Utah tornado risk
Salt Lake County has the highest tornado risk in Utah, scoring 71 out of 100 — rated "Relatively Moderate" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Salt Lake County | 71 | Relatively Moderate | 0 |
| 2 | Utah County | 52.6 | Relatively Low | 0 |
| 3 | Davis County | 34.4 | Relatively Low | 1 |
| 4 | Weber County | 32 | Relatively Low | 2 |
| 5 | Cache County | 21.2 | Very Low | 0 |
| 6 | Summit County | 13.6 | Very Low | 0 |
| 7 | Tooele County | 13.6 | Very Low | 0 |
| 8 | Box Elder County | 12.6 | Very Low | 1 |
| 9 | Sanpete County | 12.5 | Very Low | 0 |
| 10 | Carbon County | 12.3 | Very Low | 0 |
| 11 | Wasatch County | 11.8 | Very Low | 1 |
| 12 | Uintah County | 9.6 | Very Low | 0 |
| 13 | Millard County | 8.1 | Very Low | 0 |
| 14 | Juab County | 7.1 | Very Low | 1 |
| 15 | Duchesne County | 7 | Very Low | 1 |
| 16 | Washington County | 6 | Very Low | 1 |
| 17 | Morgan County | 5.6 | Very Low | 0 |
| 18 | San Juan County | 5.4 | Very Low | 6 |
| 19 | Sevier County | 5.2 | Very Low | 0 |
| 20 | Emery County | 5.1 | Very Low | 1 |
| 21 | Grand County | 5 | Very Low | 0 |
| 22 | Iron County | 4 | Very Low | 1 |
| 23 | Rich County | 2.8 | Very Low | 0 |
| 24 | Garfield County | 2.4 | Very Low | 3 |
| 25 | Daggett County | 2.3 | Very Low | 0 |
| 26 | Wayne County | 2.2 | Very Low | 0 |
| 27 | Beaver County | 1.7 | Very Low | 0 |
| 28 | Kane County | 1.6 | Very Low | 0 |
| 29 | Piute County | 1.3 | 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.
Tornado risk nationally:
Other hazard risks in Utah:
Frequently asked questions
What is the highest tornado risk county in Utah?
Salt Lake County, UT has the highest tornado risk in Utah, with a FEMA National Risk Index score of 71 out of 100 (rated "Relatively Moderate").
What causes tornado risk in Utah?
Tornado risk concentrates in the central and southern plains ("Tornado Alley") and the Southeast ("Dixie Alley"), where atmospheric conditions favor supercell thunderstorm development. The highest scores often belong to counties with significant mobile home and manufactured housing stock, which carries disproportionate tornado mortality risk.