Avalanche Weather Guidance
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
628
FWUS45 KTFX 181001
AVGTFX
Avalanche Weather Guidance
National Weather Service Great Falls MT
400 AM MDT Fri Sep 18 2026
...Glacier National Park/Marias Pass...
Date Friday 09/18/26 Saturday 09/19/26
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 SC SC BK BK BK SC BK SC FW FW SC FW FW FW FW
Cloud Cover (%) 30 25 30 40 65 65 65 50 60 40 25 25 30 25 15 10 10
Temperature 45 48 57 59 57 49 46 45 43 46 56 59 57 49 46 45 43
Max/Min Temp 60 43 59 43
Wind Dir W W NE NE E E SE SE E E E SE SE S SW SW SW
Wind (mph) 4 3 4 5 5 4 3 3 3 4 6 6 5 5 6 8 8
Wind Gust (mph) 23
Precip Prob (%) 5 5 10 20 10 10 5 5 5 5 5 0 0 0 0 0 0
Precip Type R R R
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) 10.6 10.3 10.5 10.9 11.0 10.8 10.6 10.3 10.1 9.8 9.9 10.4 10.4 10.6 10.3 9.9 9.6
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Bob Marshall/Scapegoat Wilderness...
Date Friday 09/18/26 Saturday 09/19/26
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 BK BK OV OV OV OV OV OV OV BK BK BK SC SC FW
Cloud Cover (%) 30 30 50 70 80 85 85 85 95 85 75 65 55 55 45 35 20
Temperature 46 48 59 60 55 50 48 46 45 46 53 55 54 47 44 42 41
Max/Min Temp 61 44 56 41
Wind Dir W W E NE NE NE NE NE NE NE NE NE E SW SW W W
Wind (mph) 4 3 3 5 5 4 4 3 3 4 5 5 4 3 3 3 4
Wind Gust (mph)
Precip Prob (%) 5 20 30 50 50 40 30 30 30 40 40 0 5 5 0 0 0
Precip Type R R R R R R R R R R
6 Hour QPF 0.00 0.06 0.04 0.08 0.05 0.03 0.00 0.00
12 Hour QPF 0.06 0.12 0.08 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) 11.1 11.0 11.1 11.3 11.2 11.0 10.8 10.7 10.5 10.2 10.0 10.2 10.4 10.5 10.2 10.1 9.9
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Nevada Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 SC BK OV OV OV OV OV OV OV OV OV OV BK SC SC
Cloud Cover (%) 45 45 45 65 80 95 90 90 95 90 95 90 70 70 60 45 30
Temperature 48 50 59 62 57 53 52 50 49 47 51 53 52 48 46 44 43
Max/Min Temp 62 47 54 43
Wind Dir W W NE NE N NE NE NE NE N NE NE N NW W W SW
Wind (mph) 4 3 3 5 6 6 6 5 6 6 6 5 4 3 3 3 4
Wind Gust (mph)
Precip Prob (%) 5 10 20 50 60 60 70 60 60 60 50 5 10 10 0 0 0
Precip Type R R T R R R R R R R
6 Hour QPF 0.00 0.09 0.34 0.25 0.21 0.09 0.00 0.00
12 Hour QPF 0.09 0.59 0.30 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) 11.1 11.1 11.2 11.4 11.3 11.3 11.2 11.2 11.0 10.5 10.4 10.4 10.5 10.2 10.0 9.9 9.6
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Elkhorn/Boulder Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 BK OV OV OV OV OV OV OV OV OV OV OV BK BK SC
Cloud Cover (%) 55 55 55 70 85 95 90 95 95 90 95 90 70 80 65 55 50
Temperature 47 49 58 59 54 49 48 47 46 45 47 48 47 45 44 42 40
Max/Min Temp 60 44 49 40
Wind Dir SW SW E NE N N N NE N N N N N NW W W W
Wind (mph) 4 4 3 5 6 6 5 6 8 6 6 5 4 3 3 3 4
Wind Gust (mph)
Precip Prob (%) 20 30 30 50 70 90 80 90 80 80 90 60 50 50 10 10 5
