The valleys won’t see much snow, but more snow is expected in the mountains.
Utahns can expect a lackluster start to the week. But winter storms can bring a white Christmas – and potentially disrupt building overturns.
Those valley inversions will strengthen through Wednesday, According to the National Weather Service, with increased fog and haze, cold temperatures and deterioration of air quality.
Follow Utah Department of Environmental Quality, The air quality index is forecast to be orange, or “unhealthy for sensitive groups,” through Wednesday in Salt Lake, Cache and Davis counties. It will also be orange in Weber and Box Elder counties on Tuesday and Wednesday. And in Utah and Tooele counties, the air quality index is forecast to be yellow, or “medium,” through Wednesday.
The storm system expected to arrive Wednesday night and continue into Thursday could wipe out valleys, according to the weather agency. Rain and then snow are forecast in the valleys. There can be up to a meter of snow in the mountains, with some accumulation at lower elevations.
In Salt Lake City, daytime peaks will be in the mid-30s through Wednesday, with overnight lows in teenagers and lows in their 20s. Light rain and snow is likely on Thursday. Wednesday, increases the chance of snow by 60% after 11 p.m., with accumulations of less than an inch. On Thursday, the chance of snowfall is 90%, with 1-3 inches of snow accumulation possible as temperatures rise in the mid-40s.
That storm is expected to move on Friday after dropping some more rain and snow, mostly later in the day. But another storm will move in on Christmas Day, with the possibility of sporadic sleet.
Snow is forecast for much of Utah Thursday through Sunday – from Logan in the north to Cedar City in the south, although no large accumulations of snow are expected in the valleys.
There is even a chance of rain and snow on Christmas Day in St. George, but the storm is expected to bring most of the rain to southwestern Utah from Thursday night through Saturday, with temperatures in the over 40s and lowest in the 50s.
https://www.sltrib.com/news/2021/12/20/utahns-could-see-snow/ Utahns may see snow and fresher air for Christmas