One product issued by NWS for: Sioux Falls SD
Hazardous Weather Outlook
Hazardous Weather Outlook National Weather Service Sioux Falls SD 359 AM CDT Fri Sep 4 2026 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-050900- Lyon-Osceola-Dickinson-Sioux-O`Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory- Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook- Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton- Union- 359 AM CDT Fri Sep 4 2026 This Hazardous Weather Outlook is for northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, central South Dakota, east central South Dakota, south central South Dakota and southeast South Dakota. .DAY ONE...Today and tonight. Patchy fog could reduce visibility to 2 miles this morning. Heat index values climb into the mid and upper 90s to near 100 degrees this afternoon and evening. Use caution to prevent heat illness if spending time outdoors. Isolated storms are possible tonight, but severe weather is not expected. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Hot and humid conditions are expected through the weekend. Heat Index values will be in the 90s to around 100 during the afternoon. Please apply heat safety to your outdoor activities. Periods of isolated to scattered thunderstorms remain possible through the weekend. A stronger storm or two are possible but widespread severe weather is not expected. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this weekend. $$