Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Billings, MT

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000
FNUS55 KBYZ 210840
FWFBYZ

Fire Weather Planning Forecast for SCen and SErn Montana
National Weather Service Billings MT
240 AM MDT Sun May 21 2017

.DISCUSSION...

Showers and isolated thunderstorms possible this afternoon for
areas east of a line from Sheridan to Billings. Showers should be
brief in duration and possibly producing gusty and erratic winds.
Northwest winds will increase in the afternoon with gusts 30 to 40
mph possible especially over the eastern Plains. Humidity will
generally be in the 30 to 40 percent range this afternoon with
temps in the upper 60s to low 70s. A front approaches from the
northeast this evening bringing a chance of wetting rain to most
of the forecast area. Gusty winds return Monday afternoon as the
front moves through the area. Walsh

MTZ123-212215-
Gallatin National Forest-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Mostly sunny. Isolated rain showers and
  thunderstorms in the afternoon.
* Max temperature.......55-65 at 5000 feet...48-58 at 7000 feet.
*   24 hr trend.........4 degrees warmer.
* Min humidity..........35-45 percent at 5000 feet...38-48 percent
  at 7000 feet.
*   24 hr trend.........5 percent drier.
* Wind (20 ft)
*  Slope/valley.........West winds 5 to 15 mph.
*  Ridgetop.............Northwest 5 to 10 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................Less than 10 percent.
* Haines index..........2.

.TONIGHT...
* Sky/weather...........Partly cloudy with isolated rain showers.
* Min temperature.......35-45 at 5000 feet...32-42 at 7000 feet.
*   24 hr trend.........3 degrees warmer.
* Max humidity..........77-87 percent at 5000 feet...80-90 percent
  at 7000 feet.
*   24 hr trend.........10 percent drier.
* Wind (20 ft)
*  Slope/valley.........West winds 5 to 15 mph.
*  Ridgetop.............Northwest 10 to 20 mph.
* LAL...................1...no thunderstorms.
* CWR...................Zero.

.MONDAY...
* Sky/weather...........Partly sunny with scattered rain showers.
  Isolated thunderstorms in the afternoon.
* Max temperature.......56-66 at 5000 feet...50-60 at 7000 feet.
*   24 hr trend.........1 degree warmer.
* Min humidity..........38-48 percent at 5000 feet...44-54 percent
  at 7000 feet.
*   24 hr trend.........3 percent wetter.
* Wind (20 ft)
*  Slope/valley.........West winds 5 to 15 mph.
*  Ridgetop.............Northwest 10 to 20 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................20 percent.
* Haines index..........2.


.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows 35 to 40. West winds 5 to
10 mph.
.TUESDAY...Partly cloudy. Lows 37 to 47. Highs 67 to 75. West
winds 5 to 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers with isolated
thunderstorms. Lows 38 to 48. Highs 68 to 77. West winds 5 to
15 mph with gusts to around 30 mph.
.THURSDAY...Cooler. Mostly cloudy. Scattered showers with
isolated thunderstorms. Lows 35 to 43. Highs 54 to 64. West winds
5 to 10 mph.
.FRIDAY...Mostly cloudy. Scattered showers, snow showers with
isolated thunderstorms. Lows 34 to 41. Highs 53 to 61.
.SATURDAY...Mostly cloudy. Scattered showers, snow showers with
isolated thunderstorms. Highs 55 to 63.

$$

MTZ124-212215-
Wheatland County/Sweet Grass County-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Mostly sunny. Isolated rain showers and
  thunderstorms in the afternoon.
* Max temperature.......63-68.
*   24 hr trend.........9 degrees warmer.
* Min humidity..........31-36 percent.
*   24 hr trend.........18 percent drier.
* Wind (20 ft)
*  Plains...............Northwest winds 5 to 15 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................10 percent.
* Haines index..........3.

.TONIGHT...
* Sky/weather...........Mostly cloudy with isolated rain showers.
* Min temperature.......42-47.
*   24 hr trend.........6 degrees warmer.
* Max humidity..........81-86 percent.
*   24 hr trend.........4 percent drier.
* Wind (20 ft)
*  Plains...............West winds 5 to 15 mph.
* LAL...................1...no thunderstorms.
* CWR...................Zero.

