The storms will make driving a challenge, particularly in the passes and canyons. Expected to be especially hard-hit were the Logan and Sardine summits on Highway 89 and Interstate 80 over Parleys Summit.
While the mountains will measure new snowfall in feet, the northern Utah valleys looked for at least an inch by nightfall Thursday and up to another 4 inches on Friday, with winds of 10-20 mph adding to the commuting drama. High temperatures Friday should range into the low 40s, turning some of that white stuff into icy slush; overnight lows were to be in the mid-20s.
The storm system's precipitation is expected take the form of rain in southern Utah, where wet weather likely will stretch through the weekend. High temperatures in the low to mid-50s are predicted, along with winds of 10-20 mph.
The Utah Avalanche Center began Thursday with "considerable' risk ratings for potentially deadly snowslides in the Uintas and the mountains above Logan and Moab; the rest of the state's slopes were initially graded at "moderate" risk for avalanches.
The Utah Division of Air Quality reported breathing conditions in the "green," or healthy category statewide.
For more extensive forecast information, visit the Tribune's weather page at http://www.sltrib.com/weather.