Urgent: Tornado Warnings Wisconsin Expire After Severe Storms

Image Source: WISN

Tornado warnings Wisconsin residents monitored Tuesday evening have expired, but the severe weather left thousands of people without electricity across southeastern Wisconsin. WISN reported that all severe thunderstorm warnings and watches had been canceled by 9 p.m. on Aug. 18, 2026.

The storms moved through communities during the late afternoon and evening, bringing the potential for damaging wind gusts, hail, heavy rain and isolated tornadoes. Although the overall severe weather risk remained low at Level 1 out of 5, several storms prompted urgent warnings across the region.

Critical Tornado Warnings Wisconsin Residents Watched

The National Weather Service issued multiple warnings as storms developed and traveled eastward. A tornado warning was issued for southwestern Dodge County at 5:45 p.m. The storm was located about seven miles south of Rio and 10 miles west of Columbus, Wisconsin, moving east at approximately 40 mph.

That warning followed several severe thunderstorm alerts in the area. Forecasters cited wind gusts of up to 60 mph, hail and heavy rainfall as the primary threats. Earlier warnings included parts of Fond du Lac, Sheboygan, Dodge, Jefferson, Washington and Waukesha counties.

At 6:34 p.m., a tornado warning was issued for Washington and Waukesha counties. A separate tornado warning followed for Milwaukee County at 6:51 p.m. and remained in effect until 7:30 p.m. The Dodge County tornado warning expired at 6:05 p.m., while all tornado warnings had been canceled by 7:15 p.m.

Severe Thunderstorm Watch Expanded Across the Region

The severe weather situation continued to evolve throughout the evening. At 6:16 p.m., the severe thunderstorm watch was expanded to include Milwaukee and Racine counties. By 7:46 p.m., a watch remained in effect for Racine, Kenosha and Walworth counties, while other warnings and watches had been canceled.

A new severe thunderstorm warning affecting Milwaukee, Racine and Waukesha counties was issued at 6:55 p.m. and was scheduled to remain in effect until 7:45 p.m. The alert came as storms continued moving through the Milwaukee metropolitan area.

Forecasters initially said the main risks were gusty winds, small hail and heavy rain. Some individual warnings identified larger hail and wind gusts near 60 mph. Residents were urged to remain aware of changing conditions and to seek shelter immediately if a tornado warning was issued for their location.

Power Outages Spread Across Southeastern Wisconsin

In addition to the severe weather threat, storm-related power outages became a major concern Tuesday night. WISN reported the following outage totals at 8:46 p.m.:

• Milwaukee County: 22,827 outages
• Waukesha County: 12,178 outages
• Washington County: 2,477 outages

The outage numbers changed during the evening as the storms moved across the area. At 7:25 p.m., Milwaukee County had 18,220 reported outages. Earlier, Waukesha County had 9,542 outages, while Washington County had 2,474.

The outages affected residents, businesses and traffic signals in several communities. People without electricity were advised to avoid downed power lines, use caution around storm debris and follow information from local utility providers. Anyone using a generator should operate it outdoors and away from doors and windows to prevent carbon monoxide poisoning.

All Warnings Finally Expired by 9 p.m.

By 9 p.m., all severe thunderstorm warnings and watches had expired. The end of the alerts reduced the immediate tornado threat, but residents still needed to use caution because flooding, debris and scattered outages could remain after the storms passed.

Weather conditions can change quickly during summer storm systems. Even when a warning expires, strong winds may leave trees weakened, roads blocked or electrical equipment damaged. Drivers should slow down near standing water and never cross a flooded roadway.

Residents who experienced damage were encouraged to document conditions safely and report hazards to local authorities or utility companies. People should also keep phones charged when possible and maintain access to emergency alerts during the recovery period.

What Wisconsin Residents Should Remember

The Tuesday storm system served as a reminder that a low overall risk does not eliminate the possibility of dangerous weather. Tornadoes can develop quickly, and severe thunderstorm warnings may be issued with limited notice.

• Move indoors when a tornado warning is issued.
• Take shelter in a basement or small interior room on the lowest floor.
• Stay away from windows and exterior walls.
• Remain indoors until officials announce that the danger has passed.
• Keep away from downed wires and report them to the proper utility provider.

As per WISN, the immediate warnings had ended by Tuesday night, but the large number of outages meant the effects of the storms continued for thousands of people across Milwaukee, Waukesha and Washington counties.

Frequently Asked Questions

Are the tornado warnings in Wisconsin still active?

No. WISN reported that all tornado warnings, severe thunderstorm warnings and watches had expired by 9 p.m. Tuesday night.

Which counties had the most power outages?

Milwaukee County had the most reported outages, with 22,827 at 8:46 p.m. Waukesha County reported 12,178, and Washington County reported 2,477.

What were the main storm threats?

The main threats included damaging wind gusts, hail, heavy rain and isolated tornadoes. Some warnings cited winds near 60 mph.

What should people do after a tornado warning expires?

Residents should check for hazards, avoid downed power lines, watch for flooding and continue monitoring local emergency information in case conditions change.