.MONDAY...
* Sky/weather...........Partly sunny with isolated rain showers.
  Isolated thunderstorms in the afternoon.
* Max temperature.......63-68.
*   24 hr trend.........Unchanged.
* Min humidity..........33-38 percent.
*   24 hr trend.........2 percent wetter.
* Wind (20 ft)
*  Plains...............Northwest winds 10 to 20 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................Zero.
* Haines index..........2.


.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows 37 to 42. Northwest winds
5 to 10 mph.
.TUESDAY...Partly cloudy. Lows 39 to 45. Highs 71 to 76.
Southwest winds 5 to 10 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 41 to 46. Highs 73 to 78. West winds 5 to 15 mph.
.THURSDAY...Cooler. Mostly cloudy. Scattered showers with
isolated thunderstorms. Lows 37 to 42. Highs 59 to 64. Northwest
winds 5 to 15 mph.
.FRIDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Lows 36 to 41. Highs 56 to 61.
.SATURDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Highs 60 to 65.

$$

MTZ125-212215-
Stillwater County-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Mostly sunny. Scattered rain showers with
  isolated thunderstorms in the afternoon.
* Max temperature.......61-66.
*   24 hr trend.........3 degrees warmer.
* Min humidity..........39-44 percent.
*   24 hr trend.........1 percent drier.
* Wind (20 ft)
*  Plains...............West winds 5 to 15 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................Zero.
* Haines index..........2.

.TONIGHT...
* Sky/weather...........Mostly cloudy. Isolated rain showers in the
  evening...then scattered rain showers overnight.
* Min temperature.......46-51.
*   24 hr trend.........6 degrees warmer.
* Max humidity..........77-82 percent.
*   24 hr trend.........4 percent drier.
* Wind (20 ft)
*  Plains...............West winds 5 to 15 mph.
* LAL...................1...no thunderstorms.
* CWR...................10 percent.

.MONDAY...
* Sky/weather...........Mostly cloudy. Numerous rain showers in the
  morning...then scattered rain showers with isolated thunderstorms
  in the afternoon.
* Max temperature.......61-66.
*   24 hr trend.........Unchanged.
* Min humidity..........39-44 percent.
*   24 hr trend.........Unchanged.
* Wind (20 ft)
*  Plains...............Northwest winds 10 to 20 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................30 percent.
* Haines index..........2.


.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Isolated showers and
thunderstorms. Lows 39 to 44. West winds 5 to 15 mph.
.TUESDAY...Partly cloudy. Lows 41 to 49. Highs 69 to 74.
Southwest winds 5 to 10 mph.
.WEDNESDAY...Partly cloudy. Scattered showers with isolated
thunderstorms. Lows 43 to 49. Highs 74 to 79. West winds 10 to
20 mph.
.THURSDAY...Cooler. Mostly cloudy. Scattered showers with
isolated thunderstorms. Lows 40 to 45. Highs 60 to 65. Northwest
winds 5 to 15 mph.
.FRIDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Lows 39 to 44. Highs 58 to 63.
.SATURDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Highs 60 to 65.

$$

MTZ126-212215-
Beartooth Ranger District Custer National Forest-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Mostly sunny. Isolated rain and snow
  showers in the morning...then scattered rain showers with
  isolated thunderstorms in the afternoon.
* Max temperature.......55-64 at 5000 feet...46-56 at 7000 feet.
*   24 hr trend.........2 degrees cooler.
* Min humidity..........36-46 percent at 5000 feet...45-55 percent
  at 7000 feet.
*   24 hr trend.........4 percent drier.
* Wind (20 ft)
*  Slope/valley.........Northwest winds 5 to 15 mph.
*  Ridgetop.............Northwest 10 to 20 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................Zero.
* Haines index..........3.

.TONIGHT...
* Sky/weather...........Partly cloudy. Isolated rain showers in the
  evening...then scattered rain and snow showers overnight.
* Min temperature.......43-50 at 5000 feet...34-44 at 7000 feet.
*   24 hr trend.........5 degrees warmer.
* Max humidity..........82-89 percent.
*   24 hr trend.........4 percent wetter.
* Wind (20 ft)
*  Slope/valley.........Northwest winds 5 to 15 mph.
*  Ridgetop.............Northwest 15 to 30 mph.
* LAL...................1...no thunderstorms.
* CWR...................10 percent.

