Sioux Falls, SD – Residents across eastern South Dakota and northwest Iowa should prepare for a shift in weather this weekend, with heat giving way to a risk of isolated severe storms on Sunday.
According to the National Weather Service in Sioux Falls, heat index values are expected to climb into the mid-to-upper 90s Saturday afternoon, especially in Sioux Falls, Mitchell, and surrounding areas. Forecasters urge those with outdoor activities to stay hydrated, limit exposure, and wear lightweight clothing.
The greater concern arrives Sunday between 3 p.m. and 9 p.m., when scattered thunderstorms could develop across the region. The NWS reports the main threats include winds of 55 to 70 miles per hour and hail up to 1.5 inches in diameter—about the size of a ping pong ball. While this is not expected to be a high-end severe weather outbreak, forecasters caution that at least one or two strong storms could form, especially where heat and moisture combine.
Communities most at risk include Sioux Falls, Brookings, Mitchell, Yankton, and Storm Lake, along with nearby counties in South Dakota, northwest Iowa, and northeast Nebraska.
Officials recommend securing outdoor items that could be blown around by strong winds and monitoring local forecasts for updates.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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