817  
FNUS55 KBYZ 110735  
FWFBYZ  
 
FIRE WEATHER PLANNING FORECAST FOR SCEN AND SERN MONTANA  
NATIONAL WEATHER SERVICE BILLINGS MT  
135 AM MDT SUN APR 11 2021  
   
DISCUSSION
 
 
LOOK FOR MUCH COOLER AND BRISK CONDITIONS TODAY WITH AREAS OF  
RAIN/SNOW. NORTHWEST WINDS 20-30 MPH WILL BE COMMON, ESPECIALLY  
ACROSS THE DISTRICTS SOUTH AND EAST OF BILLINGS. HIGHS WILL ONLY  
BE IN THE 40S AT MOST LOCATIONS. THE PATTERN WILL REMAIN FAVORABLE  
FOR EASTERLY SURFACE WINDS AND TEMPERATURES IN THE UPPER 30S TO  
40S MUCH OF THIS WEEK. THERE APPEARS TO BE A GOOD CHANCE OF  
WIDESPREAD WET SNOW AT MIDWEEK, ALTHOUGH THERE REMAINS  
CONSIDERABLE UNCERTAINTY YET FOR TIMING AND AMOUNTS. BT  
 
MTZ123-112215-  
GALLATIN NATIONAL FOREST-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY.  
* MAX TEMPERATURE.......36-45 AT 5000 FEET...25-35 AT 7000 FEET.  
* 24 HR TREND.........14 DEGREES COOLER.  
* MIN HUMIDITY..........29-38 PERCENT AT 5000 FEET...37-47 PERCENT  
AT 7000 FEET.  
* 24 HR TREND.........8 PERCENT WETTER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTHWEST WINDS 10 TO 20 MPH.  
* RIDGETOP.............NORTHWEST 5 TO 15 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................LESS THAN 10 PERCENT.  
* HAINES INDEX..........2.  
   
TONIGHT
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED SNOW SHOWERS IN THE  
EVENING.  
* MIN TEMPERATURE.......19-27 AT 5000 FEET...10-20 AT 7000 FEET.  
* 24 HR TREND.........1 DEGREE WARMER.  
* MAX HUMIDITY..........67-77 PERCENT AT 5000 FEET...70-80 PERCENT  
AT 7000 FEET.  
* 24 HR TREND.........4 PERCENT DRIER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTH WINDS 5 TO 10 MPH.  
* RIDGETOP.............NORTH 5 TO 10 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
   
MONDAY
 
 
* SKY/WEATHER...........PARTLY SUNNY WITH ISOLATED SNOW SHOWERS.  
* MAX TEMPERATURE.......34-44 AT 5000 FEET...24-34 AT 7000 FEET.  
* 24 HR TREND.........UNCHANGED.  
* MIN HUMIDITY..........29-39 PERCENT AT 5000 FEET...37-47 PERCENT  
AT 7000 FEET.  
* 24 HR TREND.........UNCHANGED.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTH WINDS 5 TO 15 MPH.  
* RIDGETOP.............NORTHEAST 5 TO 15 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
PARTLY CLOUDY. LOWS 17 TO 25. NORTHEAST WINDS  
5 TO 15 MPH.    
TUESDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 19 TO 25.  
HIGHS 30 TO 40. NORTHEAST WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 22 TO 27. HIGHS  
30 TO 40. NORTHEAST WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 24 TO 29. HIGHS  
33 TO 43. NORTHEAST WINDS 5 TO 10 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 25 TO 30.  
HIGHS 39 TO 49.    
SATURDAY
 
MOSTLY SUNNY. ISOLATED SNOW SHOWERS. HIGHS 43 TO 53.  
 

 
 
MTZ124-112215-  
WHEATLAND COUNTY/SWEET GRASS COUNTY-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........PARTLY SUNNY.  
* MAX TEMPERATURE.......40-45.  
* 24 HR TREND.........19 DEGREES COOLER.  
* MIN HUMIDITY..........29-34 PERCENT.  
* 24 HR TREND.........16 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO  
AROUND 35 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
* HAINES INDEX..........3.  
   
