The logo of the Storm Prediction Center.

The Storm Prediction Center (SPC) is a US government agency that is part of the National Centers for Environmental Prediction (NCEP), operating under the control of the National Weather Service (NWS), which in turn is part of the National Oceanic and Atmospheric Administration (NOAA) of the United States Department of Commerce (DoC).

June 16

• 1942 – A tornado struck southern Brazil, destroying many buildings including two hotels and a church. Reports from the day after indicate that more than 20 people were killed and hundreds were injured.
• 1992 – An F5 tornado moved through Chandler, Minnesota, destroying 75 homes and damaging more than 90 other structures. One person was killed and 40 were injured.
• 2014 – A strong supercell spawned a complex family of six tornadoes in northeastern Nebraska, four of which were rated EF4. The most destructive of these destroyed about half of Pilger and killed one person. A simultaneous EF4 tornado east of the town killed another person. Video of these twin tornadoes was widely shown in news media and online.

June 17

• 1944 – A significant tornado outbreak affected the Upper Midwest. An F5 tornado obliterated farms near Wilmot, South Dakota, killing eight people. An F4 tornado destroyed more farms near Henry and Florence, South Dakota and passed through Long Lake, killing three people. An F3 tornado destroyed 20 buildings and unroofed a school in Bath, South Dakota, leaving two dead. The tornadoes from this outbreak are only listed as windstorms in official records, even though well-defined funnels were spotted.
• 1946 – An F4 tornado touched down in Melvindale, Michigan and crossed the Detroit River, killing at least 15 people as it moved through Windsor and Tecumseh, Ontario.
• 1978 – An F1 tornado moved across Pomona Lake in Osage County, Kansas and capsized the tour boat Whippoorwill, drowning 16 of the 58 people on board and injuring 3 others. This was the deadliest tornado on record to receive a "weak" (F0 or F1) rating on the Fujita scale.

June 18

• 1939 – An F4 tornado moved through the Minneapolis–Saint Paul area, destroying 40 homes in Anoka, Maple Grove, and Champlin, killing nine people and injuring 222. Some homes were swept away. Four people died in a car that was thrown 300 yards.
• 2001 – An F3 tornado damaged or destroyed 240 buildings in Siren, Wisconsin, killing two people and inuring 16.

• ...that the 2013 Moore tornado that struck Moore and Newcastle, Oklahoma, is the most recent EF5 tornado?
• ...that the 2021 South Moravia tornado, an IF4 tornado with winds between 207–260 mph (333–418 km/h), was the strongest tornado to hit the Czech Republic in modern history?