Michigan ice storm risk
Oakland County has the highest ice storm risk in Michigan, scoring 99.4 out of 100 — rated "Very High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Oakland County | 99.4 | Very High |
| 2 | Wayne County | 99 | Very High |
| 3 | Macomb County | 98.2 | Very High |
| 4 | Washtenaw County | 90.4 | Relatively High |
| 5 | Genesee County | 89.6 | Relatively High |
| 6 | St. Clair County | 86.4 | Relatively High |
| 7 | Monroe County | 84.8 | Relatively High |
| 8 | Van Buren County | 84.1 | Relatively High |
| 9 | Ingham County | 84 | Relatively High |
| 10 | Kent County | 83.6 | Relatively High |
| 11 | Livingston County | 80 | Relatively Moderate |
| 12 | Ottawa County | 77.5 | Relatively Moderate |
| 13 | Jackson County | 77.3 | Relatively Moderate |
| 14 | Lenawee County | 76.9 | Relatively Moderate |
| 15 | Saginaw County | 75.6 | Relatively Moderate |
| 16 | Kalamazoo County | 73.7 | Relatively Moderate |
| 17 | Eaton County | 72.6 | Relatively Moderate |
| 18 | Muskegon County | 72.6 | Relatively Moderate |
| 19 | Lapeer County | 72.4 | Relatively Moderate |
| 20 | Ionia County | 72 | Relatively Moderate |
| 21 | Calhoun County | 71.6 | Relatively Moderate |
| 22 | Sanilac County | 71.4 | Relatively Moderate |
| 23 | Barry County | 69.6 | Relatively Moderate |
| 24 | Tuscola County | 69.4 | Relatively Moderate |
| 25 | Shiawassee County | 68 | Relatively Moderate |
| 26 | Allegan County | 66.7 | Relatively Moderate |
| 27 | Isabella County | 62.7 | Relatively Moderate |
| 28 | Bay County | 62.6 | Relatively Moderate |
| 29 | Montcalm County | 62.2 | Relatively Moderate |
| 30 | Hillsdale County | 61.2 | Relatively Moderate |
| 31 | Branch County | 60.4 | Relatively Moderate |
| 32 | Clinton County | 57.7 | Relatively Low |
| 33 | Midland County | 57.1 | Relatively Low |
| 34 | Newaygo County | 52.3 | Relatively Low |
| 35 | Gratiot County | 52 | Relatively Low |
| 36 | Mecosta County | 51.7 | Relatively Low |
| 37 | St. Joseph County | 50.2 | Relatively Low |
| 38 | Huron County | 49.3 | Relatively Low |
| 39 | Berrien County | 47.9 | Relatively Low |
| 40 | Oceana County | 45.9 | Relatively Low |
| 41 | Marquette County | 45.2 | Relatively Low |
| 42 | Cass County | 42.4 | Relatively Low |
| 43 | Clare County | 42.2 | Relatively Low |
| 44 | Gladwin County | 35.1 | Relatively Low |
| 45 | Menominee County | 33.8 | Relatively Low |
| 46 | Osceola County | 30.4 | Relatively Low |
| 47 | Gogebic County | 28.9 | Relatively Low |
| 48 | Mason County | 28.4 | Relatively Low |
| 49 | Arenac County | 26.7 | Very Low |
| 50 | Iosco County | 26.2 | Very Low |
| 51 | Roscommon County | 23.6 | Very Low |
| 52 | Ogemaw County | 23.1 | Very Low |
| 53 | Wexford County | 22.3 | Very Low |
| 54 | Lake County | 21.8 | Very Low |
| 55 | Dickinson County | 20 | Very Low |
| 56 | Manistee County | 17.1 | Very Low |
| 57 | Alger County | 16.6 | Very Low |
| 58 | Delta County | 16.1 | Very Low |
| 59 | Alpena County | 15.2 | Very Low |
| 60 | Emmet County | 14.9 | Very Low |
| 61 | Missaukee County | 13.4 | Very Low |
| 62 | Baraga County | 12.6 | Very Low |
| 63 | Charlevoix County | 11.7 | Very Low |
| 64 | Iron County | 11.4 | Very Low |
| 65 | Alcona County | 11.3 | Very Low |
| 66 | Keweenaw County | 10.1 | Very Low |
| 67 | Otsego County | 10 | Very Low |
| 68 | Antrim County | 9.7 | Very Low |
| 69 | Kalkaska County | 9.7 | Very Low |
| 70 | Grand Traverse County | 9.5 | Very Low |
| 71 | Presque Isle County | 9.1 | Very Low |
| 72 | Crawford County | 8.7 | Very Low |
| 73 | Montmorency County | 7.9 | Very Low |
| 74 | Chippewa County | 7.7 | Very Low |
| 75 | Houghton County | 6.9 | Very Low |
| 76 | Cheboygan County | 6.4 | Very Low |
| 77 | Oscoda County | 5.9 | Very Low |
| 78 | Leelanau County | 5.1 | Very Low |
| 79 | Schoolcraft County | 4.5 | Very Low |
| 80 | Benzie County | 3.3 | Very Low |
| 81 | Mackinac County | 3.2 | Very Low |
| 82 | Luce County | 2.4 | Very Low |
| 83 | Ontonagon County | 2.2 | 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 Michigan:
Frequently asked questions
What is the highest ice storm risk county in Michigan?
Oakland County, MI has the highest ice storm risk in Michigan, with a FEMA National Risk Index score of 99.4 out of 100 (rated "Very High").
How many counties in Michigan are rated Very High for ice storm risk?
3 of 83 scored Michigan counties are rated "Very High" for ice storm risk by FEMA's National Risk Index.
What causes ice storm risk in Michigan?
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.