National Weather Service United States Department of Commerce

Areas of fog are causing visibility to drop below 1 mile early this morning, mainly near and south of the Missouri River Valley in South Dakota and Nebraska. Allow for extra time and slow down if you're travelling in these areas this morning!
Warm weather continues through the weekend with highs in the mid 80s to mid 90s and periods of breeziness. Increasing humidity will lead to heat indexes in the mid to upper 90s over the weekend, as well as the return of low shower and storm chances. Make sure to stay hydrated and take breaks from the heat!
A thick layer of wildfire smoke aloft will continue over the area through Thursday, and possibly into Friday afternoon. The air quality at the surface Wednesday evening was in the Moderate (level 2 of 6) category, and is expected to continue through the day Thursday. People sensitive to PM2.5 pollutants may wish to limit their outdoor exertion. Air quality should improve by Friday evening, as stronger south winds push the smoke away from the area.