* WHAT...Blizzard conditions expected. Total snow accumulations between 2 and 4 inches and ice accumulations around a light glaze. Winds gusts over 55 mph possible. * WHERE...Much of northern Iowa. * WHEN...From 9 AM this morning to 9 AM CST Monday. * IMPACTS...Travel could be very difficult. Widespread blowing snow could significantly reduce visibility. The hazardous conditions will impact the Monday morning commute. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Travel may become nearly impossible due to whiteout conditions and blowing and drifting of snow.