Winter Weather Advisory issued February 14 at 9:38PM MST until February 15 at 5:00AM MST by NWS Great Falls MT

* WHAT…For the Winter Weather Advisory, snow. Additional snow
accumulations up to two inches. For the Winter Storm Watch, heavy
snow possible. Total snow accumulations between 7 and 11 inches
possible.

* WHERE…Upper Blackfoot and MacDonald Pass.

* WHEN…For the Winter Weather Advisory, until 5 AM MST Saturday.
For the Winter Storm Watch, from Sunday morning through Monday
afternoon.

* IMPACTS…Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Tire chains may be required for
some vehicles if traveling through mountain passes.

* ADDITIONAL DETAILS…Additional snow will fall Monday night into
Tuesday.