Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Billings, MT
Issued by NWS Billings, MT
891 FNUS55 KBYZ 212013 FWFBYZ Fire Weather Planning Forecast for SCen and SErn Montana National Weather Service Billings MT 213 PM MDT Thu Aug 21 2025 .DISCUSSION... ...Cooler and drier conditions through the weekend... Isolated to scattered showers and thunderstorms possible in southeast Montana and northeastern Wyoming this evening and overnight. Some storms may be strong, with the main risks being gusty winds and large hail. Cooler and drier conditions will begin Friday and continue through the weekend. Matos MTZ123-221015- Gallatin National Forest- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Mostly clear. Areas of smoke in the evening, then haze overnight. * Min temperature.......48-56 at 5000 feet...43-52 at 7000 feet. * 24 hr trend.........1 degree cooler. * Max humidity..........77-87 percent at 5000 feet...70-80 percent at 7000 feet. * 24 hr trend.........2 percent wetter. * Wind (20 ft) * Slope/valley.........East winds 5 to 10 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .FRIDAY... * Sky/weather...........Sunny. * Max temperature.......73-83 at 5000 feet...63-73 at 7000 feet. * 24 hr trend.........3 degrees cooler. * Min humidity..........30-35 percent. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Slope/valley.........Northeast winds 5 to 10 mph. * Ridgetop.............Northeast 5 to 10 mph. * Chance of lightning...1 percent. * CWR...................Zero. .FRIDAY NIGHT... * Sky/weather...........Mostly clear. * Min temperature.......45-50. * 24 hr trend.........3 degrees cooler. * Max humidity..........64-69 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 10 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......75-85 at 5000 feet...66-76 at 7000 feet. * 24 hr trend.........3 degrees warmer. * Min humidity..........19-24 percent. * 24 hr trend.........11 percent drier. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 10 mph in the morning shifting to the north in the afternoon. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...1 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Partly cloudy. Lows 43 to 53. East winds 5 to 10 mph. .SUNDAY...Mostly cloudy. Lows 44 to 54. Highs 75 to 85. East winds 5 to 10 mph. .MONDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 45 to 55. Highs 72 to 82. East winds 5 to 10 mph. .TUESDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows 48 to 58. Highs 75 to 84. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 48 to 58. Highs 75 to 85. .THURSDAY...Partly sunny. Scattered showers and isolated thunderstorms. Highs 73 to 82. $$ MTZ124-221015- Wheatland County/Sweet Grass County- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Mostly clear. * Min temperature.......50-55. * 24 hr trend.........8 degrees cooler. * Max humidity..........73-78 percent. * 24 hr trend.........8 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...3 percent. * CWR...................Zero. .FRIDAY... * Sky/weather...........Mostly sunny. * Max temperature.......72-77. * 24 hr trend.........6 degrees cooler. * Min humidity..........31-36 percent. * 24 hr trend.........3 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 15 mph. * Chance of lightning...3 percent. * CWR...................Zero. .FRIDAY NIGHT... * Sky/weather...........Mostly clear. * Min temperature.......44-49. * 24 hr trend.........6 degrees cooler. * Max humidity..........79-84 percent. * 24 hr trend.........6 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......75-80. * 24 hr trend.........3 degrees warmer. * Min humidity..........30-35 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............East winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Partly cloudy. Lows 44 to 49. East winds 5 to 15 mph. .SUNDAY...Partly cloudy. Lows 44 to 49. Highs 75 to 80. East winds 5 to 15 mph. .MONDAY...Partly cloudy. Lows 45 to 50. Highs 76 to 81. East winds 5 to 15 mph. .TUESDAY...Partly cloudy. Lows 50 to 55. Highs 79 to 84. Southeast winds 5 to 15 mph. .WEDNESDAY...Partly cloudy. Lows 50 to 55. Highs 81 to 86. .THURSDAY...Mostly sunny. Isolated showers and thunderstorms. Highs 79 to 84. $$ MTZ125-221015- Stillwater County- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Mostly clear. * Min temperature.......53-58. * 24 hr trend.........4 degrees cooler. * Max humidity..........74-79 percent. * 24 hr trend.........14 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 10 mph in the evening shifting to the west overnight. * Chance of lightning...2 percent. * CWR...................Zero. .FRIDAY... * Sky/weather...........Mostly sunny. * Max temperature.......73-78. * 24 hr trend.........8 degrees cooler. * Min humidity..........32-37 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...6 percent. * CWR...................Zero. .FRIDAY NIGHT... * Sky/weather...........Mostly clear. * Min temperature.......47-52. * 24 hr trend.........6 degrees cooler. * Max humidity..........72-77 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............East winds 5 to 15 mph in the evening shifting to the southwest 5 to 10 mph overnight. * Chance of lightning...2 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......78-83. * 24 hr trend.........5 degrees warmer. * Min humidity..........28-33 percent. * 24 hr trend.........4 percent drier. * Wind (20 ft) * Plains...............Light winds in the morning becoming northeast 5 to 10 mph in the afternoon. * Chance of lightning...2 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Partly cloudy. Lows 48 to 53. East winds 5 to 10 mph. .SUNDAY...Partly cloudy. Lows 48 to 53. Highs 77 to 82. Northeast winds 5 to 10 mph. .MONDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 49 to 54. Highs 77 to 82. East winds 5 to 10 mph. .TUESDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows 52 to 57. Highs 79 to 84. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 53 to 58. Highs 80 to 85. .THURSDAY...Partly sunny. Scattered showers and isolated thunderstorms. Highs 79 to 84. $$ MTZ126-221015- Beartooth Ranger District Custer National Forest- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Mostly clear. * Min temperature.......54-60 at 5000 feet...45-55 at 7000 feet. * 24 hr trend.........3 degrees cooler. * Max humidity..........64-74 percent at 5000 feet...70-80 percent at 7000 feet. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Slope/valley.........North winds 5 to 15 mph. * Ridgetop.............Light winds. * Chance of lightning...7 percent. * CWR...................Zero. .FRIDAY... * Sky/weather...........Mostly sunny. * Max temperature.......69-79 at 5000 feet...59-69 at 7000 feet. * 24 hr trend.........6 degrees cooler. * Min humidity..........38-48 percent at 5000 feet...43-53 percent at 7000 feet. * 24 hr trend.........6 percent wetter. * Wind (20 ft) * Slope/valley.........Northeast winds 5 to 15 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...13 percent. * CWR...................Zero. .FRIDAY NIGHT... * Sky/weather...........Mostly clear. * Min temperature.......48-58 at 5000 feet...42-52 at 7000 feet. * 24 hr trend.........5 degrees cooler. * Max humidity..........60-70 percent at 5000 feet...66-76 percent at 7000 feet. * 24 hr trend.........3 percent drier. * Wind (20 ft) * Slope/valley.........North winds 5 to 15 mph in the evening shifting to the west 5 to 10 mph overnight. * Ridgetop.............Light winds. * Chance of lightning...5 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......74-82 at 5000 feet...64-74 at 7000 feet. * 24 hr trend.........7 degrees warmer. * Min humidity..........29-39 percent at 5000 feet...34-44 percent at 7000 feet. * 24 hr trend.........9 percent drier. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph in the morning shifting to the northeast 5 to 15 mph in the afternoon. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...5 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Partly cloudy. Lows 49 to 57. Northwest winds 5 to 15 mph. .SUNDAY...Mostly cloudy. Lows 49 to 58. Highs 73 to 81. North winds 5 to 15 mph. .MONDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 50 to 59. Highs 72 to 80. Northwest winds 5 to 10 mph. .TUESDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 53 to 61. Highs 73 to 82. