Ice Storm Risk in South Dakota
All South Dakota 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 66 of 66 South Dakota counties in FEMA's National Risk Index. Minnehaha County carries the state's highest ice storm score at 99.1, with $5M in expected annual ice storm losses.
6 South Dakota counties are rated High or Very High for ice storm, and expected annual losses from ice storm total roughly $20M 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 | Minnehaha County | Very High | 1.11 / yr | $5M | |
| 2 | Codington County | High | 0.54 / yr | $2M | |
| 3 | Moody County | High | 0.88 / yr | $1M | |
| 4 | Lincoln County | High | 1.09 / yr | $2M | |
| 5 | Pennington County | High | 0.12 / yr | $525K | |
| 6 | Yankton County | High | 0.87 / yr | $409K | |
| 7 | Aurora County | Medium | 0.46 / yr | $539K | |
| 8 | Brown County | Medium | 0.37 / yr | $534K | |
| 9 | Davison County | Medium | 0.66 / yr | $458K | |
| 10 | Brookings County | Medium | 0.58 / yr | $594K | |
| 11 | Beadle County | Medium | 0.48 / yr | $415K | |
| 12 | Lake County | Medium | 0.75 / yr | $390K | |
| 13 | Roberts County | Medium | 0.53 / yr | $253K | |
| 14 | Day County | Medium | 0.51 / yr | $243K | |
| 15 | Charles Mix County | Medium | 0.60 / yr | $261K | |
| 16 | Jackson County | Medium | 0.27 / yr | $152K | |
| 17 | Hutchinson County | Medium | 0.74 / yr | $302K | |
| 18 | McCook County | Medium | 0.70 / yr | $325K | |
| 19 | Hanson County | Medium | 0.62 / yr | $142K | |
| 20 | Union County | Medium | 0.98 / yr | $272K | |
| 21 | Turner County | Medium | 0.97 / yr | $244K | |
| 22 | Dewey County | Medium | 0.55 / yr | $94K | |
| 23 | Deuel County | Medium | 0.64 / yr | $242K | |
| 24 | Kingsbury County | Medium | 0.54 / yr | $255K | |
| 25 | Brule County | Medium | 0.32 / yr | $147K | |
| 26 | Jerauld County | Medium | 0.49 / yr | $142K | |
| 27 | Grant County | Medium | 0.57 / yr | $230K | |
| 28 | Bon Homme County | Medium | 0.82 / yr | $215K | |
| 29 | Douglas County | Medium | 0.62 / yr | $179K | |
| 30 | Clay County | Medium | 0.95 / yr | $231K | |
| 31 | Hamlin County | Medium | 0.52 / yr | $203K | |
| 32 | Spink County | Low | 0.45 / yr | $189K | |
| 33 | Gregory County | Low | 0.39 / yr | $146K | |
| 34 | Todd County | Low | 0.25 / yr | $65K | |
| 35 | Hughes County | Low | 0.45 / yr | $179K | |
| 36 | Meade County | Low | 0.26 / yr | $154K | |
| 37 | Tripp County | Low | 0.32 / yr | $77K | |
| 38 | Marshall County | Low | 0.35 / yr | $108K | |
| 39 | Sanborn County | Low | 0.48 / yr | $142K | |
| 40 | Clark County | Low | 0.49 / yr | $130K | |
| 41 | Edmunds County | Low | 0.51 / yr | $127K | |
| 42 | Miner County | Low | 0.56 / yr | $161K | |
| 43 | Faulk County | Low | 0.51 / yr | $48K | |
| 44 | McPherson County | Low | 0.51 / yr | $49K | |
| 45 | Ziebach County | Low | 0.48 / yr | $34K | |
| 46 | Perkins County | Low | 0.55 / yr | $71K | |
| 47 | Lyman County | Low | 0.38 / yr | $32K | |
| 48 | Corson County | Low | 0.66 / yr | $28K | |
| 49 | Hand County | Low | 0.49 / yr | $55K | |
| 50 | Haakon County | Low | 0.44 / yr | $35K | |
| 51 | Mellette County | Low | 0.31 / yr | $23K | |
| 52 | Hyde County | Low | 0.51 / yr | $28K | |
| 53 | Stanley County | Low | 0.45 / yr | $50K | |
| 54 | Buffalo County | Low | 0.38 / yr | $27K | |
| 55 | Jones County | Low | 0.45 / yr | $48K | |
| 56 | Potter County | Low | 0.55 / yr | $39K | |
| 57 | Harding County | Low | 0.43 / yr | $41K | |
| 58 | Walworth County | Very Low | 0.57 / yr | $22K | |
| 59 | Bennett County | Very Low | 0.16 / yr | $14K | |
| 60 | Sully County | Very Low | 0.45 / yr | $34K | |
| 61 | Campbell County | Very Low | 0.66 / yr | $27K | |
| 62 | Butte County | Very Low | 0.18 / yr | $18K | |
| 63 | Fall River County | Very Low | 0.02 / yr | $5K | |
| 64 | Oglala Lakota County | Very Low | 0.01 / yr | $3K | |
| 65 | Lawrence County | Very Low | 0.01 / yr | $4K | |
| 66 | Custer County | Very Low | 0.01 / yr | $2K |
66 South Dakota counties with measurable ice storm risk. See the national ice storm ranking or all South Dakota counties by overall risk.
Frequently Asked Questions
Which South Dakota county has the highest ice storm risk?
Minnehaha County has the highest FEMA ice storm risk score in South Dakota at 99.1 (Very High), with $5M in expected annual losses and about 1.11 events per year.
How many South Dakota counties face significant ice storm risk?
66 South Dakota counties record measurable ice storm risk in FEMA's National Risk Index; 6 of them are rated High or Very High.