588 
FXUS65 KMSO 092034
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
234 PM MDT Tue Oct 9 2018

.DISCUSSION...A pretty strong mid level low pressure system
currently resides over south central Idaho. Wrap around moisture
from this low extends into west central and southwest Montana as
well as central Idaho and Lemhi county. Areas most impacted by
this moisture will be across southwest Montana, Lost Trail pass
and southward into Lemhi county. 1-2" of accumulating snow is
possible above 5000 feet especially across Lemhi county. This
upper low will continue to move south and east of the region
leaving behind scattered rain and snow showers overnight. It's
possible a couple of showers could produce a quick inch of snow. 

Wednesday a trough will remain over the region resulting in
unstable and cool conditions. This will be conducive for continued
rain/snow showers across southwest Montana, central Idaho and
Lemhi county. 

Thursday and Friday, a general northerly flow will persist 
leaving us in a cool pattern with dry conditions. 

Late Friday into Saturday another weather system will move through
this north flow and impact the northern Rockies with another
closed low resulting in widespread rain and mountain snow showers. 

Sunday and Monday of next week expect dry conditions with warming
temperatures into the mid and upper 50s. This ridging pattern may
well last through the middle of next week with at or above normal
temperatures. 


&&

.AVIATION...Gusty easterly winds will dominate this afternoon until 
just after midnight, with areas around GPI gusting to 30 MPH 
including the higher terrain. From Hwy 12 south through 00Z there 
will be widespread light precipitation with freezing levels at or 
slightly below 5000 feet. For Wednesday, all areas except BTM and 
eastern Lemhi county will experience VFR conditions, there is the 
possibility of lingering showers to briefly bring down visibility 
in those two areas.





&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...Winter Weather Advisory until 9 PM MDT this evening ABOVE 5500 
     FEET for the Bitterroot/Sapphire Mountains...
     Butte/Blackfoot Region.

     Wind Advisory until 9 PM MDT this evening Flathead/Mission 
     Valleys.

     Winter Weather Advisory until 9 AM MDT Wednesday West Glacier 
     Region.

ID...Winter Weather Advisory until 8 PM PDT this evening ABOVE 5500 
     FEET for the Southern Clearwater Mountains.

     Winter Weather Advisory until 9 AM MDT Wednesday ABOVE 5500 FEET 
     for the Eastern Lemhi County...Western Lemhi County.

&&

$$