397
FNUS55 KBYZ 120738
FWFBYZ
FIRE WEATHER PLANNING FORECAST FOR SCEN AND SERN MONTANA
NATIONAL WEATHER SERVICE BILLINGS MT
138 AM MDT TUE MAY 12 2026
DISCUSSION
ABOVE NORMAL TEMPERATURES AND MOSTLY DRY CONDITIONS WILL PERSIST
THROUGH THE WORK WEEK. HIGH TEMPERATURES WILL RANGE FROM 70S TO
LOW 90S, WITH WEDNESDAY BEING THE WARMEST. MINIMUM RH VALUES WILL
BE IN THE TEENS AND LOWER 20S THROUGH FRIDAY. MODELS ARE TRENDING
TOWARD A POTENTIAL WIDESPREAD WIND EVENT FOR WEDNESDAY NIGHT AND
THURSDAY, ESPECIALLY OVER THE MOUNTAINS AND FOOTHILLS OF SOUTH
CENTRAL MONTANA...WHILE BACKING OFF ON OUR CHANCE OF SHOWERS AND
THUNDERSTORMS. THERE IS LOW TO MODERATE CONFIDENCE IN WIND GUSTS
REACHING 45 TO 60 MPH (STRONGEST WEST OF BILLINGS) ACROSS SOUTHERN
MT ON THURSDAY WITH RH READINGS IN THE TEENS TO AROUND 20
PERCENT. SO DESPITE THE SPRING GREEN UP IN THESE AREAS...FIRE
WEATHER CONDITIONS WILL BE ELEVATED.
THE PATTERN LOOKS TO REMAIN PROGRESSIVE, AND STILL FAVORS A
CHANCE OF SHOWERS AND THUNDERSTORMS FOR THE WEEKEND AS ANOTHER
WEATHER SYSTEM MOVES THROUGH THE ROCKIES AND HIGH PLAINS. BT
MTZ123-122215-
GALLATIN NATIONAL FOREST-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......74-84 AT 5000 FEET...60-70 AT 7000 FEET.
* 24 HR TREND.........1 DEGREE WARMER.
* MIN HUMIDITY..........13-18 PERCENT.
* 24 HR TREND.........4 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHWEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......45-50.
* 24 HR TREND.........7 DEGREES WARMER.
* MAX HUMIDITY..........44-54 PERCENT AT 5000 FEET...42-52 PERCENT
AT 7000 FEET.
* 24 HR TREND.........8 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTH 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........MOSTLY SUNNY. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.......81-88 AT 5000 FEET...67-77 AT 7000 FEET.
* 24 HR TREND.........6 DEGREES WARMER.
* MIN HUMIDITY..........14-21 PERCENT AT 5000 FEET...15-25 PERCENT
AT 7000 FEET.
* 24 HR TREND.........1 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 10 TO 20 MPH. GUSTS UP TO 35 MPH
IN THE AFTERNOON.
* RIDGETOP.............SOUTH 15 TO 30 MPH.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
COLDER. MOSTLY CLOUDY. SCATTERED SHOWERS, SNOW
SHOWERS AND ISOLATED THUNDERSTORMS. LOWS 41 TO 51. SOUTHWEST
WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 35 MPH.
THURSDAY
MUCH COOLER. MOSTLY CLEAR. ISOLATED SNOW SHOWERS.
LOWS 37 TO 47. HIGHS 60 TO 70. WEST WINDS 5 TO 15 MPH WITH GUSTS
TO AROUND 30 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 36 TO 46. HIGHS 65 TO 74. SOUTHWEST
WINDS 5 TO 10 MPH WITH GUSTS TO AROUND 30 MPH.
SATURDAY
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 29 TO 39. HIGHS 56 TO 66. WEST WINDS 5 TO
10 MPH.
SUNDAY
MOSTLY CLOUDY. SCATTERED SNOW SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 28 TO 37. HIGHS 50 TO 58.