Precip Type R R R T R R R R R R R R R R R R
6 Hour QPF 0.00 0.14 0.29 0.34 0.37 0.30 0.03 0.00
12 Hour QPF 0.14 0.63 0.67 0.03
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) 11.5 11.5 11.6 12.0 12.0 11.8 11.6 11.4 11.2 11.0 10.9 10.9 10.9 10.6 10.5 10.4 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 Friday 09/18/26 Saturday 09/19/26
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 SC BK OV OV OV OV OV OV OV OV OV OV OV BK SC
Cloud Cover (%) 50 30 45 60 80 95 95 90 95 90 90 85 75 80 70 65 50
Temperature 50 52 60 63 59 53 52 51 50 48 51 52 50 48 47 46 44
Max/Min Temp 63 48 53 44
Wind Dir SW SW NW NE NE NE NE NE NE N N N N NW W SW SW
Wind (mph) 3 3 3 5 6 6 5 5 5 5 5 5 4 3 3 3 3
Wind Gust (mph)
Precip Prob (%) 5 10 30 40 60 70 70 70 70 80 60 50 40 40 20 20 5
Precip Type R R R R R R R R R R R R R R R
6 Hour QPF 0.00 0.05 0.35 0.26 0.32 0.25 0.05 0.02
12 Hour QPF 0.05 0.61 0.57 0.07
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) 11.4 11.4 11.4 11.7 11.8 11.9 11.6 11.4 11.2 10.8 10.7 10.8 10.8 10.6 10.5 10.4 10.3
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Little Belt Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 BK OV OV OV OV OV OV OV OV OV OV OV OV OV BK
Cloud Cover (%) 40 30 55 75 85 95 95 95 95 90 90 85 85 85 80 75 65
Temperature 50 54 62 63 57 52 50 49 48 48 50 51 50 47 45 44 43
Max/Min Temp 64 46 52 43
Wind Dir W W N NE NE NE E NE N N N N N NE W W W
Wind (mph) 4 3 5 6 8 5 3 2 3 5 8 6 5 4 3 2 2
Wind Gust (mph)
Precip Prob (%) 5 20 30 60 70 60 70 80 60 80 80 60 60 60 40 40 10
Precip Type R R R R R R R R R R R R R R R R
6 Hour QPF 0.00 0.11 0.41 0.32 0.37 0.28 0.14 0.02
12 Hour QPF 0.11 0.73 0.65 0.16
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) 11.5 11.3 11.5 12.0 11.9 11.8 11.5 11.6 11.0 10.7 10.8 10.9 10.8 10.8 10.9 10.7 10.5
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Highwood Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 SC SC OV OV OV OV OV OV OV OV OV OV OV BK BK
Cloud Cover (%) 35 10 35 40 70 90 95 90 100 85 85 85 85 85 75 65 55
Temperature 52 54 61 64 62 56 54 52 51 51 53 56 55 50 48 47 46
Max/Min Temp 64 50 57 46
Wind Dir W W NW N NE NE E E NE NE NE NE E SE S S S
Wind (mph) 5 4 5 6 5 5 4 4 4 5 6 6 5 6 5 4 3
Wind Gust (mph)
Precip Prob (%) 0 5 10 20 30 40 50 50 30 50 40 10 40 40 20 20 5
Precip Type R R R R R R R R R R R R
6 Hour QPF 0.00 0.00 0.01 0.25 0.21 0.09 0.11 0.01
12 Hour QPF 0.00 0.26 0.30 0.12
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) 11.7 11.5 11.3 11.3 11.4 11.5 11.4 11.1 10.6 10.0 10.3 10.5 10.7 10.5 10.8 10.5 10.3
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Snowy/Judith Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 SC BK OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 35 30 35 55 85 95 95 95 100 95 95 95 100 95 95 95 85
Temperature 53 57 66 67 63 56 54 52 50 49 51 52 51 49 49 48 46
