Avalanche Weather Guidance
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
518
FWUS45 KTFX 201001
AVGTFX
Avalanche Weather Guidance
National Weather Service Great Falls MT
400 AM MDT Sun Sep 20 2026
...Glacier National Park/Marias Pass...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover FW CL CL CL CL FW FW FW FW FW FW FW FW FW FW FW FW
Cloud Cover (%) 10 0 0 5 5 10 10 10 20 5 5 5 10 10 10 15 20
Temperature 44 47 58 62 60 50 47 46 45 48 60 64 61 50 48 47 46
Max/Min Temp 62 44 64 46
Wind Dir SW SW SW W SW SW SW SW SW SW SW SW SW SW SW SW SW
Wind (mph) 9 9 6 6 5 8 8 9 10 10 10 10 8 10 11 11 10
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.7 9.5 9.6 10.2 10.3 9.9 9.6 9.3 9.3 9.3 9.4 9.6 9.5 9.6 9.4 9.3 9.2
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Bob Marshall/Scapegoat Wilderness...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover FW FW CL FW FW FW FW FW FW CL CL FW FW FW FW FW FW
Cloud Cover (%) 25 10 0 10 15 10 5 5 15 5 5 10 10 10 5 5 10
Temperature 41 45 58 62 60 50 46 44 43 47 61 66 63 51 48 46 44
Max/Min Temp 62 42 66 44
Wind Dir W W NW W SW S SW SW SW SW SW SW W W SW SW SW
Wind (mph) 4 5 4 4 4 3 3 4 4 4 5 5 4 4 5 5 5
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.9 9.7 9.9 10.7 10.9 10.5 9.9 9.5 9.3 9.3 9.9 10.4 10.4 10.4 9.9 9.6 9.5
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Nevada Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover SC FW CL FW FW FW FW FW FW CL FW FW FW FW CL FW FW
Cloud Cover (%) 40 20 5 10 10 10 10 5 10 0 5 5 5 5 5 5 10
Temperature 42 44 56 62 60 51 49 46 44 47 60 66 64 53 50 47 45
Max/Min Temp 62 43 66 45
Wind Dir W W W SW SE S SW SW SW SW SW SW SW SW SW SW SW
Wind (mph) 4 4 4 4 4 3 4 4 4 4 5 5 4 3 4 4 4
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.6 9.6 9.7 10.6 10.8 10.6 10.3 9.9 9.5 9.3 9.8 10.2 10.3 10.3 10.3 10.0 9.9
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Elkhorn/Boulder Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover SC SC FW FW FW FW FW FW FW CL FW FW FW FW CL FW FW
Cloud Cover (%) 45 30 5 15 10 15 10 10 10 0 10 10 10 5 5 5 10
Temperature 40 43 53 58 56 47 45 43 42 46 58 63 61 50 47 44 43
Max/Min Temp 58 40 63 42
Wind Dir W W NW N NE SE S SW SW S S S SE W SW SW SW
Wind (mph) 4 4 4 5 4 3 4 4 4 4 5 5 4 4 4 4 4
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.5 9.4 9.7 10.4 10.5 10.4 10.2 10.0 9.8 9.7 10.4 11.0 11.0 10.6 10.6 10.2 10.0
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Big Belt Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover SC SC FW FW FW FW FW FW FW CL CL FW FW CL CL CL FW
Cloud Cover (%) 50 30 10 15 5 10 10 10 15 5 5 10 5 5 5 5 5
Temperature 43 45 54 60 59 51 48 46 45 47 59 65 64 54 50 47 46
Max/Min Temp 60 43 65 45
Wind Dir W SW W NW N SE S S S S S SW S SE SE SE S
Wind (mph) 3 4 4 4 3 3 4 5 5 6 6 4 3 4 6 6 5
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.6 9.4 9.6 10.2 10.4 10.3 10.1 9.8 9.6 9.5 9.7 10.0 10.1 10.0 10.2 10.0 10.0
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Little Belt Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV BK SC SC FW FW FW FW FW CL CL FW FW FW FW FW FW
