Severe Thunderstorm Warning for Calhoun County, Illinois and Missouri Counties
This alert is no longer in effect.
NOAA issued it on April 17, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
A Severe Thunderstorm Warning is in effect for Calhoun County in Illinois and parts of Lincoln, St. Charles, and Warren Counties in Missouri until 4:00 PM CDT, featuring 60 mph wind gusts and quarter-sized hail.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Southwestern Illinois and East Central Missouri
- Issued
- April 17, 2026
- Issuing authority
- NWS St Louis MO
Storm notices can cover different combinations of wind, hail, lightning, and rainfall. Use the original notice for the hazards and boundaries attached to this specific record.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Southwestern Illinois and East Central Missouri.
Alert Details
A Severe Thunderstorm Warning has been issued by NWS St Louis MO, effective from 3:10 PM CDT on April 17, 2026.
Affected Areas
The warning affects Calhoun County in southwestern Illinois; Lincoln County, St. Charles County, and Warren County in east central Missouri. Specific locations include Innsbrook, New Melle, Wright City, Wentzville, Foristell, Lake St. Louis, Flint Hill, Josephville, O'Fallon, St. Paul, Moscow Mills, Troy, Chain of Rocks, Fountain N' Lakes, Old Monroe, Winfield, Brussels, Foley, and Batchtown. This includes Cuivre River State Park and Interstate 70 in Missouri between exits 199 and 216.
What You Should Do
Seek shelter inside a well-built structure and stay away from windows, as this storm is capable of producing damaging winds and large hail.
Expected Conditions
Hazards include 60 mph wind gusts and quarter size hail (1.00 inch), which could cause hail damage to vehicles and wind damage to roofs, siding, and trees.
Timeline
The warning is effective from 3:10 PM CDT to 4:00 PM CDT on April 17, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,070 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 17, 2026.
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