Max/Min Temp 68 48 53 45
Wind Dir W NW NW N NE NE NE NE NE NE NE N NE N N N N
Wind (mph) 5 5 5 6 6 5 5 4 6 8 8 8 6 6 5 4 4
Wind Gust (mph)
Precip Prob (%) 5 5 20 30 40 50 60 80 60 80 80 80 80 80 70 70 60
Precip Type R R R R R R R R R R R R R R R
6 Hour QPF 0.00 0.04 0.12 0.22 0.32 0.45 0.33 0.10
12 Hour QPF 0.04 0.34 0.77 0.43
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) 11.9 11.6 11.5 11.8 11.9 11.8 11.7 11.5 11.4 11.1 11.3 11.2 11.1 11.1 11.0 11.0 11.0
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Bears Paw Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 SC SC OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 45 20 30 35 75 85 85 80 100 90 95 95 100 85 85 80 75
Temperature 50 55 64 67 64 55 52 50 48 51 58 60 57 50 48 47 46
Max/Min Temp 67 47 60 45
Wind Dir NW NW N N NE NE NE E NE NE NE NE E E E E SE
Wind (mph) 3 3 4 6 6 8 6 5 5 6 8 6 5 5 3 3 2
Wind Gust (mph)
Precip Prob (%) 5 5 5 10 5 5 5 5 5 20 10 5 30 30 20 20 10
Precip Type R R R R R
6 Hour QPF 0.00 0.00 0.00 0.00 0.01 0.08 0.08 0.04
12 Hour QPF 0.00 0.00 0.09 0.12
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) 12.2 12.0 11.8 11.5 11.3 11.1 10.8 10.5 9.9 9.5 9.9 10.2 10.2 10.5 10.6 10.5 10.3
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Castle/Crazy Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 BK OV OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 50 35 60 80 90 95 95 95 95 95 95 90 80 85 85 85 75
Temperature 50 52 61 64 58 52 51 50 49 48 49 50 48 46 46 45 44
Max/Min Temp 64 47 51 43
Wind Dir W W W E E NE E NE NE N N N N NE NW W W
Wind (mph) 5 5 4 5 8 9 6 6 6 6 6 6 5 5 4 4 4
Wind Gust (mph)
Precip Prob (%) 5 20 40 60 70 70 80 80 80 90 90 70 70 70 50 50 20
Precip Type R R R R R R R R R R R R R R R R
6 Hour QPF 0.00 0.05 0.36 0.44 0.44 0.49 0.21 0.05
12 Hour QPF 0.05 0.80 0.93 0.26
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) 11.6 11.6 11.8 12.2 12.2 12.2 11.9 11.7 11.4 11.1 10.9 11.0 11.0 10.9 10.9 10.8 10.5
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Bridger Range...
Date Friday 09/18/26 Saturday 09/19/26
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 BK OV OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 55 45 65 70 85 95 95 90 95 95 95 90 90 85 90 85 75
Temperature 50 51 59 62 57 50 50 49 49 47 48 49 47 45 45 45 44
Max/Min Temp 62 46 49 43
Wind Dir SW SW S E NE E NE NE N N NW N N NW NW W W
Wind (mph) 2 3 3 3 4 6 5 5 4 4 4 4 3 4 2 2 2
Wind Gust (mph)
Precip Prob (%) 20 20 40 50 60 80 80 90 80 90 90 60 70 70 50 50 20
Precip Type R R R T R R R R R R R R R R R R R
6 Hour QPF 0.00 0.07 0.24 0.31 0.47 0.45 0.19 0.06
12 Hour QPF 0.07 0.55 0.92 0.25
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) 11.8 11.8 11.9 12.2 12.3 12.3 11.9 11.6 11.4 11.2 11.1 11.0 11.0 10.9 10.7 10.7 10.6
Snow Density (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...Madison Range/Spanish Peaks...
