251 
FXUS65 KMSO 270946
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
346 AM MDT Sun Oct 27 2019

.DISCUSSION...Cold northerly flow will persist over the Northern
Rockies today. Temperatures will remain well below normal for this
time of year as western Montana will be the 30s and north central
Idaho being in the 40s. Shower activity will be fairly limited
today with areas along the Continental Divide have the best chance
of experiencing flurries.

Another surge of even colder air is set to arrive along the 
Divide early Monday, then quickly spread south and westward 
reaching north-central Idaho and Lemhi County by evening. 

What to expect: 
* 1-3 inches of snow in western Montana/Lemhi County. Slippery roads 
  are likely for the passes and higher valleys along the Divide but 
  even the lower valleys of western Montana may see a period of snow 
  covered roads. Refreeze is possible Monday evening for wet roads.  
* Gusty winds of 25-35 mph. Reduced visibility due to blowing snow 
  possible. Also, choppy conditions for boaters on Flathead Lake. 

Snow will gradually diminish Monday night but a few showers will 
remain into Tuesday morning.

Very cold temperatures will occur Monday through Thursday:

* Wind chills: Monday evening will range from the single digits to
  -10F across the valleys of western Montana. 
* Overnight lows: Tuesday-Thursday mornings look to be below zero
  along the Divide, single digits for many valleys of western Montana 
  with teens in the valleys of North-central Idaho. 
* High temperatures: Coldest on Tuesday with much of western Montana 
  expected to remain in the 20s. Only a very slight improvement is 
  expected Wednesday and Thursday. Trick-or-treaters will experience 
  temperatures in the 20s and 30s, plan accordingly.

A very gradual moderation in temperatures is expected for the end
of the coming week into next weekend but temperatures will continue 
to be below seasonable levels. Occasional snow showers are also 
possible but significant impacts are not anticipated.


&&

.AVIATION...Fairly clear skies has allowed for the development of
patchy fog, especially across north central Idaho. This fog will
dissipate throughout the morning. Northerly upper level flow
persists over the Northern Rockies today with scattered mid level
clouds passing over western Montana. Shower activity will be
limited with the Continental Divide having the best chance of
experiencing flurries throughout the day. Another arctic cold
front is expected to impact the Northern Rockies late tonight into
Monday causing another round of snow and gusty northeasterly
winds.  


&&

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

$$