Alert archive / Wisconsin / Tornado Warnings in 2026
Tornado Warning 80, NWS Milwaukee, WI
NWS Milwaukee, WI issued this tornado warning at Aug 18, 2026, 4:12 PM CDT for Green Lake County, Marquette County, Wisconsin. It was in force for 48 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
- Aug 18, 2026, 4:12 PM CDT (21:12 UTC)
- Expired
- Aug 18, 2026, 5:00 PM CDT
- In force
- 48 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.5 in
Counties Green Lake County, WI, Marquette County, WI
The radar
The Green Bay radar (KGRB), 98 km from the middle of the area, began a volume at 21:11 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 18, 2:48 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 9.2 hours before the alert went out and 377 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
- 1301 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 956 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted.
575
WFUS53 KMKX 182112
TORMKX
WIC047-077-182200-
/O.NEW.KMKX.TO.W.0080.260818T2112Z-260818T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
412 PM CDT Tue Aug 18 2026
The National Weather Service in Milwaukee/Sullivan has issued a
* Tornado Warning for...
Northern Green Lake County in south central Wisconsin...
Northeastern Marquette County in south central Wisconsin...
* Until 500 PM CDT.
* At 412 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Wautoma, moving southeast at 35 mph.
HAZARD...Tornado and ping pong ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Berlin and Princeton around 425 PM CDT.
Green Lake around 435 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Neshkoro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4398 8889 4371 8889 4398 8939 4399 8914
TIME...MOT...LOC 2112Z 295DEG 32KT 4403 8931
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
$$
SHEPPARD1 follow-up statement
244
WWUS53 KMKX 182152
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
452 PM CDT Tue Aug 18 2026
WIC077-182201-
/O.CAN.KMKX.TO.W.0080.000000T0000Z-260818T2200Z/
Marquette WI-
452 PM CDT Tue Aug 18 2026
...THE TORNADO WARNING FOR NORTHEASTERN MARQUETTE COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central Wisconsin.
&&
LAT...LON 4398 8889 4371 8889 4383 8910
TIME...MOT...LOC 2151Z 301DEG 31KT 4384 8893
$$
WIC047-182200-
/O.CON.KMKX.TO.W.0080.000000T0000Z-260818T2200Z/
Green Lake WI-
452 PM CDT Tue Aug 18 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
NORTHEASTERN GREEN LAKE COUNTY...
At 451 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Green Lake, or near Ripon, moving southeast at 35
mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
northeastern Green Lake County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4398 8889 4371 8889 4383 8910
TIME...MOT...LOC 2151Z 301DEG 31KT 4384 8893
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
SHEPPARDThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 2:44 PM CDT | Special Weather Statement | MKX | Dodge | 61 min |
| Aug 18, 3:57 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Sauk | 78 min |
| Aug 18, 3:59 PM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 76 min |
| Aug 18, 4:11 PM CDT | Special Marine Warning | MKX | 2 hr | |
| Aug 18, 4:48 PM CDT | Tornado Warning | MKX | Columbia, Sauk | 42 min |
| Aug 18, 4:52 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Sheboygan | 38 min |
| Aug 18, 4:56 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac | 49 min |
| Aug 18, 5:07 PM CDT | Areal Flood Advisory | MKX | Green Lake, Marquette | 3 hr |
| Aug 18, 5:08 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Sauk | 52 min |
| Aug 18, 5:16 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 33 min |
| Aug 18, 5:27 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac, Sheboygan, Washington | 63 min |
| Aug 18, 5:42 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Dodge, Jefferson | 63 min |
| Aug 18, 5:45 PM CDT | Tornado Warning | MKX | Columbia, Dane, Dodge | 18 min |
| Aug 18, 5:54 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Washington | 36 min |
| Aug 18, 6:23 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Dodge, Jefferson, Milwaukee, Ozaukee, Washington and 1 more | 67 min |
| Aug 18, 6:28 PM CDT | Special Marine Warning | MKX | 2 hr | |
| Aug 18, 6:33 PM CDT | Tornado Warning | MKX | Washington, Waukesha | 42 min |
| Aug 18, 6:42 PM CDT | Tornado Warning | MKX | Waukesha | 33 min |
| Aug 18, 6:51 PM CDT | Tornado Warning | MKX | Milwaukee | 23 min |
| Aug 18, 6:54 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Racine, Waukesha | 51 min |
Nearby
Tornado Warnings in Wisconsin, 2026Every tornado warning in 2026Tornadoes 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.