Date Friday 09/18/26 Saturday 09/19/26
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 OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 75 60 75 75 90 95 80 75 80 80 90 95 90 90 85 85 85
Temperature 44 45 53 55 51 46 45 44 43 42 44 45 43 41 41 41 40
Max/Min Temp 56 41 46 39
Wind Dir S S SE SE S SE E SE SE SW W W NW NW NW W W
Wind (mph) 5 4 4 5 4 4 3 2 2 3 4 5 4 4 2 3 2
Wind Gust (mph)
Precip Prob (%) 70 40 60 70 70 70 60 60 70 60 70 80 70 70 60 60 30
Precip Type R R R R R R R R R R R R R R R R R
6 Hour QPF 0.02 0.09 0.14 0.08 0.15 0.25 0.09 0.05
12 Hour QPF 0.11 0.22 0.40 0.14
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) 12.1 12.1 12.2 12.3 12.2 11.9 11.5 11.3 11.0 10.9 11.0 11.0 10.9 10.8 10.6 10.6 10.7
Snow Density (%) 0 0 0 0 0 0 100 100 100 100 100 100 100 100 100 100 100
...Gallatin Range/Hyalite Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 OV OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 70 60 65 75 90 90 90 85 85 85 95 95 100 90 90 85 85
Temperature 46 47 55 57 52 47 46 46 44 43 45 46 44 43 42 42 41
Max/Min Temp 58 42 47 40
Wind Dir S S S S SE SE NW E SE W NW NW NW NW W W W
Wind (mph) 5 4 4 4 4 4 3 2 2 3 4 5 4 3 3 2 3
Wind Gust (mph)
Precip Prob (%) 60 40 50 60 70 80 60 80 70 70 80 90 80 80 60 60 50
Precip Type R R R R R R R R R R R R R R R R R
6 Hour QPF 0.01 0.05 0.19 0.13 0.22 0.37 0.18 0.09
12 Hour QPF 0.06 0.32 0.59 0.27
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) 11.9 12.0 12.2 12.2 12.3 12.1 11.7 11.5 11.2 11.0 11.1 11.1 10.9 10.7 10.7 10.6 10.7
Snow Density (%) 0 0 0 0 0 0 0 0 100 100 100 100 100 100 100 100 100
...Lionhead Range...
Date Friday 09/18/26 Saturday 09/19/26
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 OV OV OV OV OV OV OV OV OV OV BK OV OV OV OV
Cloud Cover (%) 60 55 95 80 90 100 80 75 90 85 85 85 65 90 85 85 80
Temperature 43 46 57 59 54 47 45 44 42 43 48 51 49 43 41 39 38
Max/Min Temp 61 40 52 37
Wind Dir SE NE S S S S NW S S SW SW SW SW NW SW SW SW
Wind (mph) 2 2 3 3 1 2 2 1 1 2 4 4 2 2 1 0 0
Wind Gust (mph)
Precip Prob (%) 40 30 90 70 80 70 60 60 70 60 80 30 40 40 40 40 10
Precip Type R R R R R R R R R R R T R R R R
6 Hour QPF 0.03 0.14 0.13 0.06 0.07 0.06 0.01 0.00
12 Hour QPF 0.17 0.19 0.13 0.01
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) 12.5 12.4 12.3 12.4 12.1 11.9 11.6 11.3 11.0 10.7 10.6 10.8 10.8 10.8 10.7 10.6 10.6
Snow Density (%) 0 0 0 0 0 0 0 0 0 100 100 0 0 0 100 100 100
...Tobacco Root Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 75 60 70 85 90 95 90 95 90 85 95 95 80 85 75 85 70
Temperature 47 48 53 55 50 46 46 46 45 44 44 45 43 42 42 42 40
Max/Min Temp 55 43 46 40
Wind Dir SW S SE SE N N NE NE NE N N N N N NW W W
Wind (mph) 5 3 4 5 5 6 5 5 5 4 5 5 5 4 3 3 3
Wind Gust (mph)
Precip Prob (%) 60 40 60 80 70 80 70 80 80 70 80 90 70 70 50 50 20
Precip Type R R R R R R R R R R R R R R R R S
6 Hour QPF 0.04 0.14 0.25 0.28 0.28 0.34 0.09 0.02
12 Hour QPF 0.18 0.53 0.62 0.11
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) 11.9 11.9 12.1 12.2 12.2 11.8 11.6 11.4 11.2 10.9 11.0 11.0 11.0 10.8 10.9 10.7 10.5
Snow Density (%) 0 0 0 0 0 0 0 100 100 100 100 100 100 100 100 100 100
...Snowcrest/Gravelly/Ruby/Blacktail Ranges...
