Severe Thunderstorm Warning Issued for Harrison and Monona Counties in Iowa, Washington County in Nebraska
This alert is no longer in effect.
NOAA issued it on May 23, 2026, 3 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 has issued a Severe Thunderstorm Warning for parts of Iowa and Nebraska until 11:15 PM CDT on May 15.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Western Iowa and Eastern Nebraska
- Issued
- May 23, 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 3 months ago; use the issuing agency's live warning service for current conditions in Western Iowa and Eastern Nebraska.
Alert Details
A Severe Thunderstorm Warning has been issued by the National Weather Service Omaha/Valley NE. The alert is effective from May 15 at 10:25 PM CDT until May 15 at 11:15 PM CDT.
Affected Areas
The warning covers Southeastern Monona County in west central Iowa, Northern Harrison County in southwestern Iowa, and North central Washington County in east central Nebraska.
What You Should Do
For your protection move to an interior room on the lowest floor of a building.
Expected Conditions
At 10:25 PM CDT, a severe thunderstorm was located 6 miles west of Dunlap, or 20 miles southwest of Denison, moving east at 35 mph. Hazards include 60 mph wind gusts and quarter size hail.
Timeline
The warning is in effect until 11:15 PM CDT on May 15, 2026.
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 (778 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to May 23, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.