Overnight snow expected to increase avalanche danger on Christmas Day in Utah

A backcountry avalanche watch issued Sunday for northern Utah mountains is expected to develop into dangerous avalanche conditions by Christmas morning with overnight snowfall.The Utah Avalanche Center said the avalanche watch is in effect until 6 a.m. Monday, when it could be upgraded to a warning. Both human-triggered and natural avalanches will become more likely, according to the center.The affected areas include the Wasatch range, Ogden-area mountains, the Bear River range and the western U