Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 69, NWS Green Bay, WI
NWS Green Bay, WI issued this severe thunderstorm warning at Jun 16, 2026, 2:17 PM CDT for Brown County, Kewaunee County, Wisconsin. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 16, 2026, 2:17 PM CDT (19:17 UTC)
- Expired
- Jun 16, 2026, 2:43 PM CDT
- In force
- 26 min
- Issued by
- NWS Green Bay, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Brown County, WI, Kewaunee County, WI
The radar
The Green Bay radar (KGRB), 36 km from the middle of the area, began a volume at 19:17 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 7.3 hours before the alert went out and 391 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.
- Mixed-layer CAPE
- 23 J/kg
- Mixed-layer CIN
- -151 J/kg
- Mixed-layer LCL
- 1674 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
681
WUUS53 KGRB 161917
SVRGRB
WIC009-061-162000-
/O.NEW.KGRB.SV.W.0069.260616T1917Z-260616T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
217 PM CDT Tue Jun 16 2026
The National Weather Service in Green Bay has issued a
* Severe Thunderstorm Warning for...
Eastern Brown County in northeastern Wisconsin...
Southwestern Kewaunee County in northeastern Wisconsin...
* Until 300 PM CDT.
* At 217 PM CDT, a severe thunderstorm was located 6 miles southeast
of Luxemburg, or 6 miles west of Kewaunee. This storm was nearly
stationary.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* This severe thunderstorm will be near...
Kewaunee and Kewaunee Pierhead Light around 220 PM CDT.
Other locations impacted by the severe thunderstorm include
Birchwood, Scarboro, Neuern, Slovan, Casco, Rostok, Krok, Ellisville,
East Krok and Stangelville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing large hail.
&&
LAT...LON 4440 8777 4442 8782 4456 8765 4451 8747
4433 8751
TIME...MOT...LOC 1917Z 19DEG 1KT 4447 8763
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
JG2 follow-up statements
722
WWUS53 KGRB 161930
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
230 PM CDT Tue Jun 16 2026
WIC009-161940-
/O.CAN.KGRB.SV.W.0069.000000T0000Z-260616T2000Z/
Brown WI-
230 PM CDT Tue Jun 16 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR EASTERN BROWN
COUNTY...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
&&
LAT...LON 4445 8777 4453 8766 4451 8748 4437 8751
4440 8777
TIME...MOT...LOC 1917Z 19DEG 1KT 4447 8763
$$
WIC061-162000-
/O.CON.KGRB.SV.W.0069.000000T0000Z-260616T2000Z/
Kewaunee WI-
230 PM CDT Tue Jun 16 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 3 PM CDT FOR
SOUTHWESTERN KEWAUNEE COUNTY...
At 230 PM CDT, a severe thunderstorm was located 7 miles southeast of
Luxemburg, or 6 miles west of Kewaunee. This storm was nearly
stationary.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
This severe thunderstorm will be near...
Kewaunee and Kewaunee Pierhead Light around 235 PM CDT.
Other locations impacted by the severe thunderstorm include
Birchwood, Scarboro, Rostok, Krok, Ellisville, East Krok,
Stangelville, Pilsen and Cherneyville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing large hail.
&&
LAT...LON 4445 8777 4453 8766 4451 8748 4437 8751
4440 8777
TIME...MOT...LOC 1917Z 19DEG 1KT 4447 8763
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
JG065
WWUS53 KGRB 161943
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
243 PM CDT Tue Jun 16 2026
WIC061-161953-
/O.CAN.KGRB.SV.W.0069.000000T0000Z-260616T2000Z/
Kewaunee WI-
243 PM CDT Tue Jun 16 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR SOUTHWESTERN KEWAUNEE
COUNTY...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However, small hail is
still possible with this thunderstorm.
&&
LAT...LON 4440 8777 4445 8777 4453 8766 4451 8748
4437 8751
TIME...MOT...LOC 1930Z 19DEG 1KT 4446 8763
$$
JGWhat 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 16, 12:37 PM CDT, 1 hour 40 minutes earlier. Its key messages:
- Showers and storms expected (60-90% chance) this afternoon. Most storms will produce small hail and gusty winds. An isolated storm could produce quarter sized hail.
- Another round of showers and storms are expected for Wednesday (80-100% chance). Potential for organized severe weather remains low, but a few strong storms with small hail and gusty winds may occur. Moderate to heavy rainfall will have a 60- 80% chance of exceeding 1 inch of rain.
- Below average temperatures in the 60s and 70s through the week.
