A blizzard warning is in effect from 9 a.m. Thursday to 6 a.m. Friday for Marshalltown and surrounding areas.
The National Weather Service said rain is expected to begin Wednesday night into Thursday morning before transitioning into a wintry mix and turn to snow Thursday morning.
Moderate to heavy snowfall followed by strong and gusty northwest winds will produce blizzard conditions Thursday afternoon into Thursday night over northern Iowa and potential
across portions further south and west.
Rain will be common until after sunrise Thursday, then the precipitation is forecast to transition to all snow mid to late Thursday morning. Moderate to heavy wet snow will fall through the late morning into Thursday afternoon. Thundersnow is possible Thursday afternoon and could produce snowfall rates of 2 inches per hour at times. The very strong northwest winds develop in the afternoon Thursday and will create widespread blizzard conditions into Thursday night.
A blizzard warning means severe winter weather conditions are expected or occurring. falling and blowing snow with strong winds and poor visibilities are likely. This will lead to whiteout
conditions making travel extremely dangerous. If you must travel, have a winter survival kit with you. If you get stranded, stay with your vehicle.