Osage County, Oklahoma

What hazards hit Osage County most?

The most frequent records are hail reports: 672 since 1958. 54% of its hail reports since 1958 fell in April and May. The rank column places the county among Oklahoma'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 Osage County had?

NOAA records 118 tornadoes in Osage County from 1955 to 2026, the strongest rated EF4, with 4 deaths and 93 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 114 tornadoes whose track touched Osage County since 1950 (NOAA's county records number 118: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 19 people, 4 of them in Osage County.

Map of the strongest tornado tracks in Oklahoma.

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 Osage County?

The most recent record with damage, injuries or deaths is the May 8, 2026 hail ($250,000 in damage in 2025 dollars).

Baseball size hail damaged homes and vehicles.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 1325407)

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 Osage 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).

Drought in the 2010s: 48 records against 11 in the decade before, 48 of them forecast-zone records. Cells marked z rose mostly through zone records. The local National Weather Service office files these once per forecast zone, so a change in how it draws its zones or splits a storm into records moves this count as much as the weather does; read it beside the Osage County days with a record above.

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

What time of year?

54% of its hail reports since 1958 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 Osage County

FEMA's register lists 42 declarations that include Osage County: 30 major disasters, 8 emergencies and 4 fire management assistance declarations. Most were for severe storm (15) and severe ice storm (8).

The 40 most recent of 42 are listed; the CSV has every one.

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 Osage County had?

NOAA's Storm Events Database holds 84 flood or flash flood records for Osage County from 1996 to 2025, on 59 days, with 0 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Osage County ranks 1324th of 2,942 U.S. counties.

The National Flood Insurance Program has paid $1.2 million on 96 claims filed in Osage County; the most in one year was 16 in 1986. 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 Osage County

FEMA's National Risk Index rates Osage County Relatively Low overall, with an expected annual loss of $27.6 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 Osage County

1. Tulsa County 2,681
2. Osage County 1,740
3. Kay County 1,627
4. Cowley County, KS 1,585
5. Washington County 840
6. Pawnee County 807
7. Noble County 785
8. Chautauqua County, KS 591

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 OklahomaEvery Oklahoma tornado since 1950 and the counties with the most per square mile
• Hail in OklahomaThe state's hail reports, by county, year and month
• The Oklahoma recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in Osage CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download Osage County's FEMA declarations (CSV)42 rows: every declaration that named the county, for your own analysis