marinette County WI-Florence WI-
841 AM CDT Wed Jun 10 2026
...A LINE OF STRONG THUNDERSTORMS WILL IMPACT MARINETTE...
NORTHEASTERN MENOMINEE...FLORENCE...FOREST...EASTERN LANGLADE...
EASTERN ONEIDA...SOUTHEASTERN VILAS AND NORTHERN OCONTO COUNTIES
UNTIL 10 AM CDT...
At 841 AM CDT, Doppler radar was tracking a line of strong
thunderstorms extending from 12 miles southwest of Headwaters
Wilderness to near Neopit, or extending from 15 miles east of
Rhinelander to 19 miles northwest of Shawano, moving east at 40 mph.
HAZARD...Wind gusts up to 40 to 50 mph and half inch 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...
Crandon, Carter, Gardner Dam Scout Camp, Neopit, Woodlawn and White
Lake around 845 AM CDT. Big Smokey Falls around 850 AM CDT.
McCaslin Mountain Natural Area, North Otter Creek Natural Area,
South Branch and Headwaters Wilderness around 855 AM CDT. Mountain
around 900 AM CDT. Bear Paw Scout Camp around 905 AM CDT. Popple
River around 915 AM CDT. Goodman and Tipler around 920 AM CDT.
Other locations impacted by this strong thunderstorm include
Townsend, Boulder Lake Campground, Boot Lake Campground, Gagen,
Langlade, Three Lakes, Choate, Middle Village, Starks and Monico.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4606 8890 4599 8866 4599 8867 4592 8810
4587 8807 4581 8813 4575 8788 4568 8778
4566 8783 4560 8777 4556 8783 4550 8779
4536 8789 4535 8789 4537 8787 4535 8781
4512 8788 4494 8883 4525 8883 4574 8937
TIME...MOT...LOC 1340Z 249DEG 35KT 4571 8914 4529 8862 4501 8877
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
JMThe Green Bay radar (KGRB), 99 km away, was scanning. The volume nearest the first event began at 13:50 UTC.
1 lightning. Local standard time, as filed.
A bolt of lightning struck a residence in the Townsend area, which started a fire and produced extensive damage to the home, estimated to be around $100,000.
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: 1332044.