TONIGHT
 
 
* SKY/WEATHER...........MOSTLY CLOUDY.  
* MIN TEMPERATURE.......19-24.  
* 24 HR TREND.........4 DEGREES COOLER.  
* MAX HUMIDITY..........72-77 PERCENT.  
* 24 HR TREND.........4 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO 30  
MPH IN THE EVENING.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
   
MONDAY
 
 
* SKY/WEATHER...........MOSTLY SUNNY. ISOLATED RAIN SHOWERS AND  
SNOW SHOWERS IN THE AFTERNOON.  
* MAX TEMPERATURE.......38-43.  
* 24 HR TREND.........2 DEGREES COOLER.  
* MIN HUMIDITY..........32-37 PERCENT.  
* 24 HR TREND.........3 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTH WINDS 15 TO 25 MPH. GUSTS UP TO 30 MPH  
IN THE AFTERNOON.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 18 TO  
23. NORTH WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.    
TUESDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 16 TO 21.  
HIGHS 34 TO 39. NORTHEAST WINDS 10 TO 20 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 20 TO  
25. HIGHS 31 TO 36. EAST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND  
30 MPH.    
THURSDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 22 TO 27. HIGHS  
35 TO 40. NORTH WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 23 TO 28.  
HIGHS 41 TO 46.    
SATURDAY
 
PARTLY SUNNY. HIGHS 45 TO 50.  
 

 
 
MTZ125-112215-  
STILLWATER COUNTY-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED SNOW SHOWERS IN THE  
AFTERNOON.  
* MAX TEMPERATURE.......41-46.  
* 24 HR TREND.........20 DEGREES COOLER.  
* MIN HUMIDITY..........29-34 PERCENT.  
* 24 HR TREND.........14 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO  
AROUND 35 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
* HAINES INDEX..........3.  
   
TONIGHT
 
 
* SKY/WEATHER...........CLOUDY. SCATTERED SNOW SHOWERS IN THE  
EVENING, THEN ISOLATED SNOW SHOWERS OVERNIGHT.  
* MIN TEMPERATURE.......23-28.  
* 24 HR TREND.........1 DEGREE COOLER.  
* MAX HUMIDITY..........67-72 PERCENT.  
* 24 HR TREND.........17 PERCENT DRIER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH. GUSTS UP TO 30  
MPH IN THE EVENING.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................10 PERCENT.  
   
MONDAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED SNOW SHOWERS IN THE  
MORNING, THEN SCATTERED RAIN SHOWERS AND SNOW SHOWERS IN THE  
AFTERNOON.  
* MAX TEMPERATURE.......38-43.  
* 24 HR TREND.........3 DEGREES COOLER.  
* MIN HUMIDITY..........33-38 PERCENT.  
* 24 HR TREND.........4 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTH WINDS 5 TO 15 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 20 TO  
25. NORTH WINDS 5 TO 15 MPH.    
TUESDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 20 TO 25.  
HIGHS 33 TO 38. NORTHEAST WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 23 TO 28. HIGHS  
31 TO 36. NORTHEAST WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 25 TO 30. HIGHS  
35 TO 40. NORTHWEST WINDS 5 TO 10 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 25 TO 30.  
HIGHS 39 TO 44.    
SATURDAY
 
PARTLY SUNNY. ISOLATED RAIN SHOWERS AND SNOW SHOWERS.  
HIGHS 43 TO 48.  
 

 
 
MTZ126-112215-  
BEARTOOTH RANGER DISTRICT CUSTER NATIONAL FOREST-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED SNOW SHOWERS IN  
THE AFTERNOON.  
* MAX TEMPERATURE.......36-44 AT 5000 FEET...27-37 AT 7000 FEET.  
* 24 HR TREND.........16 DEGREES COOLER.  
* MIN HUMIDITY..........31-41 PERCENT AT 5000 FEET...39-49 PERCENT  
AT 7000 FEET.  
* 24 HR TREND.........18 PERCENT WETTER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO  
AROUND 30 MPH.  
* RIDGETOP.............NORTH 15 TO 25 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................20 PERCENT.  
* HAINES INDEX..........2.  
   
TONIGHT
 
 
* SKY/WEATHER...........CLOUDY WITH SCATTERED SNOW SHOWERS.  
* MIN TEMPERATURE.......23-28 AT 5000 FEET...12-22 AT 7000 FEET.  
* 24 HR TREND.........UNCHANGED.  
* MAX HUMIDITY..........59-69 PERCENT AT 5000 FEET...64-74 PERCENT  
AT 7000 FEET.  
* 24 HR TREND.........14 PERCENT DRIER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 15 MPH.  
* RIDGETOP.............NORTHWEST 5 TO 15 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................50 PERCENT.  
   
MONDAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY WITH SCATTERED SNOW SHOWERS.  
* MAX TEMPERATURE.......32-40 AT 5000 FEET...25-35 AT 7000 FEET.  
* 24 HR TREND.........2 DEGREES COOLER.  
* MIN HUMIDITY..........32-42 PERCENT AT 5000 FEET...45-55 PERCENT  
AT 7000 FEET.  
* 24 HR TREND.........7 PERCENT WETTER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTH WINDS 5 TO 15 MPH.  
* RIDGETOP.............NORTHWEST 10 TO 20 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................20 PERCENT.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 21 TO  
26. NORTH WINDS 5 TO 15 MPH.    
TUESDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 20 TO 25.  
HIGHS 29 TO 36. NORTH WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SNOW. LOWS 24 TO 29. HIGHS 31 TO 38.  
NORTH WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLOUDY. SNOW. LOWS 25 TO 30. HIGHS 31 TO 38.  
NORTH WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 27 TO 32.  
HIGHS 36 TO 42.    
SATURDAY
 
PARTLY SUNNY. SCATTERED SNOW SHOWERS. HIGHS 39 TO 47.  
 

 
 
MTZ127-112215-  
GOLDEN VALLEY COUNTY/MUSSELSHELL COUNTY-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY WITH ISOLATED SNOW SHOWERS IN  
THE MORNING, THEN MOSTLY SUNNY IN THE AFTERNOON.  
* MAX TEMPERATURE.......40-45.  
* 24 HR TREND.........20 DEGREES COOLER.  
* MIN HUMIDITY..........35-40 PERCENT.  
* 24 HR TREND.........23 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............WINDY. NORTHWEST WINDS 15 TO 30 MPH WITH  
GUSTS TO AROUND 40 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
* HAINES INDEX..........3.  
   
TONIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY.  
* MIN TEMPERATURE.......25-30.  
* 24 HR TREND.........3 DEGREES COOLER.  
* MAX HUMIDITY..........64-69 PERCENT.  
* 24 HR TREND.........18 PERCENT DRIER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO 35  
MPH IN THE EVENING.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
   
MONDAY
 
 
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED SNOW SHOWERS IN THE  
MORNING, THEN ISOLATED RAIN SHOWERS AND SNOW SHOWERS IN THE  
AFTERNOON.  
* MAX TEMPERATURE.......36-41.  
* 24 HR TREND.........4 DEGREES COOLER.  
* MIN HUMIDITY..........39-44 PERCENT.  
* 24 HR TREND.........4 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTH WINDS 10 TO 20 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 23 TO  
28. NORTH WINDS 10 TO 20 MPH.    
TUESDAY
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 21 TO 26.  
HIGHS 32 TO 37. NORTHEAST WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 26 TO 31. HIGHS  
31 TO 36. NORTHEAST WINDS 10 TO 20 MPH.    
THURSDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 28 TO 33. HIGHS  
32 TO 37. NORTH WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 29 TO 34.  
HIGHS 39 TO 44.    
SATURDAY
 
PARTLY SUNNY. ISOLATED SNOW SHOWERS. HIGHS 43 TO 48.  
 

 
 
MTZ128-112215-  
YELLOWSTONE COUNTY-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED SNOW SHOWERS IN THE  
MORNING.  
* MAX TEMPERATURE.......46-51.  
* 24 HR TREND.........20 DEGREES COOLER.  
* MIN HUMIDITY..........27-32 PERCENT.  
* 24 HR TREND.........15 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............WINDY. NORTHWEST WINDS 15 TO 30 MPH WITH  
GUSTS TO AROUND 40 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
* HAINES INDEX..........3.  
   
TONIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY.  
* MIN TEMPERATURE.......25-30.  
* 24 HR TREND.........4 DEGREES COOLER.  
* MAX HUMIDITY..........62-67 PERCENT.  
* 24 HR TREND.........13 PERCENT DRIER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH. GUSTS UP TO 30  
MPH IN THE EVENING.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
   