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 54 to 62. Highs 75 to 83. .THURSDAY...Partly sunny. Scattered showers and isolated thunderstorms. Highs 73 to 81. $$ MTZ127-221015- Golden Valley County/Musselshell county- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......56-61. * 24 hr trend.........4 degrees cooler. * Max humidity..........56-61 percent. * 24 hr trend.........7 percent drier. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...3 percent. * CWR...................Zero. .FRIDAY... * Sky/weather...........Mostly sunny. * Max temperature.......70-75. * 24 hr trend.........7 degrees cooler. * Min humidity..........32-37 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...2 percent. * CWR...................Zero. .FRIDAY NIGHT... * Sky/weather...........Mostly clear. * Min temperature.......51-56. * 24 hr trend.........5 degrees cooler. * Max humidity..........56-61 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............Northeast winds 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......74-79. * 24 hr trend.........4 degrees warmer. * Min humidity..........31-36 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............East winds 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Mostly clear. Lows 51 to 56. Northeast winds 5 to 15 mph. .SUNDAY...Partly cloudy. Lows 50 to 55. Highs 73 to 78. East winds 5 to 15 mph. .MONDAY...Partly cloudy. Lows 52 to 57. Highs 74 to 79. East winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 57 to 62. Highs 79 to 84. East winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Lows 57 to 62. Highs 80 to 85. .THURSDAY...Mostly sunny. Highs 80 to 85. $$ MTZ128-221015- Yellowstone County- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......58-63. * 24 hr trend.........7 degrees cooler. * Max humidity..........59-64 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...4 percent. * CWR...................Zero. .FRIDAY... * Sky/weather...........Mostly sunny. * Max temperature.......76-81. * 24 hr trend.........7 degrees cooler. * Min humidity..........28-33 percent. * 24 hr trend.........3 percent drier. * Wind (20 ft) * Plains...............Northeast winds 10 to 20 mph. * Chance of lightning...3 percent. * CWR...................Zero. .FRIDAY NIGHT... * Sky/weather...........Mostly clear. * Min temperature.......52-57. * 24 hr trend.........6 degrees cooler. * Max humidity..........59-64 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......80-85. * 24 hr trend.........4 degrees warmer. * Min humidity..........27-32 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............East winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Partly cloudy. Lows 51 to 56. Northeast winds 5 to 15 mph. .SUNDAY...Partly cloudy. Lows 51 to 56. Highs 79 to 84. East winds 5 to 15 mph. .MONDAY...Partly cloudy. Lows 53 to 58. Highs 79 to 84. Northeast winds 5 to 15 mph. .TUESDAY...Partly cloudy. Lows 56 to 61. Highs 83 to 88. Northeast winds 5 to 10 mph. .WEDNESDAY...Mostly cloudy. Lows 57 to 62. Highs 83 to 88. .THURSDAY...Mostly sunny. Isolated showers and thunderstorms. Highs 84 to 89. $$ MTZ129-221015- Crow Indian Reservation/Bighorn Canyon Rec Area- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Mostly cloudy with scattered showers and thunderstorms. * Min temperature.......55-60 at 5000 feet...51-56 at 7000 feet. * 24 hr trend.........5 degrees cooler. * Max humidity..........75-80 percent. * 24 hr trend.........12 percent wetter. * Wind (20 ft) * Slope/valley.........East winds 5 to 15 mph. * Ridgetop.............South 5 to 15 mph. * Chance of lightning...34 percent. * CWR...................10 percent. .FRIDAY... * Sky/weather...........Mostly cloudy. Isolated rain showers in the morning. * Max temperature.......67-77 at 5000 feet...57-66 at 7000 feet. * 24 hr trend.........7 degrees cooler. * Min humidity..........41-51 percent at 5000 feet...51-61 percent at 7000 feet. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Slope/valley.........Northeast winds 5 to 15 mph. * Ridgetop.............Light winds. * Chance of lightning...13 percent. * CWR...................10 percent. .FRIDAY NIGHT... * Sky/weather...........Partly cloudy. * Min temperature.......50-58 at 5000 feet...48-53 at 7000 feet. * 24 hr trend.........3 degrees cooler. * Max humidity..........61-71 percent at 5000 feet...63-73 percent at 7000 feet. * 24 hr trend.........22 percent drier. * Wind (20 ft) * Slope/valley.........East winds 5 to 15 mph. * Ridgetop.............South 5 to 10 mph. * Chance of lightning...8 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......72-82 at 5000 feet...63-71 at 7000 feet. * 24 hr trend.........3 degrees warmer. * Min humidity..........29-39 percent at 5000 feet...40-50 percent at 7000 feet. * 24 hr trend.........3 percent drier. * Wind (20 ft) * Slope/valley.........East winds 5 to 15 mph. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...1 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Mostly clear. Lows 50 to 56. East winds 5 to 15 mph. .SUNDAY...Partly cloudy. Lows 51 to 58. Highs 70 to 80. East winds 5 to 15 mph. .MONDAY...Partly cloudy. Lows 52 to 59. Highs 70 to 80. East winds 5 to 15 mph. .TUESDAY...Partly cloudy. Lows 55 to 61. Highs 72 to 82. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly cloudy. Lows 56 to 62. Highs 73 to 83. .THURSDAY...Partly sunny. Highs 72 to 82. $$ MTZ130-221015- Northern Rosebud/Northern Treasure Counties- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......59-64. * 24 hr trend.........7 degrees cooler. * Max humidity..........59-64 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...13 percent. * CWR...................Zero. .FRIDAY... * Sky/weather...........Mostly sunny. * Max temperature.......76-81. * 24 hr trend.........7 degrees cooler. * Min humidity..........22-27 percent. * 24 hr trend.........4 percent drier. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...2 percent. * CWR...................Zero. .FRIDAY NIGHT... * Sky/weather...........Mostly clear. * Min temperature.......52-57. * 24 hr trend.........7 degrees cooler. * Max humidity..........60-65 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......77-82. * 24 hr trend.........1 degree warmer. * Min humidity..........26-31 percent. * 24 hr trend.........4 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Mostly clear. Lows 49 to 54. Northeast winds 5 to 10 mph. .SUNDAY...Mostly clear. Lows 50 to 55. Highs 76 to 81. East winds 5 to 15 mph. .MONDAY...Mostly clear. Lows 51 to 56. Highs 78 to 83. East winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 56 to 61. Highs 83 to 88. East winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Lows 56 to 61. Highs 84 to 89. .THURSDAY...Mostly sunny. Highs 84 to 89. $$ MTZ131-221015- Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Mostly cloudy with scattered showers and thunderstorms. * Min temperature.......58-63. * 24 hr trend.........11 degrees cooler. * Max humidity..........81-86 percent. * 24 hr trend.........26 percent wetter. * Wind (20 ft) * Slope/valley.........Northeast winds 5 to 15 mph. * Ridgetop.............South 5 to 10 mph. * Chance of lightning...45 percent. * CWR...................40 percent. .FRIDAY... * Sky/weather...........Mostly cloudy. Scattered rain showers in the morning. * Max temperature.......76-81. * 24 hr trend.........6 degrees cooler. * Min humidity..........29-34 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Slope/valley.........Northeast winds 5 to 15 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...13 percent. * CWR...................Less than 10 percent. .FRIDAY NIGHT... * Sky/weather...........Partly cloudy. * Min temperature.......53-58. * 24 hr trend.........5 degrees cooler. * Max humidity..........59-64 percent. * 24 hr trend.........22 percent drier. * Wind (20 ft) * Slope/valley.........Northeast winds 5 to 10 mph. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...5 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Mostly sunny. * Max temperature.......77-82. * 24 hr trend.........1 degree warmer. * Min humidity..........29-34 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Slope/valley.........East winds 5 to 10 mph. