TL;DR

Two brief tornadoes touched down in Iowa late Wednesday night into early Thursday morning, July 1-2, 2026. Storm chasers documented both events with video evidence near Stacyville in northern Iowa and Oto in western Iowa. Both tornadoes caused minor tree damage and dissipated quickly. No injuries have been reported.

What Happened Wednesday Night

The National Weather Service confirmed two tornado touchdowns in Iowa overnight, part of a broader severe weather outbreak that produced 292 wind reports and 48 hail reports across 22 states.

The first tornado occurred around 0040 UTC (7:40 PM CDT July 1) approximately one mile south of Stacyville in Mitchell County, northern Iowa. According to the NWS office in La Crosse (ARX), storm chaser video evidence documented a brief tornado that caused minor tree damage before lifting.

The second tornado touched down around 0100 UTC (8:00 PM CDT) about one mile southwest of Oto in Woodbury County, western Iowa. The NWS office in Sioux Falls (FSD) confirmed multiple videos captured the brief touchdown. The location was estimated from video analysis.

Both tornadoes remain rated as "UNK" (unknown intensity) pending further damage surveys. Given the brief nature of both events and the minor damage reported, EF ratings—if assigned—are likely to fall at the lower end of the Enhanced Fujita scale.

The Broader Severe Weather Pattern

Wednesday's tornadoes occurred within a multi-day severe weather episode affecting the northern tier of the United States. The Storm Prediction Center's Day 1 outlook for Thursday, July 2, highlights an Enhanced Risk across portions of the upper Midwest, with scattered to numerous severe storms expected from the northern Plains into the Great Lakes region.

The same atmospheric setup that produced Wednesday night's Iowa tornadoes—a belt of moderate southwesterly flow across the north-central states, combined with a weak surface low near the Black Hills—continues to drive severe weather potential across the region today.

Wind Dominates the Severe Reports

While tornadoes grabbed headlines in Iowa, damaging winds were the dominant hazard across the broader region. The NWS logged 292 wind reports in the 24-hour period ending Thursday morning, with widespread tree and power line damage reported across Wisconsin, Michigan, South Dakota, Iowa, and Alabama.

Wisconsin bore the brunt of the wind damage, with reports spanning from Appleton and Oshkosh through Green Bay and into Door County. The NWS office in Green Bay documented numerous reports of trees and power lines down, including significant damage in Howard where large trees were uprooted.

Michigan's northwest Lower Peninsula also saw substantial wind damage, with trees down from Honor to Elk Rapids and reports of a 16-by-16-foot garage door blown into a structure near Omena.

Hail Strikes Wisconsin Hardest

Forty-eight hail reports were logged across the region, with Wisconsin accounting for the majority. The most significant hail fell in Fond du Lac County, where stones up to 3.25 inches in diameter (slightly larger than a baseball) were reported around 1728 UTC near the intersection of I-41 and US Highway 151.

Other notable hail reports in Wisconsin included:

  • 3.00 inches (baseball-sized) southeast of Fond du Lac
  • 2.50 inches (tennis ball-sized) south of Rosendale and southeast of Fond du Lac
  • 2.25 inches near Plymouth and Elkhart Lake

One resident southeast of Fond du Lac documented 3-inch hail with a ruler in a social media photo, providing precise confirmation of the stone size. The hail swath extended from La Valle and Wisconsin Dells in the west through Fond du Lac and into Sheboygan County along Lake Michigan.

Alabama also reported quarter-sized hail near Baileyton and Powell in the Tennessee Valley, where the NWS outlook had highlighted a wet microburst threat due to extreme instability and high precipitable water values.

Context: A Typical July Severe Weather Day

Wednesday's severe weather activity, while producing two confirmed tornadoes, fits within the typical pattern for early July in the Upper Midwest. Tornadoes during this period are often brief, associated with supercells embedded within larger convective systems, and occur along surface boundaries where wind shear and instability overlap.

The 2-to-292 ratio of tornado reports to wind reports underscores the dominant hazard during summer severe weather events: straight-line winds from microbursts and bow echoes. While tornadoes capture public attention, damaging winds affect far more communities and cause the majority of severe thunderstorm damage during the warm season.

Both Iowa tornadoes occurred during the evening hours, when many residents are home and able to shelter.

Warnings and Alerts

The NWS issued tornado warnings for both events, providing advance notice to residents in the affected areas. Storm chasers in position to document both tornadoes suggest that radar signatures were sufficient to prompt warning decisions, even though the tornadoes themselves were brief.

Third-party weather apps are silenced by Do Not Disturb mode on most smartphones, though Wireless Emergency Alerts (WEA) for tornado warnings still break through on most phones by default. For those in tornado-prone regions, having multiple methods of receiving warnings—including NOAA Weather Radio and phone-based alert systems—remains critical, especially overnight.

Looking Ahead

The Storm Prediction Center's Day 1 outlook for Thursday, July 2, maintains an Enhanced Risk across the upper Midwest, with a Slight Risk extending from the Dakotas into the western Great Lakes and over the southern Appalachians and Tennessee Valley. Scattered to numerous severe storms are expected, with large hail, damaging winds, and isolated tornadoes all possible.

The same surface low and frontal boundary that produced Wednesday's severe weather will continue to provide a focus for storm development through Thursday evening. Residents across the northern Plains, Midwest, and Great Lakes should remain weather-aware and have multiple ways to receive warnings.

VORTEX is a free web app at vortexintel.app that monitors severe weather nationwide. Pro ($4.99/month) places phone calls to your phone when a tornado or flash flood warning is issued for a location you care about — calls can ring through Do Not Disturb once you enable Emergency Bypass for the number, unlike most third-party app notifications.