NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Corydon, IA
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
1 tropical system has passed within 75 miles of Corydon, Iowa since 1851, 0 of them at hurricane strength; the most recent was an unnamed storm in 1900. Since 1950, 75 tornadoes have touched down within 25 miles, 8 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 1
- Tornadoes
- 75
- EF3 or stronger
- 8
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
4 deaths in all
What the records show for Corydon
None of the 1 tropical systems was at hurricane strength as it passed Corydon; the strongest was an unnamed storm in 1900, a tropical storm with 41 mph winds when its centre passed 18 miles away. Corydon is tied for the most tropical storms and hurricanes within 75 miles among the 241 Iowa cities on this site. The highest rating among the 75 tornadoes within 25 miles is F4, reached 5 times; the most recent, on June 7, 1984, came within 3 miles. Of the 75, 9 had paths within 5 miles of the city centre, and 31 have come since 2000. June has had the most tornadoes, 20. The most recent tornado was on May 6, 2024. Of the 241 Iowa cities, 97% have more tornadoes within 25 miles than Corydon. Hail has been reported within 10 miles 33 times since 1974, with stones up to 2.75 inches (baseball size). Of the 241 Iowa cities, 98% have more hail reports within 10 miles than Corydon.
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Tropical storms and hurricanes near Corydon
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 1900 | Unnamed 1900 stormSep 11 | 18 mi | Tropical storm (41 mph) | Category 4 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in Corydon: 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 Corydon
By decade
- 2020s8(1 EF3+)
- 2010s10
- 2000s13
- 1990s9(2 EF3+)
- 1980s19(2 EF3+)
- 1970s4(1 EF3+)
- 1960s6
- 1950s6(2 EF3+)
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 7, 1984 | F4 | 3 mi | 134 mi | 3 / 64 |
| Jun 2, 1980 | F4 | 12 mi | 31.2 mi | 0 / 0 |
| Apr 21, 1973 | F4 | 20 mi | 14.6 mi | 0 / 1 |
| May 20, 1959 | F4 | 10 mi | 17.2 mi | 0 / 5 |
| May 10, 1953 | F4 | 8 mi | 6.4 mi | 0 / 0 |
| Mar 5, 2022 | EF3 | 13 mi | 11.28 mi | 1 / 1 |
| Apr 8, 1999 | F3 | 24 mi | 39 mi | 0 / 5 |
| May 27, 1995 | F3 | 23 mi | 30.4 mi | 0 / 0 |
| Mar 5, 2022 | EF2 | 2 mi | 9.87 mi | 0 / 0 |
| Mar 5, 2022 | EF2 | 11 mi | 19.42 mi | 0 / 0 |
| Mar 6, 2017 | EF2 | 23 mi | 9.66 mi | 0 / 0 |
| Mar 6, 2017 | EF2 | 11 mi | 14.92 mi | 0 / 0 |
The strongest 12 of 75, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Corydon
The Storm Prediction Center has 33 hail reports within 10 miles of Corydon since 1974, made on 26 separate days. Of these, 19 were 1 inch across or larger, and 2 reached 2 inches. The largest, 2.75 inches (baseball size), fell on May 8, 2003. The most recent report is from June 17, 2017. July has the most reports, 9.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Corydon
The nearest NOAA station with 1991–2020 climate normals is Allerton, IA, 5 miles southwest of Corydon at 1,090 feet. July is the warmest, with an average high of 85°F and low of 64°F; January is the coolest, at 32°F and 13°F. May is the wettest at 5.7 inches of precipitation on average and January the driest at 1.1 inches; the year adds up to 40.5 inches. Highs reach 90°F on about 16 days a year, almost all from June to September. Lows fall below freezing on about 141 nights a year. That 40.5 inches is more than at 121 of the 124 Iowa stations used on this site (98%). Chariton, 19 miles north, has its own station (Chariton 1 E, IA): 37.4 inches a year, 3.1 less than here, and the same July average high, 85°F.
| Month | High °F | Low °F | Precip. in |
|---|---|---|---|
| Jan | 32 | 13 | 1.1 |
| Feb | 37 | 17 | 1.5 |
| Mar | 49 | 28 | 2.4 |
| Apr | 62 | 38 | 4.0 |
| May | 71 | 50 | 5.7 |
| Jun | 80 | 60 | 5.1 |
| Jul | 85 | 64 | 4.7 |
| Aug | 83 | 62 | 4.9 |
| Sep | 76 | 54 | 4.2 |
| Oct | 64 | 41 | 3.1 |
| Nov | 49 | 28 | 2.2 |
| Dec | 37 | 19 | 1.6 |
| Year | 60 | 39 | 40.5 |
Averages for 1991–2020 at Allerton, IA (1,090 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 Corydon
Since 1996, the National Weather Service has logged 89 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Corydon: 37 thunderstorm wind reports, 30 heavy rain events, 18 flash floods and 4 floods. None is recorded as killing or injuring anyone; the NWS estimated $5.6 million in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on March 21, 2007. July has had the most flash floods, 8 of 18. Of the 240 Iowa cities on this site with a flash flood on record, 161 have had fewer than Corydon.
August 26, 2009: flash flood 3 miles from the centre of Corydon — $2.8 million damage.
NWS: “Emergency Manager reported flash flooding at several locations over the southwest half of Wayne County between 2030 and 2400 CDT. Several roads were closed due to high water rushing bumper deep.”
August 24, 2007: flash flood 4 miles from the centre of Corydon — $600,000 damage.
NWS: “Gravel roads were washed out across Wayne County with numerous bridges under water. Emergency Management asked that the public not travel on hard top or gravel roads.”
August 24, 2007: flash flood 6 miles from the centre of Corydon — $600,000 damage.
NWS: “Two people were rescued from vehicles at two locations southeast of Corydon. Seven to ten inch rainfall amounts were received.”
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
Wayne County, which includes Corydon, has been named in 15 federal disaster or emergency declarations since 1973, 13 of them major disasters (by incident: 6 severe storms, 5 floods, 2 biological emergencies, 1 hurricane). The latest major disaster declaration was Covid-19 Pandemic, on March 23, 2020. FEMA's National Risk Index gives Wayne County a Very Low rating for natural hazard risk overall; by hazard: Relatively Low for tornadoes, hail, strong wind and heat waves; Very Low for hurricanes, inland flooding and lightning. It models the county's expected loss from all 18 hazards it covers at $5.9 million a year, the 98th highest of 99 Iowa counties; of the hazards above, the largest share, $1.3 million (22%), 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 Corydon
- Chariton, IA19 mi
- Centerville, IA22 mi
- Leon, IA22 mi
- Unionville, MO27 mi
- Princeton, MO29 mi
- Osceola, IA30 mi
- Albia, IA33 mi
- Lamoni, IA34 mi
- Milo, IA37 mi
- Knoxville, IA40 mi
- Milan, MO41 mi
- Pleasantville, IA43 mi
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