We have two relatively new types in winter weather warnings, called extreme cold warnings and cold weather advisories. Let's look at what those mean, and where they are in effect this weekend.

At 12:17 p.m. on Sunday, the National Weather Service released an extreme cold watch valid from Monday 7 p.m. until Tuesday 1 p.m. for Clearfield, Cambria and Somerset counties.

North Dakota and northern Minnesota will face severe conditions that could cause frostbite in less than 10 minutes.

An extreme cold warning was released by the National Weather Service on Thursday at 12:34 p.m. valid from Friday 7 p.m. until Saturday 1 p.m. for Berkshire County.

The National Weather Service released an extreme cold warning at 10:38 p.m. on Saturday valid for Monday between midnight and noon for Choctaw, Washington, Clarke, Wilcox, Monroe, Conecuh, Butler, Crenshaw,

Temperatures will rapidly fall from the low 30s Friday to single digits or below zero by Saturday morning, with west-northwest winds gusting 25-35 mph before a significant winter storm arrives Saturday night.

Here's a look at how cold we will get here in Michigan. There is a new type of winter weather watch, called an Extreme Cold Watch, and one has been issued.

The National Weather Service released a cold weather advisory at 1:41 a.m. on Sunday valid for Monday between midnight and 9 a.m. The advisory is for Leavenworth, Wyandotte, Johnson, Platte, Clay, Jackson,

There is an Extreme Cold Warning Friday for frigid wind chills. Chicago weather this weekend may include snow as a winter storm sweeps across the U.S.