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Tornadoes in Idaho

Idaho has recorded 226 tornadoes from 1950 through 2025, about 3.4 per year over the last 30 years. June is the most active month.

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Map data: NWS, OpenFreeMap, OpenStreetMap

Tornadoes per year

96: 496497: 697698: 798799: 199100: 13001301: 201202: 302303: 403404: 504505: 605606: 906907: 307308: 208209: 209210: 210211: 211212: 212213: 613614: 314315: 115116: 216217: 117118: 418419: 519522: 122123: 423424: 124125: 2252
Idaho tornadoes per year, 1996–2025
50s: 1350s1360s: 1660s1670s: 770s780s: 4180s4190s: 6490s6400s: 4900s4910s: 2810s2820s: 820s8
Tornadoes per decade (the 2020s are partial)

When tornadoes happen in Idaho

Jan: 0JanFeb: 6Feb6Mar: 11Mar11Apr: 27Apr27May: 47May47Jun: 54Jun54Jul: 28Jul28Aug: 26Aug26Sep: 16Sep16Oct: 9Oct9Nov: 1Nov1Dec: 1Dec1
Tornadoes by month, 1950–2025
EF0: 154EF0154EF1: 61EF161EF2: 10EF210EF3: 0EF3EF4: 0EF4EF5: 0EF5
Tornadoes by (E)F rating

Ratings before February 2007 use the original Fujita (F) scale; later tornadoes use the Enhanced Fujita (EF) scale. How the EF scale works.

Strongest tornadoes in Idaho

DateRatingCountyPath lengthWidthDeathsInjuries
June 4, 2006F2Adams County12 mi1,760 yd01
May 8, 1962F2Nez Perce County9.1 mi10 yd00
May 31, 1997F2Kootenai County5 mi50 yd00
August 17, 1990F2Power County4 mi100 yd00
April 7, 1978F2Bonneville County1.5 mi73 yd01
September 26, 1959F2Madison County1 mi10 yd00
April 9, 1991F2Bonner County1 mi100 yd00
September 11, 1968F2Minidoka County0.5 mi440 yd00
June 9, 1990F2Jerome County0.2 mi10 yd00
May 18, 1991F2Minidoka County0.2 mi50 yd00

Most recent tornadoes

DateRatingCountyPath lengthWidthDeathsInjuries
October 27, 2025EF0Jefferson County0.1 mi50 yd00
April 1, 2025?Fremont County0.1 mi10 yd00
July 25, 2024EF0Elmore County0.6 mi30 yd00
June 23, 2023EF0Caribou County0.2 mi10 yd00
May 27, 2023EF0Owyhee County5 mi3 yd00
May 26, 2023EF0Ada County1 mi3 yd00
May 26, 2023EF0Cassia County0.2 mi10 yd00
May 27, 2022EF0Owyhee County3.8 mi35 yd00
August 2, 2019EF0Cassia County1 mi10 yd00
June 2, 2019EF0Bingham County1 mi45 yd00

Counties with the most tornadoes

CountyTornadoes since 1950Per 1,000 sq mi
Bingham County2024737344.8
Jefferson County1944981718.5
Power County1731360398.9
Ada County1332005703.4
Twin Falls County1216170655.6
Cassia County1010093530.8
Clark County811752694.3
Butte County89266547.4
Blaine County76872630.8
Bannock County716303956.8
Gooding County621316872.4
Bonneville County68327974.3
Jerome County625986622.1
Minidoka County620528401.6
Madison County633134328.4
Canyon County626473594.5
Elmore County54211382.1
Fremont County56947424.9
Owyhee County51688836.7
Lincoln County48626144.9

About this data

Tornado records come from the NOAA Storm Prediction Center database of confirmed tornadoes, 1950–2025. Tornadoes that crossed state lines are counted in the state where they began. Counts in the early decades are lower partly because many weak tornadoes went unreported before Doppler radar and storm spotter networks.