MONDAY
 
 
* SKY/WEATHER...........MOSTLY SUNNY IN THE MORNING, THEN MOSTLY  
CLOUDY WITH ISOLATED RAIN SHOWERS IN THE AFTERNOON.  
* MAX TEMPERATURE.......41-46.  
* 24 HR TREND.........5 DEGREES COOLER.  
* MIN HUMIDITY..........31-36 PERCENT.  
* 24 HR TREND.........4 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 10 TO 20 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 23 TO  
28. NORTH WINDS 10 TO 20 MPH.    
TUESDAY
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 23 TO 28.  
HIGHS 37 TO 42. NORTHEAST WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 27 TO 32. HIGHS  
36 TO 41. NORTHEAST WINDS 10 TO 20 MPH.    
THURSDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 27 TO 32. HIGHS  
37 TO 42. NORTH WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SCATTERED RAIN SHOWERS AND SNOW SHOWERS.  
LOWS 28 TO 33. HIGHS 43 TO 48.    
SATURDAY
 
PARTLY SUNNY. ISOLATED SNOW SHOWERS. HIGHS 47 TO 52.  
 

 
 
MTZ129-112215-  
CROW INDIAN RESERVATION/BIGHORN CANYON REC AREA-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. SNOW IN THE MORNING.  
* MAX TEMPERATURE.......35-45 AT 5000 FEET...28-34 AT 7000 FEET.  
* 24 HR TREND.........22 DEGREES COOLER.  
* MIN HUMIDITY..........36-46 PERCENT AT 5000 FEET...51-59 PERCENT  
AT 7000 FEET.  
* 24 HR TREND.........27 PERCENT WETTER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........WINDY. NORTHWEST WINDS 20 TO 35 MPH WITH  
GUSTS TO AROUND 45 MPH.  
* RIDGETOP.............NORTHWEST 20 TO 35 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................50 PERCENT.  
* HAINES INDEX..........3.  
   
TONIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY.  
* MIN TEMPERATURE.......21-28 AT 5000 FEET...16-21 AT 7000 FEET.  
* 24 HR TREND.........UNCHANGED.  
* MAX HUMIDITY..........63-73 PERCENT AT 5000 FEET...74-84 PERCENT  
AT 7000 FEET.  
* 24 HR TREND.........19 PERCENT DRIER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO 40  
MPH IN THE EVENING.  
* RIDGETOP.............NORTHWEST 15 TO 25 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
   
MONDAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY WITH SCATTERED SNOW SHOWERS.  
* MAX TEMPERATURE.......32-42 AT 5000 FEET...25-32 AT 7000 FEET.  
* 24 HR TREND.........3 DEGREES COOLER.  
* MIN HUMIDITY..........37-47 PERCENT AT 5000 FEET...50-60 PERCENT  
AT 7000 FEET.  
* 24 HR TREND.........3 PERCENT WETTER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTHWEST WINDS 15 TO 25 MPH.  
* RIDGETOP.............NORTHWEST 20 TO 35 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................20 PERCENT.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 19 TO  
26. NORTHWEST WINDS 10 TO 20 MPH.    
TUESDAY
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 19 TO 25.  
HIGHS 28 TO 38. NORTH WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 25 TO 31. HIGHS  
30 TO 40. EAST WINDS 10 TO 20 MPH.    
THURSDAY
 
CLOUDY, SNOW. LOWS 25 TO 32. HIGHS 30 TO 40. NORTH  
WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 26 TO 32. HIGHS 35 TO  
45.    
SATURDAY
 
PARTLY SUNNY. SCATTERED SNOW SHOWERS. HIGHS 39 TO 49.  
 

 
 
MTZ130-112215-  
NORTHERN ROSEBUD/NORTHERN TREASURE COUNTIES-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........CLOUDY WITH SNOW LIKELY AND SCATTERED RAIN  
SHOWERS IN THE MORNING, THEN PARTLY SUNNY IN THE AFTERNOON.  
* MAX TEMPERATURE.......47-52.  
* 24 HR TREND.........20 DEGREES COOLER.  
* MIN HUMIDITY..........34-39 PERCENT.  
* 24 HR TREND.........24 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............WINDY. NORTHWEST WINDS 15 TO 30 MPH WITH  
GUSTS TO AROUND 40 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................30 PERCENT.  
* HAINES INDEX..........3.  
   
