Ice Storm Risk in Washington
All Washington 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 39 of 39 Washington counties in FEMA's National Risk Index. Snohomish County carries the state's highest ice storm score at 98.0, with $4M in expected annual ice storm losses.
11 Washington counties are rated High or Very High for ice storm, and expected annual losses from ice storm total roughly $18M 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 | Snohomish County | Very High | 0.45 / yr | $4M | |
| 2 | Whatcom County | Very High | 0.53 / yr | $3M | |
| 3 | Spokane County | Very High | 0.33 / yr | $3M | |
| 4 | Skagit County | High | 0.45 / yr | $1M | |
| 5 | King County | High | 0.77 / yr | $1M | |
| 6 | Clark County | High | 1.86 / yr | $1M | |
| 7 | Walla Walla County | High | 0.54 / yr | $830K | |
| 8 | Benton County | High | 0.23 / yr | $929K | |
| 9 | Grays Harbor County | High | 0.56 / yr | $604K | |
| 10 | Pierce County | High | 0.64 / yr | $727K | |
| 11 | Klickitat County | High | 0.21 / yr | $406K | |
| 12 | Franklin County | Medium | 0.28 / yr | $381K | |
| 13 | Island County | Medium | 0.34 / yr | $314K | |
| 14 | Jefferson County | Medium | 0.19 / yr | $189K | |
| 15 | Thurston County | Medium | 0.63 / yr | $210K | |
| 16 | Clallam County | Low | 0.12 / yr | $88K | |
| 17 | Yakima County | Low | 0.07 / yr | $80K | |
| 18 | Kitsap County | Low | 0.58 / yr | $104K | |
| 19 | Stevens County | Low | 0.09 / yr | $67K | |
| 20 | Columbia County | Low | 0.38 / yr | $56K | |
| 21 | Lincoln County | Low | 0.24 / yr | $41K | |
| 22 | Whitman County | Low | 0.19 / yr | $60K | |
| 23 | Lewis County | Low | 0.51 / yr | $37K | |
| 24 | Pend Oreille County | Low | 0.07 / yr | $39K | |
| 25 | Cowlitz County | Low | 0.33 / yr | $35K | |
| 26 | Skamania County | Low | 0.64 / yr | $38K | |
| 27 | Mason County | Very Low | 0.31 / yr | $19K | |
| 28 | Kittitas County | Very Low | 0.19 / yr | $20K | |
| 29 | Chelan County | Very Low | 0.07 / yr | $17K | |
| 30 | Adams County | Very Low | 0.11 / yr | $15K | |
| 31 | San Juan County | Very Low | 0.04 / yr | $13K | |
| 32 | Pacific County | Very Low | 0.76 / yr | $12K | |
| 33 | Wahkiakum County | Very Low | 0.84 / yr | $9K | |
| 34 | Garfield County | Very Low | 0.22 / yr | $13K | |
| 35 | Grant County | Very Low | 0.01 / yr | $7K | |
| 36 | Asotin County | Very Low | 0.15 / yr | $6K | |
| 37 | Okanogan County | Very Low | 0.01 / yr | $3K | |
| 38 | Ferry County | Very Low | 0.02 / yr | $2K | |
| 39 | Douglas County | Very Low | 0.01 / yr | $541 |
39 Washington counties with measurable ice storm risk. See the national ice storm ranking or all Washington counties by overall risk.
Frequently Asked Questions
Which Washington county has the highest ice storm risk?
Snohomish County has the highest FEMA ice storm risk score in Washington at 98.0 (Very High), with $4M in expected annual losses and about 0.45 events per year.
How many Washington counties face significant ice storm risk?
39 Washington counties record measurable ice storm risk in FEMA's National Risk Index; 11 of them are rated High or Very High.