Date Friday 09/18/26 Saturday 09/19/26
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 OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 75 65 75 75 85 85 80 75 80 85 85 90 85 80 80 85 80
Temperature 46 47 54 57 53 47 46 46 44 44 46 48 47 43 43 42 41
Max/Min Temp 58 42 49 40
Wind Dir S SE SE SE SE N N N E SW SW NW NW N NW NW W
Wind (mph) 5 4 5 6 6 6 4 4 4 4 5 6 6 6 4 4 3
Wind Gust (mph)
Precip Prob (%) 60 50 60 60 70 70 60 60 60 50 70 80 60 60 40 40 10
Precip Type R R R R R R R R R R R R R R R R R
6 Hour QPF 0.03 0.09 0.15 0.13 0.11 0.17 0.05 0.01
12 Hour QPF 0.12 0.28 0.28 0.06
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) 12.1 12.1 12.2 12.2 11.9 11.7 11.4 11.0 10.9 10.7 10.9 11.0 10.9 10.8 10.6 10.6 10.5
Snow Density (%) 0 0 0 0 0 0 0 100 100 100 100 100 100 100 100 100 100
...Centennial Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 OV OV OV OV OV BK OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 60 65 85 80 85 85 75 70 85 85 75 80 85 85 80 80 70
Temperature 46 46 52 55 52 47 47 46 44 43 45 48 47 44 43 42 41
Max/Min Temp 57 42 49 40
Wind Dir SE SE SE S S SE SE NE SE S S SW W NW NW NW NW
Wind (mph) 5 6 6 6 5 6 4 4 4 5 5 5 4 5 4 4 4
Wind Gust (mph)
Precip Prob (%) 40 50 80 70 70 70 60 50 50 60 60 40 40 40 40 40 10
Precip Type R R R R R R R R R R R T R R R R R
6 Hour QPF 0.04 0.13 0.12 0.09 0.08 0.06 0.01 0.01
12 Hour QPF 0.17 0.21 0.14 0.02
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) 12.4 12.3 12.2 12.2 11.9 11.6 11.3 11.0 10.8 10.6 10.6 10.7 10.8 10.8 10.7 10.6 10.7
Snow Density (%) 0 0 0 0 0 0 0 100 100 100 100 100 100 100 100 100 100
...Anaconda/Highland Ranges...