.MONDAY...
* Sky/weather...........Mostly cloudy. Numerous rain showers in the
  morning...then scattered rain showers with isolated thunderstorms
  in the afternoon.
* Max temperature.......54-63 at 5000 feet...46-56 at 7000 feet.
*   24 hr trend.........2 degrees warmer.
* Min humidity..........40-50 percent at 5000 feet...48-58 percent
  at 7000 feet.
*   24 hr trend.........6 percent wetter.
* Wind (20 ft)
*  Slope/valley.........Northwest winds 10 to 20 mph.
*  Ridgetop.............Northwest 25 to 40 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................50 percent.
* Haines index..........2.


.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Isolated showers, thunderstorms
and snow showers. Lows 39 to 44. Northwest winds 5 to 10 mph.
.TUESDAY...Partly cloudy. Lows 40 to 50. Highs 63 to 72. West
winds 5 to 10 mph.
.WEDNESDAY...Partly cloudy. Scattered showers with isolated
thunderstorms. Lows 42 to 51. Highs 72 to 82. West winds 5 to
15 mph.
.THURSDAY...Cooler. Mostly cloudy. Scattered showers, snow
showers with isolated thunderstorms. Lows 40 to 48. Highs 58 to
68. Northwest winds 5 to 10 mph.
.FRIDAY...Mostly cloudy. Scattered showers, snow showers with
isolated thunderstorms. Lows 39 to 44. Highs 55 to 63.
.SATURDAY...Mostly cloudy. Scattered showers, snow showers with
isolated thunderstorms. Highs 55 to 64.

$$

MTZ127-212215-
Golden Valley County/Musselshell county-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Mostly sunny. Isolated rain showers and
  thunderstorms in the afternoon.
* Max temperature.......62-67.
*   24 hr trend.........2 degrees warmer.
* Min humidity..........29-34 percent.
*   24 hr trend.........1 percent drier.
* Wind (20 ft)
*  Plains...............Northwest winds 10 to 20 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................Zero.
* Haines index..........3.

.TONIGHT...
* Sky/weather...........Mostly cloudy. Isolated rain showers in the
  evening...then scattered rain showers overnight.
* Min temperature.......47-52.
*   24 hr trend.........3 degrees warmer.
* Max humidity..........77-82 percent.
*   24 hr trend.........7 percent wetter.
* Wind (20 ft)
*  Plains...............Northwest winds 5 to 15 mph.
* LAL...................1...no thunderstorms.
* CWR...................10 percent.

.MONDAY...
* Sky/weather...........Mostly sunny. Scattered rain showers in the
  morning...then isolated rain showers and thunderstorms in the
  afternoon.
* Max temperature.......60-65.
*   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 with gusts to
   around 30 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................10 percent.
* Haines index..........2.


.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly clear. Lows 42 to 47. Northeast winds 5 to
10 mph.
.TUESDAY...Partly cloudy. Lows 44 to 53. Highs 67 to 72. South
winds 5 to 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers with isolated
thunderstorms. Lows 48 to 53. Highs 74 to 79. West winds 10 to
20 mph.
.THURSDAY...Cooler. Mostly cloudy. Scattered showers with
isolated thunderstorms. Lows 44 to 49. Highs 59 to 64. Northwest
winds 5 to 15 mph.
.FRIDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows
42 to 47. Highs 57 to 62.
.SATURDAY...Partly sunny. Scattered showers with isolated
thunderstorms. Highs 59 to 64.

$$

MTZ128-212215-
Yellowstone County-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Partly sunny. Isolated rain showers and
  thunderstorms in the afternoon.
* Max temperature.......67-72.
*   24 hr trend.........3 degrees warmer.
* Min humidity..........27-32 percent.
*   24 hr trend.........4 percent drier.
* Wind (20 ft)
*  Plains...............Northwest winds 5 to 15 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................Zero.
* Haines index..........2.

.TONIGHT...
* Sky/weather...........Mostly cloudy. Isolated rain showers in the
  evening...then scattered rain showers overnight.
* Min temperature.......47-52.
*   24 hr trend.........4 degrees warmer.
* Max humidity..........76-81 percent.
*   24 hr trend.........1 percent wetter.
* Wind (20 ft)
*  Plains...............West winds 5 to 15 mph.
* LAL...................1...no thunderstorms.
* CWR...................20 percent.

