 Now, from your 24-hour weather station, here's Southern Iowa's most accurate forecast on Otomo Radio. I'm meteorologist Megan Mulford with a look at your forecast. A heat advisory begins at 1 p.m. this afternoon and continues until 8 p.m. tonight. Slight chance of thunderstorms overnight, otherwise mainly clear skies. Lows level off around 70. Southeasterly winds 5 to 10 miles an hour. Currently 75.