Cass County, Iowa
Tornadoes, hail, floods and severe storms recorded here between 1956 and 2025, from NOAA's Storm Events Database. Search an address to see which tornadoes came closest to it.
40
Tornado reports
174
Hail reports
51
Floods since 1996
724
All events
1
Deaths
$36.7M
Property damage
Tornado paths in Cass County
The part of each tornado’s path NOAA recorded in this county, 40 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 F3 Tornado
Funnel Cloud Funnel Cloud
News media KJAN has several pictures of funnel clouds near Atlantic, Anita, and Massena from Sunday evening.
Thunderstorm Wind Thunderstorm Wind
Wind gust measured on a PWS in southwest Cass County.
Thunderstorm Wind Thunderstorm Wind
Large, old tree down in Massena. Damage to electrical conduit on side of building. Images submitted via social media. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
Numerous large tree limbs down up to 4 inches in diameter. Relayed by KJAN radio.
Thunderstorm Wind Thunderstorm Wind
Strong wind gusts reported in Atlantic, with medium to large sized tree branches down blocking multiple roads. Pea-sized hail was observed at times, with heavy rain causing near zero visibility.
Hail Hail
Multiple hail sizes observed with largest up to ping pong ball sized.
Thunderstorm Wind Thunderstorm Wind
Branches down, along with hail up to nickel sized.
Hail Hail
High Wind High Wind
Thunderstorm Wind Thunderstorm Wind
Report was delayed.
High Wind High Wind
Blizzard Blizzard
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Winter Weather Winter Weather
Snow Squall.
Drought Drought
Widespread rainfall of 1 to 2 inches over the past week helped to end the Severe Drought conditions across Cass County.
Drought Drought
Severe Drought expanded into Cass County as dry fall conditions persisted along with above normal temperatures.
Thunderstorm Wind Thunderstorm Wind
AWOS station KAIO with gusts over 50 mph for at least 10 minutes.
Funnel Cloud Funnel Cloud
Brief funnel cloud, however chaser reported structure becoming more ragged with time.
Tornado EFU Tornado
This tornado was observed by storm chasers and remained in rural cropland. No damage indicators were impacted, hence the EFU rating.
Tornado EF0 Tornado
This weak tornado remained mostly in rural farmland but did impact some trees with minor damage.
Tornado EFU Tornado
No damage indicators were impacted, hence the EFU rating as the tornado remained in rural cropland.
Tornado EFU Tornado
This tornado remained in rural cropland. No damage indicators were impacted, hence the EFU rating.
Heavy Rain Heavy Rain
A 24 hour rain total of 3.07 inches.
Thunderstorm Wind Thunderstorm Wind
Time of occurrence estimated from radar.
Hail Hail
Trained spotter reported quarter sized hail.
Thunderstorm Wind Thunderstorm Wind
Emergency manager reported numerous power poles and branches down throughout town. Time estimated from radar, this was a delayed report.
Thunderstorm Wind Thunderstorm Wind
Hail Hail
Delayed report, time estimated by radar.
Tornado EF1 Tornado
Tornado developed in Lake Anita State Park producing EF1 tree damage. The tornado moved northwest through a small subdivision producing EF0 damage then crossed the Crestwood Hills Golf Course before dissipating.
Drought Drought
Rainfall in the middle and later portion of March helped to improve hydrologic conditions across Cass county by the end of the month with severe drought ending in the county.
Drought Drought
Above normal temperatures and below normal precipitation allowed severe drought conditions to persist across Cass county.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Winter Storm Winter Storm
Blizzard Blizzard
Winter Storm Winter Storm
Drought Drought
Severe drought persisted in Cass county during January with near normal temperatures and above normal precipitation. Extreme drought was no longer observed in the county by the end of the month. Longer term dryness kept from any further improvements.
Drought Drought
Severe to extreme drought conditions remained across Cass county in December with above normal temperatures. Rainfall was above normal but did little to alleviate drought conditions, particularly longer term deficits.
Drought Drought
Severe drought conditions persisted across Cass county for the duration of November given lack of rain and above normal temperatures.
Drought Drought
Severe drought conditons maintained a presence in Cass county during the month of October. Temperatures remained above normal during the month with near normal rainfall although longer range precipitation remains well below normal.
Drought Drought
Above normal temperatures and lack of precipitation allowed severe drought conditions to expand into portions of Cass county during the later half of September.
Drought Drought
Several rainfall events helped to improve drought and hydrologic conditions across Cass County in early August.
Tornado EF0 Tornado
Tornado was indicated by a Correlation Coefficient depression on radar and also verified through high resolution satellite imagery north of Marne. The tornado remained in mostly open cropland although some EF0 tree damage was done to a tree line along the edge of one of the field…
Events by year, as a table
| Year | Events | Tornadoes |
|---|---|---|
| 2025 | 14 | 0 |
| 2024 | 22 | 5 |
| 2023 | 13 | 2 |
| 2022 | 10 | 0 |
| 2021 | 20 | 2 |
| 2020 | 11 | 0 |
| 2019 | 24 | 2 |
| 2018 | 34 | 0 |
| 2017 | 19 | 0 |
| 2016 | 14 | 0 |
| 2015 | 13 | 0 |
| 2014 | 36 | 0 |
| 2013 | 11 | 0 |
| 2012 | 23 | 0 |
| 2011 | 23 | 1 |
| 2010 | 24 | 0 |
| 2009 | 26 | 3 |
| 2008 | 29 | 1 |
| 2007 | 37 | 1 |
| 2006 | 11 | 0 |
| 2005 | 13 | 0 |
| 2004 | 36 | 1 |
| 2003 | 24 | 0 |
| 2002 | 6 | 0 |
| 2001 | 45 | 0 |
| 2000 | 27 | 1 |
| 1999 | 14 | 1 |
| 1998 | 29 | 1 |
| 1997 | 13 | 0 |
| 1996 | 21 | 0 |
| 1995 | 3 | 0 |
| 1994 | 5 | 0 |
| 1992 | 5 | 1 |
| 1991 | 1 | 0 |
| 1990 | 3 | 2 |
| 1989 | 1 | 0 |
| 1988 | 3 | 0 |
| 1987 | 1 | 1 |
| 1986 | 10 | 0 |
| 1985 | 9 | 3 |
| 1984 | 6 | 1 |
| 1983 | 1 | 0 |
| 1981 | 4 | 2 |
| 1980 | 8 | 1 |
| 1979 | 3 | 2 |
| 1976 | 2 | 1 |
| 1975 | 2 | 0 |
| 1974 | 4 | 0 |
| 1971 | 2 | 0 |
| 1970 | 1 | 0 |
| 1969 | 1 | 0 |
| 1968 | 2 | 0 |
| 1964 | 3 | 3 |
| 1963 | 1 | 1 |
| 1956 | 1 | 1 |
Search your address
See every tornado that passed within 25 miles of a place in Cass County, measured to its path.
We couldn’t get your location. Check that location access is allowed for this site, or type an address.