.MONDAY...
* Sky/weather...........Mostly cloudy with numerous rain showers in
  the morning...then mostly sunny with isolated rain showers and
  thunderstorms in the afternoon.
* Max temperature.......65-70.
*   24 hr trend.........2 degrees cooler.
* Min humidity..........30-35 percent.
*   24 hr trend.........3 percent wetter.
* Wind (20 ft)
*  Plains...............Northwest winds 10 to 20 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................40 percent.
* Haines index..........2.


.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows 43 to 48. Northwest winds
5 to 10 mph.
.TUESDAY...Partly cloudy. Lows 45 to 51. Highs 71 to 76. South
winds 5 to 10 mph.
.WEDNESDAY...Partly cloudy. Scattered showers with isolated
thunderstorms. Lows 47 to 52. Highs 80 to 85. West winds 5 to
15 mph.
.THURSDAY...Cooler. Mostly cloudy. Scattered showers with
isolated thunderstorms. Lows 44 to 49. Highs 64 to 69. Northwest
winds 5 to 15 mph.
.FRIDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows
42 to 47. Highs 62 to 67.
.SATURDAY...Partly sunny. Scattered showers with isolated
thunderstorms. Highs 64 to 69.

$$

MTZ129-212215-
Crow Indian Reservation/Bighorn Canyon Rec Area-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Partly sunny with isolated rain showers.
  Isolated thunderstorms in the afternoon.
* Max temperature.......54-64 at 5000 feet...48-55 at 7000 feet.
*   24 hr trend.........3 degrees warmer.
* Min humidity..........40-50 percent at 5000 feet...49-59 percent
  at 7000 feet.
*   24 hr trend.........2 percent wetter.
* Wind (20 ft)
*  Slope/valley.........Northwest winds 10 to 20 mph. Gusts up to 30
   mph in the afternoon.
*  Ridgetop.............Northwest 15 to 30 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................20 percent.
* Haines index..........3.

.TONIGHT...
* Sky/weather...........Mostly cloudy. Isolated rain showers in the
  evening...then scattered rain showers overnight.
* Min temperature.......41-49 at 5000 feet...39-44 at 7000 feet.
*   24 hr trend.........3 degrees warmer.
* Max humidity..........80-90 percent at 5000 feet...85-94 percent
  at 7000 feet.
*   24 hr trend.........1 percent wetter.
* Wind (20 ft)
*  Slope/valley.........West winds 10 to 20 mph.
*  Ridgetop.............Northwest 20 to 35 mph.
* LAL...................1...no thunderstorms.
* CWR...................30 percent.

.MONDAY...
* Sky/weather...........Partly sunny. Numerous rain showers in the
  morning...then scattered rain showers with isolated thunderstorms
  in the afternoon.
* Max temperature.......53-63 at 5000 feet...45-54 at 7000 feet.
*   24 hr trend.........3 degrees cooler.
* Min humidity..........41-51 percent at 5000 feet...50-60 percent
  at 7000 feet.
*   24 hr trend.........5 percent wetter.
* Wind (20 ft)
*  Slope/valley.........Northwest winds 15 to 25 mph with gusts to
   around 30 mph.
*  Ridgetop.............Northwest 20 to 35 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................40 percent.
* Haines index..........3.


.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows 36 to 43. Northwest winds
5 to 15 mph.
.TUESDAY...Partly cloudy. Lows 39 to 49. Highs 62 to 72. North
winds 5 to 15 mph.
.WEDNESDAY...Warmer. Partly cloudy. Isolated showers and
thunderstorms. Lows 43 to 51. Highs 70 to 80. West winds 5 to
15 mph.
.THURSDAY...Cooler. Mostly cloudy. Scattered showers with
isolated thunderstorms. Lows 39 to 48. Highs 56 to 66. West winds
5 to 15 mph.
.FRIDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Lows 37 to 44. Highs 53 to 63.
.SATURDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Highs 54 to 64.

$$

MTZ130-212215-
Northern Rosebud/Northern Treasure Counties-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Partly sunny with isolated rain showers.
  Isolated thunderstorms in the afternoon.
* Max temperature.......67-72.
*   24 hr trend.........3 degrees warmer.
* Min humidity..........28-33 percent.
*   24 hr trend.........7 percent wetter.
* Wind (20 ft)
*  Plains...............Northwest winds 10 to 20 mph. Gusts up to 30
   mph in the afternoon.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................Zero.
* Haines index..........3.

