Sioux Falls, South Dakota – Drivers across northeast Nebraska and northwest Iowa should use caution overnight as heavy rain and the threat of severe thunderstorms linger along U.S. Highway 20 and nearby regions. Localized flooding and scattered strong storms could pose hazards for those traveling late Wednesday into early Thursday.
According to the National Weather Service in Sioux Falls, Thursday and Friday will bring a break from the storms, with partly to mostly sunny skies and cooler, less humid air. Afternoon highs will reach the low to mid 80s, offering a brief respite before the weekend heat builds back in. Isolated storms remain possible Friday evening, especially in eastern South Dakota and along key routes like Interstate 29.
Saturday and Sunday will see a rapid return to summer heat, with highs rising into the mid 90s by Sunday and humidity levels climbing. Residents in Sioux Falls, Brookings, Yankton, and surrounding counties should prepare for increasing heat stress and limit outdoor activities during peak afternoon hours. Power outages and minor flooding are possible if isolated storms redevelop Friday night.
To stay safe: Avoid flooded roadways, charge mobile devices, and keep extra water on hand. Monitor local alerts as new advisories could be issued, especially if storms redevelop.
More warnings may be issued through Sunday as the heat wave intensifies.
Five Day Forecast for Sioux Falls and Surrounding Areas:
- Tonight: Strong to severe storms, 60-90% chance. Lows 63–69°F.
- Thursday: Partly to mostly sunny, highs 81–85°F. Lows 63–67°F.
- Friday: Mostly sunny, 20% chance of evening storms. Highs 82–88°F. Lows 64–67°F.
- Saturday: Hot and mostly sunny. Highs 86–95°F. Lows 69–73°F.
- Sunday: Very hot and sunny. Highs 90–97°F. Lows 68–74°F.
