Inconvenient weather fact: The frequency of US violent tornadoes fell to a record low in 2017 of only 15 in the strong/violent categories of F3-F5, which was the fewest annual number in more than 60 yrs. going back to 1954 when NOAA started collecting annual US tornado data.

Inconvenient weather fact: The frequency of US violent tornadoes fell to a record low in 2017 of only 15 in the strong/violent categories of F3-F5, which was the fewest annual number in more than 60 yrs. going back to 1954 when NOAA started collecting annual US tornado data. pic.twitter.com/ux7RpzSNQH

— Mark J. Perry (@Mark_J_Perry) May 17, 2018