Williamson County, Illinois
Tornadoes, hail, floods and severe storms recorded here between 1957 and 2026, from NOAA's Storm Events Database. Search an address to see which tornadoes came closest to it.
22
Tornado reports
120
Hail reports
68
Floods since 1996
892
All events
13
Deaths
$497.8M
Property damage
Tornado paths in Williamson County
The part of each tornado’s path NOAA recorded in this county, 22 in all. Zoom in and the paths widen to their surveyed width.
EF0EF1EF2EF3EF4EF5Unrated
Year by year
All storm eventsTornadoes
NOAA's storm database records tornadoes back to 1950 and hail and thunderstorm wind back to 1955, but floods only from 1996 on. Older floods are missing here. For those, the U.S. Geological Survey's stream gauge records and flood reports are the place to look.
Most significant events
The strongest tornadoes, deadliest events and biggest damage here, up to 50.
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…
Thunderstorm Wind Thunderstorm Wind
A powerful thunderstorm moving eastward caused tree limbs to be down along with minor roof damage to homes and an outbuilding in the Forest Park neighborhood of Herrin.
Thunderstorm Wind Thunderstorm Wind
A surging portion of a storm line caused damage along Cedar Grove Rd north of Marion. Multiple trees were snapped or uprooted. Shingle damage occurred to homes and buildings. A play set was torn up and parts of fences downed.
Dense Fog Dense Fog
Strong Wind Strong Wind
Strong Wind Strong Wind
Large tree limb down.
Dense Fog Dense Fog
Cold/Wind Chill Cold/Wind Chill
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Heavy Snow Heavy Snow
Cold/Wind Chill Cold/Wind Chill
Strong Wind Strong Wind
Strong Wind Strong Wind
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.
Events by year, as a table
| Year | Events | Tornadoes |
|---|---|---|
| 2026 | 12 | 0 |
| 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 | 15 | 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 |
Search your address
See every tornado that passed within 25 miles of a place in Williamson County, measured to its path.
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