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Flash Freeze and Snow Squalls

Posted at 6:52 PM, Feb 13, 2019
and last updated 2019-02-13 20:54:56-05

A WINTER WEATHER ADVISORY continues this evening.  The arctic boundary is moving back to the south after some places warmed up above freezing for highs on Wednesday.  After some melting of snow, a rapid drop in temperature is creating a flash freeze situation.  Roads are icing up and heavy snow showers are moving along this boundary.  These snow showers are locally heavy and can persist in some spots resulting in a quick accumulation of 1-3″ of snow.  Please be careful traveling tonight and Thursday morning.  The snow and clouds will move out Thursday morning with sunshine for much of Montana early on.  Highs will be cold but most of the state will have a sunny day until the afternoon when clouds increase.  Around dinnertime, snow will quickly move back in through the capital area up to Great Falls.  Please be careful Valentine’s Day evening.  Snow will continue Thursday night into Friday.  Friday will be mostly cloudy with areas of snow moving through the state.  Highs will remain cold up on the Hi-line, but warm up to the 30s in southern and central Montana.  Saturday will be a mostly cloudy day with snow showers increasing late in the day as another surge of arctic air moves south through the state.  Sunday will be much colder with snow in the morning.  Arctic high pressure will settle over the state Sunday night, and most of Montana will chill down to between -15 and -40 once again.  Monday is Presidents’ Day and it will start out dangerously cold but sunshine will prevail for the holiday.  This unusually cold and snowy pattern will continue through the rest of the month (another 2 weeks) at least.

Stay warm.

Curtis Grevenitz