Floyd County, Iowa

What hazards hit Floyd County most?

The most frequent records are hail reports: 165 since 1959. 49% of its hail reports since 1959 fell in April and May. The rank column places the county among Iowa'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 Floyd County had?

NOAA records 26 tornadoes in Floyd County from 1959 to 2024, the strongest rated F5, with 13 deaths and 458 injuries recorded in the county. 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 27 tornadoes whose track touched Floyd County since 1950 (NOAA's county records number 26: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 13 people.

Map of the strongest tornado tracks in Iowa.

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 Floyd County?

The most recent record with damage, injuries or deaths is the April 14, 2026 hail ($850,000 in damage in 2025 dollars).

The public reported three and a quarter inch diameter hail in Charles City.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 1333619)

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 Floyd 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?

49% of its hail reports since 1959 fell in April and May. The two busiest months are in violet.

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

Federal disaster declarations for Floyd County

FEMA's register lists 20 declarations that include Floyd County: 18 major disasters, 2 emergencies and 0 fire management assistance declarations. Most were for severe storm (8) and flood (8).

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 Floyd County had?

NOAA's Storm Events Database holds 63 flood or flash flood records for Floyd County from 1998 to 2025, on 53 days, with 1 death. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Floyd County ranks 808th of 2,942 U.S. counties.

The National Flood Insurance Program has paid $4.5 million on 264 claims filed in Floyd County; the most in one year was 115 in 2008. 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 Floyd County

FEMA's National Risk Index rates Floyd County Relatively Low overall, with an expected annual loss of $14.6 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 Floyd County

1. Cerro Gordo County 854
2. Butler County 734
3. Floyd County 621
4. Franklin County 602
5. Bremer County 583
6. Chickasaw County 495
7. Howard County 493
8. Mitchell County 484

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 IowaEvery Iowa tornado since 1950 and the counties with the most per square mile
• Hail in IowaThe state's hail reports, by county, year and month
• The Iowa recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in Floyd CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download Floyd County's FEMA declarations (CSV)20 rows: every declaration that named the county, for your own analysis