.TONIGHT...
* Sky/weather...........Mostly cloudy. Isolated rain showers in the
  evening...then scattered rain showers overnight.
* Min temperature.......45-50.
*   24 hr trend.........3 degrees warmer.
* Max humidity..........89-94 percent.
*   24 hr trend.........14 percent wetter.
* Wind (20 ft)
*  Plains...............Northwest winds 5 to 15 mph.
* LAL...................1...no thunderstorms.
* CWR...................30 percent.

.MONDAY...
* Sky/weather...........Mostly sunny. Scattered rain showers in the
  morning...then isolated rain showers and thunderstorms in the
  afternoon.
* Max temperature.......64-69.
*   24 hr trend.........3 degrees cooler.
* Min humidity..........36-41 percent.
*   24 hr trend.........8 percent wetter.
* Wind (20 ft)
*  Plains...............Northwest winds 10 to 20 mph with gusts to
   around 30 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................20 percent.
* Haines index..........3.


.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows 41 to 46. Northwest winds
5 to 10 mph.
.TUESDAY...Partly cloudy. Lows 43 to 49. Highs 70 to 75.
Southeast winds 5 to 10 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 46 to 51. Highs 79 to 84. West winds 5 to 15 mph.
.THURSDAY...Cooler. Mostly cloudy. Isolated showers and
thunderstorms. Lows 44 to 49. Highs 67 to 72. Northwest winds
5 to 15 mph.
.FRIDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows
43 to 48. Highs 65 to 70.
.SATURDAY...Partly sunny. Scattered showers with isolated
thunderstorms. Highs 66 to 71.

$$

MTZ131-212215-
Northern Cheyenne Indian Reservation/Ashland Ranger District
Custer Natl Forest-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Partly sunny. Isolated rain showers in the
  morning...then scattered rain showers with isolated thunderstorms
  in the afternoon.
* Max temperature.......64-69.
*   24 hr trend.........3 degrees warmer.
* Min humidity..........32-37 percent.
*   24 hr trend.........8 percent wetter.
* Wind (20 ft)
*  Slope/valley.........Northwest winds 10 to 20 mph. Gusts up to 30
   mph in the afternoon.
*  Ridgetop.............Northwest 15 to 25 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................10 percent.
* Haines index..........3.

.TONIGHT...
* Sky/weather...........Mostly cloudy. Isolated rain showers in the
  evening...then scattered rain showers overnight.
* Min temperature.......44-49.
*   24 hr trend.........7 degrees warmer.
* Max humidity..........89-94 percent.
*   24 hr trend.........1 percent wetter.
* Wind (20 ft)
*  Slope/valley.........West winds 5 to 15 mph.
*  Ridgetop.............Northwest 15 to 30 mph.
* LAL...................1...no thunderstorms.
* CWR...................40 percent.

.MONDAY...
* Sky/weather...........Partly sunny. Numerous rain showers in the
  morning...then scattered rain showers with isolated thunderstorms
  in the afternoon.
* Max temperature.......61-66.
*   24 hr trend.........3 degrees cooler.
* Min humidity..........42-47 percent.
*   24 hr trend.........10 percent wetter.
* Wind (20 ft)
*  Slope/valley.........Northwest winds 15 to 25 mph with gusts to
   around 30 mph.
*  Ridgetop.............Northwest 20 to 35 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................40 percent.
* Haines index..........3.


.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Isolated showers and
thunderstorms. Lows 38 to 43. Northwest winds 5 to 10 mph.
.TUESDAY...Partly cloudy. Lows 40 to 45. Highs 66 to 71. North
winds 5 to 10 mph.
.WEDNESDAY...Warmer. Partly cloudy. Isolated showers and
thunderstorms. Lows 43 to 48. Highs 77 to 82. West winds 5 to
10 mph.
.THURSDAY...Cooler. Mostly cloudy. Scattered showers with
isolated thunderstorms. Lows 42 to 47. Highs 65 to 70. Northwest
winds 5 to 10 mph.
.FRIDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Lows 41 to 46. Highs 62 to 67.
.SATURDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Highs 63 to 68.

$$

MTZ132-212215-
Custer County-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Partly sunny. Isolated rain showers in the
  morning...then scattered rain showers with isolated thunderstorms
  in the afternoon.
* Max temperature.......64-69.
*   24 hr trend.........4 degrees warmer.
* Min humidity..........31-36 percent.
*   24 hr trend.........5 percent wetter.
* Wind (20 ft)
*  Plains...............Northwest winds 10 to 20 mph. Gusts up to 30
   mph in the afternoon.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................Zero.
* Haines index..........3.

