783  
FXUS65 KMSO 192024  
AFDMSO  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE MISSOULA MT  
224 PM MDT TUE OCT 19 2021  
   
DISCUSSION
 
DRY AND BREEZY CONDITIONS WILL CONTINUE FOR MOST OF  
THE NORTHERN ROCKIES TODAY, WHICH MEANS NOW IS A GOOD TIME TO  
REMIND FOLKS THAT ALTHOUGH IT IS THE MIDDLE OF OCTOBER, FUELS ARE  
STILL VERY DRY, AS ARE HUMIDITY LEVELS ACROSS THE BOARD. WITH DRY  
AND WINDY CONDITIONS PERSISTING, REMEMBER TO DO YOUR PART TO  
PREVENT HUMAN-CAUSED WILDFIRE STARTS UNTIL THE REGION CAN GET  
SOME IMPACTFUL PRECIPITATION TO HELP EXTINGUISH THE ONES THAT  
HAVE RECENTLY STARTED.  
 
SPEAKING OF PRECIPITATION...A BRIEF ROUND OF VALLEY RAIN AND SNOW  
ABOVE 7000 FEET WILL OCCUR WEDNESDAY EVENING THROUGH THURSDAY  
MORNING, MAINLY ALONG THE MONTANA/IDAHO BORDER NORTH OF I-90 INTO  
NORTHWEST MONTANA. NOT MUCH IS EXPECTED TO FALL, BUT WE'LL TAKE  
WHAT WE CAN GET.  
 
AND THEN COMES THE MUCH MORE IMPACTFUL, VIGOROUS, AND LONG-  
LASTING WEATHER SYSTEM EXPECTED TO ENTER FROM THE WEST LATE  
FRIDAY INTO SATURDAY, BRINGING MULTIPLE PERIODS OF VALLEY RAIN AND  
MOUNTAIN SNOW THROUGH THE WEEKEND INTO EARLY NEXT WEEK. THIS WILL  
BEGIN THE LARGE- SCALE WEATHER PATTERN CHANGE EXPECTED FOR THE  
WESTERN UNITED STATES TO A MUCH COOLER AND MUCH WETTER PATTERN,  
PARTICULARLY MONDAY, TUESDAY, AND WEDNESDAY OF NEXT WEEK (OCT  
25-27). TO START, SNOW LEVELS WILL BE ROUGHLY ABOVE 6000 FEET,  
BUT WILL STEADILY LOWER THROUGH THE FIRST HALF OF NEXT WEEK.  
IN FACT, CONFIDENCE IS INCREASING THAT SNOW LEVELS WILL REACH AS  
LOW AS 4000 FEET BY TUESDAY (OCT 26).  
 

 
   
AVIATION
 
PERSISTENT EAST TO SOUTHEAST WINDS WILL CONTINUE AT  
ALL TERMINALS ACROSS THE NORTHERN ROCKIES THIS EVENING, IMPACTING  
KMSO AND KBTM MOST PROMINENTLY. GUSTS TO 30 KNOTS HAVE BEEN  
OBSERVED ALREADY AND SHOULD BE EXPECTED TO CONTINUE THROUGH  
20/0400Z BEFORE EASING SLIGHTLY. WINDS MAY CONTINUE TO BE SOMEWHAT  
BREEZY AFTER 20/0600Z, BUT ARE EXPECTED TO DIMINISH ON WEDNESDAY.  
 

 
   
MSO WATCHES/WARNINGS/ADVISORIES
 
 
MT...NONE.  
ID...NONE.  

 
 

 
 
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