Hazardous Weather Outlook
Issued by NWS Sioux Falls, SD
Issued by NWS Sioux Falls, SD
779 FLUS43 KFSD 170950 HWOFSD Hazardous Weather Outlook National Weather Service Sioux Falls SD 450 AM CDT Thu Sep 17 2026 IAZ002-003-MNZ071-072-080-081-089-090-097-098-SDZ038>040-050-052>065- 181000- Osceola-Dickinson-Lincoln-Lyon-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Beadle-Kingsbury-Brookings-Gregory-Jerauld-Sanborn- Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook-Minnehaha- Charles Mix-Douglas-Hutchinson- 450 AM CDT Thu Sep 17 2026 This Hazardous Weather Outlook is for northwest Iowa, southwest Minnesota, central South Dakota, east central South Dakota, south central South Dakota and southeast South Dakota. .DAY ONE...Today and tonight. Patchy dense fog will continue through mid-morning. Be prepared for rapid changes in visibility during on the morning commutes. Thunderstorm risks return late tonight through Friday morning. Main risk will be heavy rainfall with accumulations between 1-2 inches expected along and north of I-90. Locally higher accumulations will be possible. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. A conditional chance for stronger storms will be possible by Friday afternoon mainly along the U.S. Highway-20 corridor. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. $$ IAZ001-012>014-020>022-031-032-NEZ013-014-SDZ066>071-181000- Lyon-Sioux-O`Brien-Clay-Plymouth-Cherokee-Buena Vista-Woodbury-Ida- Dixon-Dakota-Turner-Lincoln-Bon Homme-Yankton-Union- 450 AM CDT Thu Sep 17 2026 This Hazardous Weather Outlook is for northwest Iowa, west central Iowa, northeast Nebraska and southeast South Dakota. .DAY ONE...Today and tonight. Patchy dense fog will continue through mid-morning. Be prepared for rapid changes in visibility during on the morning commutes. Thunderstorm risks return late tonight through Friday morning. Main risk will be heavy rainfall with accumulations between 0.25 to 0.75 of an inch along and south of U.S. Highway-18. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. A conditional chance for stronger storms will be possible by Friday afternoon mainly along the U.S. Highway-20 corridor. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. $$