NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Nampa, 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 Nampa, Idaho since records began in 1851. Since 1950, 25 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 25
- 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 Nampa
The highest rating among the 25 tornadoes within 25 miles is F1, reached 5 times; the most recent, on May 17, 1996, came within 24 miles. Of the 25, 2 had paths within 5 miles of the city centre, and 13 have come since 2000. August has had the most tornadoes, 7. The most recent tornado was on May 26, 2023. Nampa has more tornadoes within 25 miles than 87% of the 90 Idaho cities on this site. Hail has been reported within 10 miles 15 times since 1956, with stones up to 2 inches (hen egg size). Nampa has more hail reports within 10 miles than 63% of the 90 Idaho cities.
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Tornadoes within 25 miles of Nampa
By decade
- 2020s2
- 2000s11
- 1990s6
- 1980s3
- 1960s1
- 1950s2
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| May 17, 1996 | F1 | 24 mi | 0.3 mi | 0 / 0 |
| Jun 19, 1991 | F1 | 22 mi | 0.1 mi | 0 / 0 |
| Oct 26, 1984 | F1 | 10 mi | 0.3 mi | 0 / 0 |
| Mar 21, 1984 | F1 | 11 mi | 0.1 mi | 0 / 0 |
| Jul 9, 1956 | F1 | 10 mi | 0.1 mi | 0 / 0 |
| May 26, 2023 | EF0 | 11 mi | 0.95 mi | 0 / 0 |
| May 27, 2022 | EF0 | 11 mi | 3.77 mi | 0 / 0 |
| Aug 25, 2004 | F0 | 22 mi | — | 0 / 0 |
| Aug 25, 2004 | F0 | 13 mi | — | 0 / 0 |
| Apr 6, 2003 | F0 | 1 mi | 1 mi | 0 / 0 |
| Sep 29, 2002 | F0 | 21 mi | 1 mi | 0 / 0 |
| Feb 7, 2002 | F0 | 22 mi | 0.1 mi | 0 / 0 |
The strongest 12 of 25, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Nampa
The Storm Prediction Center has 15 hail reports within 10 miles of Nampa since 1956, made on 14 separate days. Of these, 8 were 1 inch across or larger, and one reached 2 inches. The largest, 2 inches (hen egg size), fell on May 25, 2018. The most recent report is from April 3, 2024. April has the most reports, 5.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Nampa
The nearest NOAA station with 1991–2020 climate normals is Nampa Sugar Factory, ID, 3 miles north of Nampa at 2,470 feet. July is the warmest, with an average high of 93°F and low of 57°F; January is the coolest, at 40°F and 23°F. Highs reach 90°F on about 59 days a year, almost all from May to September. Lows fall below freezing on about 132 nights a year. Snowfall averages 9.7 inches a year, most of it in December. That 11.2 inches is more than at 24 of the 66 Idaho stations used on this site (36%). Caldwell, 10 miles northwest, has its own station (Deer Flat Dam, ID): 10.2 inches a year, 1.0 less than here, and a July average high of 90°F against 93°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 40 | 23 | 1.4 | 5 | 3.4 |
| Feb | 47 | 26 | 1.0 | 4 | 1.4 |
| Mar | 57 | 32 | 1.3 | 4 | 0.2 |
| Apr | 65 | 36 | 1.1 | 4 | 0.0 |
| May | 74 | 44 | 1.4 | 4 | 0.0 |
| Jun | 83 | 51 | 0.7 | 2 | 0.0 |
| Jul | 93 | 57 | 0.3 | 1 | 0.0 |
| Aug | 92 | 56 | 0.2 | 1 | 0.0 |
| Sep | 81 | 47 | 0.4 | 1 | 0.0 |
| Oct | 67 | 37 | 0.8 | 3 | 0.0 |
| Nov | 51 | 28 | 1.2 | 4 | 0.5 |
| Dec | 40 | 23 | 1.4 | 5 | 4.2 |
| Year | 66 | 38 | 11.2 | 37 | 9.7 |
Averages for 1991–2020 at Nampa Sugar Factory, ID (2,470 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 Nampa
Since 1996, the National Weather Service has logged 33 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Nampa: 24 thunderstorm wind reports, 5 floods, 3 flash floods and 1 heavy rain event. They killed 0 people and injured 6, and the NWS estimated $1.1 million in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on June 7, 1996.
July 13, 2002: thunderstorm wind 2 miles from the centre of Nampa — 4 injured.
October 19, 2019: thunderstorm wind 10 miles from the centre of Nampa — 2 injured.
April 1, 2017: flood 9 miles from the centre of Nampa — $500,000 damage.
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
Canyon County, which includes Nampa, has been named in 4 federal disaster or emergency declarations since 2005, 2 of them major disasters (by incident: 2 biological emergencies, 1 flood, 1 hurricane). The latest major disaster declaration was Covid-19 Pandemic, on April 9, 2020. FEMA's National Risk Index gives Canyon County a Relatively Low rating for natural hazard risk overall; by hazard: Relatively High for lightning; Relatively Moderate for inland flooding, strong wind and heat waves; Relatively Low for hail; Very Low for tornadoes. It models the county's expected loss from all 18 hazards it covers at $36.1 million a year, the 4th highest of 44 Idaho counties; of the hazards above, the largest share, $23.8 million (66%), 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 Nampa
- Meridian, ID9 mi
- Caldwell, ID10 mi
- Star, ID10 mi
- Middleton, ID11 mi
- Kuna, ID11 mi
- Melba, ID13 mi
- Marsing, ID14 mi
- Eagle, ID14 mi
- Boise, ID17 mi
- Wilder, ID18 mi
- Homedale, ID19 mi
- Emmett, ID23 mi
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