A tornado outbreak killed 64 people in Pennsylvania 35 years ago. We still know terrifyingly little about the storms.
The 10 Worst States for Tornadoes | Bankrate
Ten memorable and extraordinary tornado events of the 2010s - The Washington Post
The 5 Deadliest US Tornadoes of the 2000's & 2010's - Owlcation
June 2020 was 'tornado drought,' fewest number of US twisters in nearly 70 years, forecasters say | Fox News
TORNADOES OF 2015 - May Madness! - YouTube
5 Deadliest Tornadoes in U.S. History - YouTube
The 5 Deadliest US Tornadoes of the 2000's & 2010's - Owlcation
List of F5 and EF5 tornadoes - Wikipedia
The Five Deadliest F/EF5 Tornadoes on Record | The Weather Channel - Articles from The Weather Channel | weather.com
5 Largest Tornadoes Ever Recorded - Largest.org
Ten memorable and extraordinary tornado events of the 2010s - The Washington Post
Tornado records - Wikipedia
Violent F4/EF-4 and F5/EF-5 Tornadoes in the United States since 1950 - ustornadoes.com
The Five Deadliest F/EF5 Tornadoes on Record | The Weather Channel - Articles from The Weather Channel | weather.com
Tornadoes: The deadliest tornadoes in U.S. history
Ten memorable and extraordinary tornado events of the 2010s - The Washington Post
TOP 10 BEST TORNADOES - YouTube
Ten memorable and extraordinary tornado events of the 2010s - The Washington Post
The 5 Deadliest US Tornadoes of the 2000's & 2010's - Owlcation
Is Tornado Alley shifting to the Southeast U.S.?
The Top 5 U.S. States with the Most Tornadoes
The Five Deadliest F/EF5 Tornadoes on Record | The Weather Channel - Articles from The Weather Channel | weather.com
