Grant County, Wisconsin
Tornadoes, hail, floods and severe storms recorded here between 1954 and 2026, from NOAA's Storm Events Database. Search an address to see which tornadoes came closest to it.
56
Tornado reports
253
Hail reports
139
Floods since 1996
1,007
All events
3
Deaths
$70.4M
Property damage
Tornado paths in Grant County
The part of each tornado’s path NOAA recorded in this county, 56 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.
Tornado EF3 Tornado
A NWS storm survey confirmed that an EF3 tornado occurred across northern Grant County. The tornado started in Boscobel where damage to trees, power poles and power lines occurred. The tornado then moved east/southeast before dissipating south of Blue River. Along the path, six h…
The driver of a pickup failed to stop for a stop sign at an intersection along U.S. Highway 61 near Potosi, collided with a semi-truck and was thrown from the vehicle. According to the accident report, the driver was pronounced dead at the scene of the accident and that dense fog…
A tornado formed along a squall line west of Platteville, just south of County Road B, and traveled through Memorial Park on to the Univ. of Wisconsin - Platteville campus. Five people were injured, one of them seriously. There was extensive damage done to five buildings and the …
Very heavy rain produced flash flooding across the northeast part of Grant County. In Boscobel, numerous houses became surrounded by water with evacuations needed, most streets were flooded and cars were under water. 650 homes were impacted by the flood waters with two dozen fami…
The Grant County Emergency Manager reported that U.S. Highway 151 was closed at the SW Road interchange. County Road B was also closed for a while. County Road O sustained substantial damage and was likely closed for around a week. County Road U sustained shoulder damage. Water w…
Large hail was reported on Borah Ridge Road.
A major flash flood hit Grant County during the afternoon of June 12th impacting the communities of Lancaster, Potosi, Tennyson, Ellenboro, and other rural areas. Numerous rescues were performed from people trapped in cars, especially in the Potosi area where terrain enhanced the…
Highways 35 and 18 were closed due to mudslides and debris. Trees were even being knocked down by the slides.
Flash flood waters backed up in town as debris blocked area bridges. The water was three to four feet deep in places and propane gas containers began floating on the Mississippi River. Property damage in town was extensive.
Excessive Heat Excessive Heat
A period of extreme heat moved into the region during the end of June with widespread heat indices over 100 degrees. On June 29th, heat indices ranged from 102 to 107 degrees across the county during the afternoon and early evening. The highest heat index observed in the county w…
Hail Hail
The public reported quarter sized hail 1 mile northeast of Five Points.
Tornado EF1 Tornado
This tornado developed southeast of Boscobel with generally a weak damage path throughout its duration. The tornado was primarily responsible for tree and farm outbuilding damage along its path with some pockets of more significant damage to trees and outbuildings resulting the E…
Thunderstorm Wind Thunderstorm Wind
Emergency management reported a 60 mph wind gust in Kieler.
Thunderstorm Wind Thunderstorm Wind
Emergency management reported a 61 mph wind gust 1 mile northeast of Potosi.
Thunderstorm Wind Thunderstorm Wind
The AWOS at Platteville Municipal Airport reported a 60 mph wind gust.
Thunderstorm Wind Thunderstorm Wind
The AWOS at Platteville Municipal Airport reported a 68 mph wind gust.
Thunderstorm Wind Thunderstorm Wind
Emergency management reported trees down and sign damage 1 mile south-southeast of Lancaster.
Thunderstorm Wind Thunderstorm Wind
Fire department and rescue reported a 64 mph wind gust 1 mile north of Annaton.
Thunderstorm Wind Thunderstorm Wind
Emergency management reported an 85 mph wind gust in Livingston.
Thunderstorm Wind Thunderstorm Wind
A trained spotter reported a 74 mph wind gust 3 miles west of Livingston.
Thunderstorm Wind Thunderstorm Wind
The public reported a large tree uprooted near Dickeyville. The report was relayed via social media.
Thunderstorm Wind Thunderstorm Wind
Emergency management reported downed trees causing some roof damage to a house in Kieler.
Thunderstorm Wind Thunderstorm Wind
A home weather station measured a 72 mph wind gust 2 miles south of Lancaster Airport.
Thunderstorm Wind Thunderstorm Wind
A trained spotter reported a 61 mph wind gust 2 miles west-southwest of Arthur.
Thunderstorm Wind Thunderstorm Wind
A trained spotter reported a 61 mph wind gust 2 miles north of Livingston.
Flood Flood
Heavy rainfall from multiple rounds of thunderstorms during the middle of April resulted in the Wisconsin River at Muscoda rising into flood stage during the early morning hours on April 18th. The river crested in minor flood stage on April 19th during the early morning before fa…
Hail Hail
Emergency management reported nickel sized hail at the Sheriff's office southeast of Lancaster.
