| Event | Severe Thunderstorm Warning |
| Severity | Severe |
| Urgency | Immediate |
| Certainty | Observed |
| Area | Boone, IA; Story, IA |
| Effective | 7/20/2026, 6:34:00 PM CDT |
| Expires | 7/20/2026, 7:00:00 PM CDT |
Severe Thunderstorm Warning issued July 20 at 6:34PM CDT until July 20 at 7:00PM CDT by NWS Des Moines IA
Details
SVRDMX
The National Weather Service in Des Moines has issued a
* Severe Thunderstorm Warning for…
Southwestern Story County in central Iowa…
Southeastern Boone County in central Iowa…
* Until 700 PM CDT.
* At 634 PM CDT, a severe thunderstorm was located over Slater, or 9
miles southwest of Ames, moving south at 30 mph.
HAZARD…60 mph wind gusts and nickel size hail.
SOURCE…Radar indicated.
IMPACT…Expect damage to roofs, siding, and trees.
* Locations impacted include…
Ames, Huxley, Madrid, Slater, Woodward, Sheldahl, Kelley, and
Luther.
Instructions
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 1000 PM CDT for central Iowa.
This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.
More Stories
⚠️ Heat Advisory – Moore; Hutchinson – Tuesday, July 21, 2026
⚠️ Tropical Cyclone Local Statement – Vernon; Rapides; Avoyelles; Beauregard; Allen; Evangeline; St. Landry; Lafayette; Upper St. Martin; Lower St. Martin; West Cameron; East Cameron; Northern Calcasieu; Northern Jefferson Davis; Northern Acadia; Upper Vermilion; Upper Iberia; Upper St. Mary; Southern Calcasieu; Southern Jefferson Davis; Southern Acadia; Lower Vermilion; Lower Iberia; Lower St. Mary; Tyler; Hardin; Northern Jasper; Northern Newton; Southern Jasper; Southern Newton; Upper Jefferson; Northern Orange; Lower Jefferson; Southern Orange – Tuesday, July 21, 2026
⚠️ Special Weather Statement – Inland Kenedy; Inland Willacy; Inland Cameron; Coastal Kenedy; Coastal Willacy; Coastal Cameron – Tuesday, July 21, 2026