Rankings · Weather

Highest severe-storm days by state

Reported severe-storm days / yr.

This measure has no better end. The order describes the states, it does not rank them — see the other direction.

Twenty-year annual average of county days with a reported NOAA severe-storm event. The 2006–2025 calculation includes county-coded Thunderstorm Wind, Hail, or Tornado records; a county-day is counted once even when the storm produces several reports. This is a history of reported significant convective weather, not a count of every thunderstorm, warning, lightning strike, or future risk.

1. 1Arizona13 days
2. 2South Carolina11 days
3. 3Oklahoma10 days
4. 4Illinois9 days
5. 5Kansas9 days
6. 6Alabama8 days
7. 7Maryland8 days
8. 8North Carolina8 days
9. 9Tennessee8 days
10. 10South Dakota8 days
11. 11Missouri8 days
12. 12Nebraska7 days
13. 13Pennsylvania7 days
14. 14Texas7 days
15. 15Arkansas7 days
16. 16Mississippi7 days
17. 17Colorado7 days
18. 18Ohio7 days
19. 19Delaware7 days
20. 20Florida7 days
21. 21Wyoming7 days
22. 22Nevada6 days
23. 23Georgia6 days
24. 24Massachusetts6 days
25. 25North Dakota6 days
26. 26District of Columbia6 days
27. 27Iowa6 days
28. 28Virginia6 days
29. 29Indiana6 days
30. 30Kentucky6 days
31. 31Michigan5 days
32. 32New Hampshire5 days
33. 33Minnesota5 days
34. 34Louisiana5 days
35. 35New Jersey5 days
36. 36Wisconsin5 days
37. 37West Virginia5 days
38. 38Utah4 days
39. 39Maine4 days
40. 40New Mexico4 days
41. 41New York4 days
42. 42Montana4 days
43. 43Vermont4 days
44. 44Rhode Island3 days
45. 45Idaho2 days
46. 46California2 days
47. 47Oregon1 days
48. 48Hawaii1 days
49. 49Washington1 days
50. 50Alaska0 days
51. 51Connecticut0 days

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Source: NOAA NCEI Storm Events Database. · How this is built