A cold front will move into far northern Iowa this evening and will become the focus for thunderstorm development into the evening. A few severe storms may occur with large hail and damaging winds possible. The cold front will move through the state overnight with showers and thunderstorms ending across southeast Iowa during the morning. Another push of cool and dry Canadian air will follow. Temperatures will be much cooler by Saturday with highs in the upper 60s to mid 70s expected.