Mason storm history
Storm events recorded in Mason, Illinois between 1950 and 2025.
361
Total events
40
Tornadoes
51
Hail
27
Floods
2
Deaths
$13.2M
Property damage
Most significant events
Strongest tornadoes, deadliest events, and biggest damage in this county. Up to 50 shown.
Hundreds of cabins and sheds in wildlife areas along the Illinois River were severely damaged. In addition, 25 homes and several other structures were damaged near Bath, Snicarte, Havana and Goofy Ridge. Nearly 15 miles of roads will need to be rebuilt due to the flooding. The ri…
Thunderstorm Wind Thunderstorm Wind
Power lines were blown down on Jacobs Road between Manito and Green Valley.
Heavy Snow Heavy Snow
Weather observers measured 6 to 8 inches of snow across Mason County...including 7.5 inches in Manito and 7.0 inches in Havana. Due to snow-covered and slick roadways, numerous traffic accidents occurred.
Drought Drought
Due to a four-month precipitation deficit, Severe Drought (D2) was ongoing at the start of the month. Despite above normal snowfall during December, precipitation was still below normal, and the continued below normal precipitation led to the Severe Drought (D2) persisting throug…
Heavy Snow Heavy Snow
Numerous weather observers measured 5 to 10 inches of snow across Mason County...including 7.8 inches in Havana. Due to both falling snow and considerable blowing and drifting snow, travel became extremely hazardous...leading to numerous accidents on area roadways.
Drought Drought
Due to a three-month precipitation deficit, Severe Drought (D2) was ongoing at the start of the month. Continued below normal precipitation and above normal temperatures led to the Severe Drought (D2) persisting through the month.
Drought Drought
Due to a two-month rainfall deficit, Severe Drought (D2) was ongoing at the start of the month. Continued below normal precipitation and above normal temperatures led to the Severe Drought (D2) persisting through the month.
Tornado EF0 Tornado
A tornado touched down in a field 2 miles east-northeast of Mason City at 3:09 PM CDT. It tracked slowly southeastward through fields causing minor tree damage before crossing Highway 10 and dissipating 2 miles west of New Holland at 3:15 PM CDT.
Drought Drought
Due to a two-month rainfall deficit, Severe Drought (D2) conditions developed across Mason County on September 30th.
Tornado EF0 Tornado
A brief EF-0 tornado occurred approximately two miles northeast of Mason City. The tornado knocked over one tree, and also blew down a few tree limbs and corn along County Road 1200 N before dissipating.
Thunderstorm Wind Thunderstorm Wind
A tree was blown onto a power line along County Road 750 North.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm winds resulted in structural damage to the porch of a home.
High Wind High Wind
A power pole was snapped due to high winds, resulting in a road closure.
Winter Weather Winter Weather
Weather observers measured 1 to 3 inches of snow across Mason County. Due to snow-covered roadways, several traffic accidents were reported.
Heavy Snow Heavy Snow
Weather observers measured 6 to 8 inches of snow across the southern half of Mason County...including 6.0 inches in Bath. Due to snow-covered and hazardous roadways, numerous traffic accidents were reported.
Excessive Heat Excessive Heat
Heat index readings peaked at 110-115 degrees during the afternoon of August 27th. No heat-related deaths were reported.
Thunderstorm Wind Thunderstorm Wind
Several large tree branches were blown down in Riverfront Park.
Thunderstorm Wind Thunderstorm Wind
Minor damage occurred to shingles and siding of a house.
Thunderstorm Wind Thunderstorm Wind
Trees blown down onto the road, blocking traffic between Goofy Ridge and Bishop.
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Winter Weather Winter Weather
A period of freezing rain resulted in ice accumulations less than a quarter inch. There were numerous car accidents or slide-offs. Transportation services were also impacted across the region, with many bus, train, or airplane operators suspending operations. Conditions improved …
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Brisk northwesterly winds in conjunction with air temperatures dipping below zero resulted in dangerously cold wind-chill values bottoming out at 25 below to 35 below zero at times.
Thunderstorm Wind Thunderstorm Wind
Numerous tree branches and a few trees were snapped in Mason City.
Excessive Heat Excessive Heat
A prolonged stretch of dangerous heat and humidity occurred across the Midwest. Peak afternoon heat indices were near or over 110 degrees each day, and heat indices remained above 80 degrees overnight. A mesonet station two miles southeast of Topeka and a mesonet station in Snica…
Drought Drought
Severe Drought (D2) conditions lingered across Mason County into the first week of August. Agricultural stress was common.
Excessive Heat Excessive Heat
A two-day stretch of dangerous heat and humidity occurred across the Midwest as high temperatures climbed into the 90s while dewpoints were in the upper 70s or low 80s. In Mason County, a mesonet station in Topeka measured a maximum heat index of 115 degrees on July 27.
