660  
FNUS55 KMSO 250948  
FWFMSO  
 
FIRE WEATHER PLANNING FORECAST FOR WRN MONTANA AND N CNTRL IDAHO  
NATIONAL WEATHER SERVICE MISSOULA MT  
348 AM MDT FRI MAY 25 2018  
 
   
DISCUSSION
 
 
IDAHO: SHOWERS, THUNDERSTORMS, AND HIGH HUMIDITY CONTINUE THROUGH THE  
WEEKEND AND INTO NEXT WEEK. MOST OF CENTRAL IDAHO WILL LIKELY NOT SEE  
HUMIDITY DROP BELOW 30 PERCENT FOR THE NEXT WEEK. SHOWERS AND  
THUNDERSTORMS TODAY WILL BE SLOW MOVING WITH SMALL HAIL AND HEAVY RAIN.  
DEBRIS FLOWS WILL BE A CONCERN TODAY AND THIS WEEKEND FOR BURN SCARS.  
 
MONTANA: A MOIST AIR MASS OVER THE REGION WILL CAUSE SHOWERS AND  
THUNDERSTORMS THIS EVENING. STORMS WILL BE SLOW MOVING WITH HEAVY RAIN  
AND SMALL HAIL. DEBRIS FLOWS WILL BE A CONCERN TODAY AND THIS WEEKEND  
FOR BURN SCARS. THIS WEEK MOST OF WEST CENTRAL AND SOUTHWEST MONTANA  
WON'T SEE HUMIDITY DROP BELOW 30 PERCENT. NORTHWEST MONTANA, MAINLY THE  
KOOTENAI NATIONAL FOREST, WILL BE THE EXCEPTION WHERE AFTERNOON  
HUMIDITIES TODAY AND THIS WEEKEND WILL DROP INTO THE LOW AND MID 20S.  
 
IDZ102-103-261000-  
PALOUSE/HELLS CANYON-CLEARWATER/NEZ PERCE-  
248 AM PDT FRI MAY 25 2018  
   
TODAY
 
 
* SKY/WEATHER.........PARTLY CLOUDY. RAIN SHOWERS LIKELY. CHANCE OF  
THUNDERSTORMS IN THE AFTERNOON.  
* MAX TEMPERATURE.....80-85 VALLEYS AND 65-75 RIDGES.  
* MIN HUMIDITY........31-41 PERCENT VALLEYS AND 41-51 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......BECOMING UPSLOPE/UPVALLEY 4-8 MPH LATE IN  
THE AFTERNOON.  
* RIDGE TOP............SOUTHEAST UP TO 5 MPH BECOMING NORTHWEST  
LATE IN THE AFTERNOON.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................3.  
* CWR (> 0.10 INCH)...10 PERCENT IN THE PALOUSE/HELLS CANYON...AND  
40 PERCENT IN THE CLEARWATER/NEZ PERCE.  
   
TONIGHT
 
 
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF THUNDERSTORMS IN THE  
EVENING. RAIN SHOWERS.  
* MIN TEMPERATURE.....45-55.  
* MAX HUMIDITY........88-98 PERCENT.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH.  
* RIDGE TOP............NORTHEAST 5-10 MPH.  
* LAL.................3.  
* CWR (> 0.10 INCH)...70 PERCENT.  
   
SATURDAY
 
 
* SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS LIKELY. SLIGHT  
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.  
* MAX TEMPERATURE.....70-75 VALLEYS AND 55-65 RIDGES.  
* MIN HUMIDITY........45-55 PERCENT VALLEYS AND 60-70 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............NORTHWEST 5-10 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................2.  
* CWR (> 0.10 INCH)...20 PERCENT IN THE PALOUSE/HELLS CANYON...AND  
40 PERCENT IN THE CLEARWATER/NEZ PERCE.  
   
SUNDAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE  
OF THUNDERSTORMS. LOWS 45-55. HIGHS 70-80. NORTHWEST WINDS 10-15 MPH.    
MEMORIAL DAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS. LOWS 50-60. HIGHS 70-80. NORTHWEST WINDS  
5-10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 45-55. HIGHS 70-80. WEST WINDS 5-10 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 45-55. HIGHS 65-75.    
THURSDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 45-55. HIGHS 60-70.  
 

 
 
MTZ104-105-261000-  
KOOTENAI-FLATHEAD/GLACIER PARK-  
348 AM MDT FRI MAY 25 2018  
   
TODAY
 
 
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS  
IN THE AFTERNOON.  
* MAX TEMPERATURE.....75-85 VALLEYS AND 65-70 RIDGES.  
* MIN HUMIDITY........23-33 PERCENT VALLEYS AND 33-43 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............SOUTHWEST 5-10 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................2.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.  
CHANCE OF THUNDERSTORMS IN THE EVENING. CHANCE OF RAIN SHOWERS.  
* MIN TEMPERATURE.....40-50.  
* MAX HUMIDITY........89-94 PERCENT VALLEYS AND 78-88 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH.  
* RIDGE TOP............SOUTHWEST 5-10 MPH.  
* LAL.................3.  
* CWR (> 0.10 INCH)...30 PERCENT.  
   