Cloud Cover (%) 75 55 30 35 25 20 20 20 20 5 5 5 10 5 5 5 5
Temperature 42 45 55 59 58 48 45 44 43 49 62 66 64 52 49 47 46
Max/Min Temp 60 41 66 45
Wind Dir SW SW NE N NE S S SW SW S SW SW S S S SW SW
Wind (mph) 3 3 4 5 4 5 6 5 5 4 5 6 5 9 9 6 6
Wind Gust (mph) 24 24 28
Precip Prob (%) 5 5 5 5 5 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.8 9.8 10.0 10.4 10.5 10.0 9.7 9.6 9.6 9.8 10.4 10.8 10.8 10.4 9.9 9.9 9.8
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Highwood Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover BK SC FW FW FW FW FW FW FW CL CL FW FW CL FW FW FW
Cloud Cover (%) 70 35 10 10 10 15 10 15 20 0 5 5 10 5 5 5 5
Temperature 47 49 57 62 61 52 49 49 48 53 64 69 67 57 54 53 52
Max/Min Temp 63 46 69 51
Wind Dir SE SE E E E SE S SW SW SE SE SE SE S SW SW SW
Wind (mph) 5 3 3 4 5 9 5 4 3 3 3 4 5 9 6 6 5
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.3 9.3 9.7 10.1 10.0 9.6 9.3 9.2 9.5 9.6 10.2 10.5 10.4 9.9 9.6 9.6 9.5
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Snowy/Judith Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV OV BK BK BK BK SC SC SC SC FW FW FW FW FW FW FW
Cloud Cover (%) 95 90 70 65 55 55 45 45 45 30 15 10 15 10 10 10 10
Temperature 45 47 53 57 56 49 48 47 45 50 61 66 64 53 51 49 47
Max/Min Temp 58 43 66 46
Wind Dir N N N NE E SE S S S S S S SE S S S SW
Wind (mph) 3 2 3 4 4 6 6 5 4 4 5 6 8 11 10 8 5
Wind Gust (mph) 24 31
Precip Prob (%) 50 30 10 20 10 5 5 5 0 0 0 0 0 0 0 0 0
Precip Type R R R
6 Hour QPF 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.06 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 10.6 10.6 10.5 10.6 10.6 10.4 10.2 10.0 10.0 10.0 10.3 10.5 10.6 10.1 10.1 9.8 9.8
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Bears Paw Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV BK SC SC FW BK OV OV OV SC FW FW FW FW FW FW FW
Cloud Cover (%) 80 55 40 30 25 60 75 70 75 50 20 10 20 10 15 20 20
Temperature 46 50 58 61 59 50 49 48 47 50 60 66 64 53 51 48 46
Max/Min Temp 62 44 66 45
Wind Dir SE SE SE SE SE SE SE S SE SE SE SE SE SE SE S S
Wind (mph) 2 2 4 5 6 9 8 6 6 8 9 9 9 11 10 5 4
Wind Gust (mph)
Precip Prob (%) 5 5 5 5 5 5 5 0 5 5 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.1 9.3 9.6 10.0 9.9 9.6 9.5 9.3 9.5 9.5 9.6 9.7 10.0 9.5 9.8 9.6 9.4
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Castle/Crazy Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV BK SC SC SC FW SC SC SC FW CL FW FW FW FW FW FW
Cloud Cover (%) 85 60 30 40 25 25 40 35 35 15 5 10 15 5 5 10 10
Temperature 42 44 52 57 56 48 45 44 42 46 58 64 62 51 47 45 43
Max/Min Temp 58 41 64 43
Wind Dir W W W NW N E SE S S SW SW SW SE SE SE S S
Wind (mph) 4 5 5 5 4 4 4 3 4 4 5 5 4 4 4 4 4
Wind Gust (mph)
Precip Prob (%) 5 10 0 5 5 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.9 9.9 10.1 10.6 10.8 10.5 10.0 9.7 9.6 9.6 10.1 10.5 10.5 10.3 10.0 10.0 10.0
Snow Density (%) 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Bridger Range...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV BK SC SC FW FW FW FW SC FW CL FW FW CL FW FW FW
Cloud Cover (%) 80 50 35 35 20 15 20 20 30 15 5 10 15 5 5 5 10
Temperature 42 44 51 55 55 47 45 43 42 46 57 63 61 50 47 45 43