MONDAY
NOT AS COOL. MOSTLY SUNNY. ISOLATED SHOWERS,
THUNDERSTORMS AND SNOW SHOWERS. HIGHS 59 TO 66.
MTZ124-122215-
WHEATLAND COUNTY/SWEET GRASS COUNTY-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......72-77.
* 24 HR TREND.........1 DEGREE COOLER.
* MIN HUMIDITY..........22-27 PERCENT.
* 24 HR TREND.........12 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......42-47.
* 24 HR TREND.........4 DEGREES WARMER.
* MAX HUMIDITY..........57-62 PERCENT.
* 24 HR TREND.........9 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 10 TO 20 MPH IN THE EVENING
SHIFTING TO THE NORTH 5 TO 10 MPH OVERNIGHT.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........MOSTLY SUNNY. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.......84-89.
* 24 HR TREND.........12 DEGREES WARMER.
* MIN HUMIDITY..........19-24 PERCENT.
* 24 HR TREND.........3 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTH WINDS 5 TO 10 MPH IN THE MORNING
INCREASING TO SOUTHEAST 15 TO 25 MPH WITH GUSTS TO AROUND 30 MPH
IN THE AFTERNOON.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
WINDY. MOSTLY CLOUDY. SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS 44 TO 49. WEST WINDS 20 TO 35 MPH
WITH GUSTS TO AROUND 50 MPH.
THURSDAY
MUCH COOLER. WINDY. MOSTLY CLEAR. ISOLATED SHOWERS.
LOWS 40 TO 45. HIGHS 62 TO 67. WEST WINDS 20 TO 35 MPH WITH GUSTS
TO AROUND 55 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 39 TO 44. HIGHS 67 TO 72. WEST
WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 40 MPH.
SATURDAY
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 33 TO 38.
HIGHS 59 TO 64. WEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND
40 MPH.
SUNDAY
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 31 TO 36. HIGHS
53 TO 58.
MONDAY
WARMER. MOSTLY SUNNY. HIGHS 61 TO 66.
MTZ125-122215-
STILLWATER COUNTY-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......74-79.
* 24 HR TREND.........4 DEGREES COOLER.
* MIN HUMIDITY..........22-27 PERCENT.
* 24 HR TREND.........5 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......46-51.
* 24 HR TREND.........4 DEGREES WARMER.
* MAX HUMIDITY..........46-51 PERCENT.
* 24 HR TREND.........15 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE WEST OVERNIGHT.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........PARTLY SUNNY.
* MAX TEMPERATURE.......86-91.
* 24 HR TREND.........12 DEGREES WARMER.
* MIN HUMIDITY..........13-18 PERCENT.
* 24 HR TREND.........9 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTH WINDS 5 TO 10 MPH IN THE MORNING
INCREASING TO 10 TO 20 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...7 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
PARTLY CLOUDY. ISOLATED SHOWERS AND
THUNDERSTORMS. LOWS 49 TO 54. WEST WINDS 15 TO 25 MPH WITH GUSTS
TO AROUND 30 MPH.
THURSDAY
NOT AS WARM. MOSTLY CLEAR. LOWS 42 TO 47. HIGHS 69 TO
74. WEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 50 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 42 TO 47. HIGHS 73 TO 78. WEST
WINDS 5 TO 15 MPH.
SATURDAY
MOSTLY CLOUDY. NUMEROUS SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 36 TO 41. HIGHS 67 TO 72. NORTHWEST WINDS
5 TO 15 MPH WITH GUSTS TO AROUND 35 MPH.
SUNDAY
COOLER. MOSTLY CLOUDY. SCATTERED SHOWERS, SNOW SHOWERS
AND ISOLATED THUNDERSTORMS. LOWS 33 TO 38. HIGHS 56 TO 61.
