Iowa Severe Thunderstorm Warning Severe | Effective 05-17-2026 18:26

Headline: 
Severe Thunderstorm Warning issued May 17 at 8:26PM CDT until May 17 at 9:15PM CDT by NWS Des Moines IA
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
May 17, 2026 - 6:26pm
Expires: 
May 17, 2026 - 7:15pm
Description: 
At 825 PM CDT, a severe thunderstorm was located near Galva, or 11 miles southwest of Storm Lake, and is nearly stationary. THIS IS A DESTRUCTIVE STORM!. HAZARD...80 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be heavily damaged. Expect considerable damage to roofs, windows, and vehicles. Extensive tree damage and power outages are likely. Locations impacted include... Emmetsburg, Sac City, Pocahontas, Rockwell City, Lake City, Manson, Laurens, Lake View, Odebolt, Five Island Lake, Black Hawk Lake, North Twin Lake, South Twin Lake, Silver Lake, Rush Lake, Wall Lake, Schaller, Ruthven, Pomeroy, and Fonda.
Instruction: 
A Tornado Watch remains in effect until 100 AM CDT for northwestern Iowa. A Tornado Watch also remains in effect until 300 AM CDT for west central Iowa. For your protection move to an interior room on the lowest floor of a building. This is a DANGEROUS SITUATION. This storm is producing widespread wind damage!. SEEK SHELTER NOW inside a sturdy structure and stay away from windows.
SNM:TORMENTA DE VIENTO DESTRUCTIVA en esta area hasta 915 PM CDT. Tome refugio ahora
Servicio Nacional de Meteorologia: AVISO DE TORMENTA SEVERA en efecto para esta area hasta las 9:15 PM CDT por vientos DESTRUCTIVOS de 80 mph. Tome refugio en un edificio, alejado de las ventanas. Escombros arrastrados por el viento podrian ser mortales para aquellos que se encuentran sin refugio.
Area Description: 
Calhoun, IA; Palo Alto, IA; Pocahontas, IA; Sac, IA
Forcast Office: 
NWS Des Moines IA
Sender: 
w-nws.webmaster@noaa.gov