Max/Min Temp 56 40 63 43
Wind Dir W W W NW N SE SE S S S SW SW SE SE SE SE SE
Wind (mph) 2 3 4 4 3 3 3 3 2 3 3 3 2 5 4 3 3
Wind Gust (mph)
Precip Prob (%) 0 5 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.9 9.8 9.9 10.3 10.6 10.5 10.1 9.8 9.6 9.6 10.1 10.4 10.4 10.1 10.5 10.4 10.3
Snow Density (%) 100 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Madison Range/Spanish Peaks...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV BK BK SC SC FW FW FW FW CL FW FW FW FW FW FW FW
Cloud Cover (%) 75 60 55 40 35 20 20 15 15 5 10 15 20 10 5 10 15
Temperature 39 39 46 50 50 43 41 39 38 41 53 58 57 47 44 42 40
Max/Min Temp 52 36 59 39
Wind Dir NW NW NW NW NW N SW SW S S SW W W S S SE SE
Wind (mph) 2 3 3 5 5 3 3 3 3 3 4 5 4 4 5 6 5
Wind Gust (mph)
Precip Prob (%) 5 5 0 5 5 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.9 9.7 10.2 10.7 10.7 10.3 10.1 10.0 9.9 10.1 10.9 11.3 11.3 11.0 10.9 10.8 10.4
Snow Density (%) 50 50 50 100 100 100 100 100 100 0 0 0 0 0 0 0 0
...Gallatin Range/Hyalite Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV BK BK SC SC FW FW FW FW FW FW FW SC FW FW FW FW
Cloud Cover (%) 85 65 60 40 25 15 20 10 20 5 15 20 25 10 10 5 15
Temperature 40 40 48 52 51 44 42 40 39 42 56 60 59 48 45 42 41
Max/Min Temp 53 37 61 40
Wind Dir W W NW NW N E S S S S W NW N S S S S
Wind (mph) 2 3 4 6 5 4 5 5 4 3 3 5 4 4 8 6 6
Wind Gust (mph)
Precip Prob (%) 5 5 0 5 5 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.9 9.7 10.2 10.6 10.6 10.3 10.2 10.1 9.8 9.9 10.8 11.3 11.4 11.1 11.1 10.8 10.5
Snow Density (%) 50 50 50 100 100 0 0 0 0 0 0 0 0 0 0 0 0
...Lionhead Range...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV SC SC SC SC SC FW FW FW FW FW FW FW FW FW FW FW
Cloud Cover (%) 80 50 40 45 35 35 15 15 20 10 10 10 20 15 10 15 25
Temperature 38 40 50 55 55 45 40 37 33 38 55 61 61 47 42 37 34
Max/Min Temp 57 31 63 33
Wind Dir NE N NW W W SW SE E E SE SW SW SW S E E E
Wind (mph) 0 1 1 2 1 1 0 0 1 1 2 3 2 2 1 2 2
Wind Gust (mph)
Precip Prob (%) 0 5 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 10.1 10.0 10.2 10.8 11.1 10.9 10.5 10.2 10.1 10.2 10.7 11.1 11.1 10.8 10.9 10.8 10.5
Snow Density (%) 100 100 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Tobacco Root Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover BK SC FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW
Cloud Cover (%) 55 45 25 25 10 15 15 15 15 5 10 15 10 10 5 10 15
Temperature 40 41 48 52 52 44 43 42 40 44 54 58 58 48 46 44 42
Max/Min Temp 53 38 59 41
Wind Dir NW NW NW N N N NW W SW SW SW W N S S SW SW
Wind (mph) 3 4 5 5 4 4 4 4 4 4 5 4 3 4 5 5 5
Wind Gust (mph)
Precip Prob (%) 5 5 0 5 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.6 9.6 9.9 10.6 10.8 10.5 10.3 10.1 10.0 10.1 10.8 11.1 11.1 10.5 10.7 10.6 10.5
Snow Density (%) 50 100 100 100 0 0 0 0 0 0 0 0 0 0 0 0 0
...Snowcrest/Gravelly/Ruby/Blacktail Ranges...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover BK BK SC FW FW FW FW FW FW CL FW FW FW FW FW FW SC
Cloud Cover (%) 65 55 25 20 20 10 15 10 15 5 10 15 25 10 15 15 25
Temperature 40 41 49 54 54 45 43 41 39 43 55 61 60 49 46 43 41