MONDAY
WARMER. MOSTLY SUNNY. ISOLATED SHOWERS, THUNDERSTORMS
AND SNOW SHOWERS. HIGHS 64 TO 69.
MTZ126-122215-
BEARTOOTH RANGER DISTRICT CUSTER NATIONAL FOREST-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......67-77 AT 5000 FEET...59-69 AT 7000 FEET.
* 24 HR TREND.........5 DEGREES COOLER.
* MIN HUMIDITY..........19-28 PERCENT AT 5000 FEET...27-37 PERCENT
AT 7000 FEET.
* 24 HR TREND.........14 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHEAST WINDS 5 TO 15 MPH.
* RIDGETOP.............EAST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......47-57 AT 5000 FEET...43-53 AT 7000 FEET.
* 24 HR TREND.........10 DEGREES WARMER.
* MAX HUMIDITY..........44-49 PERCENT.
* 24 HR TREND.........18 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........WEST WINDS 5 TO 15 MPH.
* RIDGETOP.............EAST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......80-90 AT 5000 FEET...71-81 AT 7000 FEET.
* 24 HR TREND.........12 DEGREES WARMER.
* MIN HUMIDITY..........13-19 PERCENT AT 5000 FEET...17-25 PERCENT
AT 7000 FEET.
* 24 HR TREND.........15 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHWEST WINDS 10 TO 20 MPH IN THE MORNING
INCREASING TO SOUTH 15 TO 25 MPH WITH GUSTS TO AROUND 40 MPH IN
THE AFTERNOON.
* RIDGETOP.............SOUTH 20 TO 35 MPH.
* CHANCE OF LIGHTNING...8 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 49 TO
54. SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 35 MPH.
THURSDAY
COOLER. MOSTLY CLEAR. LOWS 42 TO 48. HIGHS 63 TO 72.
WEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 55 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 42 TO 49. HIGHS 66 TO 75. WEST WINDS
10 TO 20 MPH WITH GUSTS TO AROUND 35 MPH.
SATURDAY
MOSTLY CLOUDY. NUMEROUS SNOW SHOWERS, SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS 36 TO 41. HIGHS 63 TO 71. WEST WINDS
15 TO 25 MPH WITH GUSTS TO AROUND 50 MPH.
SUNDAY
COLDER. MOSTLY CLOUDY. SCATTERED SNOW SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS 34 TO 39. HIGHS 50 TO 57.
MONDAY
MOSTLY SUNNY. ISOLATED THUNDERSTORMS AND SNOW SHOWERS.
HIGHS 56 TO 65.
MTZ127-122215-
GOLDEN VALLEY COUNTY/MUSSELSHELL COUNTY-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......68-73.
* 24 HR TREND.........4 DEGREES COOLER.
* MIN HUMIDITY..........22-27 PERCENT.
* 24 HR TREND.........5 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE SOUTHEAST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......51-56.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........39-44 PERCENT.
* 24 HR TREND.........14 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......83-88.
* 24 HR TREND.........15 DEGREES WARMER.
* MIN HUMIDITY..........18-23 PERCENT.
* 24 HR TREND.........4 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 10 TO 20 MPH. GUSTS UP TO 30
MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 55 TO
60. WEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 40 MPH.
THURSDAY
COOLER, WINDY. MOSTLY CLEAR. ISOLATED SHOWERS. LOWS
48 TO 53. HIGHS 64 TO 69. WEST WINDS 15 TO 30 MPH WITH GUSTS TO
AROUND 50 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS 67 TO 72. NORTHWEST
WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 35 MPH.
SATURDAY
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 42 TO 47.
HIGHS 62 TO 67. NORTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND
30 MPH.
SUNDAY
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 37 TO 42. HIGHS
53 TO 58.
MONDAY
MOSTLY SUNNY. HIGHS 60 TO 65.
MTZ128-122215-
YELLOWSTONE COUNTY-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......74-79.
* 24 HR TREND.........5 DEGREES COOLER.