.TONIGHT...
* Sky/weather...........Mostly cloudy with scattered rain showers.
* Min temperature.......44-49.
*   24 hr trend.........4 degrees warmer.
* Max humidity..........89-94 percent.
*   24 hr trend.........22 percent wetter.
* Wind (20 ft)
*  Plains...............Northwest winds 5 to 15 mph.
* LAL...................1...no thunderstorms.
* CWR...................20 percent.

.MONDAY...
* Sky/weather...........Partly sunny with scattered rain showers.
  Isolated thunderstorms in the afternoon.
* Max temperature.......58-63.
*   24 hr trend.........6 degrees cooler.
* Min humidity..........41-46 percent.
*   24 hr trend.........10 percent wetter.
* Wind (20 ft)
*  Plains...............North winds 15 to 25 mph with gusts to
   around 30 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................30 percent.
* Haines index..........3.


.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Isolated showers and
thunderstorms. Lows 39 to 44. North winds 5 to 15 mph.
.TUESDAY...Partly cloudy. Lows 41 to 46. Highs 64 to 69.
Northeast winds 5 to 15 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 45 to 50. Highs 73 to 78. Southwest winds 5 to 15 mph.
.THURSDAY...Mostly cloudy. Isolated showers and thunderstorms.
Lows 45 to 50. Highs 66 to 71. West winds 5 to 15 mph.
.FRIDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows
43 to 48. Highs 63 to 68.
.SATURDAY...Partly sunny. Scattered showers with isolated
thunderstorms. Highs 63 to 68.

$$

MTZ133-212215-
Sioux Ranger District Custer National Forest-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Mostly sunny in the morning...then mostly
  cloudy with scattered rain showers with isolated thunderstorms in
  the afternoon.
* Max temperature.......63-68.
*   24 hr trend.........5 degrees warmer.
* Min humidity..........31-36 percent.
*   24 hr trend.........4 percent wetter.
* Wind (20 ft)
*  Plains...............Northwest winds 10 to 20 mph. Gusts up to 35
   mph in the afternoon.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................10 percent.
* Haines index..........3.

.TONIGHT...
* Sky/weather...........Mostly cloudy. Isolated rain showers in the
  evening...then scattered rain showers overnight.
* Min temperature.......42-47.
*   24 hr trend.........6 degrees warmer.
* Max humidity..........91-96 percent.
*   24 hr trend.........20 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...................10 percent.

.MONDAY...
* Sky/weather...........Mostly cloudy with scattered rain showers.
  Isolated thunderstorms in the afternoon.
* Max temperature.......57-62.
*   24 hr trend.........6 degrees cooler.
* Min humidity..........42-47 percent.
*   24 hr trend.........11 percent wetter.
* Wind (20 ft)
*  Plains...............Northwest winds 15 to 25 mph with gusts to
   around 30 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................40 percent.
* Haines index..........3.


.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Isolated showers and
thunderstorms. Lows 38 to 43. Northwest winds 5 to 15 mph.
.TUESDAY...Partly cloudy. Lows 39 to 44. Highs 62 to 67.
Northeast winds 5 to 15 mph.
.WEDNESDAY...Warmer. Mostly clear. Isolated showers and
thunderstorms. Lows 42 to 48. Highs 74 to 79. South winds 5 to
15 mph.
.THURSDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Lows 45 to 50. Highs 67 to 72. Northwest winds
5 to 15 mph.
.FRIDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Lows 43 to 48. Highs 64 to 69.
.SATURDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Highs 62 to 67.

$$

WYZ274-212215-
Sheridan County-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Partly sunny. Isolated rain showers in the
  morning...then scattered rain showers with isolated thunderstorms
  in the afternoon.
* Max temperature.......61-66.
*   24 hr trend.........Unchanged.
* Min humidity..........42-47 percent.
*   24 hr trend.........4 percent wetter.
* Wind (20 ft)
*  Slope/valley.........Northwest winds 10 to 20 mph. Gusts up to 30
   mph in the afternoon.
*  Ridgetop.............Northwest 15 to 25 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................10 percent.
* Haines index..........3.