Thunderstorm Wind Thunderstorm Wind
Emergency management reported a hog barn damaged 3 miles west-southwest of Montfort.
Hail Hail
The public reported quarter sized hail 3 miles west-southwest of Werley.
Hail Hail
A trained spotter reported quarter sized hail in Patch Grove.
Hail Hail
The public reported 2 inch diameter hail near Mount Hope. The report was relayed via social media.
Hail Hail
The public reported dime sized hail near Montfort. This report was relayed via mPING.
Thunderstorm Wind Thunderstorm Wind
Emergency management reported a 70 mph gust 2 miles west-southwest of Fairplay.
Winter Storm Winter Storm
The combination of gusty winds and falling snow resulted in a period of near-whiteout conditions across Grant County during the evening on March 15th through the morning hours on March 16th. Additionally, snowfall totals across the county ranged between 2 to 6 inches with the hig…
High Wind High Wind
Sustained winds of 25 to 35 mph were common in Grant County during the morning hours on March 13th with gusts up to 60 mph. The highest gust was at the airport in Platteville which measured a gust of 60 mph.
Hail Hail
The public reported quarter sized hail roughly 2 miles east of Cornelia.
Winter Weather Winter Weather
This snow band brought snowfall totals ranging from 1 to 4 inches across Grant County. The highest reported total was in Bagley where 4 inches was measured.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
A period of extreme cold moved into the region beginning on January 22nd and continued into January 23rd. During this period extremely cold wind chills of around 30 to 45 degrees below occurred in Grant County with the coldest observed wind chill being 42 degrees below zero at Pl…
Winter Storm Winter Storm
This winter storm brought between 9 and 13 inches of snowfall to Grant County over the course of November 29th and 30th. The highest snowfall report in the county was in Lancaster where 13 inches was observed.
Hail Hail
A storm chaser reported 2 inch diameter hail 2 mile south of Montfort.
Hail Hail
Emergency management reported quarter sized hail 1 mile north of Montfort. The report was relayed via NWS Chat.
Flood Flood
Heavy rainfall during the middle of August allowed the Platte River of Rockville to rise into flood stage during the evening hours on August 19th. The river then rose to a crest of 10.20 ft in minor flood stage before falling below flood stage during the morning hours on August 2…
Events by year, as a table
| Year | Events | Tornadoes |
|---|---|---|
| 2026 | 29 | 1 |
| 2025 | 29 | 0 |
| 2024 | 34 | 2 |
| 2023 | 22 | 0 |
| 2022 | 10 | 0 |
| 2021 | 24 | 1 |
| 2020 | 24 | 2 |
| 2019 | 40 | 0 |
| 2018 | 34 | 2 |
| 2017 | 60 | 0 |
| 2016 | 21 | 0 |
| 2015 | 25 | 0 |
| 2014 | 40 | 3 |
| 2013 | 30 | 1 |
| 2012 | 28 | 1 |
| 2011 | 31 | 0 |
| 2010 | 32 | 0 |
| 2009 | 58 | 1 |
| 2008 | 53 | 2 |
| 2007 | 36 | 5 |
| 2006 | 22 | 0 |
| 2005 | 10 | 1 |
| 2004 | 10 | 0 |
| 2003 | 20 | 0 |
| 2002 | 18 | 0 |
| 2001 | 26 | 0 |
| 2000 | 43 | 0 |
| 1999 | 14 | 0 |
| 1998 | 33 | 1 |
| 1997 | 20 | 0 |
| 1996 | 6 | 1 |
| 1995 | 13 | 0 |
| 1994 | 5 | 0 |
| 1991 | 4 | 1 |
| 1990 | 3 | 0 |
| 1989 | 6 | 0 |
| 1988 | 8 | 7 |
| 1987 | 1 | 0 |
| 1985 | 4 | 2 |
| 1984 | 6 | 0 |
| 1983 | 6 | 0 |
| 1981 | 1 | 0 |
| 1980 | 3 | 1 |
| 1979 | 2 | 0 |
| 1978 | 5 | 0 |
| 1977 | 6 | 0 |
| 1976 | 2 | 0 |
| 1975 | 6 | 0 |
| 1974 | 7 | 0 |
| 1973 | 5 | 1 |
| 1972 | 2 | 2 |
| 1971 | 7 | 6 |
| 1970 | 3 | 2 |
| 1969 | 7 | 5 |
| 1968 | 1 | 0 |
| 1967 | 2 | 1 |
| 1966 | 3 | 1 |
| 1965 | 1 | 0 |
| 1962 | 1 | 0 |
| 1959 | 2 | 1 |
| 1958 | 1 | 0 |
| 1957 | 1 | 1 |
| 1954 | 1 | 1 |
Search your address
See every tornado that passed within 25 miles of a place in Grant County, measured to its path.
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