344  
FNUS55 KMSO 181022  
FWFMSO  
 
FIRE WEATHER PLANNING FORECAST FOR WRN MONTANA AND N CNTRL IDAHO  
NATIONAL WEATHER SERVICE MISSOULA MT  
422 AM MDT SUN AUG 18 2019  
 
   
DISCUSSION
 
 
IDAHO: A DRYING AND WARMING TREND WILL BEGIN TODAY AND LAST THROUGH MID  
WEEK. DAYTIME HIGHS WILL WARM SEVERAL DEGREES EACH DAY, PEAKING ON  
WEDNESDAY. MEANWHILE, MIN RH WILL GRADUALLY DECREASE EACH AFTERNOON.  
CUMULUS BUILD UPS ARE LIKELY ON THE TERRAIN BUT RAINFALL IS NOT  
EXPECTED. WESTERLY BREEZES WILL BE NOTICEABLE ON THE TERRAIN ESPECIALLY  
IN THE AFTERNOONS.  
 
MONTANA: A DRYING AND WARMING TREND WILL BEGIN TODAY AND LAST THROUGH  
MID WEEK. DAYTIME HIGHS WILL WARM SEVERAL DEGREES EACH DAY, PEAKING ON  
WEDNESDAY. MEANWHILE, MIN RH WILL GRADUALLY DECREASE EACH AFTERNOON.  
CUMULUS BUILD UPS ARE LIKELY ON THE TERRAIN WITH AN ISOLATED  
THUNDERSTORM POSSIBLE IN THE BEAVERHEAD/DEERLODGE NF EACH AFTERNOON  
BEGINNING MONDAY. WESTERLY BREEZES ARE ANTICIPATED EACH AFTERNOON AS  
WELL.  
 
VIEW FIRE WEATHER BRIEFING VIDEOS ON OUR YOUTUBE CHANNEL  
AT HTTPS://WWW.YOUTUBE.COM/NWSMISSOULA  
 
IDZ102-103-191030-  
PALOUSE/HELLS CANYON-CLEARWATER/NEZ PERCE-  
322 AM PDT SUN AUG 18 2019  
   
TODAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY.  
* MAX TEMPERATURE.....88-98 VALLEYS AND 70-80 RIDGES.  
* MIN HUMIDITY........20-30 PERCENT VALLEYS AND 28-38 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............SOUTHWEST 10-20 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........CLEAR.  
* MIN TEMPERATURE.....50-60.  
* MAX HUMIDITY........57-67 PERCENT.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......WEST 5-10 MPH.  
* RIDGE TOP............WEST 10-20 MPH BECOMING SOUTHWEST 5-10 MPH  
AFTER MIDNIGHT.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
MONDAY
 
 
* SKY/WEATHER.........SUNNY.  
* MAX TEMPERATURE.....85-95 VALLEYS AND 70-80 RIDGES.  
* MIN HUMIDITY........19-29 PERCENT VALLEYS AND 27-37 PERCENT RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............WEST 10-20 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TUESDAY
 
CLEAR. LOWS 55-65. HIGHS 85-95. NORTHEAST WINDS 10-15 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95. NORTH WINDS  
10-15 MPH.    
THURSDAY
 
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. WEST WINDS  
10-15 MPH.    
FRIDAY
 
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90.    
SATURDAY
 
PARTLY CLOUDY. LOWS 55-65. HIGHS 75-85.  
 

 
 
MTZ104-105-191030-  
KOOTENAI-FLATHEAD/GLACIER PARK-  
422 AM MDT SUN AUG 18 2019  
   
TODAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY.  
* MAX TEMPERATURE.....75-85 VALLEYS AND 60-70 RIDGES.  
* MIN HUMIDITY........27-37 PERCENT VALLEYS AND 49-59 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......SOUTH 5-15 MPH.  
* RIDGE TOP............SOUTHWEST 15-25 MPH.  
* HAINES INDEX........2 VERY LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........MOSTLY CLEAR.  
* MIN TEMPERATURE.....45-55.  
* MAX HUMIDITY........79-89 PERCENT VALLEYS AND 59-69 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......SOUTHWEST 5-15 MPH EARLY IN THE EVENING  
BECOMING DOWNSLOPE/DOWNVALLEY 2-5 MPH.  
* RIDGE TOP............SOUTHWEST 15-25 MPH.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
MONDAY
 
