According to data from NOAA's Storm Prediction Center, during June, there were 124 preliminary tornado reports. This was about 51 percent of the 1991-2010 average of 243 tornadoes for the month of June. Tornadoes were reported on 25 of the 30 days during the month. Many of the days reported single digit tornado counts.
The first notable tornado days were June 7 and 8, as a combined 32 preliminary tornadoes were reported. These tornadoes were scattered across eastern Colorado, southern Nebraska, eastern Kansas and western Missouri on June 7 and impacted central Indiana and southern Ohio on June 8. During this two-day period most of these tornadoes were rated as either EF-1 or EF-0, but there were also three EF-2 tornadoes. One of the EF-2 tornadoes occurred near Tipp City and South Bloomingville, Ohio, caused damage to homes, vehicles and businesses including a large distribution warehouse and other infrastructure. There were no fatalities.
The next notable tornado day occurred on June 15 where one dozen tornadoes tracked through southern and eastern Wisconsin. One this day, there were nine EF-1 and three EF-2 tornadoes that caused damage to homes, vehicles, farms, outbuildings and vegetation. One of the EF-2 tornadoes passed near Wyeville and Oakdale uprooting thousands of trees in Monroe and Juneau counties and ripped through Necedah National Wildlife Refuge in central Wisconsin. There were no fatalities.
June 23 and 24 was another two-day period that produced a combined 15 tornadoes that impacted central Kansas, eastern North Dakota and northern Minnesota. Most of these tornadoes were EF-0 tornadoes across Kansas that quickly dissipated causing little damage across rural areas. On June 24 there was one EF-1 tornado in Mahnomen County, Minnesota and an EF-2 tornado in Becker and Wadena counties of Minnesota. Each of these tornadoes caused scattered damage to homes, vehicles, farms, vegetation and transmission lines. There were no reported injuries or fatalities.
Did You Know?
Final monthly tornado counts are typically less than the preliminary count. This can be due to some phenomena being inaccurately reported as tornadic activity or a single tornado being reported multiple times. Tornado accounts are reported to the local National Weather Service forecast offices who are responsible for going into the field and verifying each tornado reported. This process often takes several months to complete. Once all reports have been investigated, the final count is published by the Storm Prediction Center (SPC).
The Tornado Monthly Climate Reports are written using the preliminary numbers because the final data is not available at the time of production. Historically, for every 100 preliminary tornado reports, at least 65 tornadoes are confirmed. An error bar is depicted on the tornado count graphic representing this uncertainty in the preliminary tornado count.
The following U.S. studies performed by SPC meteorologists offer deeper context and discussion regarding the frequency and distribution of tornado intensity climatologies:
- Edwards, R., H. E. Brooks, and H. Cohn, 2021: Changes in tornado climatology accompanying the Enhanced Fujita scale. J. Appl. Meteor. Climatol., 60, 1465-1482, DOI: 10.1175/JAMC-D-21-0058.1.
- Mccarthy, Daniel & Schaefer, Joseph. (2004). Tornado trends over the past thirty years. paper presented at 14th Conference on Applied Meteorology.