.TONIGHT...
* Sky/weather...........Mostly cloudy. Isolated rain showers in the
  evening...then scattered rain showers overnight.
* Min temperature.......43-48.
*   24 hr trend.........6 degrees warmer.
* Max humidity..........82-87 percent.
*   24 hr trend.........Unchanged.
* Wind (20 ft)
*  Slope/valley.........West winds 5 to 15 mph.
*  Ridgetop.............Northwest 15 to 30 mph.
* LAL...................1...no thunderstorms.
* CWR...................10 percent.

.MONDAY...
* Sky/weather...........Partly sunny. Numerous rain showers in the
  morning...then scattered rain showers with isolated thunderstorms
  in the afternoon.
* Max temperature.......59-64.
*   24 hr trend.........2 degrees cooler.
* Min humidity..........46-51 percent.
*   24 hr trend.........4 percent wetter.
* Wind (20 ft)
*  Slope/valley.........Northwest winds 15 to 25 mph with gusts to
   around 30 mph.
*  Ridgetop.............Northwest 20 to 35 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................50 percent.
* Haines index..........3.


.Forecast days 3 through 7......
.MONDAY NIGHT...Colder. Partly cloudy. Isolated showers and
thunderstorms. Lows 35 to 40. West winds 5 to 15 mph.
.TUESDAY...Partly cloudy. Lows 37 to 43. Highs 65 to 70.
Northwest winds 5 to 10 mph.
.WEDNESDAY...Warmer. Partly cloudy. Isolated showers and
thunderstorms. Lows 41 to 46. Highs 78 to 83. West winds 5 to
15 mph.
.THURSDAY...Cooler. Mostly cloudy. Scattered showers with
isolated thunderstorms. Lows 40 to 45. Highs 64 to 69. Northwest
winds 5 to 10 mph.
.FRIDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Lows 38 to 43. Highs 61 to 66.
.SATURDAY...Mostly cloudy. Scattered showers with isolated
thunderstorms. Highs 61 to 66.

$$

WYZ284-212215-
Bighorn National Forest-
240 AM MDT Sun May 21 2017

.Today...
* Sky/weather...........Partly sunny with scattered rain showers.
  Scattered snow showers in the morning...then isolated
  thunderstorms in the afternoon.
* Max temperature.......44-49.
*   24 hr trend.........4 degrees warmer.
* Min humidity..........55-60 percent.
*   24 hr trend.........7 percent drier.
* Wind (20 ft)
*  At Burgess Jct.......Northwest winds 5 to 15 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................20 percent.
* Haines index..........3.

.TONIGHT...
* Sky/weather...........Partly cloudy with scattered rain and snow
  showers.
* Min temperature.......34-39.
*   24 hr trend.........7 degrees warmer.
* Max humidity..........89-94 percent.
*   24 hr trend.........Unchanged.
* Wind (20 ft)
*  At Burgess Jct.......West winds 5 to 15 mph.
* LAL...................1...no thunderstorms.
* CWR...................30 percent.

.MONDAY...
* Sky/weather...........Cloudy with numerous rain showers in the
  morning...then partly sunny with scattered rain showers with
  isolated thunderstorms in the afternoon.
* Max temperature.......42-47.
*   24 hr trend.........2 degrees cooler.
* Min humidity..........61-66 percent.
*   24 hr trend.........6 percent wetter.
* Wind (20 ft)
*  At Burgess Jct.......Northwest winds 10 to 20 mph.
* LAL...................2...1 to 8 strikes/15 min/cell.
* CWR...................60 percent.
* Haines index..........3.


.Forecast days 3 through 7......
.MONDAY NIGHT...Colder. Partly cloudy. Isolated showers,
thunderstorms and snow showers. Lows 24 to 29. Northwest winds
5 to 15 mph.
.TUESDAY...Partly cloudy. Lows 26 to 36. Highs 51 to 56.
Northwest winds 5 to 10 mph.
.WEDNESDAY...Partly cloudy. Isolated showers, thunderstorms and
snow showers. Lows 32 to 37. Highs 60 to 65. West winds 5 to
15 mph.
.THURSDAY...Cooler. Mostly cloudy. Scattered showers, snow
showers with isolated thunderstorms. Lows 30 to 35. Highs 49 to
54. West winds 5 to 15 mph.
.FRIDAY...Mostly cloudy. Scattered showers, snow showers with
isolated thunderstorms. Lows 28 to 33. Highs 46 to 51.
.SATURDAY...Mostly cloudy. Scattered showers, snow showers with
isolated thunderstorms. Highs 45 to 50.

$$

weather.gov/billings



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