Could drop below freezing in the valleys.
22 Aug 2015 – A very cool weather system may produce valley rain and mountain snow in Glacier Park and nearby higher terrain, mainly above 7000 feet, tonight. A few inches of snow are possible over higher terrain
In addition, colder valley temperatures and frost are possible in northwest Montana by Saturday morning, and across much of western Montana by early Sunday morning. Temperatures are expected to fall into the 30s, with locally colder temps in the upper 20s in the usual colder locations, such as Seeley Lake, Georgetown Lake, Polebridge, and Olney.
According to the National Weather Service in Missoula, Montana, frost is likely tonight in Missoula, Flathead, Mission and Kootenai/Cabinet Region Valleys.
Sources:
Frost Advisory Alert: http://www.intellicast.com/Storm/Severe/Bulletins.aspx?state=MT
Tweet: https://twitter.com/mikerawlins/status/634928156835643392
Tweet: https://twitter.com/NWSMissoula/status/634876885080477697
http://www.wrh.noaa.gov/FXC/wxstory.php?wfo=mso
Thanks to Kenneth Lund and Ralph Fato for these links
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