915 
FXUS65 KMSO 190859
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
259 AM MDT Tue Oct 19 2021

.DISCUSSION...Any remaining light showers in Lemhi County this
morning will likely be in the mountainous terrain from Gilmore 
Summit and south. The rest of the day will be similar to Monday, 
with high temperatures still above normal but slightly cooler 
than yesterday, and easterly winds will be slowly dissipating 
over western Montana. 

Wednesday a weak wave rides up the western flank of a weak high 
pressure ridge. Light showers will spread from north-central Idaho
into northwest Montana overnight, additionally a few light 
showers are possible in the mountains around Missoula and the I-90
corridor as far east as Bearmouth.

Temperatures remain mild for this time of year on Thursday as a
strong low pressure system develops off the coast of British
Colombia. 

Friday into the beginning of next week, multiple systems will 
move through a broad trough that develops over the intermountain 
west. The initial system Friday into Saturday, may take a 
favorable track to bring modest precipitation to the mountains of 
north- central Idaho and northwest montana. However, as the 
forecast stands today north-central Idaho, Lemhi County, and 
mountains along the Idaho/ Montana border will be the
beneficiaries of multiple days of precipitation. These systems 
are not overly cool and snow levels generally stay 6000-7000 feet 
until Tuesday when they lower to around pass level. 

&&

.AVIATION...Any remaining showers this morning in lemhi County 
Idaho will be in higher terrain south of Gilmore Summit. The rest
of the day easterly winds will continue for terminals in western 
Montana. These easterly winds are relatively moist and the 
potential exists for scattered to broken mid and low-level clouds
to develop in smaller valleys, especially closer to the 
Continental Divide.


&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&

$$