Severe Thunderstorm Warning Issued for Northwestern Iowa
This alert is no longer in effect.
NOAA issued it on July 18, 2026, 5 weeks 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.
NWS Sioux Falls has issued a Severe Thunderstorm Warning for eight Iowa counties until 6:45 PM CDT June 17 due to radar-indicated storms with 60 mph winds.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Northwestern Iowa
- Issued
- July 18, 2026
- Issuing authority
- NWS Sioux Falls SD
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 5 weeks ago; use the issuing agency's live warning service for current conditions in Northwestern Iowa.
Alert Details
A Severe Thunderstorm Warning (SVR) was issued by the National Weather Service Sioux Falls SD on behalf of NOAA. The alert is effective from 5:54 PM CDT June 17, 2026, until 6:45 PM CDT June 17, 2026.
Affected Areas
The warning covers Buena Vista County, Cherokee County, Clay County, Dickinson County, O'Brien County, Osceola County, Plymouth County, and Sioux County in northwestern Iowa. Specific impacts are noted for eastern Sioux County and eastern Plymouth County.
What You Should Do
Residents should move to an interior room on the lowest floor of a building for protection.
Expected Conditions
At 5:54 PM CDT, severe thunderstorms were located along a line extending from near Round Lake to near Paullina to near Merrill, moving southeast at 65 mph. Hazards include 60 mph wind gusts capable of damaging roofs, siding, and trees. Hail up to 0.75 inches is possible.
Timeline
The warning is in effect from 5:54 PM CDT until 6:45 PM CDT on June 17, 2026. Severe thunderstorms are expected near Le Mars, Hartley, Remsen, Marcus, Lake Park, Paullina, Primghar, Merrill, Sutherland, and Ocheyedan around 6:00 PM CDT, with additional locations affected shortly thereafter.
Original source: NOAA Official Notice ↗
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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
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Similar severity timing
Same severity (high) notices issued closest in time to July 18, 2026.
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