Iowa weather has always carried a reputation for extremes, but the afternoon of Nov. 12, 2005, remains one of the most striking examples of how the atmosphere can deliver two very different seasons from one powerful storm system.
While a developing blizzard was beginning to take shape in Nebraska on the cold side of the same storm, Iowa found itself squarely in the warm, unstable sector — and primed for a rare and destructive November tornado outbreak.
A Setup More Like Spring than Late Fall
Leading into the afternoon, a deep low-pressure system surged out of the Rocky Mountains and lifted into the Plains. Strong southerly winds pulled warm, humid air unusually far north for mid-November, with temperatures climbing into the 60s and dew points reaching levels more typical of April or May.
A stout capping inversion kept the atmosphere quiet during the early afternoon, but once the cap weakened, the environment rapidly became supportive of rotating storms. Wind shear — the change in wind direction and speed with height — was strong enough to support long-lived supercells. By 4 p.m., thunderstorms along the Iowa–Nebraska border began producing tornadoes.
By the end of the day, Iowa had recorded 12 tornadoes — including three rated F2 or F3 — the largest November outbreak in state history at the time.
The Stratford F3: Iowa’s Strongest Tornado of the Day
The first significant tornado formed at 4:27 p.m. near Boxholm in Boone County. It quickly strengthened as it tracked northeast, striking multiple farms, crossing the Des Moines River, and then entering Stratford at 4:46 p.m.
The tornado was rated F3, traveling nearly 18 miles and becoming the strongest and longest-lived tornado of the outbreak. Homes were torn apart, vehicles were tossed, and debris was driven into structures with tremendous force — including metal objects embedded into wooden posts. An 84-year-old resident was killed when the tornado hit her home.
The Woodward F2 Forms Almost Simultaneously
While the Stratford tornado was ongoing, a separate supercell roughly 30 miles to the south produced another significant tornado near Minburn in Dallas County at nearly the same time.
This F2 tornado moved directly into Woodward, damaging or destroying homes, shifting structures off foundations, and heavily impacting the southeast side of town. The storm dissipated shortly after it passed through the community, but it left behind a visible and well-documented damage path.
Ames Narrowly Missed as Another F2 Touches Down
Just after 5 p.m., the same supercell that struck Woodward dropped another tornado on the western edge of Ames. It formed near Highway 30, then tracked northeast and narrowly missed the heart of the city as well as the nearby town of Gilbert.
Thousands of football fans preparing for the Iowa State vs. Colorado game at Jack Trice Stadium watched the tornado from a distance. The unusual scene prompted officials to delay kickoff and evacuate the stands — a moment Cyclone fans still refer to as the “Tornado Game.”
A Truly Rare November Event
Before this outbreak, Iowa had not recorded a November tornado in 14 years. Only 23 November tornadoes had occurred in the state since 1950. In a single afternoon in 2005, Iowa saw more than half that number.
Three tornadoes in the outbreak reached F2 or F3 intensity, and at one point, two strong tornadoes were on the ground at the same time — something virtually unheard of in Iowa during November.
The next time the state would see November tornadoes was almost exactly ten years later, during the Veterans Day outbreak in 2015.
Meanwhile, Winter Was Exploding Across the Border
As Iowa dealt with tornadic supercells, Nebraska was being slammed by the same storm — but with an entirely different outcome. On the backside of the low, cold air and intense winds created full blizzard conditions across central and northern Nebraska, shutting down major highways for more than a day.
It became a defining example of how one storm system can produce severe weather and winter weather simultaneously — a collision of seasons that the Midwest knows all too well.
A November Iowa Will Never Forget
The November 2005 outbreak remains one of the most unusual and scientifically fascinating severe weather days in Iowa history. It was a reminder that our state’s severe weather season doesn’t always end with summer — and that even in November, the atmosphere can shift from quiet to dangerous in a matter of minutes.
Tornado just northwest of Ames viewed from KCCI’s SchoolNet camera