Drought Drought
Severe drought conditions (D2) that developed in June persisted across Mason County through July. Agricultural stress was common.
Drought Drought
Severe Drought (D2) conditions developed across Mason County on June 27th and persisted through the end of the month. Agricultural stress was common across the county.
Hail Hail
Flash Flood Flash Flood
Several roadways had water flowing across them in southern Mason County.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Temperatures between zero and ten degrees below zero and wind speeds of 25 to 35 mph resulted in a prolonged period of wind chills colder than 25 degrees below zero.
Winter Storm Winter Storm
Weather observers across Mason County reported 1 to 3 inches of snow. Strong northwesterly winds gusting in excess of 40mph created near white-out conditions at times, especially in rural locations. Numerous traffic accidents occurred as roads became snow-covered and hazardous. I…
Tornado EF0 Tornado
A tornado touched down in a field just north of County Road 1300 North about 2.5 miles north of Mason City at 4:46 AM CDT. The tornado tracked southeastward toward the intersection of County Road 1300 North and County Road 3600 East, flipping an empty trailer hopper and damaging …
Thunderstorm Wind Thunderstorm Wind
Tree limbs were blown down.
Tornado EF0 Tornado
A tornado touched down 4.4 miles northeast of Kilbourne at 10:11pm CST. It tracked northeastward, knocking over 6 irrigation systems and damaging several trees before dissipating 1 mile east of Easton at 10:19pm CST.
Thunderstorm Wind Thunderstorm Wind
A few trees were damaged.
Thunderstorm Wind Thunderstorm Wind
A power pole was damaged.
Heavy Snow Heavy Snow
Weather observers measured 8 to 10 inches of snow across Mason County...including 9.5 inches in Bath and 7.5 inches in Mason City. Falling and blowing snow led to hazardous driving conditions and numerous traffic accidents across the area.
Winter Storm Winter Storm
Weather observers measured 6 to 12 inches of snow across Mason County. The heavy snow accumulations and considerable blowing and drifting snow led to road closures and numerous traffic accidents.
Thunderstorm Wind Thunderstorm Wind
A large tree limb was blown down.
Tornado EF0 Tornado
A tornado touched down at 10:28 PM CDT 3 miles northwest of Mason City. The tornado tracked northeastward, snapping 3 power poles along County Road 1250 North near the intersection with County Road 3300 East before dissipating at 10:34 PM CDT near the intersection of County Road …
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Dangerously cold wind-chill readings of 25 below to 30 below zero were observed across Mason County.
Events by year
| Year | Events | Tornadoes |
|---|---|---|
| 2025 | 14 | 2 |
| 2024 | 11 | 0 |
| 2023 | 8 | 0 |
| 2022 | 9 | 2 |
| 2021 | 4 | 1 |
| 2020 | 8 | 0 |
| 2019 | 9 | 0 |
| 2018 | 8 | 2 |
| 2017 | 10 | 1 |
| 2016 | 6 | 0 |
| 2015 | 13 | 1 |
| 2014 | 13 | 0 |
| 2013 | 5 | 0 |
| 2012 | 9 | 0 |
| 2011 | 12 | 1 |
| 2010 | 11 | 0 |
| 2009 | 6 | 1 |
| 2008 | 11 | 0 |
| 2007 | 7 | 0 |
| 2006 | 16 | 0 |
| 2005 | 5 | 0 |
| 2004 | 9 | 0 |
| 2003 | 13 | 4 |
| 2002 | 9 | 0 |
| 2001 | 10 | 1 |
| 2000 | 6 | 0 |
| 1999 | 13 | 1 |
| 1998 | 26 | 4 |
| 1997 | 10 | 0 |
| 1996 | 9 | 2 |
| 1995 | 2 | 0 |
| 1994 | 5 | 0 |
| 1993 | 1 | 0 |
| 1992 | 6 | 0 |
| 1991 | 4 | 0 |
| 1990 | 2 | 1 |
| 1988 | 1 | 0 |
| 1987 | 2 | 1 |
| 1986 | 4 | 0 |
| 1985 | 2 | 1 |
| 1982 | 1 | 0 |
| 1981 | 4 | 1 |
| 1980 | 1 | 0 |
| 1977 | 5 | 0 |
| 1976 | 1 | 0 |
| 1975 | 1 | 1 |
| 1974 | 7 | 2 |
| 1973 | 1 | 1 |
| 1972 | 1 | 1 |
| 1968 | 1 | 1 |
| 1967 | 2 | 2 |
| 1966 | 1 | 0 |
| 1964 | 2 | 1 |
| 1961 | 1 | 1 |
| 1957 | 2 | 2 |
| 1951 | 1 | 1 |