Snow is expected to overspread much of northern Iowa west to east this afternoon as an area of strong low pressure approaches the Missouri River Valley from the Plains. There is potential for rain to mix in with the snow along the highway 20 and 30 corridors east of Interstate 35 at times this afternoon and evening.
Snow is expected to continue into Wednesday with the highest snowfall rates occurring late this afternoon through early Wednesday morning. Moderate to heavy accumulations of now are expected with the heaviest amounts toward the Minnesota border. Northwest winds will also increase by late tonight into Wednesday, leading to areas of blowing and drifting snow.
Snowfall accumulations of 4 to 12 inches will be expected within the winter storm warning, with the highest amounts expected in northwest Iowa near the Minnesota border. Very localized heavier amounts may be possible across far northern Iowa. The snow may be wet and heavy initially into tonight.
Roads will become slick and snow covered. The snow and blowing snow will create visibility restrictions and the combination of these elements will lead to hazardous travel conditions. This system will likely impact both the evening commute tonight and the morning commute on Wednesday.