National Weather Service United States Department of Commerce

After one more day of seasonable temperatures, increased heat and humidity will return for the last weekend of July. Highs this weekend will range from lower to mid 90s east of I-29, to around 100 degrees toward central South Dakota. With humidity factored in, peak heat index values could reach 95 to 105 degrees, with locally higher values possible through portions of the Missouri River Valley if humidity levels remain high enough. Those with outdoor plans should take care to prevent heat illness, drinking plenty of water and spending time in air-conditioned places when possible.
While details in timing and coverage are uncertain, we are monitoring a conditional risk for severe storms Sunday evening into the overnight. If storms are able to develop, damaging winds, large hail and areas of heavy rain would be the primary risks. Be sure to monitor the latest forecast for updates and make sure you can receive watches and warnings, especially at night.