EF scale and F scale: what changed in the ratings in 2007
The Enhanced Fujita scale replaced the Fujita scale on February 1, 2007. Comparing the 17 years before with the years since, 2.9% of rated tornadoes reached F3 or stronger before and 2.7% reached EF3 or stronger after.
Ratings either side of the change
Rows match each number on the two scales; the scales rate damage with different guides, so the columns are not strictly equal.
Share of rated tornadoes since 2007 by EF rating, percent
| 0 | 62.8 | 51.1 | 33,329 |
| 1 | 26.3 | 36.7 | 25,179 |
| 2 | 7.9 | 9.3 | 10,079 |
| 3 | 2.4 | 2.3 | 2,669 |
| 4 | 0.5 | 0.4 | 596 |
| 5 | 0.0 | 0.0 | 60 |