...Bitter Wind Chills Tonight, Accumulating Snow Arrives Friday.... .Falling temperatures tonight and blustery northwest winds will lead to bitter cold wind chills of -20 to -25 through Thursday morning across north central Iowa. Snowfall returns Friday morning as a strong low pressure system takes aim on the region. The snow may be heavy at times during the morning and afternoon hours before transitioning into a period of light wintry mix or freezing rain. Strong northwest winds will develop Saturday which could lead to areas of blowing snow, in addition to lingering light snowfall Saturday morning. Highest snowfall accumulations nearing 6 inches will reside in north central Iowa with lesser amounts of 3 to 4 inches further south. ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM FRIDAY TO 6 PM CST SATURDAY... * WHAT...Mixed precipitation expected. Total snow accumulations of 3 to 5 inches and ice accumulations of around one tenth of an inch. Winds gusting as high as 45 mph. * WHERE...Central and Southern Iowa. * WHEN...From 6 AM Friday to 6 PM CST Saturday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning or evening commute. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS....For the Winter Weather Advisory, the snowfall will be first. The snowfall will then transition to a wintry mix, including freezing rain, by Friday night.