* MIN HUMIDITY..........20-25 PERCENT.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......47-52.
* 24 HR TREND.........2 DEGREES WARMER.
* MAX HUMIDITY..........55-60 PERCENT.
* 24 HR TREND.........1 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......90-95.
* 24 HR TREND.........16 DEGREES WARMER.
* MIN HUMIDITY..........13-18 PERCENT.
* 24 HR TREND.........7 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
INCREASING TO SOUTHEAST 10 TO 20 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...5 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 54 TO
59. WEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 35 MPH.
THURSDAY
NOT AS WARM. MOSTLY CLEAR. ISOLATED SHOWERS. LOWS
46 TO 51. HIGHS 71 TO 76. WEST WINDS 15 TO 25 MPH WITH GUSTS TO
AROUND 50 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 46 TO 51. HIGHS 75 TO 80. NORTHWEST
WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH.
SATURDAY
MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 40 TO 45. HIGHS 69 TO 74. NORTHWEST WINDS
5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH.
SUNDAY
COOLER. MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 36 TO 41.
HIGHS 59 TO 64.
MONDAY
WARMER. MOSTLY SUNNY. HIGHS 67 TO 72.
MTZ129-122215-
CROW INDIAN RESERVATION/BIGHORN CANYON REC AREA-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......65-75 AT 5000 FEET...59-65 AT 7000 FEET.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........22-32 PERCENT AT 5000 FEET...32-38 PERCENT
AT 7000 FEET.
* 24 HR TREND.........10 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHEAST WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHEAST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......51-56.
* 24 HR TREND.........6 DEGREES WARMER.
* MAX HUMIDITY..........37-42 PERCENT.
* 24 HR TREND.........18 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 10 TO 20 MPH.
* RIDGETOP.............EAST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......79-89 AT 5000 FEET...73-79 AT 7000 FEET.
* 24 HR TREND.........16 DEGREES WARMER.
* MIN HUMIDITY..........12-19 PERCENT AT 5000 FEET...16-21 PERCENT
AT 7000 FEET.
* 24 HR TREND.........8 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 10 TO 20 MPH.
* RIDGETOP.............SOUTHEAST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...5 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 48 TO
58. SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.
THURSDAY
COOLER. MOSTLY CLEAR. ISOLATED SHOWERS. LOWS 41 TO
48. HIGHS 61 TO 71. WEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND
45 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 42 TO 49. HIGHS 65 TO 75. NORTHWEST
WINDS 5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 36 TO 43. HIGHS 62 TO 72. NORTHWEST WINDS
10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.
SUNDAY
COOLER. MOSTLY CLOUDY. SCATTERED SHOWERS, SNOW SHOWERS
AND ISOLATED THUNDERSTORMS. LOWS 33 TO 38. HIGHS 48 TO 58.
MONDAY
MOSTLY SUNNY. ISOLATED SHOWERS AND SNOW SHOWERS. HIGHS
56 TO 66.
MTZ130-122215-
NORTHERN ROSEBUD/NORTHERN TREASURE COUNTIES-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......71-76.
* 24 HR TREND.........6 DEGREES COOLER.
* MIN HUMIDITY..........17-22 PERCENT.
* 24 HR TREND.........1 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......43-48.
* 24 HR TREND.........1 DEGREE WARMER.
* MAX HUMIDITY..........44-49 PERCENT.
* 24 HR TREND.........22 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......89-94.
* 24 HR TREND.........18 DEGREES WARMER.
* MIN HUMIDITY..........17-22 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 51 TO
56. SOUTHWEST WINDS 10 TO 20 MPH.
THURSDAY
NOT AS WARM. MOSTLY CLEAR. ISOLATED SHOWERS. LOWS
45 TO 50. HIGHS 71 TO 76. WEST WINDS 15 TO 25 MPH WITH GUSTS TO
AROUND 40 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 73 TO 78. NORTHWEST
WINDS 5 TO 15 MPH.