Area forecast discussion, Jun 16, 12:37 PM CDT, 1 hour 40 minutes before
Area Forecast Discussion National Weather Service Green Bay WI 1237 PM CDT Tue Jun 16 2026 Updated aviation portion for 18Z TAF issuance .KEY MESSAGES... - Showers and storms expected (60-90% chance) this afternoon. Most storms will produce small hail and gusty winds. An isolated storm could produce quarter sized hail. - Another round of showers and storms are expected for Wednesday (80-100% chance). Potential for organized severe weather remains low, but a few strong storms with small hail and gusty winds may occur. Moderate to heavy rainfall will have a 60- 80% chance of exceeding 1 inch of rain. - Below average temperatures in the 60s and 70s through the week. && .DISCUSSION... Issued at 310 AM CDT Tue Jun 16 2026 A period of active weather is expected through the middle of the week as a pair of shortwaves move through the area. Additional rain chances then arrive towards the middle of the week as well. Today... A shortwave trough will cross the region today, bringing a wide area of rain and a few storms into the area for the afternoon and evening. Modest instability near the surface combined with upper support from the shortwave will support scattered convection, but with a lack of shear more organized storms are unlikely. Therefore would expect most storms to be short-lived and pulse-like. Although this setup will not favor severe storms, given the relatively low freezing levels and decent mid-level lapse rates around 7 C/km, would expect some small hail to be possible within any storms. Wednesday... Another, stronger shortwave drops towards the region on Wednesday, bringing another round of showers and storms into the region. The track of the accompanying surface low remains somewhat variable, but most mid to long range guidance does keep it south of the region. This would keep the warm front and more unstable air and moisture south of the area, and greatly limit the overall severe potential in northeastern Wisconsin. That said, some overrunning moisture from the surface warm front combined with surface heating and plenty of shear will still support convection, and given the strong winds through the lower levels and relatively cold airmass aloft, some isolated damaging winds and hail will still be possible. Best potential for any stronger storms will be from central to east-central Wisconsin. Heavy rainfall will also be possible with any convection, with probabilistic guidance continuing to paint out around 60-80% chance for at least an inch of rain and some modest 10-25% chance of two inches. There is a Marginal Risk of Excessive Rainfall stretching across central to east-central Wisconsin and southwards as well. Rest of the forecast period...Another brief round of scattered (20-30% chance) showers will be possible on Thursday, driven primarily by strong surface heating. Convective support will be relatively minimal, so expect impacts from any scattered showers to be minimal. Behind this The only chance for more widespread active weather would be Saturday night into Sunday, when another larger system enters the Midwest to western Great Lakes. However, as of this forecast cycle this system tracks south of the area, which would keep much of the convective potential to our south and may limit how much rain we ultimately see. Still, will be something to keep an eye on if you have plans to travel towards Illinois over the weekend. && .AVIATION...for 18Z TAF Issuance Issued at 1232 PM CDT Tue Jun 16 2026 Numerous showers with scattered thunderstorms will prevail through the afternoon as sfc low crosses WI. Greatest instability is over east-central WI and this is where hail the size of quarters and wind gusts over 30 kts could occur this afternoon. Mainly VFR cigs are expected, though pockets of MVFR are possible, especially over central WI. Showers end by this evening, with the next round of showers and possible thunder arriving late Wednesday morning. && .GRB WATCHES/WARNINGS/ADVISORIES... None. && DISCUSSION.....Uhlmann AVIATION.......JLA
Hazardous weather outlook, Jun 16, 12:45 PM CDT, 1 hour 32 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Green Bay WI 1245 PM CDT Tue Jun 16 2026 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-171745- 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- 1245 PM CDT Tue Jun 16 2026 This Hazardous Weather Outlook is for north-central and northeast Wisconsin. .DAY ONE...This Afternoon and Tonight Scattered storms are expected into early this evening. Most storms will produce small hail and gusty winds. An isolated storm could produce hail the size of quarters. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Thunderstorms return Wednesday afternoon and evening. A few stronger storms will be possible at times, mainly across central to east-central Wisconsin. Hail and damaging winds are possible, along with heavy rainfall. .SPOTTER INFORMATION STATEMENT... Spotter are asked to report any hail that occurs with thunderstorms this afternoon. LMZ521-522-541>543-171745- The Bay of Green Bay south of a line from Cedar River MI to Rock Island Passage-Lake Michigan from Washington Island to Sheboygan- 1245 PM CDT Tue Jun 16 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 into early this evening. Any thunderstorms will pose a hazard to mariners. .DAYS TWO THROUGH SEVEN...Wednesday through Monday There are chances of thunderstorms again on Wednesday and at times over the weekend. Any thunderstorms will pose a hazard to mariners. JLA
In the hours before
Special weather statement, Jun 16, 1:08 PM CDT, 1 hour 9 minutes before
Special Weather Statement
National Weather Service Green Bay WI
108 PM CDT Tue Jun 16 2026
WIZ022-040-161900-
Kewaunee WI-Door WI-
108 PM CDT Tue Jun 16 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL DOOR AND NORTHERN
KEWAUNEE COUNTIES UNTIL 2 PM CDT...
At 108 PM CDT, Doppler radar was tracking a strong thunderstorm 5
miles southwest of Algoma, or 8 miles north of Kewaunee, moving
northeast at 15 mph.
HAZARD...Wind gusts up to 40 mph and nickel 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...
Kewaunee around 110 PM CDT.