Max/Min Temp 55 37 62 40
Wind Dir NW NW NW N N NE E S S S SW SW SW S S SE SE
Wind (mph) 3 3 5 6 5 4 4 4 4 4 5 5 4 6 6 6 5
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.8 9.6 10.0 10.6 10.8 10.6 10.5 10.3 10.1 10.1 10.9 11.3 11.3 10.9 10.9 10.5 10.1
Snow Density (%) 50 100 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Centennial Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV BK FW SC SC FW FW FW FW CL FW FW FW FW FW FW SC
Cloud Cover (%) 70 55 25 40 35 15 15 15 15 5 5 15 20 10 10 20 30
Temperature 40 40 48 53 54 46 43 40 38 40 54 59 59 49 46 42 40
Max/Min Temp 54 36 60 39
Wind Dir N N NW NW NW NE E E E SE S S S SW NE NE NE
Wind (mph) 4 4 4 5 4 4 2 3 3 3 4 5 5 3 3 4 5
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 10.0 9.8 10.0 10.8 11.0 10.7 10.3 10.2 10.0 10.1 10.9 11.2 11.2 11.0 10.5 10.3 10.0
Snow Density (%) 50 50 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Anaconda/Highland Ranges...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover SC SC FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW
Cloud Cover (%) 45 35 10 10 10 15 10 5 10 5 5 10 10 10 10 15 20
Temperature 38 40 51 57 56 47 44 42 40 43 55 62 61 50 47 43 41
Max/Min Temp 58 39 63 41
Wind Dir N NE SW NW NW NE NE E SE S SW SW W N E S S
Wind (mph) 2 3 3 4 4 3 3 3 3 3 4 4 3 3 2 2 3
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 9.9 9.8 10.0 10.8 11.0 10.8 10.5 10.2 10.0 9.9 10.5 11.0 11.1 10.7 10.9 10.5 10.4
Snow Density (%) 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Pioneer Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover SC SC FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW
Cloud Cover (%) 50 45 10 15 15 15 15 10 10 5 10 10 15 10 10 15 25
Temperature 38 40 51 56 56 46 43 41 39 43 56 61 60 50 46 43 41
Max/Min Temp 57 38 62 40
Wind Dir NW NW NW N N E S S SW SW SW SW W S S SW SW
Wind (mph) 3 3 4 5 4 3 3 3 2 3 4 5 3 3 3 3 3
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 10.0 9.9 10.2 10.9 11.2 11.1 10.8 10.4 10.1 10.0 10.8 11.3 11.3 10.9 11.0 10.7 10.4
Snow Density (%) 100 100 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Beaverhead/Tendoy Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover BK BK FW FW FW FW FW FW FW CL FW FW FW FW FW FW SC
Cloud Cover (%) 55 55 15 10 10 15 15 10 10 5 10 15 20 15 20 25 35
Temperature 38 41 49 55 55 45 42 40 39 43 55 60 60 49 45 42 40
Max/Min Temp 56 37 61 40
Wind Dir NW NW N N N NE S S S S S SW SW SE S S S
Wind (mph) 3 3 5 6 5 3 4 4 3 3 5 5 4 5 6 4 4
Wind Gust (mph)
Precip Prob (%) 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Precip Type
6 Hour QPF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.00 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 10.0 9.9 10.2 10.8 11.0 11.0 10.8 10.5 10.2 10.2 10.9 11.3 11.3 11.0 11.1 10.5 10.2
Snow Density (%) 100 100 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Absoraka-Beartooth/Cooke City Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV OV OV OV BK BK SC SC SC FW FW FW FW FW FW FW FW
Cloud Cover (%) 95 90 75 80 65 65 40 25 30 15 20 25 20 15 10 10 15
Temperature 35 36 43 46 46 39 36 34 33 37 50 55 54 42 39 36 35
