Idaho strong wind risk
Ada County has the highest strong wind risk in Idaho, scoring 91.8 out of 100 — rated "Relatively High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Ada County | 91.8 | Relatively High | 0 |
| 2 | Canyon County | 68.4 | Relatively Moderate | 0 |
| 3 | Elmore County | 49.1 | Relatively Low | 0 |
| 4 | Bonneville County | 43.9 | Relatively Low | 0 |
| 5 | Kootenai County | 38.6 | Relatively Low | 0 |
| 6 | Twin Falls County | 36.7 | Relatively Low | 0 |
| 7 | Bingham County | 30.6 | Relatively Low | 0 |
| 8 | Gem County | 24.5 | Relatively Low | 0 |
| 9 | Boise County | 23.6 | Relatively Low | 0 |
| 10 | Cassia County | 23.2 | Relatively Low | 0 |
| 11 | Washington County | 21.9 | Relatively Low | 0 |
| 12 | Blaine County | 21.7 | Relatively Low | 0 |
| 13 | Bonner County | 20.4 | Relatively Low | 0 |
| 14 | Jerome County | 19.3 | Relatively Low | 0 |
| 15 | Madison County | 19.1 | Relatively Low | 0 |
| 16 | Latah County | 18.9 | Relatively Low | 0 |
| 17 | Minidoka County | 17.9 | Relatively Low | 0 |
| 18 | Custer County | 15.7 | Very Low | 0 |
| 19 | Gooding County | 13.8 | Very Low | 0 |
| 20 | Payette County | 13.8 | Very Low | 0 |
| 21 | Bannock County | 12.9 | Very Low | 0 |
| 22 | Jefferson County | 12.4 | Very Low | 0 |
| 23 | Owyhee County | 10.9 | Very Low | 0 |
| 24 | Franklin County | 10.4 | Very Low | 0 |
| 25 | Lincoln County | 10.4 | Very Low | 0 |
| 26 | Bear Lake County | 10.1 | Very Low | 0 |
| 27 | Power County | 8.6 | Very Low | 0 |
| 28 | Nez Perce County | 8.1 | Very Low | 0 |
| 29 | Fremont County | 8 | Very Low | 0 |
| 30 | Benewah County | 7.6 | Very Low | 0 |
| 31 | Butte County | 7.5 | Very Low | 0 |
| 32 | Valley County | 7 | Very Low | 0 |
| 33 | Idaho County | 6.6 | Very Low | 0 |
| 34 | Oneida County | 6.2 | Very Low | 0 |
| 35 | Caribou County | 5.5 | Very Low | 0 |
| 36 | Shoshone County | 5.5 | Very Low | 0 |
| 37 | Boundary County | 5.2 | Very Low | 0 |
| 38 | Teton County | 4.9 | Very Low | 0 |
| 39 | Lemhi County | 4.3 | Very Low | 0 |
| 40 | Clearwater County | 4.2 | Very Low | 0 |
| 41 | Adams County | 2.8 | Very Low | 0 |
| 42 | Lewis County | 2.7 | Very Low | 0 |
| 43 | Camas County | 2.1 | Very Low | 0 |
| 44 | Clark County | 1.8 | Very Low | 0 |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Strong Wind risk nationally:
Other hazard risks in Idaho:
Frequently asked questions
What is the highest strong wind risk county in Idaho?
Ada County, ID has the highest strong wind risk in Idaho, with a FEMA National Risk Index score of 91.8 out of 100 (rated "Relatively High").
What causes strong wind risk in Idaho?
Strong wind risk covers non-convective, non-tropical sustained high winds — including derechos and general high-wind events, but excluding tornado and hurricane winds. High scores appear in mountain passes, coastal headlands, and open plains where topography amplifies wind speeds. Damage concentrates on utility infrastructure, trees, and lightweight structures.