Severe Thunderstorm Warning for Harrison and Monona Counties, IA
This alert is no longer in effect.
NOAA issued it on May 27, 2026, 2 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.
NWS Omaha/Valley NE issued a Severe Thunderstorm Warning for eastern Harrison County and southeastern Monona County in Iowa until 9:15 PM CDT.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Western Iowa
- Issued
- May 27, 2026
- Issuing authority
- NWS Omaha/Valley NE
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 2 months ago; use the issuing agency's live warning service for current conditions in Western Iowa.
Alert Details
Severe Thunderstorm Warning issued by NWS Omaha/Valley NE. Effective from 2026-05-17T20:42:00-05:00 until 2026-05-17T21:15:00-05:00. Alert type code: SVROAX.
Affected Areas
Eastern Harrison County in southwestern Iowa and southeastern Monona County in west central Iowa.
What You Should Do
For your protection move to an interior room on the lowest floor of a building.
Expected Conditions
At 8:42 PM CDT, severe thunderstorms were located along a line extending from 2 miles southwest of Moorhead to 6 miles east of Pisgah to 5 miles east of Logan, moving east at 40 mph. Hazards include 70 mph wind gusts and quarter size hail. A mesonet station reported 65 mph wind gust near Missouri Valley, IA at 8:33 PM.
Timeline
Alert effective immediately on 2026-05-17T20:42:00-05:00 and expires 2026-05-17T21:15:00-05:00.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
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 (848 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to May 27, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.