SALT LAKE CITY — A congressionally mandated climate change report predicts dire consequences for the United States if greenhouse gas emissions are not immediately reduced, adding that some of the most severe impacts will occur in Utah and other parts of the Southwest.

Utah experts say those changes are not on the doorstep, they’re already here.

“We are just on the fringe of this. It is only going to get more intense with droughts that are longer and hotter, and snow becoming less common until we have no snow at all,” predicted Brian McInerney, senior hydrologist with the National Weather Service in Salt Lake City.

The National Climate Change Assessment Report released…