A significant winter storm is forecasted to impact South Dakota this weekend, leading to the closure of Interstate 29 and Interstate 90 as travel advisories have been issued due to dangerous road conditions. Heavy snowfall and strong winds are predicted, resulting in blizzard conditions that could create whiteout scenarios across the region. Local authorities, including the South Dakota Department of Transportation (SDDOT), are closely monitoring the situation and have urged residents to avoid travel if possible. The Sioux Falls Regional Airport has also temporarily closed due to the severe weather. As conditions worsen, many county roads are reported to be ice-covered. Residents are advised to stay updated with weather alerts and prepare for potentially hazardous travel conditions throughout the weekend.