NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Mason City, IA
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
No tropical storm or hurricane has passed within 75 miles of Mason City, Iowa since records began in 1851. Since 1950, 113 tornadoes have touched down within 25 miles, 12 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 113
- EF3 or stronger
- 12
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
20 deaths in all
Tornadoes within 25 miles of Mason City
By decade
- 2020s22
- 2010s10
- 2000s17
- 1990s22(1 EF3+)
- 1980s13
- 1970s9(2 EF3+)
- 1960s14(7 EF3+)
- 1950s6(2 EF3+)
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| May 15, 1968 | F5 | 20 mi | 62.1 mi | 13 / 462 |
| Oct 14, 1966 | F5 | 23 mi | 9.7 mi | 6 / 172 |
| Apr 30, 1967 | F4 | 10 mi | 13.3 mi | 0 / 0 |
| Apr 30, 1967 | F4 | 21 mi | 7.6 mi | 0 / 1 |
| May 5, 1965 | F4 | 21 mi | 41.6 mi | 0 / 11 |
| May 10, 1953 | F4 | 14 mi | 26.6 mi | 0 / 3 |
| May 20, 1953 | F3 | 23 mi | 116.1 mi | 1 / 0 |
| Jun 18, 1994 | F3 | 21 mi | 6 mi | 0 / 0 |
| May 28, 1974 | F3 | 12 mi | 3.8 mi | 0 / 3 |
| Jul 12, 1971 | F3 | 15 mi | 15.4 mi | 0 / 0 |
| Apr 30, 1967 | F3 | 12 mi | 17.2 mi | 0 / 0 |
| Apr 30, 1967 | F3 | 5 mi | 7.7 mi | 0 / 0 |
The strongest 12 of 113, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
How to read this page
A storm is listed when the centre of its track passed within 75 miles of Mason City while it was at least a tropical storm, which is the reach of damaging wind and rain for a typical hurricane. Being on the list does not mean the city took a direct hit; the "closest" column says how near the centre came. Tornadoes are counted when any part of the path came within 25 miles.
Tornado records before the 1990s are thinner, because weak tornadoes in open country often went unreported before Doppler radar and mobile phones. A rise in the decade counts is mostly better reporting, not a change in the weather.
Tracks come from the National Hurricane Center's HURDAT2 database, tornadoes from the Storm Prediction Center's database. Both are the official federal records and both are revised as old storms are re-analysed.