Parts of Iowa saw high temperatures on Sunday in the 60s, while today, most areas of the state won’t even see highs in the teens. Wind chill advisories cover much of Iowa and Ben Moyer, a meteorologist at the National Weather Service, says the bitter cold and strong winds are making for very nasty conditions.

Moyer says the wind chills range from -20 to -35 degrees, with the coldest temperatures across northern Iowa from Spencer to Estherville and Mason City, where low wind chills have hit 38-below zero. He says anyone who has to be outside for any period of time had better bundle up.

Moyer says to wear as many layers of clothing as possible and try to reduce any exposed skin to as little as possible. He says forecasters are watching a massive storm system shape up that could dump heavy snow on much of Iowa tomorrow. He says snowfall may range anywhere from three to eight inches.

The latest computer models show the snow should start late Tuesday morning, falling much of the day and tapering off Tuesday night, though it’s still not clear exactly what parts of Iowa will get the worst of it. For updates, log on to the National Weather Service website .