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Double Tornadoes Aren't Particularly Rare, But Yesterday's Was ...
Twin Tornadoes: Not As Rare As You Might Think
Ten Amazing Facts About Tornadoes, Explained | Smithsonian
Multiple-vortex tornado - Wikipedia
Tornado records - Wikipedia
Are sister tornadoes real? What to know about 'Twisters' …
10 Tornado Myths Busted | Weather.com - The Weather Channel
How and Why Do Violent Tornadoes Form? | Smithsonian
What is a multi-vortex tornado? Why the EF3 storm that hit New …
How tornado season is changing - Vox