Tornadoes in McHenry County
The Storm Prediction Center records 31 tornadoes whose paths touched McHenry County, Illinois between 1958 and 2024. They killed 32 people and injured 637. The busiest month is April, with 6 tornadoes. The strongest was an F4 on 21 April 1967. The most recent was on 7 May 2024.
- 31tornadoes
- 32deaths
- 637injuries
- 514per 10,000 sq mi of land
A tornado that crossed several counties counts in each one, so county counts add up to more than the state's.
How strong were the tornadoes in McHenry County?
| Rating | Tornadoes | Share |
|---|---|---|
| F0 / EF0 | 13 | 42% |
| F1 / EF1 | 8 | 26% |
| F2 / EF2 | 5 | 16% |
| F3 / EF3 | 1 | 3% |
| F4 / EF4 | 3 | 10% |
| F5 / EF5 | 0 | 0% |
| Unknown rating | 1 | 3% |
McHenry County tornadoes over time
The 2020s only run to 2024, so that bar is for a shorter period. The record starts in 1950.
Show the numbers
| Period | Count |
|---|---|
| 1950s | 2 |
| 1960s | 4 |
| 1970s | 3 |
| 1980s | 1 |
| 1990s | 5 |
| 2000s | 3 |
| 2010s | 6 |
| 2020s | 7 |
Show the numbers
| Period | Count |
|---|---|
| Jan | 1 |
| Feb | 0 |
| Mar | 1 |
| Apr | 6 |
| May | 4 |
| Jun | 5 |
| Jul | 6 |
| Aug | 4 |
| Sep | 0 |
| Oct | 2 |
| Nov | 2 |
| Dec | 0 |
Records for McHenry County
- Deadliest and Strongest: Woodstock, Illinois tornado21 April 1967, F4, 24 deaths, 450 injuries, 25.5 miles long
- Longest path: Illinois tornado8 October 1958, F2, 1 death, 81 miles long
- Most recent: Illinois tornado7 May 2024, EF0, 14.3 miles long
Notable tornadoes in McHenry County
- Woodstock, Illinois tornado21 April 1967, F4, 24 deaths, 450 injuries, 25.5 miles long
- Crystal Lake, Illinois tornado11 April 1965, F4, 6 deaths, 75 injuries, 9.1 miles long
- Carpentersville, Illinois tornado21 April 1967, F4, 1 death, 100 injuries, 8.8 miles long
Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.