McHenry County IL Tornado Warnings — Live Alerts & History
Illinois · updates automatically
Active Tornado Warnings
No active tornado warnings for McHenry County right now
This page updates automatically — new NWS tornado warnings for the county appear here within about a minute of issuance.
Tornado History for McHenry County (Since 1950)
Tornadoes on Record
23
1950–present · NOAA/SPC
Violent (EF3+)
2
8.7% of total
Fatalities
7
176 injuries
Strongest Rating
F4
Fujita / Enhanced Fujita
Most Recent
July 12, 2023
Latest tornado on record
Recent Tornado Warning History
| Date | Issued | Expired |
|---|---|---|
| April 18, 2026 | 1:36 AM UTC | 2:15 AM UTC |
| April 18, 2026 | 12:28 AM UTC | 1:15 AM UTC |
| April 3, 2026 | 12:40 AM UTC | 1:15 AM UTC |
McHenry County Facts
- FIPS Code
- 17111
- NWS County Code (UGC)
- ILC111
More for McHenry County
Recent warning events
Active warnings come from the National Weather Service and refresh on
this page about once a minute. Tornado climatology is computed from the
NOAA/SPC storm events archive (1950–present). VORTEX is not a substitute
for official NWS warnings or a NOAA Weather Radio.