 Now, from your 24-hour weather station, here's Southern Iowa's most accurate forecast on Ottumwa Radio. I'm meteorologist Megan Mulford with a look at your forecast. A heat advisory continues. Sunshine mixed with clouds at times this afternoon with a slight chance of severe storms. High temperatures reach up to 97. Southwest winds 8 to 15 miles an hour. Chance of severe storms tonight, 71. Right now, 96.