UNDATED (AP) -- National Weather Service offices in three states plan to experiment with a new warning to give people a heads-up when it gets dangerously cold.

Meteorologist John Paul Martin says the "extreme cold warnings" will supplement the wind chill advisories and warnings the agency already issues in North Dakota, South Dakota and Minnesota.

Martin says the new warning is for times when there are dangerously cold temperatures without wind. An extreme cold warning will be issued if the temperature is forecast to be 30 degrees below zero or colder with winds of less than 5 mph.

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