How Many Tornadoes Per Year?

Annual US Tornado Averages

• Long-term average (1991-2020): ~1,225 tornadoes/year
• Record high year: 2004 with 1,817 tornadoes
• Record low year in modern records: 1988 with 702
• Record deadliest year in modern era: 2011 with 553 deaths

Tornadoes by Decade

The apparent increase from the 1950s to today is largely a detection artifact - Doppler radar (deployed 1990s), storm chasers, cellphones, and better spotter networks now catch tornadoes that would have gone unrecorded in earlier decades. Actual tornado frequency has been relatively stable.

Top States by Annual Average

• Texas: ~140/year (#1 by count)
• Kansas: ~95/year (#1 by density)
• Oklahoma: ~65/year
• Florida: ~55/year
• Nebraska: ~55/year
• Alabama: ~50/year
• Mississippi: ~45/year
• Missouri: ~45/year
• Iowa: ~50/year
• Illinois: ~55/year

Tornadoes by Month (US Average)

• January: ~35
• February: ~40
• March: ~85
• April: ~180
• May: ~270 (peak)
• June: ~240
• July: ~130
• August: ~85
• September: ~55
• October: ~50
• November: ~50
• December: ~30

Global Tornado Counts

The US alone accounts for approximately 75% of all documented tornadoes worldwide.

Are Tornadoes Increasing?

The total US tornado count has been roughly stable over the past 50 years. What HAS changed:

• Detection has improved dramatically - more weak tornadoes are now recorded
• Geography is shifting east - tornado activity is decreasing over the western Great Plains and increasing over Dixie Alley
• Fewer very quiet years - the extremes are shrinking
• Warm-season shift earlier - March activity has increased in the Deep South

Deadliest Tornado Years

• 2011: 553 deaths (Joplin + Super Outbreak)
• 1953: ~519 deaths (Waco, Flint, Worcester, Vicksburg)
• 1936: ~552 deaths (Tupelo, Gainesville)
• 1925: ~794 deaths (Tri-State)
• 1917: ~551 deaths

The pre-radar era (before 1990s) dominates the deadliest years. Modern warnings have dramatically reduced fatalities per tornado - though 2011 was a stunning exception.