NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Port Byron, IL
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 Port Byron, Illinois since 1851, 0 of them at hurricane strength; the most recent was an unnamed storm in 1900. Since 1950, 179 tornadoes have touched down within 25 miles, 8 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 1
- Tornadoes
- 179
- EF3 or stronger
- 8
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
1 deaths in all
What the records show for Port Byron
None of the 1 tropical systems was at hurricane strength as it passed Port Byron; the strongest was an unnamed storm in 1900, a tropical storm with 52 mph winds when its centre passed 32 miles away. Of the 548 Illinois cities on this site, 57% have more tropical storms and hurricanes within 75 miles than Port Byron. The strongest of the 179 tornadoes within 25 miles was an F4 on March 29, 1981; its path came within 20 miles. The deadliest, an F3 on June 20, 1974, killed 1 person. Of the 179, 20 had paths within 5 miles of the city centre, and 94 have come since 2000. May has had the most tornadoes, 48. The most recent tornado was on July 11, 2025. Port Byron has more tornadoes within 25 miles than 82% of the 548 Illinois cities. Hail has been reported within 10 miles 95 times since 1962, with stones up to 2.75 inches (baseball size). Of the 548 Illinois cities, 52% have more hail reports within 10 miles than Port Byron.
Compare Port Byron's storm record with another city →
Tropical storms and hurricanes near Port Byron
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 1900 | Unnamed 1900 stormSep 11 | 32 mi | Tropical storm (52 mph) | Category 4 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in Port Byron: 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 Port Byron
By decade
- 2020s43
- 2010s38
- 2000s13
- 1990s33(1 EF3+)
- 1980s15(2 EF3+)
- 1970s18(3 EF3+)
- 1960s16(2 EF3+)
- 1950s3
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Mar 29, 1981 | F4 | 20 mi | 5.1 mi | 0 / 0 |
| Jun 20, 1974 | F3 | 17 mi | 10.6 mi | 1 / 20 |
| Mar 13, 1990 | F3 | 2 mi | 15.5 mi | 0 / 1 |
| May 8, 1988 | F3 | 16 mi | 32 mi | 0 / 0 |
| Jun 14, 1974 | F3 | 24 mi | 48.6 mi | 0 / 2 |
| May 13, 1974 | F3 | 13 mi | 3.6 mi | 0 / 0 |
| Apr 19, 1966 | F3 | 12 mi | 2 mi | 0 / 0 |
| May 7, 1962 | F3 | 21 mi | 10 mi | 0 / 0 |
| Jul 11, 2025 | EF2 | 16 mi | 7.6 mi | 0 / 0 |
| Apr 4, 2023 | EF2 | 16 mi | 2.79 mi | 0 / 0 |
| Apr 4, 2023 | EF2 | 9 mi | 0.52 mi | 0 / 0 |
| Mar 31, 2023 | EF2 | 19 mi | 9.32 mi | 0 / 0 |
The strongest 12 of 179, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Port Byron
The Storm Prediction Center has 95 hail reports within 10 miles of Port Byron since 1962, made on 59 separate days. Of these, 54 were 1 inch across or larger, and one reached 2 inches. The largest, 2.75 inches (baseball size), fell on March 13, 1990. The most recent report is from April 17, 2025. May has the most reports, 28.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Port Byron
The nearest NOAA station with 1991–2020 climate normals is Le Claire L&D 14, IA, 5 miles west of Port Byron at 577 feet. July is the warmest, with an average high of 85°F and low of 66°F; January is the coolest, at 31°F and 14°F. May is the wettest at 4.8 inches of precipitation on average and January the driest at 1.5 inches; the year adds up to 37.2 inches over 67 days with at least a tenth of an inch. Highs reach 90°F on about 18 days a year, almost all from June to September. Lows fall below freezing on about 126 nights a year. That 37.2 inches is more than at 18 of the 146 Illinois stations used on this site (12%). Bettendorf, IA, 9 miles west, has its own station (Rock Island L&D 15, IL): 38.7 inches a year, 1.5 more than here, and a July average high of 84°F against 85°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" |
|---|---|---|---|---|
| Jan | 31 | 14 | 1.5 | 4 |
| Feb | 35 | 18 | 1.6 | 4 |
| Mar | 47 | 28 | 2.6 | 5 |
| Apr | 61 | 40 | 3.8 | 7 |
| May | 72 | 52 | 4.8 | 8 |
| Jun | 82 | 62 | 4.6 | 8 |
| Jul | 85 | 66 | 4.2 | 6 |
| Aug | 83 | 64 | 4.1 | 6 |
| Sep | 77 | 56 | 3.4 | 5 |
| Oct | 64 | 44 | 2.6 | 5 |
| Nov | 48 | 31 | 2.1 | 5 |
| Dec | 36 | 21 | 1.9 | 4 |
| Year | 60 | 41 | 37.2 | 67 |
Averages for 1991–2020 at Le Claire L&D 14, IA (577 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 Port Byron
Since 1996, the National Weather Service has logged 204 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Port Byron: 135 thunderstorm wind reports, 52 floods, 11 flash floods, 3 heavy rain events and 3 lightning strikes. They killed 2 people and injured 11, and the NWS estimated $7.2 million in property and crop damage. The strongest thunderstorm gust on record here was 100 mph, on June 3, 2025. July has had the most flash floods, 6 of 11. Of the 547 Illinois cities on this site with a flash flood on record, 151 have had fewer than Port Byron.
July 21, 2008: thunderstorm wind 9 miles from the centre of Port Byron — 2 killed, 4 injured.
June 18, 2010: thunderstorm wind 2 miles from the centre of Port Byron — 3 injured, $20,000 damage.
NWS: “A roof was torn from a building and tossed onto nearby power poles, causing one of the poles to fall and smash the attached transformers into a passing van and setting the van on fire. The occupants of the van escaped without major injury.”
June 18, 2010: thunderstorm wind 4 miles from the centre of Port Byron — 3 injured, $20,000 damage.
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 Port Byron's ZIP code 61275 have filed 22 claims with the National Flood Insurance Program since 1979, and were paid $52,000 for buildings and contents, in the dollars of each year. The year with the most claims was 2001, with 10. 14% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 320 Illinois cities on this site with 10 or more claims, 77 have fewer than Port Byron.
Rock Island County, which includes Port Byron, has been named in 15 federal disaster or emergency declarations since 1965, 13 of them major disasters (by incident: 9 floods, 2 biological emergencies, 1 hurricane, 1 severe storm). The latest major disaster declaration was Covid-19 Pandemic, on March 26, 2020. FEMA's National Risk Index gives Rock Island County a Relatively Moderate rating for natural hazard risk overall; by hazard: Relatively High for tornadoes, strong wind and lightning; Relatively Moderate for hail, inland flooding and heat waves; Very Low for hurricanes. It models the county's expected loss from all 18 hazards it covers at $45.4 million a year, the 23rd highest of 102 Illinois counties; of the hazards above, the largest share, $16.6 million (36%), 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.