Williamson storm history
Storm events recorded in Williamson, Illinois between 1950 and 2025.
873
Total events
22
Tornadoes
120
Hail
67
Floods
13
Deaths
$497.7M
Property damage
Most significant events
Strongest tornadoes, deadliest events, and biggest damage in this county. Up to 50 shown.
A violent EF-4 tornado with peak winds of 190 mph impacted southern Williamson County, IL, during the early evening hours of Friday, May 16, 2025. The tornado began near the intersection of Spillway Road and Grassy Road doing mainly tree damage. As it moved eastward, the tornado …
Very heavy rain from a slow-moving thunderstorm caused streets to flood and ditches to run full. A 9-year-old boy attempting to retrieve an object from a culvert was swept into it by rushing water. He later died at a hospital in St. Louis.
Widespread wind damage occurred countywide. Extensive tree and power line damage resulted in power outages up to several days long. Many power poles were snapped. Countywide, efforts to restore power were complicated by swampy fields, mud, and downed trees. Ninety-five percent of…
Giant hail occurred in a swath of Williamson County along Illinois Route 13. The swath of large hail began near the Marion/Williamson County airport, just east and southeast of Crainville. Hail slightly larger than baseballs pounded the area in the immediate vicinity of the Mario…
Dense Fog Dense Fog
Dense Fog Dense Fog
Dense Fog Dense Fog
Drought Drought
Heat Heat
Excessive Heat Excessive Heat
Heat Heat
Excessive Heat Excessive Heat
Excessive Heat Excessive Heat
Extreme heat continued from the third week of July. Heat indices only reached heat advisory duration criteria July 26th and July 30th.
Excessive Heat Excessive Heat
Extreme heat continued into late July.
Flash Flood Flash Flood
Flash flooding was reported on Timber Trail and West Grand Avenue. Radar estimated hourly rainfall amounts for this area peaked at around 1.25. The lack of much subsequent rainfall limited the flood duration.
Heat Heat
Dense Fog Dense Fog
Dense Fog Dense Fog
Hail Hail
Two reports of nickel sized hail were made in Johnston City.
Thunderstorm Wind Thunderstorm Wind
A tree was blown down onto a car in Herrin.
Strong Wind Strong Wind
Scattered wires were downed in the Herrin area from winds well outside of any thunderstorms.
Strong Wind Strong Wind
Measured wind gust at KMWA in Marion.
Hail Hail
An extended period of hail occurred at Cambria with initial hailstones measured to one inch increasing in size to golf ball as the supercell storm continued eastward.
Hail Hail
Hail estimated at half dollar size fell at WSIL.
Hail Hail
Hail measured to nickel size occurred on the south side of Marion as a supercell storm tracked eastward.
Dense Fog Dense Fog
Hail Hail
Hail to the size of quarters fell in Carterville.
Hail Hail
Hail to the size of quarters fell in a swath from near the intersection of Highway 148 and Highway 13 east southeast through the south side of Marion.
Hail Hail
Hail up to the size of nickels fell in Crainville.
Hail Hail
Ping pong ball size hail fell near Bush.
Hail Hail
Nickel size hail fell near Blairsville.
Strong Wind Strong Wind
Strong Wind Strong Wind
Strong Wind Strong Wind
Strong Wind Strong Wind
Strong Wind Strong Wind
Strong Wind Strong Wind
Cold/Wind Chill Cold/Wind Chill
Heavy Snow Heavy Snow
Winter Weather Winter Weather
Dense Fog Dense Fog
Events by year
| Year | Events | Tornadoes |
|---|---|---|
| 2025 | 42 | 1 |
| 2024 | 51 | 4 |
| 2023 | 38 | 0 |
| 2022 | 33 | 0 |
| 2021 | 24 | 0 |
| 2020 | 23 | 0 |
| 2019 | 31 | 0 |
| 2018 | 41 | 4 |
| 2017 | 36 | 2 |
| 2016 | 38 | 0 |
| 2015 | 31 | 0 |
| 2014 | 28 | 1 |
| 2013 | 24 | 1 |
| 2012 | 43 | 1 |
| 2011 | 42 | 0 |
| 2010 | 31 | 0 |
| 2009 | 35 | 1 |
| 2008 | 29 | 0 |
| 2007 | 25 | 0 |
| 2006 | 24 | 0 |
| 2005 | 18 | 0 |
| 2004 | 19 | 1 |
| 2003 | 6 | 0 |
| 2002 | 13 | 0 |
| 2001 | 18 | 0 |
| 2000 | 20 | 0 |
| 1999 | 22 | 0 |
| 1998 | 18 | 1 |
| 1997 | 8 | 0 |
| 1996 | 20 | 0 |
| 1995 | 4 | 0 |
| 1994 | 1 | 0 |
| 1993 | 1 | 0 |
| 1992 | 5 | 0 |
| 1991 | 1 | 1 |
| 1990 | 2 | 0 |
| 1989 | 1 | 0 |
| 1986 | 1 | 0 |
| 1984 | 1 | 0 |
| 1983 | 4 | 0 |
| 1982 | 3 | 1 |
| 1980 | 2 | 0 |
| 1977 | 2 | 0 |
| 1976 | 1 | 0 |
| 1975 | 3 | 0 |
| 1974 | 2 | 0 |
| 1973 | 1 | 1 |
| 1971 | 1 | 0 |
| 1970 | 2 | 0 |
| 1968 | 1 | 1 |
| 1966 | 2 | 0 |
| 1957 | 1 | 1 |