A cold front will move across the state today, reaching central Iowa by late in the evening, and southeast of Iowa later tonight. Thunderstorms will develop along the front today with some severe weather possible late this afternoon and early evening. Cooler weather will overspread the area for the weekend with highs in the upper 60s to mid 70s. Lows will be in the 40s to mid 50s, with a few upper 30s in the north Saturday Morning.