Although Utah saw a lot of early snow in October and early November, it stopped snowing on November 12 and there was no snow in the past month. According to Utah avalanche forecaster Trent Meisenheimer, most of the snow in the southern region has melted, and the snow on the shady northern slopes has become very fragile and dangerous.

"Many south-facing hillsides are melted into bare mud, but on north-facing or shady hillsides, the snow becomes thin and multi-faceted," Meissenheimer said. "Or we call it sugar snow. It's basically like a ball bearing. When we add a new blizzard on it, we get a piece of snow on top of the weak layer. This is the perfect recipe for avalanches. So this will appear in On any slope at mid-to-high altitude with snow in October and November. And now, we see it produces avalanches, which can be triggered from a distance, and are dangerous. So my best advice to anyone who listens is Avoid north-facing slopes in mid-to-high altitude areas. Remember, avalanche terrain is any slope with a steepness greater than 30 degrees."

He said that two avalanches were reported on similar slopes on Sunday.

"One is an avalanche triggered remotely in a hidden canyon near the Brighton ski area, Masonheimer said. "This is in a remote area. When they collapsed, the party happened to be standing on the ridge and the avalanche was right in front of them. Jumped out. The other is a small wind board avalanche in Cardiff Fork [near the Great Clover Canyon]. But one thing to remember now is that, unfortunately, we encountered a dangerous situation again this winter. "

This dangerous setting can last for a while, and he said this week's storm will only create more dangerous conditions.

"You know, the southerly wind is whizzing at high altitudes, so we are accelerating there along the Park City ridgeline. You know that the wind speed of gusts is 20 to 30 mph, in the 40s to 50s." He said . "Across Jupiter Peak, it moves at a speed of approximately 35 to 45 miles per hour. The winds blowing through these high altitude areas in the 1960s and 1970s were very, very strong. This large-scale storm is approaching northern Utah as we speak, It can be windy for most of the day. Unfortunately, southerly winds increase the risk of avalanches and cause severe damage to our snow."

There is considerable danger on all steep slopes from northwest to east, because snow riders want to find fresh snow in remote areas.

ABC 4 meteorologist Thomas Geboy said that the storm will enter the state tomorrow afternoon and it may snow. It is more likely to snow on Tuesday night, and the snow will gradually decrease by noon on Wednesday, and the temperature will be lower. He said he expects more snowfall on Thursday night.

The first avalanche death in the United States this season was reported on Saturday. A 60-year-old man was killed, and five others were temporarily trapped in an area called Silver Basin in Washington, a closed area not far from the Crystal Mountain Resort. The Associated Press reported that although all the arrested are experienced backcountry skiers and carry necessary equipment, a warning has been issued to prohibit skiing in the area.