Ottawa County, Michigan

What hazards hit Ottawa County most?

The most frequent records are severe thunderstorm wind events: 189 since 1962. 45% of its severe thunderstorm wind events since 1962 fell in June and July. The rank column places the county among Michigan's counties by days with a record per 1,000 square miles of land over each hazard's complete period.

Source: NOAA NCEI Storm Events Database (county and forecast-zone records attributed to the county; a zone record shows its own totals on each county it covers). Days: dates with at least one record of the hazard in the county. Ranks: days with a record per 1,000 square miles of land (Census Bureau 2024 Gazetteer), since 1950 for tornadoes, 1955 for hail and thunderstorm wind, 1996 for the rest.

How many tornadoes has Ottawa County had?

NOAA records 25 tornadoes in Ottawa County from 1956 to 2025, the strongest rated F5, with 14 deaths and 202 injuries recorded in the county. That is 13th of 83 Michigan counties by days with tornadoes per 1,000 square miles since 1950. A tornado that crossed a county line is counted in each county it touched, with the length of its path inside the county.

Counted as whole tornadoes rather than county records, the Storm Prediction Center's database holds 24 tornadoes whose track touched Ottawa County since 1950 (NOAA's county records number 25: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 22 people, 14 of them in Ottawa County.

Map of the strongest tornado tracks in Michigan.

Source: NOAA NCEI Storm Events Database, tornado records by county (path length in the county, maximum width); ratings as published: F scale before February 1, 2007, EF scale after. Whole-track figures: NOAA Storm Prediction Center tornado database (1950-2025). SPC severe weather database.

When was the last damaging storm in Ottawa County?

The most recent record with damage, injuries or deaths is the January 18, 2026 winter storm (10 injuries).

Widespread 10 to 16 inches of snow across Ottawa County. This fell in combined with wind gusts over 50 mph. Road conditions in snow and blowing snow resulted in a pileup with more than 100 vehicles on I-196, shutting the highway down for cleanup.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 1314808)

Source: NOAA NCEI Storm Events Database; every record of 2025-2026 is listed, earlier ones when they caused deaths, injuries or $250,000 of damage (2025 dollars), and every tornado.

The deadliest and costliest records

A damage figure marked "step" is a record from before 1993: NOAA then filed damage by category, and the figure is the category as entered, in the dollars of that year, not an estimate of the loss.

Source: NOAA NCEI Storm Events Database: deaths and injuries direct and indirect; damage is property plus crops as estimated by the National Weather Service, converted to 2025 dollars.

Is it getting more frequent?

Records per decade for Ottawa County's most frequent hazards. Counts rose everywhere after 1996, when NOAA began recording every event type, so compare decades within a hazard's complete period only (the shaded cells come before it).

Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).

What time of year?

45% of its severe thunderstorm wind events since 1962 fell in June and July. The two busiest months are in violet.

Source: NOAA NCEI Storm Events Database, records by the month they began.

Federal disaster declarations for Ottawa County

FEMA's register lists 16 declarations that include Ottawa County: 10 major disasters, 6 emergencies and 0 fire management assistance declarations. Most were for flood (4) and severe storm (4).

Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), declarations through October 2, 2026; one declaration is counted once however many areas it names. OpenFEMA dataset page.

How many floods has Ottawa County had?

NOAA's Storm Events Database holds 23 flood or flash flood records for Ottawa County from 1996 to 2026, on 20 days, with 2 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Ottawa County ranks 690th of 2,942 U.S. counties.

The National Flood Insurance Program has paid $3.4 million on 336 claims filed in Ottawa County; the most in one year was 61 in 2013. Claims count insured losses only: uninsured flood damage is not in this file.

Source: FEMA OpenFEMA NFIP Redacted Claims, as of September 8, 2026; claims by year of loss, payments in the dollars of the year paid. OpenFEMA dataset page.

FEMA's modeled risk for Ottawa County

FEMA's National Risk Index rates Ottawa County Relatively Moderate overall, with an expected annual loss of $68.2 million. These are FEMA's model estimates of future loss from 18 hazards, not a count of what happened; they can differ from the record above.

Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.

Counties that share a border with Ottawa County

1. Milwaukee County, WI 1,113
2. Racine County, WI 917
3. Kent County 654
4. Allegan County 559
5. Ottawa County 530
6. Muskegon County 399

Source: U.S. Census Bureau county adjacency file; NOAA NCEI Storm Events Database, records since 1950. The Census Bureau's adjacency file.

Next

• Tornadoes in MichiganEvery Michigan tornado since 1950 and the counties with the most per square mile
• Severe thunderstorm wind in MichiganThe state's severe thunderstorm wind events, by county, year and month
• The Michigan recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in Ottawa CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download Ottawa County's FEMA declarations (CSV)16 rows: every declaration that named the county, for your own analysis