 
* SKY/WEATHER.........PARTLY CLOUDY.  
* MAX TEMPERATURE.....80-90 VALLEYS AND 65-75 RIDGES.  
* MIN HUMIDITY........23-33 PERCENT VALLEYS AND 41-51 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE 2-4 MPH BECOMING SOUTHWEST 5-15 MPH  
IN THE AFTERNOON.  
* RIDGE TOP............WEST 15-25 MPH.  
* HAINES INDEX........2 VERY LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TUESDAY
 
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85. SOUTH WINDS  
10-15 MPH.    
WEDNESDAY
 
PARTLY CLOUDY. LOWS 50-60. HIGHS 80-90. SOUTH WINDS  
10-20 MPH.    
THURSDAY
 
NOT AS WARM. PARTLY CLOUDY. LOWS 55-65. HIGHS 70-80.  
SOUTHWEST WINDS 10-20 MPH.    
FRIDAY
 
MOSTLY CLOUDY. LOWS 50-60. HIGHS 70-80.    
SATURDAY
 
MOSTLY CLOUDY. LOWS 50-60. HIGHS 70-80.  
 

 
 
MTZ106-108-191030-  
WEST LOLO-EAST LOLO-  
422 AM MDT SUN AUG 18 2019  
   
TODAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY.  
* MAX TEMPERATURE.....75-85 VALLEYS AND 68-78 RIDGES.  
* MIN HUMIDITY........29-39 PERCENT.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............WEST 15-25 MPH.  
* HAINES INDEX........2 VERY LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........MOSTLY CLEAR.  
* MIN TEMPERATURE.....50-55.  
* MAX HUMIDITY........63-73 PERCENT VALLEYS AND 54-64 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......WEST 5-15 MPH EARLY IN THE EVENING BECOMING  
DOWNSLOPE/DOWNVALLEY 2-5 MPH.  
* RIDGE TOP............WEST 15-25 MPH BECOMING SOUTHWEST 5-15 MPH  
AFTER MIDNIGHT.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
MONDAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY.  
* MAX TEMPERATURE.....78-88 VALLEYS AND 70-80 RIDGES.  
* MIN HUMIDITY........25-35 PERCENT VALLEYS AND 31-41 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......WEST 5-15 MPH.  
* RIDGE TOP............WEST 10-20 MPH INCREASING TO 20-30 MPH LATE  
IN THE AFTERNOON.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TUESDAY
 
CLEAR. LOWS 50-60. HIGHS 80-90. SOUTHWEST WINDS 10-20 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95. SOUTH WINDS  
10-20 MPH.    
THURSDAY
 
NOT AS WARM. PARTLY CLOUDY. LOWS 55-65. HIGHS 75-85. WEST  
WINDS 10-20 MPH.    
FRIDAY
 
MOSTLY CLOUDY. LOWS 50-60. HIGHS 75-85.    
SATURDAY
 
MOSTLY CLOUDY. LOWS 55-65. HIGHS 75-85.  
 

 
 
MTZ107-191030-  
SALISH AND KOOTENAI RESERVATION-  
422 AM MDT SUN AUG 18 2019  
   
TODAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY.  
* MAX TEMPERATURE.....80-85 VALLEYS AND 60-65 RIDGES.  
* MIN HUMIDITY........28-38 PERCENT VALLEYS AND 38-48 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............WEST 15-25 MPH.  
* HAINES INDEX........2 VERY LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........CLEAR.  
* MIN TEMPERATURE.....50-55.  
* MAX HUMIDITY........65-75 PERCENT VALLEYS AND 59-69 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......SOUTHWEST 5-10 MPH.  
* RIDGE TOP............SOUTHWEST 15-25 MPH.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
MONDAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY.  
* MAX TEMPERATURE.....85-90 VALLEYS AND 65-70 RIDGES.  
* MIN HUMIDITY........24-34 PERCENT VALLEYS AND 34-44 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE 1-3 MPH BECOMING UPSLOPE/UPVALLEY  
4-8 MPH IN THE AFTERNOON.  
* RIDGE TOP............WEST 15-25 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TUESDAY
 
CLEAR. LOWS 50-60. HIGHS 85-95. EAST WINDS 10-20 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95. SOUTH WINDS  
10-20 MPH.    
THURSDAY
 
NOT AS WARM. PARTLY CLOUDY. LOWS 55-65. HIGHS 75-85.  
SOUTHWEST WINDS 10-20 MPH.    
FRIDAY
 
MOSTLY CLOUDY. LOWS 55-65. HIGHS 80-90.    
SATURDAY
 
MOSTLY CLOUDY. LOWS 55-65. HIGHS 75-85.  
 

