Seminole County, Oklahoma

What hazards hit Seminole County most?

The most frequent records are hail reports: 271 since 1957. 44% of its hail reports since 1957 fell in March and April. 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 Seminole County had?

NOAA records 61 tornadoes in Seminole County from 1954 to 2026, the strongest rated F4, with 0 deaths and 63 injuries recorded in the county. That is 10th of 77 Oklahoma counties and 121st of 3,080 U.S. 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 63 tornadoes whose track touched Seminole County since 1950 (NOAA's county records number 61: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 2 people, 0 of them in Seminole 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 Seminole County?

The most recent record with damage, injuries or deaths is the April 24, 2026 hail ($10,000 in damage in 2025 dollars).

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 Seminole 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?

44% of its hail reports since 1957 fell in March and April. The two busiest months are in violet.

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

Federal disaster declarations for Seminole County

FEMA's register lists 33 declarations that include Seminole County: 24 major disasters, 8 emergencies and one fire management assistance declaration. Most were for severe storm (14) and severe ice storm (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 Seminole County had?

NOAA's Storm Events Database holds 27 flood or flash flood records for Seminole County from 1996 to 2025, on 20 days, with 2 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Seminole County ranks 1723rd of 2,942 U.S. counties.

The National Flood Insurance Program has paid $1.1 million on 44 claims filed in Seminole County; the most in one year was 11 in 2015. 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 Seminole County

FEMA's National Risk Index rates Seminole County Relatively Low overall, with an expected annual loss of $13.4 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 Seminole County

1. Pontotoc County 1,043
2. Pottawatomie County 961
3. Seminole County 745
4. Okfuskee County 734
5. Hughes County 638

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 Seminole CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download Seminole County's FEMA declarations (CSV)33 rows: every declaration that named the county, for your own analysis