Avalanche Risk in Wyoming
All Wyoming counties ranked by FEMA National Risk Index avalanche score
Avalanche risk — fast-moving snow and debris sliding down steep mountain slopes — is rated for 21 of 23 Wyoming counties in FEMA's National Risk Index. Teton County carries the state's highest avalanche score at 100.0, with $23M in expected annual avalanche losses.
5 Wyoming counties are rated High or Very High for avalanche, and expected annual losses from avalanche total roughly $38M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Avalanche
| # | County | Avalanche Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Teton County | Very High | 2.07 / yr | $23M | |
| 2 | Lincoln County | Very High | 1.47 / yr | $8M | |
| 3 | Carbon County | High | 0.13 / yr | $2M | |
| 4 | Sublette County | High | 1.13 / yr | $2M | |
| 5 | Park County | High | 0.13 / yr | $1M | |
| 6 | Albany County | Medium | 0.07 / yr | $913K | |
| 7 | Natrona County | Medium | 0.10 / yr | $594K | |
| 8 | Fremont County | Medium | 1.00 / yr | $392K | |
| 9 | Sheridan County | Medium | 0.03 / yr | $457K | |
| 10 | Hot Springs County | Low | 0.07 / yr | $30K | |
| 11 | Big Horn County | Very Low | 0.01 / yr | $110 | |
| 12 | Johnson County | Very Low | 0.01 / yr | $68 | |
| 13 | Washakie County | Very Low | 0.01 / yr | $22 | |
| 14 | Sweetwater County | Very Low | 0.01 / yr | $14 | |
| 15 | Converse County | Very Low | 0.01 / yr | $6 | |
| 16 | Platte County | Very Low | 0.01 / yr | $1 | |
| 17 | Crook County | Very Low | 0.01 / yr | $1 | |
| 18 | Weston County | Very Low | 0.01 / yr | $0 | |
| 19 | Laramie County | Very Low | 0.01 / yr | $0 | |
| 20 | Goshen County | Very Low | 0.01 / yr | $0 | |
| 21 | Uinta County | Very Low | 0.01 / yr | $0 |
21 Wyoming counties with measurable avalanche risk. See the national avalanche ranking or all Wyoming counties by overall risk.
Frequently Asked Questions
Which Wyoming county has the highest avalanche risk?
Teton County has the highest FEMA avalanche risk score in Wyoming at 100.0 (Very High), with $23M in expected annual losses and about 2.07 events per year.
How many Wyoming counties face significant avalanche risk?
21 Wyoming counties record measurable avalanche risk in FEMA's National Risk Index; 5 of them are rated High or Very High.