 
 
MTZ109-191030-  
BITTERROOT-  
422 AM MDT SUN AUG 18 2019  
   
TODAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY.  
* MAX TEMPERATURE.....85-90 VALLEYS AND 70-75 RIDGES.  
* MIN HUMIDITY........17-27 PERCENT VALLEYS AND 25-35 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE 1-3 MPH BECOMING UPSLOPE/UPVALLEY  
4-8 MPH IN THE AFTERNOON.  
* RIDGE TOP............WEST 10-20 MPH.  
* HAINES INDEX........4 LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........CLEAR.  
* MIN TEMPERATURE.....50-55.  
* MAX HUMIDITY........60-70 PERCENT VALLEYS AND 49-59 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......WEST 5-15 MPH EARLY IN THE EVENING BECOMING  
DOWNSLOPE/DOWNVALLEY 2-5 MPH.  
* RIDGE TOP............SOUTHWEST 10-20 MPH.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
MONDAY
 
 
* SKY/WEATHER.........SUNNY.  
* MAX TEMPERATURE.....85-90 VALLEYS AND 70-75 RIDGES.  
* MIN HUMIDITY........16-26 PERCENT VALLEYS AND 24-34 PERCENT RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE 1-3 MPH BECOMING NORTHWEST 5-15 MPH  
IN THE AFTERNOON.  
* RIDGE TOP............WEST 15-25 MPH.  
* HAINES INDEX........4 LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TUESDAY
 
CLEAR. LOWS 50-60. HIGHS 80-90. NORTHWEST WINDS 10-20 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 55-65. HIGHS 80-90. SOUTH WINDS  
10-15 MPH.    
THURSDAY
 
PARTLY CLOUDY. LOWS 55-65. HIGHS 75-85. WEST WINDS  
10-20 MPH.    
FRIDAY
 
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85.    
SATURDAY
 
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85.  
 

 
 
MTZ110-111-191030-  
DEERLODGE/WEST BEAVERHEAD-EAST BEAVERHEAD-  
422 AM MDT SUN AUG 18 2019  
   
TODAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY.  
* MAX TEMPERATURE.....80-85 VALLEYS AND 70-75 RIDGES.  
* MIN HUMIDITY........20-30 PERCENT.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......WEST 5-15 MPH.  
* RIDGE TOP............SOUTHWEST 15-25 MPH.  
* HAINES INDEX........4 LOW.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........MOSTLY CLEAR.  
* MIN TEMPERATURE.....45-55.  
* MAX HUMIDITY........57-67 PERCENT VALLEYS AND 38-48 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......WEST 5-15 MPH BECOMING SOUTH 5-10 MPH AFTER  
MIDNIGHT.  
* RIDGE TOP............WEST 15-25 MPH BECOMING SOUTHWEST 5-15 MPH  
IN THE LATE EVENING AND OVERNIGHT.  
* LAL.................1.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
MONDAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY BECOMING PARTLY CLOUDY IN THE  
AFTERNOON. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS LATE IN THE  
AFTERNOON.  
* MAX TEMPERATURE.....80-90 VALLEYS AND 75-80 RIDGES.  
* MIN HUMIDITY........18-28 PERCENT.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE 3-6 MPH BECOMING WEST 10-20 MPH IN  
THE AFTERNOON.  
* RIDGE TOP............SOUTHWEST 5-15 MPH INCREASING TO WEST 20-30  
MPH IN THE AFTERNOON.  
* HAINES INDEX........6 HIGH.  
* LAL.................1 IN THE DEERLODGE/WEST BEAVERHEAD...2 IN THE EAST  
BEAVERHEAD.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TUESDAY
 
PARTLY CLOUDY WITH A SLIGHT CHANCE OF THUNDERSTORMS. LOWS  
50-60. HIGHS 80-90. SOUTHWEST WINDS 15-25 MPH.   
WEDNESDAY
 
PARTLY CLOUDY WITH A SLIGHT CHANCE OF THUNDERSTORMS. LOWS  
50-60. HIGHS 80-90. SOUTH WINDS 10-15 MPH.    
THURSDAY
 
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. SOUTHWEST WINDS  
10-20 MPH.    
FRIDAY
 
PARTLY CLOUDY. LOWS 50-60. HIGHS 80-90.    
SATURDAY
 
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85.  
 

 
 
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