⚠️ Severe Thunderstorm Warning – Columbia, WI; Dane, WI; Dodge, WI; Jefferson, WI – Tuesday, August 18, 2026

Severe Thunderstorm Warning issued August 18 at 5:42PM CDT until August 18 at 6:45PM CDT by NWS Milwaukee/Sullivan WI

Details

SVRMKX

The National Weather Service in Milwaukee/Sullivan has issued a

* Severe Thunderstorm Warning for…
Southeastern Columbia County in south central Wisconsin…
Dane County in south central Wisconsin…
Northwestern Jefferson County in southeastern Wisconsin…
Southwestern Dodge County in southeastern Wisconsin…

* Until 645 PM CDT.

* At 541 PM CDT, severe thunderstorms were located along a line
extending from Rio to Deforest to near Cross Plains, moving
southeast at 35 mph.

HAZARD…60 mph wind gusts and penny size hail.

SOURCE…Radar indicated.

IMPACT…Expect damage to roofs, siding, and trees.

* Locations impacted include…
Madison, Sun Prairie, Fitchburg, Watertown, Middleton, Beaver Dam,
Stoughton, Waunakee, Verona, Oregon, McFarland, Monona, Windsor,
Lake Mills, Columbus, Marshall, Waterloo, Juneau, Deforest, and
Cottage Grove.

Other landmarks included are the following Location Wisconsin State
Capitol.

Instructions

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a
building.

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.