NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Boise, ID
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
No tropical storm or hurricane has passed within 75 miles of Boise, Idaho since records began in 1851. Since 1950, 21 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 21
- EF3 or stronger
- 0
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
no recorded deaths
What the records show for Boise
The highest rating among the 21 tornadoes within 25 miles is F1, reached 4 times; the most recent, on June 19, 1991, came within 22 miles. Of the 21, 4 had paths within 5 miles of the city centre, and 11 have come since 2000. August has had the most tornadoes, 6. The most recent tornado was on May 26, 2023. Boise has more tornadoes within 25 miles than 77% of the 90 Idaho cities on this site. Hail has been reported within 10 miles 31 times since 1967, with stones up to 1.5 inches (ping pong ball size). Boise has more hail reports within 10 miles than 95% of the 90 Idaho cities.
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Tornadoes within 25 miles of Boise
By decade
- 2020s1
- 2000s10
- 1990s5
- 1980s2
- 1960s1
- 1950s2
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 19, 1991 | F1 | 22 mi | 0.1 mi | 0 / 0 |
| Oct 26, 1984 | F1 | 7 mi | 0.3 mi | 0 / 0 |
| Mar 21, 1984 | F1 | 11 mi | 0.1 mi | 0 / 0 |
| Jul 9, 1956 | F1 | 14 mi | 0.1 mi | 0 / 0 |
| May 26, 2023 | EF0 | 13 mi | 0.95 mi | 0 / 0 |
| Aug 25, 2004 | F0 | 23 mi | — | 0 / 0 |
| Apr 6, 2003 | F0 | 16 mi | 1 mi | 0 / 0 |
| Sep 29, 2002 | F0 | 25 mi | 1 mi | 0 / 0 |
| Feb 7, 2002 | F0 | 22 mi | 0.1 mi | 0 / 0 |
| Dec 15, 2000 | F0 | 16 mi | 1 mi | 0 / 0 |
| Aug 3, 2000 | F0 | 11 mi | 0.1 mi | 0 / 0 |
| Aug 3, 2000 | F0 | 3 mi | 0.1 mi | 0 / 0 |
The strongest 12 of 21, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Boise
The Storm Prediction Center has 31 hail reports within 10 miles of Boise since 1967, made on 26 separate days. Of these, 17 were 1 inch across or larger, and none reached 2 inches. The largest size, 1.5 inches (ping pong ball size), was reported on 3 days, most recently August 6, 2009. The most recent report is from April 3, 2024. April and July have the most reports, 7 each.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Boise
The nearest NOAA station with 1991–2020 climate normals is Boise Air Terminal, ID, 3 miles south of Boise at 2,814 feet. July is the warmest, with an average high of 93°F and low of 62°F; December is the coolest, at 39°F and 25°F. May and December are the wettest at 1.5 inches of precipitation on average and July and August the driest at 0.2 inches; the year adds up to 11.5 inches over 38 days with at least a tenth of an inch. Highs reach 90°F on about 55 days a year, almost all from May to September. Lows fall below freezing on about 108 nights a year. Snowfall averages 17.6 inches a year, most of it in December. That 11.5 inches is more than at 26 of the 66 Idaho stations used on this site (39%). Meridian, 9 miles west, has its own station (Nampa Sugar Factory, ID): 11.2 inches a year, 0.3 less than here, and the same July average high, 93°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 39 | 26 | 1.4 | 5 | 5.3 |
| Feb | 46 | 29 | 1.0 | 4 | 3.3 |
| Mar | 56 | 35 | 1.3 | 5 | 1.2 |
| Apr | 62 | 40 | 1.2 | 4 | 0.1 |
| May | 72 | 48 | 1.5 | 4 | 0.0 |
| Jun | 81 | 54 | 0.8 | 2 | 0.0 |
| Jul | 93 | 62 | 0.2 | 1 | 0.0 |
| Aug | 91 | 61 | 0.2 | 0 | 0.0 |
| Sep | 80 | 53 | 0.4 | 1 | 0.0 |
| Oct | 65 | 42 | 0.8 | 2 | 0.1 |
| Nov | 49 | 32 | 1.2 | 4 | 2.0 |
| Dec | 39 | 25 | 1.5 | 5 | 5.6 |
| Year | 64 | 42 | 11.5 | 38 | 17.6 |
Averages for 1991–2020 at Boise Air Terminal, ID (2,814 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Boise
Since 1996, the National Weather Service has logged 86 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Boise: 60 thunderstorm wind reports, 16 heavy rain events, 5 flash floods and 5 floods. They killed 0 people and injured 74, and the NWS estimated $4.0 million in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on September 5, 2019. Of the 62 Idaho cities on this site with a flash flood on record, 49 have had fewer than Boise.
August 21, 2010: thunderstorm wind 7 miles from the centre of Boise — 70 injured.
July 25, 2002: thunderstorm wind 7 miles from the centre of Boise — 4 injured.
May 1, 2017: flood 7 miles from the centre of Boise — $2.0 million damage.
NWS: “The Boise River remained in flood during the entire month of May due to planned release from Lucky Peak dam. Regulated flows were above flood stage for 101 days resulting in extensive damage to the Greenbelt and Nature Trail paths.”
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Flood insurance policyholders in Boise's 7 ZIP codes have filed 94 claims with the National Flood Insurance Program since 1979, and were paid $210,000 for buildings and contents, in the dollars of each year. The year with the most claims was 2017, with 15. 1% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 19 Idaho cities on this site with 10 or more claims, 17 have fewer than Boise.
Ada County, which includes Boise, has been named in 6 federal disaster or emergency declarations since 1964, 4 of them major disasters (by incident: 2 biological emergencies, 2 floods, 1 fire, 1 hurricane). The latest major disaster declaration was Covid-19 Pandemic, on April 9, 2020. FEMA's National Risk Index gives Ada County a Relatively Moderate rating for natural hazard risk overall; by hazard: Relatively High for strong wind and lightning; Relatively Moderate for inland flooding and heat waves; Relatively Low for tornadoes and hail. It models the county's expected loss from all 18 hazards it covers at $115.6 million a year, the highest of 44 Idaho counties; of the hazards above, the largest share, $63.0 million (54%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Boise
- Meridian, ID9 mi
- Eagle, ID9 mi
- Kuna, ID13 mi
- Star, ID14 mi
- Nampa, ID17 mi
- Middleton, ID19 mi
- Caldwell, ID23 mi
- Emmett, ID23 mi
- Melba, ID24 mi
- Marsing, ID30 mi
- Wilder, ID33 mi
- Homedale, ID35 mi
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