Max/Min Temp 48 31 56 34
Wind Dir NW N NW NW N N N SW S SW SW SW SW S S S S
Wind (mph) 2 3 4 6 5 3 3 3 3 3 4 5 4 5 5 4 4
Wind Gust (mph)
Precip Prob (%) 5 20 5 20 5 0 0 0 0 0 0 5 0 0 0 0 0
Precip Type
6 Hour QPF 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.02 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 10.1 10.0 10.6 11.0 11.1 10.8 10.6 10.5 10.3 10.5 11.2 11.5 11.5 11.2 11.0 10.9 10.7
Snow Density (%) 33 33 50 50 50 50 50 50 100 100 100 0 0 0 0 0 0
...Absoraka Mountains Above 6000ft Northeast Facing...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV OV BK OV BK BK SC FW SC FW FW SC SC FW FW FW FW
Cloud Cover (%) 95 90 65 70 65 50 25 20 30 10 20 30 25 15 10 10 15
Temperature 38 40 46 48 47 42 40 39 38 43 53 56 54 45 44 42 41
Max/Min Temp 49 36 57 40
Wind Dir NW NW NW NW N W SW SW SW S NE NE E S SW SW SW
Wind (mph) 4 5 5 6 5 4 5 5 5 4 5 8 5 6 9 10 10
Wind Gust (mph) 23 25
Precip Prob (%) 5 40 10 30 10 5 0 0 0 0 0 10 0 0 0 0 0
Precip Type
6 Hour QPF 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.06 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 10.2 10.1 10.5 10.9 11.0 10.8 10.6 10.4 10.3 10.5 11.3 11.6 11.6 11.1 11.0 10.7 10.5
Snow Density (%) 33 33 50 50 50 50 100 100 100 100 100 0 0 0 0 0 0
...Absoraka Mountains Above 6000ft West Facing...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV OV BK BK SC SC SC FW FW FW FW FW FW FW FW FW FW
Cloud Cover (%) 90 70 60 60 45 35 30 20 25 10 15 20 20 15 10 10 15
Temperature 38 39 47 51 51 44 40 38 36 40 54 59 58 47 43 40 38
Max/Min Temp 53 34 60 37
Wind Dir NW NW NW NW NW N S SW S S SW SW SW S S S S
Wind (mph) 2 3 3 5 5 3 3 3 3 3 4 5 4 4 5 5 4
Wind Gust (mph) 24 27 24 24
Precip Prob (%) 5 10 0 5 5 0 0 0 0 0 0 5 0 0 0 0 0
Precip Type
6 Hour QPF 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.01 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 10.0 9.9 10.4 10.9 10.9 10.6 10.4 10.3 10.1 10.3 11.0 11.4 11.4 11.1 10.9 10.9 10.6
Snow Density (%) 50 50 50 100 100 100 100 100 100 0 0 0 0 0 0 0 0
...Crazy Mountains...
Date Sunday 09/20/26 Monday 09/21/26
Time (LT) 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
6a 9a 12 3p 6p 9p 12 3a 6a 9a 12 3p 6p 9p 12 3a 6a
Cloud Cover OV OV BK BK SC SC SC FW SC FW CL FW FW FW FW FW FW
Cloud Cover (%) 95 80 50 60 45 40 30 25 35 15 5 10 15 10 5 10 10
Temperature 41 43 49 53 52 46 44 42 41 46 55 60 59 49 46 44 43
Max/Min Temp 54 39 61 42
Wind Dir NW W NW NW N SE SW W SW SW S S SE SE SW W W
Wind (mph) 5 5 6 5 4 4 4 3 3 3 5 6 5 6 4 4 5
Wind Gust (mph)
Precip Prob (%) 5 20 5 10 5 5 0 0 0 0 0 0 0 0 0 0 0
Precip Type R
6 Hour QPF 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00
12 Hour QPF 0.02 0.00 0.00 0.00
Low End QPF MM MM MM MM
High End QPF MM MM MM MM
6 Hour Snow 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 Hour Snow 0.0 0.0 0.0 0.0
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 10.1 10.0 10.3 10.8 10.9 10.7 10.3 9.9 9.7 9.8 10.6 10.8 10.7 10.3 10.2 10.1 10.0
Snow Density (%) 100 100 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0
$$
--- Precip Type Codes ---
CODE TYPE
T Thunderstorms
R Rain
S Snow
I Sleet
Z Freezing Rain