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...1 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Mostly clear. Lows 49 to 54. Northeast winds 5 to 15 mph. .SUNDAY...Mostly clear. Lows 48 to 53. Highs 75 to 80. East winds 5 to 15 mph. .MONDAY...Partly cloudy. Lows 51 to 56. Highs 77 to 82. East winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 54 to 59. Highs 80 to 85. Southeast winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Lows 54 to 59. Highs 81 to 86. .THURSDAY...Mostly sunny. Highs 81 to 86. $$ MTZ132-221015- Custer County- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Partly cloudy. Isolated showers and thunderstorms overnight. * Min temperature.......58-63. * 24 hr trend.........6 degrees cooler. * Max humidity..........66-71 percent. * 24 hr trend.........8 percent drier. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...16 percent. * CWR...................Less than 10 percent. .FRIDAY... * Sky/weather...........Sunny. * Max temperature.......74-79. * 24 hr trend.........7 degrees cooler. * Min humidity..........27-32 percent. * 24 hr trend.........6 percent drier. * Wind (20 ft) * Plains...............North winds 10 to 20 mph. * Chance of lightning...2 percent. * CWR...................Zero. .FRIDAY NIGHT... * Sky/weather...........Mostly clear. * Min temperature.......49-54. * 24 hr trend.........9 degrees cooler. * Max humidity..........70-75 percent. * 24 hr trend.........4 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......72-77. * 24 hr trend.........2 degrees cooler. * Min humidity..........27-32 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............Northeast winds 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Mostly clear. Lows 47 to 52. Northeast winds 5 to 10 mph. .SUNDAY...Mostly clear. Lows 47 to 52. Highs 70 to 75. East winds 5 to 15 mph. .MONDAY...Mostly clear. Lows 50 to 55. Highs 73 to 78. Southeast winds 5 to 15 mph. .TUESDAY...Mostly clear. Lows 55 to 60. Highs 77 to 82. Southeast winds 5 to 15 mph. .WEDNESDAY...Partly cloudy. Lows 55 to 60. Highs 79 to 84. .THURSDAY...Mostly sunny. Highs 79 to 84. $$ MTZ133-221015- Sioux Ranger District Custer National Forest- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Mostly cloudy with scattered showers and thunderstorms. * Min temperature.......60-65. * 24 hr trend.........12 degrees cooler. * Max humidity..........82-87 percent. * 24 hr trend.........26 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...36 percent. * CWR...................30 percent. .FRIDAY... * Sky/weather...........Mostly sunny. Isolated rain showers in the morning. * Max temperature.......77-82. * 24 hr trend.........7 degrees cooler. * Min humidity..........29-34 percent. * 24 hr trend.........6 percent drier. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...12 percent. * CWR...................Less than 10 percent. .FRIDAY NIGHT... * Sky/weather...........Mostly clear. * Min temperature.......49-54. * 24 hr trend.........11 degrees cooler. * Max humidity..........70-75 percent. * 24 hr trend.........12 percent drier. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...4 percent. * CWR...................Zero. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......75-80. * 24 hr trend.........2 degrees cooler. * Min humidity..........30-35 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 10 mph. * Chance of lightning...1 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Mostly clear. Lows 47 to 52. Northeast winds 5 to 10 mph. .SUNDAY...Mostly clear. Lows 46 to 51. Highs 71 to 76. East winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 49 to 54. Highs 72 to 77. Southeast winds 5 to 15 mph. .TUESDAY...Mostly clear. Lows 52 to 57. Highs 77 to 82. Southeast winds 5 to 15 mph. .WEDNESDAY...Partly cloudy. Lows 54 to 59. Highs 80 to 85. .THURSDAY...Mostly sunny. Highs 80 to 85. $$ WYZ274-221015- Sheridan County- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Mostly cloudy. Scattered showers and thunderstorms in the evening, then isolated showers and thunderstorms overnight. * Min temperature.......54-59. * 24 hr trend.........12 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........51 percent wetter. * Wind (20 ft) * Slope/valley.........Northeast winds 5 to 10 mph. * Ridgetop.............South 5 to 10 mph. * Chance of lightning...38 percent. * CWR...................30 percent. .FRIDAY... * Sky/weather...........Mostly cloudy. Scattered showers and isolated thunderstorms in the morning, then isolated showers and thunderstorms in the afternoon. * Max temperature.......74-79. * 24 hr trend.........8 degrees cooler. * Min humidity..........44-49 percent. * 24 hr trend.........6 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 10 mph. * Ridgetop.............Light winds. * Chance of lightning...23 percent. * CWR...................10 percent. .FRIDAY NIGHT... * Sky/weather...........Mostly cloudy. Isolated showers and thunderstorms in the evening. * Min temperature.......49-54. * 24 hr trend.........5 degrees cooler. * Max humidity..........90-95 percent. * 24 hr trend.........8 percent drier. