Logan County, Illinois

What hazards hit Logan County most?

The most frequent records are severe thunderstorm wind events: 298 since 1956. 48% of its severe thunderstorm wind events since 1956 fell in June and July. The rank column places the county among Illinois'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 Logan County had?

NOAA records 74 tornadoes in Logan County from 1951 to 2026, the strongest rated F4, with 1 death and 76 injuries recorded in the county. That is 3rd of 102 Illinois counties and 71st 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 73 tornadoes whose track touched Logan County since 1950 (NOAA's county records number 74: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 1 person.

Map of the strongest tornado tracks in Illinois.

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 Logan County?

The most recent record with damage, injuries or deaths is the May 21, 2024 dust storm (6 injuries).

Blowing dust reduced visibilities to near zero at times, resulting in traffic accidents along IL-54 between Mount Pulaski and Chestnut. One accident involved a fuel tanker, a semi truck, and 8 other vehicles near the intersection of IL-54 and 2000th Avenue. 6 people were injured.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 1171557)

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 Logan 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?

48% of its severe thunderstorm wind events since 1956 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 Logan County

FEMA's register lists 12 declarations that include Logan County: 9 major disasters, 3 emergencies and 0 fire management assistance declarations. Most were for severe storm (2) and biological (2).

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 Logan County had?

NOAA's Storm Events Database holds 50 flood or flash flood records for Logan County from 1998 to 2026, on 46 days, with 1 death. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Logan County ranks 1596th of 2,942 U.S. counties.

The National Flood Insurance Program has paid $113,000 on 58 claims filed in Logan County; the most in one year was 14 in 1982. 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 Logan County

FEMA's National Risk Index rates Logan County Relatively Low overall, with an expected annual loss of $20.3 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 Logan County

1. Sangamon County 1,107
2. McLean County 1,003
3. Tazewell County 913
4. Macon County 716
5. Logan County 684
6. De Witt County 393
7. Mason County 384
8. Menard County 367

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 IllinoisEvery Illinois tornado since 1950 and the counties with the most per square mile
• Severe thunderstorm wind in IllinoisThe state's severe thunderstorm wind events, by county, year and month
• The Illinois recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in Logan CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download Logan County's FEMA declarations (CSV)12 rows: every declaration that named the county, for your own analysis