Other locations impacted by this strong thunderstorm include Euren,
Alaska, Slovan, Casco, Lincoln, Rostok, Rio Creek, Rankin,
Gregorville and Kolberg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4468 8759 4480 8747 4469 8732 4466 8732
4466 8733 4454 8742 4451 8743 4444 8754
4458 8769
TIME...MOT...LOC 1808Z 224DEG 11KT 4457 8754
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH
KSLocal storm report, Jun 16, 1:18 PM CDT, 59 minutes before
Preliminary Local Storm Report
National Weather Service Green Bay WI
118 PM CDT Tue Jun 16 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0112 PM Hail 2 SE Stephensville 44.34N 88.56W
06/16/2026 M0.50 Inch Outagamie WI Public
Report from mPING: Half-inch (0.50 in.).
&&Local storm report, Jun 16, 1:21 PM CDT, 56 minutes before
Preliminary Local Storm Report
National Weather Service Green Bay WI
121 PM CDT Tue Jun 16 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0119 PM Hail 2 W Appleton 44.26N 88.45W
06/16/2026 E0.50 Inch Outagamie WI Public
Report from mPING: Half-inch (0.50 in.).
&&Local storm report, Jun 16, 1:31 PM CDT, 46 minutes before
Preliminary Local Storm Report
National Weather Service Green Bay WI
131 PM CDT Tue Jun 16 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0116 PM Hail Wittman Field 43.98N 88.56W
06/16/2026 M0.50 Inch Winnebago WI Public
0122 PM Hail 2 WNW Oshkosh 44.02N 88.59W
06/16/2026 M1.00 Inch Winnebago WI Public
0123 PM Hail 2 NE Oshkosh 44.03N 88.53W
06/16/2026 M0.50 Inch Winnebago WI Public
Report from mPING: Half-inch (0.50 in.).
0124 PM Hail 1 E Wittman Field 43.98N 88.53W
06/16/2026 E0.50 Inch Winnebago WI Public
Report from mPING: Half-inch (0.50 in.).
0128 PM Hail 1 SE Wittman Field 43.97N 88.54W
06/16/2026 E0.75 Inch Winnebago WI Public
Report from mPING: Dime (0.75 in.).
&&Special weather statement, Jun 16, 2:02 PM CDT, 15 minutes before
Special Weather Statement
National Weather Service Green Bay WI
202 PM CDT Tue Jun 16 2026
WIZ040-162000-
Kewaunee WI-
202 PM CDT Tue Jun 16 2026
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL KEWAUNEE COUNTY THROUGH
300 PM CDT...
At 202 PM CDT, Doppler radar was tracking a strong thunderstorm near
Kewaunee, moving north at 10 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...
Kewaunee around 210 PM CDT.
Other locations impacted by this storm include Krok, Rostok, Slovan,
Ellisville, Alaska, Birchwood, Casco, Scarboro, and East Krok.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4438 8751 4441 8774 4458 8764 4457 8743
TIME...MOT...LOC 1902Z 198DEG 7KT 4448 8760
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
EckbergLocal storm report, Jun 16, 2:16 PM CDT, 1 minute before
Preliminary Local Storm Report
National Weather Service Green Bay WI
216 PM CDT Tue Jun 16 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0201 PM Hail 3 WSW Howard 44.53N 88.12W
06/16/2026 M0.50 Inch Brown WI Trained Spotter
&&The office that day
Everything else NWS Green Bay, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 10:45 AM CDT | Special Weather Statement | GRB | Marathon, Portage | 75 min |
| Jun 16, 11:28 AM CDT | Severe Thunderstorm Warning | GRB | Portage | 36 min |
| Jun 16, 11:55 AM CDT | Special Weather Statement | GRB | Shawano | 35 min |
| Jun 16, 12:14 PM CDT | Severe Thunderstorm Warning | GRB | Outagamie, Shawano, Waupaca | 44 min |
| Jun 16, 12:25 PM CDT | Special Weather Statement | GRB | Kewaunee | 35 min |
| Jun 16, 12:52 PM CDT | Severe Thunderstorm Warning | GRB | Outagamie, Waupaca | 20 min |
| Jun 16, 1:06 PM CDT | Special Weather Statement | GRB | Brown, Calumet, Outagamie | 54 min |
| Jun 16, 1:08 PM CDT | Special Weather Statement | GRB | Kewaunee | 52 min |
| Jun 16, 1:39 PM CDT | Special Marine Warning | GRB | 66 min | |
| Jun 16, 1:54 PM CDT | Severe Thunderstorm Warning | GRB | Brown, Outagamie | 50 min |
| Jun 16, 1:56 PM CDT | Special Marine Warning | GRB | 59 min | |
| Jun 16, 2:02 PM CDT | Areal Flood Advisory | GRB | Kewaunee | 3 hr |
| Jun 16, 2:02 PM CDT | Special Weather Statement | GRB | Kewaunee | 58 min |
| Jun 16, 2:34 PM CDT | Areal Flood Advisory | GRB | Brown, Outagamie | 78 min |
| Jun 16, 3:42 PM CDT | Small Craft Advisory | GRB | 36 hr | |
| Jun 16, 3:43 PM CDT | Beach Hazards Statement | GRB | Door, Kewaunee, Manitowoc | 36 hr |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2026Every severe thunderstorm warning in 2026
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.