FXUS65 KMSO 271907

AFDMSO



Area Forecast Discussion

National Weather Service Missoula MT

107 PM MDT Mon Oct 27 2025



.DISCUSSION...



KEY MESSAGES:



 -  Snow showers linger through this evening, mainly in the high 

    terrain, but also a few in valleys.



 -  Models are uncertain about the details of the next storm

    system set to arrive for the weekend with valley rain and

    mountain snow.



The morning's unsettled weather, which brought snow to the 

mountains, is now moving out of the region. This afternoon, we 

are seeing mainly mountain showers which will linger through the 

evening. A few valley showers are also possible by late evening.



There will be periods of clearing skies as a ridge of high 

pressure begins to build in, but widespread clearing skies will 

likely hold off until midday Tuesday. This ridge will briefly be 

in place on Tuesday, bringing dry, mostly sunny, and pleasant 

weather to the entire area. The ridge will be nudged by a weak, 

quick- moving system diving south on Wednesday. This will bring

light showers, mostly to the mountains of northwest and west- 

central Montana, but impacts are expected to be low.



Our attention then turns to the weekend. Model guidance show the 

next Pacific storm system arriving sometime over the weekend. This

looks like another "atmospheric river" event, but current 

thinking is that it will be weaker than the systems we've seen 

recently. It will likely bring a return to valley rain and 

mountain snow, but the exact timing and strength are still in 

question



&&



.AVIATION...



Lingering shower activity is expected to tapered off late this 

evening as a ridge of high pressure builds over the region. Most 

of the showers are in the mountains but high-resolution models 

suggest that a few showers will occur in the valleys by late this 

evening. Clouds will linger into Tuesday morning, especially over 

the terrain and from KMSO north through northwest Montana. 

Widespread clearing skies are expected to prevail by midday 

Tuesday.





&&



.MSO WATCHES/WARNINGS/ADVISORIES...

MT...None.

ID...None.

&&



$$