Tornado Risk in Michigan
All Michigan counties ranked by FEMA National Risk Index tornado score
Tornado risk — violently rotating columns of air capable of catastrophic local damage — is rated for 83 of 83 Michigan counties in FEMA's National Risk Index. Oakland County carries the state's highest tornado score at 99.7, with $102M in expected annual tornado losses.
11 Michigan counties are rated High or Very High for tornado, and expected annual losses from tornado total roughly $474M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Tornado
| # | County | Tornado Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Oakland County | Very High | 0.39 / yr | $102M | |
| 2 | Wayne County | Very High | 0.28 / yr | $44M | |
| 3 | Macomb County | Very High | 0.21 / yr | $59M | |
| 4 | Genesee County | High | 0.29 / yr | $29M | |
| 5 | Kent County | High | 0.30 / yr | $28M | |
| 6 | Washtenaw County | High | 0.35 / yr | $21M | |
| 7 | Ingham County | High | 0.29 / yr | $16M | |
| 8 | Kalamazoo County | High | 0.26 / yr | $12M | |
| 9 | Jackson County | High | 0.37 / yr | $10M | |
| 10 | Saginaw County | High | 0.34 / yr | $9M | |
| 11 | Livingston County | High | 0.28 / yr | $14M | |
| 12 | Monroe County | Medium | 0.31 / yr | $8M | |
| 13 | Calhoun County | Medium | 0.35 / yr | $7M | |
| 14 | Ottawa County | Medium | 0.37 / yr | $8M | |
| 15 | St. Clair County | Medium | 0.21 / yr | $6M | |
| 16 | Eaton County | Medium | 0.29 / yr | $6M | |
| 17 | Shiawassee County | Medium | 0.25 / yr | $5M | |
| 18 | Lapeer County | Medium | 0.24 / yr | $6M | |
| 19 | Lenawee County | Medium | 0.38 / yr | $5M | |
| 20 | Bay County | Medium | 0.21 / yr | $5M | |
| 21 | Berrien County | Medium | 0.68 / yr | $5M | |
| 22 | Muskegon County | Medium | 0.27 / yr | $4M | |
| 23 | Midland County | Medium | 0.19 / yr | $4M | |
| 24 | Isabella County | Medium | 0.21 / yr | $4M | |
| 25 | Hillsdale County | Medium | 0.31 / yr | $3M | |
| 26 | Ionia County | Medium | 0.25 / yr | $4M | |
| 27 | Van Buren County | Medium | 0.40 / yr | $3M | |
| 28 | Clinton County | Medium | 0.27 / yr | $6M | |
| 29 | Montcalm County | Medium | 0.26 / yr | $3M | |
| 30 | Allegan County | Medium | 0.53 / yr | $4M | |
| 31 | Tuscola County | Medium | 0.32 / yr | $3M | |
| 32 | Branch County | Medium | 0.26 / yr | $2M | |
| 33 | Gratiot County | Medium | 0.25 / yr | $3M | |
| 34 | Barry County | Medium | 0.24 / yr | $3M | |
| 35 | Cass County | Low | 0.21 / yr | $2M | |
| 36 | St. Joseph County | Low | 0.24 / yr | $2M | |
| 37 | Sanilac County | Low | 0.32 / yr | $2M | |
| 38 | Mecosta County | Low | 0.17 / yr | $2M | |
| 39 | Clare County | Low | 0.16 / yr | $1M | |
| 40 | Huron County | Low | 0.36 / yr | $1M | |
| 41 | Gladwin County | Low | 0.15 / yr | $883K | |
| 42 | Roscommon County | Low | 0.13 / yr | $782K | |
| 43 | Newaygo County | Low | 0.19 / yr | $950K | |
| 44 | Grand Traverse County | Low | 0.07 / yr | $1M | |
| 45 | Iosco County | Low | 0.23 / yr | $521K | |
| 46 | Osceola County | Low | 0.14 / yr | $576K | |
| 47 | Ogemaw County | Low | 0.12 / yr | $504K | |
| 48 | Wexford County | Low | 0.09 / yr | $496K | |
| 49 | Arenac County | Low | 0.16 / yr | $460K | |
| 50 | Menominee County | Low | 0.14 / yr | $440K | |
| 51 | Oceana County | Low | 0.21 / yr | $500K | |
| 52 | Emmet County | Low | 0.07 / yr | $481K | |
| 53 | Otsego County | Low | 0.08 / yr | $492K | |
| 54 | Kalkaska County | Low | 0.09 / yr | $377K | |
| 55 | Antrim County | Low | 0.08 / yr | $456K | |
| 56 | Crawford County | Low | 0.10 / yr | $311K | |
| 57 | Cheboygan County | Very Low | 0.09 / yr | $279K | |
| 58 | Dickinson County | Very Low | 0.07 / yr | $385K | |
| 59 | Mason County | Very Low | 0.15 / yr | $283K | |
| 60 | Missaukee County | Very Low | 0.11 / yr | $379K | |
| 61 | Alpena County | Very Low | 0.12 / yr | $274K | |
| 62 | Delta County | Very Low | 0.14 / yr | $288K | |
| 63 | Lake County | Very Low | 0.09 / yr | $213K | |
| 64 | Oscoda County | Very Low | 0.09 / yr | $200K | |
| 65 | Marquette County | Very Low | 0.17 / yr | $244K | |
| 66 | Montmorency County | Very Low | 0.08 / yr | $170K | |
| 67 | Charlevoix County | Very Low | 0.10 / yr | $259K | |
| 68 | Alcona County | Very Low | 0.17 / yr | $177K | |
| 69 | Manistee County | Very Low | 0.14 / yr | $193K | |
| 70 | Presque Isle County | Very Low | 0.17 / yr | $167K | |
| 71 | Leelanau County | Very Low | 0.17 / yr | $222K | |
| 72 | Gogebic County | Very Low | 0.14 / yr | $145K | |
| 73 | Iron County | Very Low | 0.13 / yr | $139K | |
| 74 | Benzie County | Very Low | 0.08 / yr | $173K | |
| 75 | Mackinac County | Very Low | 0.08 / yr | $41K | |
| 76 | Alger County | Very Low | 0.11 / yr | $42K | |
| 77 | Schoolcraft County | Very Low | 0.07 / yr | $41K | |
| 78 | Ontonagon County | Very Low | 0.15 / yr | $32K | |
| 79 | Chippewa County | Very Low | 0.06 / yr | $34K | |
| 80 | Baraga County | Very Low | 0.06 / yr | $22K | |
| 81 | Houghton County | Very Low | 0.05 / yr | $34K | |
| 82 | Luce County | Very Low | 0.04 / yr | $8K | |
| 83 | Keweenaw County | Very Low | 0.05 / yr | $1K |
83 Michigan counties with measurable tornado risk. See the national tornado ranking or all Michigan counties by overall risk.
Frequently Asked Questions
Which Michigan county has the highest tornado risk?
Oakland County has the highest FEMA tornado risk score in Michigan at 99.7 (Very High), with $102M in expected annual losses and about 0.39 events per year.
How many Michigan counties face significant tornado risk?
83 Michigan counties record measurable tornado risk in FEMA's National Risk Index; 11 of them are rated High or Very High.