Date Friday 09/18/26 Saturday 09/19/26
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 OV OV OV OV OV OV OV OV OV BK BK BK SC
Cloud Cover (%) 70 70 75 85 90 95 90 90 95 85 90 90 70 70 60 55 50
Temperature 45 46 54 56 50 47 47 47 46 45 47 48 47 45 43 42 40
Max/Min Temp 57 44 49 40
Wind Dir SW E SW N N N N N N N N N N NW NW W SW
Wind (mph) 3 3 3 4 5 5 6 6 5 4 4 4 4 3 3 2 2
Wind Gust (mph)
Precip Prob (%) 40 40 60 80 80 80 60 70 90 80 80 80 20 20 5 5 0
Precip Type R R R R R R R R R R R R T R
6 Hour QPF 0.06 0.14 0.28 0.18 0.22 0.18 0.02 0.00
12 Hour QPF 0.20 0.46 0.40 0.02
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) 11.4 11.4 11.5 11.7 11.6 11.4 11.3 11.2 11.1 11.0 11.0 11.1 11.1 10.9 10.6 10.5 10.2
Snow Density (%) 0 0 0 0 0 0 0 0 100 100 100 0 0 0 0 0 0
...Pioneer Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 OV OV OV OV OV OV OV OV OV OV OV OV BK SC
Cloud Cover (%) 70 60 65 90 95 95 90 90 95 90 90 95 80 75 70 65 50
Temperature 45 45 53 55 50 46 46 45 44 43 46 47 46 44 42 41 39
Max/Min Temp 56 42 48 39
Wind Dir SW SE SE N N N N N N N N N N N NW W W
Wind (mph) 3 3 4 5 5 5 5 5 5 4 4 5 4 3 3 3 3
Wind Gust (mph)
Precip Prob (%) 50 40 50 80 80 90 60 80 80 80 70 90 40 40 5 5 5
Precip Type R R R R R R R R R R R R R R
6 Hour QPF 0.10 0.15 0.34 0.21 0.20 0.19 0.02 0.00
12 Hour QPF 0.25 0.55 0.39 0.02
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) 11.6 11.6 11.8 12.0 11.8 11.4 11.3 11.1 11.0 10.9 11.0 11.1 11.0 10.8 10.6 10.2 10.0
Snow Density (%) 0 0 0 0 0 0 100 100 100 100 100 100 100 100 100 100 100
...Beaverhead/Tendoy Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 OV OV OV OV OV OV OV OV OV OV OV OV OV BK BK
Cloud Cover (%) 65 65 70 85 90 90 90 85 90 85 90 90 80 75 70 65 60
Temperature 44 45 52 54 49 45 44 44 43 43 45 48 46 43 42 41 40
Max/Min Temp 55 41 48 39
Wind Dir S SE SE S W NW N NW W N N NW N N NW NW W
Wind (mph) 4 4 5 6 5 6 6 5 5 5 5 6 5 5 4 4 4
Wind Gust (mph)
Precip Prob (%) 50 40 60 80 80 70 80 70 60 70 70 70 50 50 10 10 5
Precip Type R R R R R R R R R R R R R R R R
6 Hour QPF 0.05 0.15 0.26 0.19 0.12 0.12 0.02 0.00
12 Hour QPF 0.20 0.45 0.24 0.02
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) 11.9 11.8 11.9 11.8 11.7 11.3 11.1 10.9 10.7 10.7 10.9 11.0 11.1 11.0 10.7 10.5 10.3
Snow Density (%) 0 0 0 0 0 100 100 100 100 100 100 100 100 100 100 100 100
...Absoraka-Beartooth/Cooke City Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 BK OV OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 70 60 70 90 90 90 90 75 85 85 95 100 90 90 95 95 90
Temperature 38 41 52 54 47 43 42 41 40 40 43 43 41 38 38 37 36
Max/Min Temp 56 38 45 36
Wind Dir S S SW S SE SE NE E SW SW SW W W NW W W W
Wind (mph) 4 4 5 5 3 4 4 3 2 3 4 5 5 4 3 3 3
Wind Gust (mph)
Precip Prob (%) 40 30 50 80 90 80 50 60 70 60 70 80 80 80 70 70 60
Precip Type
6 Hour QPF 0.01 0.09 0.15 0.05 0.19 0.25 0.15 0.07
12 Hour QPF 0.10 0.20 0.44 0.22
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) 12.1 12.1 12.3 12.4 12.5 12.3 12.2 11.8 11.5 11.2 11.3 11.0 10.9 10.8 10.7 10.6 10.6
Snow Density (%) 0 0 0 0 0 0 100 100 50 50 50 50 50 50 50 50 50
...Absoraka Mountains Above 6000ft Northeast Facing...
