NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit O Fallon, MO
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
2 tropical systems have passed within 75 miles of O Fallon, Missouri since 1851, 0 of them at hurricane strength; the most recent was Ike in 2008. Since 1950, 129 tornadoes have touched down within 25 miles, 13 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 2
- Tornadoes
- 129
- EF3 or stronger
- 13
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
39 deaths in all
What the records show for O Fallon
None of the 2 tropical systems was at hurricane strength as it passed O Fallon; the strongest was Ike in 2008, a tropical storm with 48 mph winds when its centre passed 50 miles away. The record near O Fallon begins with an unnamed storm in 1902; the most recent system was Ike in 2008. Of the 334 Missouri cities on this site, 43% have more tropical storms and hurricanes within 75 miles than O Fallon. The highest rating among the 129 tornadoes within 25 miles is F4 or EF4, reached 4 times; the most recent, on April 22, 2011, came within 13 miles. The deadliest, an F4 on February 10, 1959, killed 21 people. Of the 129, 10 had paths within 5 miles of the city centre, and 71 have come since 2000. May has had the most tornadoes, 26. The most recent tornado was on June 4, 2025. O Fallon has more tornadoes within 25 miles than 78% of the 334 Missouri cities. Hail has been reported within 10 miles 242 times since 1959, with stones up to 3 inches (tea cup size). O Fallon has more hail reports within 10 miles than 87% of the 334 Missouri cities.
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Tropical storms and hurricanes near O Fallon
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 2008 | IkeSep 14 | 50 mi | Tropical storm (48 mph) | Category 4 |
| 1902 | Unnamed 1902 stormJun 28 | 21 mi | Tropical storm (40 mph) | Category 1 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in O Fallon: a hurricane's worst winds sit within a few dozen miles of its centre, and inland cities are usually past that.
Tornadoes within 25 miles of O Fallon
By decade
- 2020s16(1 EF3+)
- 2010s35(3 EF3+)
- 2000s20
- 1990s12
- 1980s10(3 EF3+)
- 1970s7
- 1960s10(3 EF3+)
- 1950s19(3 EF3+)
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Feb 10, 1959 | F4 | 19 mi | 23.9 mi | 21 / 345 |
| Feb 24, 1956 | F4 | 21 mi | 77.6 mi | 6 / 36 |
| Jan 24, 1967 | F4 | 11 mi | 25 mi | 3 / 216 |
| Apr 22, 2011 | EF4 | 13 mi | 21.3 mi | 0 / 5 |
| Dec 10, 2021 | EF3 | 8 mi | 27.3 mi | 1 / 2 |
| Dec 31, 2010 | EF3 | 23 mi | 6.65 mi | 1 / 6 |
| May 31, 2013 | EF3 | 6 mi | 31.71 mi | 0 / 8 |
| Nov 15, 1988 | F3 | 1 mi | 1 mi | 0 / 10 |
| Apr 29, 1984 | F3 | 15 mi | 8 mi | 0 / 0 |
| Apr 7, 1980 | F3 | 21 mi | 7.3 mi | 0 / 15 |
| Oct 24, 1967 | F3 | 13 mi | 21.8 mi | 0 / 2 |
| Oct 14, 1966 | F3 | 10 mi | 2.7 mi | 0 / 26 |
The strongest 12 of 129, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in O Fallon
The Storm Prediction Center has 242 hail reports within 10 miles of O Fallon since 1959, made on 121 separate days. Of these, 141 were 1 inch across or larger, and 21 reached 2 inches. The largest size, 3 inches (tea cup size), was reported on 2 days, most recently May 13, 2023. The most recent report is from May 16, 2025. May has the most reports, 74.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in O Fallon
The nearest NOAA station with 1991–2020 climate normals is Weldon Spring NWS, MO, 6 miles south of O Fallon at 610 feet. July is the warmest, with an average high of 88°F and low of 67°F; January is the coolest, at 39°F and 21°F. May is the wettest at 5.1 inches of precipitation on average and February the driest at 2.4 inches; the year adds up to 44.4 inches over 70 days with at least a tenth of an inch. Highs reach 90°F on about 36 days a year, almost all from June to September. Lows fall below freezing on about 105 nights a year. Snowfall averages 13.5 inches a year, most of it in January. That 44.4 inches is more than at 74 of the 134 Missouri stations used on this site (55%). Saint Peters, 5 miles east, has its own station (St Peters 2 SE, MO): 42.4 inches a year, 2.0 less than here, and the same July average high, 88°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 39 | 21 | 2.6 | 4 | 4.1 |