TONIGHT
 
 
* SKY/WEATHER...........MOSTLY CLEAR.  
* MIN TEMPERATURE.......25-30.  
* 24 HR TREND.........4 DEGREES COOLER.  
* MAX HUMIDITY..........69-74 PERCENT.  
* 24 HR TREND.........3 PERCENT DRIER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO 35  
MPH IN THE EVENING.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
   
MONDAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED SNOW SHOWERS IN  
THE MORNING, THEN ISOLATED RAIN SHOWERS AND SNOW SHOWERS IN THE  
AFTERNOON.  
* MAX TEMPERATURE.......40-45.  
* 24 HR TREND.........7 DEGREES COOLER.  
* MIN HUMIDITY..........39-44 PERCENT.  
* 24 HR TREND.........5 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 15 TO 25 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................LESS THAN 10 PERCENT.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 22 TO  
27. NORTHWEST WINDS 10 TO 20 MPH.    
TUESDAY
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 21 TO 26.  
HIGHS 38 TO 43. NORTH WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 28 TO  
33. HIGHS 40 TO 45. EAST WINDS 10 TO 20 MPH.    
THURSDAY
 
MOSTLY CLOUDY. RAIN AND SNOW LIKELY. LOWS 29 TO 34.  
HIGHS 41 TO 46. NORTHEAST WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SCATTERED RAIN SHOWERS AND SNOW SHOWERS.  
LOWS 29 TO 34. HIGHS 45 TO 50.    
SATURDAY
 
PARTLY SUNNY. ISOLATED RAIN SHOWERS AND SNOW SHOWERS.  
HIGHS 50 TO 55.  
 

 
 
MTZ131-112215-  
NORTHERN CHEYENNE INDIAN RESERVATION/ASHLAND RANGER DISTRICT  
CUSTER NATL FOREST-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED SNOW SHOWERS IN  
THE MORNING.  
* MAX TEMPERATURE.......42-47.  
* 24 HR TREND.........25 DEGREES COOLER.  
* MIN HUMIDITY..........34-39 PERCENT.  
* 24 HR TREND.........22 PERCENT WETTER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........WINDY. NORTHWEST WINDS 20 TO 35 MPH WITH  
GUSTS TO AROUND 45 MPH.  
* RIDGETOP.............NORTHWEST 25 TO 40 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................10 PERCENT.  
* HAINES INDEX..........3.  
   
TONIGHT
 
 
* SKY/WEATHER...........MOSTLY CLEAR.  
* MIN TEMPERATURE.......23-28.  
* 24 HR TREND.........3 DEGREES COOLER.  
* MAX HUMIDITY..........73-78 PERCENT.  
* 24 HR TREND.........10 PERCENT DRIER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO 40  
MPH IN THE EVENING.  
* RIDGETOP.............NORTHWEST 20 TO 35 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
   
MONDAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED SNOW SHOWERS IN THE  
MORNING, THEN ISOLATED RAIN SHOWERS AND SNOW SHOWERS IN THE  
AFTERNOON.  
* MAX TEMPERATURE.......38-43.  
* 24 HR TREND.........4 DEGREES COOLER.  
* MIN HUMIDITY..........38-43 PERCENT.  
* 24 HR TREND.........4 PERCENT WETTER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTHWEST WINDS 15 TO 25 MPH. GUSTS UP TO 30  
MPH IN THE AFTERNOON.  
* RIDGETOP.............NORTHWEST 25 TO 40 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................LESS THAN 10 PERCENT.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. LOWS 20 TO 25. NORTHWEST WINDS  
10 TO 20 MPH.    
TUESDAY
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 21 TO 26.  
HIGHS 35 TO 40. NORTH WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 28 TO 33. HIGHS  
38 TO 43. EAST WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 27 TO 32. HIGHS  
38 TO 43. NORTH WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS AND RAIN SHOWERS.  
LOWS 27 TO 32. HIGHS 40 TO 45.    
SATURDAY
 
PARTLY SUNNY. ISOLATED RAIN SHOWERS AND SNOW SHOWERS.  
HIGHS 46 TO 51.  
 

 
 
MTZ132-112215-  
CUSTER COUNTY-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. SNOW LIKELY IN THE MORNING.  
* MAX TEMPERATURE.......41-46.  
* 24 HR TREND.........24 DEGREES COOLER.  
* MIN HUMIDITY..........40-45 PERCENT.  
* 24 HR TREND.........25 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............WINDY. NORTHWEST WINDS 15 TO 30 MPH WITH  
GUSTS TO AROUND 45 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................30 PERCENT.  
* HAINES INDEX..........3.  
   
TONIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY.  
* MIN TEMPERATURE.......23-28.  
* 24 HR TREND.........6 DEGREES COOLER.  
* MAX HUMIDITY..........76-81 PERCENT.  
* 24 HR TREND.........1 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 15 TO 25 MPH. GUSTS UP TO 35  
MPH IN THE EVENING.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
   
MONDAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED SNOW SHOWERS IN  
THE MORNING, THEN ISOLATED SNOW SHOWERS IN THE AFTERNOON.  
* MAX TEMPERATURE.......33-38.  
* 24 HR TREND.........8 DEGREES COOLER.  
* MIN HUMIDITY..........50-55 PERCENT.  
* 24 HR TREND.........10 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 15 TO 25 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................10 PERCENT.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 20 TO  
25. NORTHWEST WINDS 10 TO 20 MPH.    
TUESDAY
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 18 TO 23.  
HIGHS 32 TO 37. NORTH WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 27 TO  
32. HIGHS 36 TO 41. EAST WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLOUDY. SNOW AND RAIN LIKELY. LOWS 29 TO 34.  
HIGHS 37 TO 42. NORTHEAST WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS AND RAIN SHOWERS.  
LOWS 28 TO 33. HIGHS 41 TO 46.    
SATURDAY
 
PARTLY SUNNY. ISOLATED SNOW SHOWERS. HIGHS 46 TO 51.  
 

 
 
MTZ133-112215-  
SIOUX RANGER DISTRICT CUSTER NATIONAL FOREST-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED SNOW SHOWERS IN  
THE MORNING, THEN SCATTERED RAIN SHOWERS AND SNOW SHOWERS IN THE  
AFTERNOON.  
* MAX TEMPERATURE.......45-50.  
* 24 HR TREND.........19 DEGREES COOLER.  
* MIN HUMIDITY..........36-41 PERCENT.  
* 24 HR TREND.........22 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............WINDY. NORTHWEST WINDS 20 TO 35 MPH WITH  
GUSTS TO AROUND 50 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................10 PERCENT.  
* HAINES INDEX..........3.  
   
TONIGHT
 
 
* SKY/WEATHER...........MOSTLY CLEAR.  
* MIN TEMPERATURE.......23-28.  
* 24 HR TREND.........6 DEGREES COOLER.  
* MAX HUMIDITY..........72-77 PERCENT.  
* 24 HR TREND.........5 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............NORTHWEST WINDS 15 TO 25 MPH. GUSTS UP TO 45  
MPH IN THE EVENING DECREASING TO 30 MPH OVERNIGHT.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
   
MONDAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY.  
* MAX TEMPERATURE.......37-42.  
* 24 HR TREND.........8 DEGREES COOLER.  
* MIN HUMIDITY..........41-46 PERCENT.  
* 24 HR TREND.........5 PERCENT WETTER.  
* WIND (20 FT)  
* PLAINS...............WINDY. NORTHWEST WINDS 15 TO 30 MPH WITH  
GUSTS TO AROUND 35 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................LESS THAN 10 PERCENT.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 19 TO  
24. NORTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 30 MPH.    
TUESDAY
 
MOSTLY CLOUDY. LOWS 18 TO 23. HIGHS 36 TO 41. NORTH  
WINDS 10 TO 20 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 27 TO  
32. HIGHS 40 TO 45. EAST WINDS 10 TO 20 MPH.    
THURSDAY
 
MOSTLY CLOUDY. RAIN AND SNOW LIKELY. LOWS 28 TO 33.  
HIGHS 40 TO 45. NORTHEAST WINDS 10 TO 20 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SCATTERED RAIN SHOWERS AND SNOW SHOWERS.  
LOWS 28 TO 33. HIGHS 43 TO 48.    
SATURDAY
 
PARTLY SUNNY. ISOLATED RAIN SHOWERS AND SNOW SHOWERS.  
HIGHS 47 TO 52.  
 

 
 
WYZ274-112215-  
SHERIDAN COUNTY-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........PARTLY SUNNY. SCATTERED SNOW SHOWERS IN THE  
MORNING, THEN ISOLATED SNOW SHOWERS IN THE AFTERNOON.  
* MAX TEMPERATURE.......42-47.  
* 24 HR TREND.........23 DEGREES COOLER.  
* MIN HUMIDITY..........36-41 PERCENT.  
* 24 HR TREND.........24 PERCENT WETTER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........WINDY. NORTHWEST WINDS 15 TO 30 MPH WITH  
GUSTS TO AROUND 40 MPH.  
* RIDGETOP.............NORTHWEST 25 TO 40 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................LESS THAN 10 PERCENT.  
* HAINES INDEX..........2.  
   
