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Sunny day in Cherokee

Expect lots of sun and high temperatures today across Siouxland. Sioux City's high is forecast at 89 degrees. Tuesday brings a chance of scattered showers across the region.

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. 

More weather information

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