Ice Storm Risk in Idaho
All Idaho counties ranked by FEMA National Risk Index ice storm score
Ice Storm risk — freezing rain that coats surfaces in heavy, damaging ice — is rated for 44 of 44 Idaho counties in FEMA's National Risk Index. Kootenai County carries the state's highest ice storm score at 84.1, with $634K in expected annual ice storm losses.
1 Idaho county is rated High or Very High for ice storm, and expected annual losses from ice storm total roughly $2M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Ice Storm
| # | County | Ice Storm Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Kootenai County | High | 0.25 / yr | $634K | |
| 2 | Ada County | Medium | 0.10 / yr | $706K | |
| 3 | Canyon County | Medium | 0.09 / yr | $323K | |
| 4 | Bonner County | Medium | 0.11 / yr | $223K | |
| 5 | Twin Falls County | Low | 0.05 / yr | $128K | |
| 6 | Shoshone County | Low | 0.17 / yr | $94K | |
| 7 | Benewah County | Low | 0.27 / yr | $48K | |
| 8 | Jerome County | Low | 0.07 / yr | $34K | |
| 9 | Elmore County | Low | 0.08 / yr | $42K | |
| 10 | Bonneville County | Very Low | 0.01 / yr | $35K | |
| 11 | Gooding County | Very Low | 0.10 / yr | $23K | |
| 12 | Gem County | Very Low | 0.04 / yr | $22K | |
| 13 | Owyhee County | Very Low | 0.05 / yr | $10K | |
| 14 | Bannock County | Very Low | 0.01 / yr | $20K | |
| 15 | Bingham County | Very Low | 0.01 / yr | $13K | |
| 16 | Madison County | Very Low | 0.01 / yr | $13K | |
| 17 | Latah County | Very Low | 0.04 / yr | $14K | |
| 18 | Washington County | Very Low | 0.01 / yr | $8K | |
| 19 | Cassia County | Very Low | 0.01 / yr | $9K | |
| 20 | Boise County | Very Low | 0.04 / yr | $8K | |
| 21 | Lincoln County | Very Low | 0.05 / yr | $6K | |
| 22 | Minidoka County | Very Low | 0.01 / yr | $6K | |
| 23 | Payette County | Very Low | 0.02 / yr | $7K | |
| 24 | Idaho County | Very Low | 0.02 / yr | $4K | |
| 25 | Jefferson County | Very Low | 0.01 / yr | $8K | |
| 26 | Blaine County | Very Low | 0.02 / yr | $5K | |
| 27 | Valley County | Very Low | 0.01 / yr | $5K | |
| 28 | Fremont County | Very Low | 0.01 / yr | $6K | |
| 29 | Teton County | Very Low | 0.01 / yr | $5K | |
| 30 | Clearwater County | Very Low | 0.03 / yr | $3K | |
| 31 | Custer County | Very Low | 0.01 / yr | $2K | |
| 32 | Nez Perce County | Very Low | 0.01 / yr | $5K | |
| 33 | Lemhi County | Very Low | 0.01 / yr | $3K | |
| 34 | Power County | Very Low | 0.01 / yr | $3K | |
| 35 | Franklin County | Very Low | 0.01 / yr | $3K | |
| 36 | Caribou County | Very Low | 0.01 / yr | $2K | |
| 37 | Bear Lake County | Very Low | 0.01 / yr | $2K | |
| 38 | Butte County | Very Low | 0.01 / yr | $1K | |
| 39 | Adams County | Very Low | 0.01 / yr | $860 | |
| 40 | Oneida County | Very Low | 0.01 / yr | $1K | |
| 41 | Lewis County | Very Low | 0.01 / yr | $419 | |
| 42 | Boundary County | Very Low | 0.01 / yr | $336 | |
| 43 | Camas County | Very Low | 0.04 / yr | $398 | |
| 44 | Clark County | Very Low | 0.01 / yr | $336 |
44 Idaho counties with measurable ice storm risk. See the national ice storm ranking or all Idaho counties by overall risk.
Frequently Asked Questions
Which Idaho county has the highest ice storm risk?
Kootenai County has the highest FEMA ice storm risk score in Idaho at 84.1 (High), with $634K in expected annual losses and about 0.25 events per year.
How many Idaho counties face significant ice storm risk?
44 Idaho counties record measurable ice storm risk in FEMA's National Risk Index; 1 of them are rated High or Very High.