TONIGHT
 
 
* SKY/WEATHER...........MOSTLY CLOUDY.  
* MIN TEMPERATURE.......22-27.  
* 24 HR TREND.........2 DEGREES COOLER.  
* MAX HUMIDITY..........67-72 PERCENT.  
* 24 HR TREND.........8 PERCENT DRIER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO 35  
MPH IN THE EVENING.  
* RIDGETOP.............NORTHWEST 15 TO 25 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................ZERO.  
   
MONDAY
 
 
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED RAIN SHOWERS AND  
SNOW SHOWERS IN THE AFTERNOON.  
* MAX TEMPERATURE.......38-43.  
* 24 HR TREND.........4 DEGREES COOLER.  
* MIN HUMIDITY..........35-40 PERCENT.  
* 24 HR TREND.........1 PERCENT DRIER.  
* WIND (20 FT)  
* SLOPE/VALLEY.........NORTHWEST WINDS 15 TO 25 MPH.  
* RIDGETOP.............NORTHWEST 20 TO 35 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................LESS THAN 10 PERCENT.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. ISOLATED SNOW SHOWERS. LOWS 18 TO  
23. NORTHWEST WINDS 10 TO 20 MPH.    
TUESDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 20 TO 25.  
HIGHS 36 TO 41. NORTH WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 25 TO 30. HIGHS  
37 TO 42. EAST WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 25 TO 30. HIGHS  
37 TO 42. NORTHWEST WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 23 TO 28. HIGHS 40 TO  
45.    
SATURDAY
 
PARTLY SUNNY. ISOLATED RAIN SHOWERS AND SNOW SHOWERS.  
HIGHS 43 TO 48.  
 

 
 
WYZ284-112215-  
BIGHORN NATIONAL FOREST-  
135 AM MDT SUN APR 11 2021  
   
TODAY
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. SNOW LIKELY IN THE MORNING,  
THEN SCATTERED SNOW SHOWERS IN THE AFTERNOON.  
* MAX TEMPERATURE.......26-31.  
* 24 HR TREND.........21 DEGREES COOLER.  
* MIN HUMIDITY..........44-49 PERCENT.  
* 24 HR TREND.........26 PERCENT WETTER.  
* WIND (20 FT)  
* AT BURGESS JCT.......NORTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO  
AROUND 35 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................40 PERCENT.  
* HAINES INDEX..........3.  
   
TONIGHT
 
 
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED SNOW SHOWERS IN THE  
EVENING.  
* MIN TEMPERATURE.......8-13.  
* 24 HR TREND.........UNCHANGED.  
* MAX HUMIDITY..........77-82 PERCENT.  
* 24 HR TREND.........17 PERCENT DRIER.  
* WIND (20 FT)  
* AT BURGESS JCT.......NORTHWEST WINDS 5 TO 15 MPH. GUSTS UP TO 30  
MPH IN THE EVENING.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................10 PERCENT.  
   
MONDAY
 
 
* SKY/WEATHER...........CLOUDY WITH ISOLATED SNOW SHOWERS IN THE  
MORNING, THEN PARTLY SUNNY WITH SCATTERED SNOW SHOWERS IN THE  
AFTERNOON.  
* MAX TEMPERATURE.......24-29.  
* 24 HR TREND.........2 DEGREES COOLER.  
* MIN HUMIDITY..........47-52 PERCENT.  
* 24 HR TREND.........3 PERCENT WETTER.  
* WIND (20 FT)  
* AT BURGESS JCT.......NORTHWEST WINDS 10 TO 20 MPH.  
* LAL...................1...NO THUNDERSTORMS.  
* CWR...................20 PERCENT.  
* HAINES INDEX..........2.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
MONDAY NIGHT
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 5 TO  
10. NORTHWEST WINDS 5 TO 15 MPH.    
TUESDAY
 
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS. LOWS 8 TO 13.  
HIGHS 23 TO 28. NORTH WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. SNOW. LOWS 14 TO 19. HIGHS 26 TO 31.  
NORTHEAST WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLOUDY. SNOW. LOWS 13 TO 18. HIGHS 27 TO 32.  
NORTH WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. SNOW LIKELY. LOWS 14 TO 19. HIGHS 30 TO  
35.    
SATURDAY
 
PARTLY SUNNY. SCATTERED SNOW SHOWERS. HIGHS 32 TO 37.  
 

 
 
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