SATURDAY
 
 
* SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS LIKELY. SLIGHT  
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.  
* MAX TEMPERATURE.....70-80 VALLEYS AND 60-65 RIDGES.  
* MIN HUMIDITY........32-42 PERCENT VALLEYS AND 40-50 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............WEST 5-15 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................2 IN THE KOOTENAI...AND 3 IN THE  
FLATHEAD/GLACIER PARK.  
* CWR (> 0.10 INCH)...30 PERCENT IN THE KOOTENAI...AND 50 PERCENT  
IN THE FLATHEAD/GLACIER PARK.  
   
SUNDAY
 
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE  
OF THUNDERSTORMS. LOWS 45-55. HIGHS 70-80. WEST WINDS 10-15 MPH.    
MEMORIAL DAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 45-55. HIGHS 75-85. SOUTHEAST WINDS 5-10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 45-55. HIGHS 70-80. SOUTHWEST WINDS 5-10 MPH.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 45-55. HIGHS 65-75.    
THURSDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 40-50. HIGHS 60-70.  
 

 
 
MTZ106-108-261000-  
WEST LOLO-EAST LOLO-  
348 AM MDT FRI MAY 25 2018  
   
TODAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.  
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.  
* MAX TEMPERATURE.....75-85 VALLEYS AND 65-75 RIDGES.  
* MIN HUMIDITY........23-33 PERCENT VALLEYS AND 39-49 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN THE  
AFTERNOON.  
* RIDGE TOP............WEST UP TO 5 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................3.  
* CWR (> 0.10 INCH)...10 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF THUNDERSTORMS IN THE  
EVENING. RAIN SHOWERS LIKELY.  
* MIN TEMPERATURE.....45-50.  
* MAX HUMIDITY........82-92 PERCENT.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH.  
* RIDGE TOP............NORTH UP TO 5 MPH BECOMING SOUTH IN THE LATE  
EVENING AND OVERNIGHT.  
* LAL.................3.  
* CWR (> 0.10 INCH)...60 PERCENT.  
   
SATURDAY
 
 
* SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS LIKELY. SLIGHT  
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.  
* MAX TEMPERATURE.....70-75 VALLEYS AND 60-70 RIDGES.  
* MIN HUMIDITY........37-47 PERCENT VALLEYS AND 52-62 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......WEST 5-15 MPH.  
* RIDGE TOP............NORTHWEST 5-15 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................3.  
* CWR (> 0.10 INCH)...30 PERCENT IN THE WEST LOLO...AND 50 PERCENT  
IN THE EAST LOLO.  
   
SUNDAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE  
OF THUNDERSTORMS. LOWS 45-55. HIGHS 70-80. NORTHWEST WINDS 10-15 MPH.    
MEMORIAL DAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS. LOWS 45-55. HIGHS 70-80. NORTH WINDS 5-10 MPH.   
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 45-55. HIGHS 70-80. WEST WINDS 5-10 MPH.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 45-55. HIGHS 65-75.    
THURSDAY
 
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS. LOWS 45-55. HIGHS 60-70.  
 

 
 
MTZ107-261000-  
SALISH AND KOOTENAI RESERVATION-  
348 AM MDT FRI MAY 25 2018  
   
TODAY
 
 
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF THUNDERSTORMS IN THE  
AFTERNOON.  
* MAX TEMPERATURE.....75-80 VALLEYS AND 60-65 RIDGES.  
* MIN HUMIDITY........34-44 PERCENT.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN THE  
AFTERNOON.  
* RIDGE TOP............WEST UP TO 5 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................3.  
* CWR (> 0.10 INCH)...0 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF THUNDERSTORMS IN THE  
EVENING. RAIN SHOWERS LIKELY.  
* MIN TEMPERATURE.....45-55.  
* MAX HUMIDITY........88-94 PERCENT.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH.  
* RIDGE TOP............NORTHWEST UP TO 5 MPH BECOMING SOUTHEAST  
5-10 MPH IN THE LATE EVENING AND OVERNIGHT.  
* LAL.................3.  
* CWR (> 0.10 INCH)...50 PERCENT.  
   
SATURDAY
 
 
* SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS LIKELY. SLIGHT  
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.  
* MAX TEMPERATURE.....70-75 VALLEYS AND 60-65 RIDGES.  
* MIN HUMIDITY........38-48 PERCENT VALLEYS AND 48-58 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............NORTHWEST 5-15 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................2.  
* CWR (> 0.10 INCH)...40 PERCENT.  
   
SUNDAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE  
OF THUNDERSTORMS. LOWS 45-55. HIGHS 75-85. NORTHWEST WINDS 10-15 MPH.    
MEMORIAL DAY
 
MOSTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 50-60. HIGHS 75-85. VARIABLE WINDS UP TO 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 50-60. HIGHS 75-85. DIURNAL TERRAIN WINDS TO  
10 MPH.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS AND  
THUNDERSTORMS. LOWS 50-60. HIGHS 70-80.    
THURSDAY
 
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS. LOWS 45-55. HIGHS 65-75.  
 

