Severe Thunderstorm Watch

Locations Affected

Des Moines, IA ∙ West Des Moines, IA ∙ Ames, IA ∙ Norwood, IA ∙ State Center, IA ∙ Sully, IA ∙ Oskaloosa Municipal Airport, IA ∙ Johnston, IA ∙ Chelsea, IA ∙ Conrad, IA

Full Alert Message

WATCH COUNTY NOTIFICATION FOR WATCHES 580/581 NATIONAL WEATHER SERVICE DES MOINES IA 755 AM CDT THU AUG 13 2026 Severe thunderstorm watch 581 remains valid until 11 AM CDT this morning for the following areas in iowa this watch includes 14 counties in central iowa grundy jasper marshall polk poweshiek story tama in south central iowa clarke lucas mahaska marion monroe warren in southeast iowa wapello this includes the cities of albia, ames, carlisle, chariton, conrad, des moines, dike, dysart, gladbrook, grinnell, grundy center, indianola, knoxville, marshalltown, newton, norwalk, osceola, oskaloosa, ottumwa, pella, reinbeck, tama, toledo, traer, and wellsburg. * primary threats include... scattered damaging winds likely with isolated significant gusts to 75 mph possible. isolated large hail events to 1 inch in diameter possible. a tornado or two possible.

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