The latest look at the radar picture early this morning shows a large complex of wintry precipitation over the Upper Plains moving into the Mississippi Valley. This is characterized at the surface by a low pressure center in northwest Kansas and a stationary front from west central Minnesota through Nebraska. Light drizzle and light snow has been reported statewide alongside some patchy dense fog, already causing some travel disruptions. Snow is expected to expand further into the state as we approach the daybreak hours with the heaviest snow falling in the morning, and light-to-moderate snow continuing through much of the day.
Our latest snowfall map has titled the totals a bit more northwest than originally expected, to go alongside the short term model runs that have been consistent over the past several hours. Four-to-seven inches is generally expected across northwest and far north central Iowa, with two-to-four inches expected outside of this towards the Highway 20 corridor. To the south, a mix of snow, sleet, and freezing rain is expected. Either way, expect travel to be disrupted, whether from visibility reductions and snow covered roads to the north, or slick and icy roads south. A Winter Storm Warning will go into effect this morning for 11 counties in northern Iowa with an advisory elsewhere; these will go until late tonight. It’s important to note that strong winds will pick up behind the system as well, perhaps with gusts over 40 MPH at times. This will continue the issues with blowing snow and hazardous driving well into Tuesday.
Stay tuned to the Iowa Weather Network for the latest information.