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Tornado History
De Kalb Tornado History
This county-level tornado history page focuses on De Kalb, Illinois. The records below identify 27 tornadoes from 1959 through 2024, including a highest listed rating of EF3 (Severe damage). NOAA damage estimates in this group total at least $8.3M, with 2 deaths and 12 injuries recorded across the listed events.
Key Tornado Statistics
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Check any addressKey Tornado Facts for De Kalb, Illinois
Top local patterns from the historical tornado records in this group.
Average 0.4 tornadoes per year (1.4/yr in last decade)
August is the peak tornado month with 7 recorded events
Deadliest tornado: EF3 in De Kalb, Illinois with 2 deaths
2021 was the most active year with 6 tornadoes
The 2020s had the most tornado activity (14 events)
Longest tornado: 9.99 miles in De Kalb, Illinois
Widest tornado: 700.0 yards in De Kalb, Illinois
Most tornadoes in one day: 5 on Aug 9, 2021
Monthly Distribution
Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.
Summary: In De Kalb, Illinois, August is the most active month with 7 tornadoes.
Annual Tornado Trend
Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.
Summary: 2021 was the most active year with 6 recorded tornadoes.
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.
Summary: The highest reported property damage year in this group is 2015 with at least $8.0M in NOAA-listed property damage.
Historical Track Sketch
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.
| Date | Rating | Area | Length | Width | Deaths | Injuries | Min. property damage |
|---|---|---|---|---|---|---|---|
| April 9, 2015 | EF3 | De Kalb, Illinois | 4.83 mi | 700 yd | 2 | 11 | $8.0M |
| June 18, 1975 | F2 | De Kalb, Illinois | 4.7 mi | 27 yd | 0 | 1 | $250K |
| July 10, 1959 | F1 | De Kalb, Illinois | 1 mi | 60 yd | 0 | 0 | $25K |
| April 21, 1967 | F1 | De Kalb, Illinois | 2 mi | 40 yd | 0 | 0 | $25K |
| June 12, 2013 | EF1 | De Kalb, Illinois | 2.27 mi | 100 yd | 0 | 0 | $20K |
| April 9, 2015 | EF1 | De Kalb, Illinois | 1.8 mi | 100 yd | 0 | 0 | $5K |
| August 9, 2021 | EF1 | De Kalb, Illinois | 1.8 mi | 80 yd | 0 | 0 | N/A |
| August 9, 2021 | EF1 | De Kalb, Illinois | 1.5 mi | 150 yd | 0 | 0 | N/A |
| May 18, 1982 | F0 | De Kalb, Illinois | 0 mi | 33 yd | 0 | 0 | N/A |
| June 6, 1996 | F0 | De Kalb, Illinois | 2 mi | 20 yd | 0 | 0 | N/A |
| May 10, 2001 | F0 | De Kalb, Illinois | 0.1 mi | 20 yd | 0 | 0 | N/A |
| June 10, 2003 | F0 | De Kalb, Illinois | 0.5 mi | 50 yd | 0 | 0 | N/A |
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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.