SATURDAY
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 40 TO 45.
HIGHS 70 TO 75. NORTH WINDS 5 TO 15 MPH.
SUNDAY
COOLER. MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 35 TO 40.
HIGHS 59 TO 64.
MONDAY
MOSTLY SUNNY. HIGHS 65 TO 70.
MTZ131-122215-
NORTHERN CHEYENNE INDIAN RESERVATION/ASHLAND RANGER DISTRICT
CUSTER NATL FOREST-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......71-76.
* 24 HR TREND.........6 DEGREES COOLER.
* MIN HUMIDITY..........18-23 PERCENT.
* 24 HR TREND.........1 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTH 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......41-46.
* 24 HR TREND.........1 DEGREE WARMER.
* MAX HUMIDITY..........46-51 PERCENT.
* 24 HR TREND.........16 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTHEAST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......89-94.
* 24 HR TREND.........18 DEGREES WARMER.
* MIN HUMIDITY..........13-18 PERCENT.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 10 TO 20 MPH.
* RIDGETOP.............SOUTHEAST 15 TO 25 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 51 TO
56. SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.
THURSDAY
NOT AS WARM. MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 71 TO
76. WEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 40 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 73 TO 78. NORTHWEST
WINDS 5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 37 TO 42. HIGHS 72 TO 77. NORTHWEST WINDS
5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH.
SUNDAY
COOLER. MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 33 TO
38. HIGHS 56 TO 61.
MONDAY
PARTLY SUNNY. ISOLATED SHOWERS. HIGHS 63 TO 68.
MTZ132-122215-
CUSTER COUNTY-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......69-74.
* 24 HR TREND.........6 DEGREES COOLER.
* MIN HUMIDITY..........16-21 PERCENT.
* 24 HR TREND.........2 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........UNCHANGED.
* MAX HUMIDITY..........41-46 PERCENT.
* 24 HR TREND.........19 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE SOUTHEAST 5 TO 15 MPH OVERNIGHT.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......82-87.
* 24 HR TREND.........13 DEGREES WARMER.
* MIN HUMIDITY..........18-23 PERCENT.
* 24 HR TREND.........2 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 10 TO 20 MPH. GUSTS UP TO 30
MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 54 TO
59. SOUTH WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 30 MPH.
THURSDAY
NOT AS WARM. MOSTLY CLEAR. ISOLATED SHOWERS. LOWS
46 TO 51. HIGHS 69 TO 74. WEST WINDS 15 TO 25 MPH WITH GUSTS TO
AROUND 40 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 70 TO 75. NORTHWEST
WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.
SATURDAY
MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 41 TO 46. HIGHS 71 TO 76. NORTH WINDS 10 TO
20 MPH WITH GUSTS TO AROUND 30 MPH.
SUNDAY
COOLER. MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 35 TO 40.
HIGHS 56 TO 61.
MONDAY
MOSTLY SUNNY. HIGHS 60 TO 65.
MTZ133-122215-
SIOUX RANGER DISTRICT CUSTER NATIONAL FOREST-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......69-74.
* 24 HR TREND.........8 DEGREES COOLER.
* MIN HUMIDITY..........18-23 PERCENT.
* 24 HR TREND.........2 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......42-47.
* 24 HR TREND.........1 DEGREE COOLER.
* MAX HUMIDITY..........49-54 PERCENT.
* 24 HR TREND.........12 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE SOUTH OVERNIGHT.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......82-87.
* 24 HR TREND.........13 DEGREES WARMER.
* MIN HUMIDITY..........22-27 PERCENT.
* 24 HR TREND.........4 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 10 TO 20 MPH IN THE MORNING
INCREASING TO 15 TO 25 MPH IN THE AFTERNOON. GUSTS UP TO 35 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 53 TO
58. SOUTH WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 35 MPH.
THURSDAY
NOT AS WARM. MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 71 TO
76. WEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 45 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 71 TO 76. NORTHWEST
WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 40 MPH.
