SIOUX CITY -- Most of northwest Iowa, southeast South Dakota and northeast Nebraska are under a heat advisory Wednesday afternoon as heat index values climb into the triple digits.
According to the Sioux Falls National Weather Service, the following counties are under a heat advisory beginning at noon Wednesday: Woodbury; Plymouth; Cherokee; Sioux; O'Brien; Osceola; Dickinson; Buena Vista; and Ida counties in Iowa as well as Dixon; Jackson; and Dakota counties in Nebraska and Clay and Union counties in South Dakota.
The heat advisory is expected to end at 8 p.m. Wednesday.
In Sioux City, heat index values are expected to be as high as 102 degrees by 2 p.m. The actual temperatures is expected to climb to 92 degrees in the later afternoon hours. The heat index is not expected to drop below 100 degrees until 7 p.m.
The heat is expected to stick around Thursday as well, with afternoon heat index values pegged at 103 degrees.