Full storm history reportKnow the Storm Risk Before It Becomes Expensive Damage.Get a full report of past flood, hail, and tornado events at any address.
Get full report

Tornado History

Cass Tornado History

This county-level tornado history page focuses on Cass, Iowa. The records below identify 40 tornadoes from 1956 through 2024, including a highest listed rating of F3 (Severe damage). NOAA damage estimates in this group total at least $5.4M, with 0 deaths and 10 injuries recorded across the listed events.

Key Tornado Statistics

Total Tornadoes40
Total Deaths0
Total Injuries10
Property Damage$5.4M
Avg Length3.0 mi
Avg Width109 yd

Want to check tornado history for a specific address?Use the address lookup to see nearby historical tornado tracks, dates, ratings, and distance from the location.

Check any address

Key Tornado Facts for Cass, Iowa

Top local patterns from the historical tornado records in this group.

Average 0.6 tornadoes per year (1.1/yr in last decade)
June is the peak tornado month with 13 recorded events
Deadliest tornado: F2 in Cass, Iowa with 0 deaths
2024 was the most active year with 5 tornadoes
The 2020s had the most tornado activity (9 events)
Longest tornado: 23 miles in Cass, Iowa
Widest tornado: 1,000.0 yards in Cass, Iowa
Most tornadoes in one day: 4 on Jun 28, 2024

Monthly Distribution

Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.

January
February
March
April
May
June
July
August
September
October
November
December

Summary: In Cass, Iowa, June is the most active month with 13 tornadoes.

Annual Tornado Trend

Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.

5420

Summary: 2024 was the most active year with 5 recorded tornadoes.

Tornado Intensity Distribution

Shows the breakdown of tornadoes by EF/F rating.

F0
EF0
F1
EF1
F2
EF2
F3
EFU

Summary: F1 tornadoes are the most common in this group, with 10 recorded events.

Property Damage Trends

Visualizes reported property damage over time. Bars use a log-like scale so very large damage years do not flatten the rest of the chart.

$2.5M$250K$25K$0

Summary: The highest reported property damage year in this group is 1984 with at least $2.5M in NOAA-listed property damage.

Historical Track Sketch

F3 April 8, 19991999F3 April 20, 19641964F2 June 7, 19841984EF2 May 6, 20072007EF2 December 15, 20212021F2 April 18, 19631963F2 August 27, 19641964F2 June 13, 19761976F2 May 29, 19561956F1 June 23, 19851985F1 June 12, 19901990EF1 March 22, 20112011F1 May 8, 20042004F1 May 21, 19981998F1 April 12, 1964F1 July 27, 1979F1 July 4, 1980F1 March 29, 1981EF1 April 16, 2024EF1 May 22, 2019F1 May 31, 1987F1 March 18, 1979EF0 March 23, 2009EF0 December 15, 2021EF0 March 23, 2009EF0 July 12, 2023F0 June 12, 1990F0 May 18, 2000EF0 June 28, 2024F0 July 15, 1992F0 May 23, 1981F0 June 23, 1985F0 June 23, 1985EF0 June 5, 2008EF0 June 7, 2009EF0 July 12, 2023EFU July 16, 2019EFU June 28, 2024EFU June 28, 2024EFU June 28, 2024© OpenStreetMap contributors

Notable Tornado Records

The table highlights the strongest and most damaging records in this page's local dataset. Damage totals are NOAA-reported minimum estimates where available.

DateRatingAreaLengthWidthDeathsInjuriesMin. property damage
April 8, 1999F3Cass, Iowa7.5 mi1000 yd00$186K
April 20, 1964F3Cass, Iowa6.1 mi350 yd01$25K
June 7, 1984F2Cass, Iowa23 mi150 yd08$2.5M
May 6, 2007EF2Cass, Iowa7.43 mi830 yd00$1.0M
December 15, 2021EF2Cass, Iowa13.71 mi100 yd00$300K
April 18, 1963F2Cass, Iowa0 mi200 yd00$25K
August 27, 1964F2Cass, Iowa1 mi50 yd00$25K
June 13, 1976F2Cass, Iowa8.5 mi100 yd00$25K
May 29, 1956F2Cass, Iowa3.3 mi50 yd00$250
June 23, 1985F1Cass, Iowa1.5 mi50 yd01$250K
June 12, 1990F1Cass, Iowa1 mi30 yd00$250K
March 22, 2011EF1Cass, Iowa2.84 mi250 yd00$150K

Want to check a home, business, or exact property?Search any address to compare nearby historical tornado tracks against that specific location.

Check any address

Related Location Pages

Address-level storm reportGet flood, hail, and tornado history for any property.PastStorms turns historical storm data into a focused report before damage becomes an expensive surprise.
Visit PastStorms

Source And Limits

Data source: NOAA/NCEI. TornadoTrace summarizes historical records for screening and research. Coordinates, damage estimates, narratives, and event details can be approximate, incomplete, revised, or missing. Do not use this page as legal, insurance, engineering, real estate, emergency management, or safety advice.