 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. Chance of thunderstorms overnight, otherwise overcast skies. Lows dip down to about 64. Winds out of the south, 5 to 10 miles an hour. Cloudy skies expected again Sunday. Chance of thunderstorms. High temperatures reach up to 84.