North Dakota

Warmth is forecast to expand through the Great Lakes and Ohio Valley and all the way to the Atlantic coast as the week progresses. Following a chilly weekend in the Northeast, the wave of warmth will begin in earnest on Monday, then warmth will swell during the middle of the week.

AccuWeather forecasters are calling for temperatures to dip a dozen or more degrees below average for several days.

Restricting oil and gas development on federal lands in eight western states would prove costly, according to a new study released Tuesday by the state of Wyoming.

More severe storms, and possibly tornadoes, are expected Friday over some High Plains states.