 
 
MTZ109-261000-  
BITTERROOT-  
348 AM MDT FRI MAY 25 2018  
   
TODAY
 
 
* SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING MOSTLY CLOUDY.  
RAIN SHOWERS LIKELY. CHANCE OF THUNDERSTORMS IN THE AFTERNOON.  
* MAX TEMPERATURE.....80-85 VALLEYS AND 65-70 RIDGES.  
* MIN HUMIDITY........24-34 PERCENT VALLEYS AND 33-43 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............SOUTHWEST UP TO 5 MPH.  
* HAINES INDEX........4 LOW.  
* LAL.................3.  
* CWR (> 0.10 INCH)...30 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF THUNDERSTORMS IN THE  
EVENING. RAIN SHOWERS.  
* MIN TEMPERATURE.....40-50.  
* MAX HUMIDITY........86-96 PERCENT.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH.  
* RIDGE TOP............SOUTHEAST UP TO 5 MPH BECOMING EAST IN THE  
LATE EVENING AND OVERNIGHT.  
* LAL.................3.  
* CWR (> 0.10 INCH)...60 PERCENT.  
   
SATURDAY
 
 
* SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS LIKELY. SLIGHT  
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.  
* MAX TEMPERATURE.....70-75 VALLEYS AND 55-65 RIDGES.  
* MIN HUMIDITY........41-51 PERCENT VALLEYS AND 55-65 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............NORTHWEST 5-15 MPH.  
* HAINES INDEX........4 LOW.  
* LAL.................2.  
* CWR (> 0.10 INCH)...50 PERCENT.  
   
SUNDAY
 
MOSTLY CLOUDY WITH RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF  
THUNDERSTORMS. LOWS 45-55. HIGHS 65-75. NORTH WINDS 10-20 MPH.    
MEMORIAL DAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS. LOWS 45-55. HIGHS 65-75. NORTH WINDS 5-10 MPH.   
TUESDAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE  
OF THUNDERSTORMS. LOWS 45-55. HIGHS 70-80. VARIABLE WINDS UP TO 10 MPH.   
WEDNESDAY
 
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS. LOWS 45-55. HIGHS 65-75.    
THURSDAY
 
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS. LOWS 40-50. HIGHS 60-70.  
 

 
 
MTZ110-111-261000-  
DEERLODGE/WEST BEAVERHEAD-EAST BEAVERHEAD-  
348 AM MDT FRI MAY 25 2018  
   
TODAY
 
 
* SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE  
AFTERNOON.  
* MAX TEMPERATURE.....70-80 VALLEYS AND 65-70 RIDGES.  
* MIN HUMIDITY........33-43 PERCENT.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............SOUTH 5-15 MPH.  
* HAINES INDEX........3 VERY LOW.  
* LAL.................3.  
* CWR (> 0.10 INCH)...10 PERCENT.  
   
TONIGHT
 
 
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY  
THEN BECOMING MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND ISOLATED  
THUNDERSTORMS.  
* MIN TEMPERATURE.....40-45.  
* MAX HUMIDITY........84-94 PERCENT VALLEYS AND 74-84 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......SOUTH 5-10 MPH.  
* RIDGE TOP............SOUTH 5-15 MPH.  
* LAL.................3 IN THE DEERLODGE/WEST BEAVERHEAD...AND 2 IN  
THE EAST BEAVERHEAD.  
* CWR (> 0.10 INCH)...30 PERCENT IN THE DEERLODGE/WEST  
BEAVERHEAD...AND 0 PERCENT IN THE EAST BEAVERHEAD.  
   
SATURDAY
 
 
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS.  
ISOLATED THUNDERSTORMS IN THE AFTERNOON.  
* MAX TEMPERATURE.....68-78 VALLEYS AND 60-65 RIDGES.  
* MIN HUMIDITY........32-42 PERCENT VALLEYS AND 39-49 PERCENT  
RIDGES.  
* 20-FOOT WINDS.......  
* LOWER ELEVATION......VARIABLE LESS THAN 7 MPH.  
* RIDGE TOP............SOUTHWEST 5-15 MPH.  
* HAINES INDEX........4 LOW.  
* LAL.................3.  
* CWR (> 0.10 INCH)...40 PERCENT IN THE DEERLODGE/WEST  
BEAVERHEAD...AND 10 PERCENT IN THE EAST BEAVERHEAD.  
   
SUNDAY
 
COOLER. MOSTLY CLOUDY WITH RAIN SHOWERS LIKELY AND ISOLATED  
THUNDERSTORMS. LOWS 45-55. HIGHS 60-70. NORTH WINDS 10-20 MPH.    
MEMORIAL DAY
 
MOSTLY CLOUDY WITH RAIN SHOWERS LIKELY AND SLIGHT  
CHANCE OF THUNDERSTORMS. LOWS 45-55. HIGHS 60-70. NORTHEAST WINDS  
5-15 MPH.    
TUESDAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND THUNDERSTORMS.  
LOWS 40-50. HIGHS 65-75. WEST WINDS 5-10 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS. LOWS 40-50. HIGHS 65-75.    
THURSDAY
 
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND THUNDERSTORMS.  
LOWS 40-50. HIGHS 60-70.  
 

 
 
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