The first major winter storm of the season is headed for Idaho, Montana and Wyoming, bringing with it the season's first hard freeze and snowfall to the Treasure Valley.
There’s a good chance of snow on Thursday in the Boise area.
National Weather Service Meteorologist Les Colin says an arctic air mass is coming in from central Canada.
“There was a typhoon whose remnants went up into the Bering Sea,” Colin says, “and it created an intense storm there and the consequences spread into North America and then down south into Canada and into the United States.”
What’s left of the typhoon is pushing cold arctic air south into Idaho and Montana. That means colder temperatures will start Monday in the Treasure Valley, and could be as low as 20 degrees overnight.
“The cold air will be in place here on Wednesday and Wednesday night, and then some moisture from the Pacific will come directly inland on Wednesday night into Thursday," says Colin.
Colin says the Treasure Valley could get an inch or two of snow this week.
He says it’s normal for the region to get snow flurries or a dusting of snow in November. But, he says, the area usually doesn't see its first inch of snow until early December. Temperatures in Boise could be in the teens.
In the Sawtooth Mountains, lows are likely to be in the double-digits below zero.
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