SATURDAY
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 40 TO 45. HIGHS 75 TO 80. NORTHEAST WINDS
10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.
SUNDAY
COOLER. MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 34 TO 39.
HIGHS 58 TO 63.
MONDAY
MOSTLY SUNNY. HIGHS 61 TO 66.
WYZ274-122215-
SHERIDAN COUNTY-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......71-76.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........26-31 PERCENT.
* 24 HR TREND.........5 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHEAST WINDS 5 TO 10 MPH.
* RIDGETOP.............EAST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......40-45.
* 24 HR TREND.........2 DEGREES WARMER.
* MAX HUMIDITY..........60-65 PERCENT.
* 24 HR TREND.........13 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE SOUTHWEST OVERNIGHT.
* RIDGETOP.............EAST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......87-92.
* 24 HR TREND.........16 DEGREES WARMER.
* MIN HUMIDITY..........14-19 PERCENT.
* 24 HR TREND.........12 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 15 MPH.
* RIDGETOP.............SOUTH 10 TO 20 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 45 TO
50. SOUTHWEST WINDS 5 TO 15 MPH.
THURSDAY
NOT AS WARM. MOSTLY CLEAR. LOWS 37 TO 42. HIGHS 71 TO
76. WEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 40 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 39 TO 44. HIGHS 71 TO 76. WEST WINDS
5 TO 10 MPH.
SATURDAY
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 34 TO 39. HIGHS 72 TO 77. NORTHWEST WINDS
10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.
SUNDAY
COOLER. MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 30 TO 35. HIGHS 55 TO 60.
MONDAY
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS. HIGHS
62 TO 67.
WYZ284-122215-
BIGHORN NATIONAL FOREST-
138 AM MDT TUE MAY 12 2026
TODAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......57-62.
* 24 HR TREND.........7 DEGREES COOLER.
* MIN HUMIDITY..........33-38 PERCENT.
* 24 HR TREND.........19 PERCENT WETTER.
* WIND (20 FT)
* AT BURGESS JCT.......NORTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......39-44.
* 24 HR TREND.........9 DEGREES WARMER.
* MAX HUMIDITY..........52-57 PERCENT.
* 24 HR TREND.........20 PERCENT DRIER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
WEDNESDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......70-75.
* 24 HR TREND.........13 DEGREES WARMER.
* MIN HUMIDITY..........16-21 PERCENT.
* 24 HR TREND.........17 PERCENT DRIER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTH WINDS 5 TO 15 MPH IN THE MORNING
INCREASING TO 15 TO 25 MPH WITH GUSTS TO AROUND 35 MPH IN THE
AFTERNOON.
* CHANCE OF LIGHTNING...8 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY NIGHT
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 38 TO
43. SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 35 MPH.
THURSDAY
COOLER. MOSTLY CLEAR. ISOLATED SNOW SHOWERS. LOWS
31 TO 36. HIGHS 53 TO 58. WEST WINDS 10 TO 20 MPH WITH GUSTS TO
AROUND 50 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 35 TO 40. HIGHS 55 TO 60. WEST WINDS
10 TO 20 MPH WITH GUSTS TO AROUND 40 MPH.
SATURDAY
PARTLY CLOUDY. SCATTERED SHOWERS, SNOW SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS 25 TO 30. HIGHS 55 TO 60. WEST WINDS
10 TO 20 MPH WITH GUSTS TO AROUND 45 MPH.
SUNDAY
COLDER. MOSTLY CLOUDY. NUMEROUS SNOW SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS 22 TO 27. HIGHS 39 TO 44.
MONDAY
PARTLY SUNNY. SCATTERED SNOW SHOWERS AND ISOLATED
THUNDERSTORMS. HIGHS 45 TO 50.
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