Freezing drizzle will continue through Friday afternoon and evening with roads expected to become slick south of Hwy 30. Snow will take over Friday night with the heaviest falling across northern Iowa.
A trace to 2″ is possible from southern Iowa through Hwy 30 with 2-4″ between Hwy 30 and Hwy 20, and 4-6″ along the northern border of the state. Winds will pick up from the north during the overnight causing blowing snow across the state through the afternoon Saturday. Another band of snow is expected late Saturday morning and this will be the best chance of seeing accumulating snow in central and southern Iowa.
The snow will be done by the late afternoon on Saturday and clouds will clear to the east. This however will allow for temperatures to dip back below zero early Sunday morning with wind chills expected to be between -30° to -20°. It will be dry and sunny on Sunday, but temperatures during the day will not be much better with highs in the single digits.
Sunday will be the coldest day we see this week by far. Beyond it, the weather starts to improve tremendously with highs in the 20s for Monday and in the upper 30s starting Tuesday.