Date Friday 09/18/26 Saturday 09/19/26
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 BK OV OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 55 55 70 85 90 95 90 85 85 90 100 95 95 95 90 95 90
Temperature 46 49 56 56 50 46 46 45 44 43 44 44 43 41 41 41 40
Max/Min Temp 58 42 46 39
Wind Dir SW SW SE SE SE SE NE NE NW W NW NW NW NW W W W
Wind (mph) 9 8 5 5 5 5 3 3 3 4 5 6 6 6 4 4 4
Wind Gust (mph)
Precip Prob (%) 30 30 50 80 90 90 70 70 70 80 80 90 90 90 80 80 70
Precip Type
6 Hour QPF 0.01 0.09 0.20 0.19 0.35 0.45 0.31 0.12
12 Hour QPF 0.10 0.39 0.80 0.43
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 0.1 0.0
12 Hour Snow 0.0 0.0 0.0 0.1
Low End Snow MM MM MM MM
High End Snow MM MM MM MM
Snow Level (kft) 12.0 12.1 12.4 12.5 12.5 12.4 12.1 11.9 11.6 11.3 11.3 11.1 11.0 10.8 10.8 10.8 10.8
Snow Density (%) 0 0 0 0 0 0 100 100 100 100 50 50 50 50 50 50 50
...Absoraka Mountains Above 6000ft West Facing...
Date Friday 09/18/26 Saturday 09/19/26
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 OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 70 60 70 85 90 90 85 80 85 80 90 95 90 90 90 90 85
Temperature 42 45 55 57 52 47 46 44 43 42 46 47 45 42 41 40 40
Max/Min Temp 59 41 48 39
Wind Dir S S S S SE SE NE E S SW W W NW NW W W W
Wind (mph) 4 4 4 5 4 4 3 2 2 3 4 5 4 4 3 2 2
Wind Gust (mph) 21 23
Precip Prob (%) 60 30 50 80 80 70 60 60 70 60 70 80 70 70 60 60 50
Precip Type R R R R R R R R R R R R R R R R R
6 Hour QPF 0.01 0.09 0.15 0.07 0.15 0.22 0.11 0.05
12 Hour QPF 0.10 0.22 0.37 0.16
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) 12.2 12.1 12.3 12.4 12.4 12.1 11.9 11.6 11.3 11.0 11.1 11.0 10.9 10.8 10.7 10.6 10.7
Snow Density (%) 0 0 0 0 0 0 0 0 100 100 100 100 100 100 100 100 100
...Crazy Mountains...
Date Friday 09/18/26 Saturday 09/19/26
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 BK OV OV OV OV OV OV OV OV OV OV OV OV OV OV
Cloud Cover (%) 55 45 60 80 90 95 95 95 95 95 100 95 95 90 90 90 85
Temperature 49 52 58 60 55 50 49 48 47 46 46 46 45 45 44 44 42
Max/Min Temp 61 45 48 42
Wind Dir W W S E E NE NE NE N N N N N N W W W
Wind (mph) 8 6 4 5 8 10 6 6 6 5 6 6 5 6 4 4 5
Wind Gust (mph)
Precip Prob (%) 5 20 40 60 80 90 90 90 80 90 100 70 80 80 70 70 50
Precip Type R R R R R R R R R R R R R R R R
6 Hour QPF 0.00 0.09 0.34 0.48 0.66 0.65 0.36 0.12
12 Hour QPF 0.09 0.82 1.31 0.48
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) 11.8 11.8 12.1 12.4 12.3 12.3 12.1 11.9 11.5 11.2 11.1 11.1 11.1 10.9 10.9 10.9 10.6
Snow Density (%) 0 0 0 0 0 0 0 0 0 100 100 0 0 0 0 0 0
$$
--- Precip Type Codes ---
CODE TYPE
T Thunderstorms
R Rain
S Snow
I Sleet
Z Freezing Rain