| Feb | 45 | 24 | 2.4 | 4 | 3.7 |
| Mar | 55 | 33 | 3.7 | 7 | 1.7 |
| Apr | 67 | 44 | 4.7 | 7 | 0.2 |
| May | 76 | 54 | 5.1 | 8 | 0.0 |
| Jun | 84 | 63 | 4.7 | 7 | 0.0 |
| Jul | 88 | 67 | 3.9 | 6 | 0.0 |
| Aug | 87 | 65 | 3.6 | 6 | 0.0 |
| Sep | 80 | 57 | 3.5 | 5 | 0.0 |
| Oct | 68 | 46 | 3.4 | 6 | 0.0 |
| Nov | 55 | 35 | 3.7 | 6 | 0.8 |
| Dec | 44 | 26 | 3.1 | 5 | 3.0 |
| Year | 66 | 45 | 44.4 | 70 | 13.5 |
Averages for 1991–2020 at Weldon Spring NWS, MO (610 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near O Fallon
Since 1996, the National Weather Service has logged 245 flood, rain, thunderstorm wind and lightning events that began within 10 miles of O Fallon: 223 thunderstorm wind reports, 18 flash floods, 2 floods and 2 lightning strikes. They killed 1 person and injured 17, and the NWS estimated $52.5 million in property and crop damage. The strongest thunderstorm gust on record here was 120 mph, on April 9, 2015. Of the 334 Missouri cities on this site with a flash flood on record, 155 have had fewer than O Fallon.
July 26, 2022: flash flood 8 miles from the centre of O Fallon — 1 killed, $50.0 million damage.
April 18, 1997: thunderstorm wind 5 miles from the centre of O Fallon — 10 injured, $100,000 damage.
July 23, 2017: thunderstorm wind 1 mile from the centre of O Fallon — 3 injured.
NWS: “A wide swath of damaging winds extended from O'Fallon through northern St. Peters to the Portage Des Sioux.”
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Flood insurance policyholders in O Fallon's 2 ZIP codes have filed 347 claims with the National Flood Insurance Program since 1979, and were paid $7.0 million for buildings and contents, in the dollars of each year. The most came from Midwest Flooding in 1993: 59 claims (17% of all) and $2.3 million, then Flooding in 1986 with 44 and Not a named storm in 1982 with 22. 46% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 172 Missouri cities on this site with 10 or more claims, 149 have fewer than O Fallon.
| Event | Claims | Paid |
|---|---|---|
| Midwest Flooding1993 | 59 | $2.3 million |
| Flooding1986 | 44 | $413,000 |
| Not a named storm1982 | 22 | $242,000 |
| Late July Flooding2022 | 15 | $1.0 million |
| Hurricane Ike2008 | 10 | $177,000 |
St. Charles County, which includes O Fallon, has been named in 28 federal disaster or emergency declarations since 1965, 19 of them major disasters (by incident: 11 severe storms, 9 floods, 3 ice storms, 2 biological emergencies). The latest major disaster declaration was Severe Storms and Flooding, on August 8, 2022. FEMA's National Risk Index gives St. Charles County a Relatively Moderate rating for natural hazard risk overall; by hazard: Very High for strong wind; Relatively High for tornadoes, hail, inland flooding and lightning; Relatively Moderate for heat waves; Very Low for hurricanes. It models the county's expected loss from all 18 hazards it covers at $215.2 million a year, the 4th highest of 115 Missouri counties; of the hazards above, the largest share, $115.9 million (54%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near O Fallon
- Lake St Louis, MO4 mi
- Saint Peters, MO5 mi
- Defiance, MO8 mi
- Saint Charles, MO8 mi
- Wentzville, MO8 mi
- Old Monroe, MO11 mi
- Chesterfield, MO12 mi
- Foristell, MO13 mi
- Wildwood, MO15 mi
- Maryland Heights, MO15 mi
- Moscow Mills, MO15 mi
- Winfield, MO15 mi
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