Weather Service Report


278 
FXUS65 KMSO 230743
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
143 AM MDT Thu Sep 23 2021

.DISCUSSION...A closed system of high pressure off the coast of 
California will produce northwesterly flow aloft over the Northern
Rockies today and Friday. With a Pacific moisture stream well to 
our north, dry weather will prevail with mostly clear skies and 
light winds. The Pacific high pressure system begins to relax by 
Saturday, allowing flow aloft to shift to westerly and some 
moisture to drop south along the Canadian border. This setup will 
bring a chance for some increasing clouds to northwest Montana for
Saturday. Western Montana will see an increase in winds under the
westerly flow. Precipitation will remain scarce through Sunday. 
The bottom line is that the weather through the weekend will stay 
pretty benign. 

By early next week, confidence is growing for a deepening trough
to arrive on the west coast by Tuesday morning. Exact timing and
intensity of the trough are still uncertain. Expect a change to
more unsettled weather by midweek.


&&

.AVIATION...Skies will be mostly clear throughout the day today.
There will be a chance for isolated areas of fog along river
valleys this morning. Any fog that does form will lift this
morning and give way to VFR conditions through Friday at all
terminals. 



&&

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

$$

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Western Regional Climate Center, wrcc@dri.edu