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph in the evening becoming light overnight. * Ridgetop.............South 5 to 10 mph. * Chance of lightning...21 percent. * CWR...................Less than 10 percent. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......78-83. * 24 hr trend.........4 degrees warmer. * Min humidity..........37-42 percent. * 24 hr trend.........7 percent drier. * Wind (20 ft) * Slope/valley.........Light winds in the morning becoming east 5 to 15 mph in the afternoon. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...3 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Partly cloudy. Lows 46 to 51. East winds 5 to 10 mph. .SUNDAY...Partly cloudy. Lows 46 to 51. Highs 76 to 81. Southeast winds 5 to 10 mph. .MONDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 47 to 52. Highs 77 to 82. Southeast winds 5 to 10 mph. .TUESDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 50 to 55. Highs 79 to 84. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly cloudy. Lows 52 to 57. Highs 80 to 85. .THURSDAY...Partly sunny. Isolated showers and thunderstorms. Highs 79 to 84. $$ WYZ284-221015- Bighorn National Forest- 213 PM MDT Thu Aug 21 2025 .Tonight... * Sky/weather...........Partly cloudy. Scattered showers and thunderstorms in the evening, then isolated showers and thunderstorms overnight. Haze overnight. * Min temperature.......45-50. * 24 hr trend.........2 degrees cooler. * Max humidity..........93-98 percent. * 24 hr trend.........29 percent wetter. * Wind (20 ft) * At Burgess Jct.......East winds 5 to 15 mph in the evening shifting to the south 5 to 10 mph overnight. * Chance of lightning...33 percent. * CWR...................10 percent. .FRIDAY... * Sky/weather...........Partly sunny. Scattered showers and isolated thunderstorms in the morning, then scattered showers and thunderstorms in the afternoon. * Max temperature.......58-63. * 24 hr trend.........8 degrees cooler. * Min humidity..........62-67 percent. * 24 hr trend.........20 percent wetter. * Wind (20 ft) * At Burgess Jct.......Northeast winds 5 to 15 mph. * Chance of lightning...34 percent. * CWR...................20 percent. .FRIDAY NIGHT... * Sky/weather...........Mostly cloudy. Scattered showers and thunderstorms in the evening. * Min temperature.......40-45. * 24 hr trend.........5 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........4 percent wetter. * Wind (20 ft) * At Burgess Jct.......East winds 5 to 15 mph in the evening shifting to the south 5 to 10 mph overnight. * Chance of lightning...27 percent. * CWR...................10 percent. .SATURDAY... * Sky/weather...........Sunny. * Max temperature.......63-68. * 24 hr trend.........5 degrees warmer. * Min humidity..........44-49 percent. * 24 hr trend.........18 percent drier. * Wind (20 ft) * At Burgess Jct.......South winds 5 to 10 mph in the morning shifting to the northeast 5 to 15 mph in the afternoon. * Chance of lightning...5 percent. * CWR...................Zero. .Forecast days 3 through 7...... .SATURDAY NIGHT...Partly cloudy. Lows 39 to 44. East winds 5 to 15 mph. .SUNDAY...Partly cloudy. Lows 40 to 45. Highs 62 to 67. Southeast winds 5 to 15 mph. .MONDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 40 to 45. Highs 61 to 66. West winds 5 to 15 mph. .TUESDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows 42 to 47. Highs 63 to 68. South winds 5 to 15 mph. .WEDNESDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows 43 to 48. Highs 63 to 68. .THURSDAY...Partly sunny. Scattered showers and isolated thunderstorms. Highs 62 to 67. $$ weather.gov/billings