A major tornado outbreak unfolded during a severe weather event that took place across much of the eastern United States on June 11, 2026. The event produced dozens of tornadoes, widespread damaging winds, and large hail from the Plains to New England, including multiple strong tornadoes that caused EF-3 damage in Illinois and Indiana.
The outbreak occurred just one day after the June 10, 2026 derecho, underscoring an exceptionally active severe weather pattern across the central and eastern United States during mid-June. While additional analysis may be required to determine whether portions of the June 11 event meet the formal meteorological definition of a derecho, the widespread corridor of damaging winds and longevity of the storm system approached derecho criteria in some areas.
Setting the Meteorological Stage
The storm system developed in an environment characterized by strong instability, abundant moisture, and favorable wind shear across the Midwest and Great Lakes. The Storm Prediction Center highlighted portions of the region with an Enhanced Risk in its severe weather outlooks. Meteorologists anticipated the development of supercells capable of producing tornadoes, large hail, and damaging winds. Forecasters also outlined a 15% tornado risk, indicating a substantial potential for tornado development. Additionally, the SPC’s newer tornado severity guidance included a Level 2 out of 3 tornado severity designation. This signaled the potential for stronger tornadoes capable of producing significant damage.
As storms evolved during the afternoon and evening, discrete supercells produced numerous tornadoes across Illinois and Indiana before transitioning into a long-lived mesoscale convective system. This evolving storm complex continued eastward overnight, spreading damaging winds across the Midwest, Mid-Atlantic, and Northeast. The SPC’s forecast concerns ultimately proved well-founded as multiple strong tornadoes, including EF-3 tornadoes in Illinois and Indiana, developed during the outbreak.
Major Tornado Outbreak Unfolds Across Multiple States
The June 11 outbreak produced dozens of tornado reports across multiple states, with some of the most significant damage occurring in Illinois and Indiana.
The strongest tornado of the outbreak struck northwestern Indiana near Shelby and Kouts, where National Weather Service survey teams assigned an EF-3 rating with estimated peak winds of 165 mph. The tornado tracked more than 22 miles and was among the strongest tornadoes documented in the United States during 2026.
Another significant tornado occurred near Rome in Woodford County, Illinois, where an EF-3 tornado reached peak winds of 155 mph and expanded to an impressive maximum width of approximately 930 yards.
Additional significant tornadoes included an EF-2 tornado near Griffith, Indiana, which injured at least one person, and another EF-2 tornado in Elkhart County, Indiana. Numerous EF-1 tornadoes were confirmed across Illinois, Wisconsin, and Indiana. These included tornadoes near Rutland, Groveland, Urbana, Ludlow, Ogden, Hoopeston, Bartlett, and Somers.
Several weaker EF-0 and EF-U tornadoes were also documented, including brief touchdowns in Iowa, Michigan, and rural portions of Illinois and Indiana. Many of these occurred over open fields or sparsely populated areas and produced little or no documented damage.
Despite the intensity and geographic extent of the outbreak, no tornado-related fatalities had been confirmed as of the completion of initial surveys. This highlights the important role that modern forecasting, National Weather Service warnings, and public preparedness can play in reducing loss of life during severe weather events. Even still, multiple injuries occurred, underscoring the dangerous nature of the event regardless.
Even before the conclusion of continued survey efforts, the event had clearly met the criteria for a major tornado outbreak. This solidified it as one of the most significant severe weather episodes of 2026.
Widespread Damaging Winds Sweep from the Midwest to the Northeast
Although the tornadoes garnered significant attention, damaging straight-line winds affected a much broader geographic area. Storms raced eastward across the United States during the event.
Measured wind gusts reached or exceeded 80 mph in several locations, including 85 mph near Brook, Indiana; 85 mph near Oak Lawn, Illinois; 82 mph near Watseka, Illinois; 80 mph in Chicago’s Beverly neighborhood; and 80 mph near Lawton, Oklahoma. Additional notable gusts included 78 mph along portions of southern Lake Michigan and 74 mph at Andrews Air Force Base in Maryland.
The storm system produced extensive tree damage, snapped power poles, structural damage, and widespread power outages from the Midwest into the Mid-Atlantic and Northeast. Numerous semitrailers were overturned, grain bins were damaged, and buildings suffered roof damage as the storms progressed eastward.
As the convective system advanced during the evening and overnight hours, severe weather impacts expanded into heavily populated areas of Pennsylvania, Maryland, Virginia, New York, Connecticut, and New Jersey. Wind gusts near 70 mph were recorded in portions of the Washington, D.C., metropolitan area and around New York City. This resulted in additional reports of downed trees, damaged structures, and widespread power outages.
Tragically, multiple fatalities were reported in the Mid-Atlantic region as falling trees struck individuals during the storms. Additional injuries occurred as trees damaged homes, vehicles, and recreational areas.
The breadth and continuity of the wind damage suggest that portions of the event may have approached meteorological derecho criteria. Notably, June 10, 2026, was officially classified as a derecho event. Additional analysis may determine whether portions of the June 11 outbreak also meet derecho classification criteria based on the spatial extent and continuity of severe wind reports.
Regardless, the event generated a remarkable spread of damaging winds spanning several hundred miles across the eastern United States. Many of the most significant wind impacts occurred hundreds of miles east of the outbreak’s strongest tornadoes in the Midwest.
Large Hail Accompanies the Outbreak
Large hail was also widespread during the event, particularly alongside the early supercell development.
Among the largest hail reports were 2.50-inch hail near Wenona, Illinois; 2.50-inch hail near El Reno, Oklahoma; 2.00-inch hail near Pawling, New York; 2.00-inch hail in Hamilton, Iowa; and 2.00-inch hail near Grant City, Missouri.
Golf ball-sized hail or larger was reported across numerous states, damaging vehicles, crops, and property.
Historical Significance of the June 11 Outbreak
The June 11, 2026 outbreak stands out not only for its numerous tornadoes and widespread damaging winds, but also because it occurred immediately after the June 10 derecho. Together, these back-to-back events represent one of the most active severe weather periods of 2026.
For meteorologists, emergency managers, researchers, and other professionals involved in storm-related investigations, the outbreak serves as another reminder that significant severe weather and tornado outbreaks are not solely confined to traditional Tornado Alley. Instead, organized storm systems can produce high-end impacts broadly across the United States anywhere when the atmospheric conditions are right.
As additional National Weather Service surveys are completed, tornado counts, damage ratings, and storm classifications may continue to evolve.
This data came from Storm Reports provided by the Storm Prediction Center: https://www.spc.noaa.gov/
For any questions pertaining to this article, please contact kaitlin@coxweatherservices.com