South Dakota Severe Severe Thunderstorm Warning | Effective 09-01-2026 18:41

Headline: 
Severe Thunderstorm Warning issued September 1 at 8:41PM CDT until September 1 at 9:30PM CDT by NWS Sioux Falls SD
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
September 1, 2026 - 6:41pm
Expires: 
September 1, 2026 - 7:30pm
Description: 
SVRFSD The National Weather Service in Sioux Falls has issued a * Severe Thunderstorm Warning for... Clay County in southeastern South Dakota... Southeastern Yankton County in southeastern South Dakota... Northwestern Union County in southeastern South Dakota... * Until 930 PM CDT. * At 840 PM CDT, a severe thunderstorm was located near St. Helena, or 12 miles southeast of Yankton, moving east at 40 mph. THIS IS A DESTRUCTIVE STORM FOR GAYVILLE, VERMILLION, AND UNION GROVE STATE PARK HAZARD...80 mph wind gusts and half dollar size hail. SOURCE...Public. 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. * This severe thunderstorm will be near... Vermillion and Meckling around 850 PM CDT. Union Grove State Park around 905 PM CDT.
Instruction: 
For your protection move to an interior room on the lowest floor of a building. To report severe weather, contact your nearest law enforcement agency. They will send your report to the National Weather Service office in Sioux Falls.
SNM:TORMENTA DE VIENTO DESTRUCTIVA en esta area hasta 930 PM CDT. Tome refugio ahora
Servicio Nacional de Meteorologia: AVISO DE TORMENTA SEVERA en efecto para esta area hasta las 9:30 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: 
Clay, SD; Union, SD; Yankton, SD
Forcast Office: 
NWS Sioux Falls SD
Sender: 
w-nws.webmaster@noaa.gov