CEDAR RAPIDS, Iowa (KCRG) -- Colder air moves in, just in time for the end of the week. A cold front dives south of the state tonight. Northwest winds behind the front keep temperatures well below normal. Highs in the 20s are likely for many right into the start of the weekend. Look for wind chills, by Friday morning, near the zero mark. Partly cloudy and cool for the weekend, with milder weather coming our way by midweek.