Colorado ice storm risk
Logan County has the highest ice storm risk in Colorado, scoring 80.7 out of 100 — rated "Relatively Moderate" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Logan County | 80.7 | Relatively Moderate |
| 2 | Weld County | 78.4 | Relatively Moderate |
| 3 | Boulder County | 72.9 | Relatively Moderate |
| 4 | Jefferson County | 71.8 | Relatively Moderate |
| 5 | El Paso County | 64.5 | Relatively Moderate |
| 6 | Adams County | 60.3 | Relatively Moderate |
| 7 | Larimer County | 50.9 | Relatively Low |
| 8 | Morgan County | 46.8 | Relatively Low |
| 9 | Douglas County | 42.6 | Relatively Low |
| 10 | Broomfield County | 40.8 | Relatively Low |
| 11 | Yuma County | 35.7 | Relatively Low |
| 12 | Mesa County | 33.2 | Relatively Low |
| 13 | Washington County | 32.8 | Relatively Low |
| 14 | Pueblo County | 32.4 | Relatively Low |
| 15 | Phillips County | 30.1 | Relatively Low |
| 16 | Eagle County | 28 | Relatively Low |
| 17 | Baca County | 24.5 | Very Low |
| 18 | La Plata County | 21.2 | Very Low |
| 19 | Elbert County | 19.5 | Very Low |
| 20 | Summit County | 19.5 | Very Low |
| 21 | Alamosa County | 18.7 | Very Low |
| 22 | Garfield County | 18.3 | Very Low |
| 23 | Routt County | 18.2 | Very Low |
| 24 | Fremont County | 17.5 | Very Low |
| 25 | Kit Carson County | 17.3 | Very Low |
| 26 | Montrose County | 16.9 | Very Low |
| 27 | Grand County | 16 | Very Low |
| 28 | Delta County | 15.1 | Very Low |
| 29 | Montezuma County | 15 | Very Low |
| 30 | Rio Grande County | 13.6 | Very Low |
| 31 | Prowers County | 12.7 | Very Low |
| 32 | Denver County | 12.1 | Very Low |
| 33 | Arapahoe County | 11.4 | Very Low |
| 34 | Archuleta County | 11.1 | Very Low |
| 35 | Clear Creek County | 11 | Very Low |
| 36 | Pitkin County | 10.6 | Very Low |
| 37 | Sedgwick County | 10.5 | Very Low |
| 38 | Chaffee County | 10.2 | Very Low |
| 39 | Lincoln County | 9.6 | Very Low |
| 40 | Gunnison County | 9.4 | Very Low |
| 41 | Otero County | 9.1 | Very Low |
| 42 | Las Animas County | 8.8 | Very Low |
| 43 | Teller County | 8.5 | Very Low |
| 44 | Moffat County | 7.8 | Very Low |
| 45 | Gilpin County | 7.5 | Very Low |
| 46 | Park County | 7.4 | Very Low |
| 47 | Conejos County | 7.2 | Very Low |
| 48 | Huerfano County | 6.5 | Very Low |
| 49 | Rio Blanco County | 6.3 | Very Low |
| 50 | Saguache County | 5.7 | Very Low |
| 51 | San Miguel County | 5.3 | Very Low |
| 52 | Costilla County | 5 | Very Low |
| 53 | Cheyenne County | 3.9 | Very Low |
| 54 | Dolores County | 3.9 | Very Low |
| 55 | Lake County | 3.4 | Very Low |
| 56 | Kiowa County | 3.2 | Very Low |
| 57 | Ouray County | 3.1 | Very Low |
| 58 | Crowley County | 2.9 | Very Low |
| 59 | Custer County | 2.9 | Very Low |
| 60 | Jackson County | 2.9 | Very Low |
| 61 | Bent County | 1.7 | Very Low |
| 62 | Mineral County | 1.2 | Very Low |
| 63 | Hinsdale County | 0.9 | Very Low |
| 64 | San Juan County | 0.4 | Very Low |
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.
Ice Storm risk nationally:
Other hazard risks in Colorado:
Frequently asked questions
What is the highest ice storm risk county in Colorado?
Logan County, CO has the highest ice storm risk in Colorado, with a FEMA National Risk Index score of 80.7 out of 100 (rated "Relatively Moderate").
What causes ice storm risk in Colorado?
Ice storm risk covers damaging freezing rain and sleet accumulation, which collapses power lines, trees, and structures. The highest-risk counties cluster in a band from eastern Texas and Arkansas through the Carolinas and New England, where warm Gulf moisture overruns cold arctic air most frequently. Ice storms cause catastrophic and long-lasting power outages. Ice storm and sleet events are reported at forecast-zone level in NOAA Storm Events and are not included in county-level counts.