Severe Thunderstorm Warning Issued for Black Hawk, Bremer, Butler Counties IA
This alert is no longer in effect.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 Des Moines has issued a Severe Thunderstorm Warning for northern Black Hawk, southern Bremer, and east central Butler counties in Iowa until 11:00 PM CDT.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Northeastern Iowa
- Issued
- May 23, 2026
- Issuing authority
- NWS Des Moines IA
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 Northeastern Iowa.
Alert Details
A Severe Thunderstorm Warning (SVR) has been issued by the National Weather Service in Des Moines IA. The alert is effective from May 15, 2026 at 10:14 PM CDT until May 15, 2026 at 11:00 PM CDT.
Affected Areas
The warning covers Northern Black Hawk County, Southern Bremer County, and East central Butler County in Iowa. Locations impacted include Waterloo, Cedar Falls, Waverly, Denver, Shell Rock, Waterloo Municipal Airport, Janesville, Dunkerton, Readlyn, and Waverly Municipal Airport.
What You Should Do
For your protection move to an interior room on the lowest floor of a building.
Expected Conditions
At 10:13 PM CDT, a severe thunderstorm was located near Janesville or near Waverly, moving east at 55 mph. Hazards include 60 mph wind gusts and penny size hail (0.75 inch). Expect damage to roofs, siding, and trees.
Timeline
The warning is in effect until 11:00 PM CDT on May 15, 2026.
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
Nearest notices by article body length (929 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to May 23, 2026.
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