Montana Avalanche Map Layers


"What's the danger?" Here are autogenerated DEM Shading rules for each advisory zone that allow for quickly adding avalanche danger, problems, and sun angle layers to CalTopo maps. Reports sourced from avalanche.org.

Show Instructions

Flathead Range & Glacier NP
Avalanche Report

Report not available. See FAC for more information.

Issued at: Friday, April 19, 2024 4:01PM
Issued by: FAC

Swan Range
Avalanche Report

Report not available. See FAC for more information.

Issued at: Friday, April 19, 2024 4:01PM
Issued by: FAC

Whitefish Range
Avalanche Report

Report not available. See FAC for more information.

Issued at: Friday, April 19, 2024 4:01PM
Issued by: FAC

Bridger Range
Avalanche Report

Report not available. See GNFAC for more information.

Cooke City
Avalanche Report

Report not available. See GNFAC for more information.

Issued at: Friday, April 19, 2024 6:54AM
Issued by: GNFAC

Island Park
Avalanche Report

Report not available. See GNFAC for more information.

Issued at: Friday, April 19, 2024 6:54AM
Issued by: GNFAC

Lionhead Area
Avalanche Report

Report not available. See GNFAC for more information.

Issued at: Friday, April 19, 2024 6:54AM
Issued by: GNFAC

Northern Gallatin Range
Avalanche Report

Report not available. See GNFAC for more information.

Issued at: Friday, April 19, 2024 6:54AM
Issued by: GNFAC

Northern Madison Range
Avalanche Report

Report not available. See GNFAC for more information.

Issued at: Friday, April 19, 2024 6:54AM
Issued by: GNFAC

Southern Gallatin Range
Avalanche Report

Report not available. See GNFAC for more information.

Issued at: Friday, April 19, 2024 6:54AM
Issued by: GNFAC

Southern Madison Range
Avalanche Report

Report not available. See GNFAC for more information.

Issued at: Friday, April 19, 2024 6:54AM
Issued by: GNFAC

Kootenai
Avalanche Report

Report not available. See IPAC for more information.

Issued at: Saturday, March 30, 2024 6:30AM
Issued by: IPAC

Bitterroot
Avalanche Report

Report not available. See WCMAC for more information.

Issued at: Monday, April 01, 2024 1:00AM
Issued by: WCMAC

Rattlesnake
Avalanche Report

Report not available. See WCMAC for more information.

Issued at: Monday, April 01, 2024 1:00AM
Issued by: WCMAC

Seeley Lake
Avalanche Report

Report not available. See WCMAC for more information.

Issued at: Monday, April 01, 2024 1:00AM
Issued by: WCMAC


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-20 06:50AM Shade 74 by 2
2024-04-20 08:20AM Shade 91 by 17
2024-04-20 09:50AM Shade 109 by 31
2024-04-20 11:20AM Shade 131 by 44
2024-04-20 12:50PM Shade 162 by 52
2024-04-20 02:20PM Shade 199 by 52
2024-04-20 03:50PM Shade 230 by 44
2024-04-20 05:20PM Shade 252 by 31
2024-04-20 06:50PM Shade 270 by 16
2024-04-20 08:20PM Shade 287 by 1


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-20 06:50AM Shade 74 by 2
2024-04-20 08:20AM Shade 90 by 16
2024-04-20 09:50AM Shade 108 by 31
2024-04-20 11:20AM Shade 131 by 44
2024-04-20 12:50PM Shade 162 by 53
2024-04-20 02:20PM Shade 199 by 53
2024-04-20 03:50PM Shade 230 by 44
2024-04-20 05:20PM Shade 252 by 31
2024-04-20 06:50PM Shade 270 by 16
2024-04-20 08:20PM Shade 286 by 1


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-20 06:50AM Shade 73 by 1
2024-04-20 08:20AM Shade 90 by 16
2024-04-20 09:50AM Shade 108 by 31
2024-04-20 11:20AM Shade 131 by 43
2024-04-20 12:50PM Shade 161 by 52
2024-04-20 02:20PM Shade 197 by 52
2024-04-20 03:50PM Shade 228 by 44
2024-04-20 05:20PM Shade 251 by 31
2024-04-20 06:50PM Shade 269 by 17
2024-04-20 08:20PM Shade 286 by 2


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-21 06:40AM Shade 74 by 1
2024-04-21 08:10AM Shade 90 by 17
2024-04-21 09:40AM Shade 107 by 32
2024-04-21 11:10AM Shade 130 by 46
2024-04-21 12:40PM Shade 162 by 55
2024-04-21 02:10PM Shade 201 by 55
2024-04-21 03:40PM Shade 232 by 46
2024-04-21 05:10PM Shade 254 by 32
2024-04-21 06:40PM Shade 271 by 16
2024-04-21 08:10PM Shade 287 by 1


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-20 06:40AM Shade 75 by 2
2024-04-20 08:10AM Shade 91 by 17
2024-04-20 09:40AM Shade 108 by 33
2024-04-20 11:10AM Shade 130 by 47
2024-04-20 12:40PM Shade 163 by 56
2024-04-20 02:10PM Shade 202 by 55
2024-04-20 03:40PM Shade 234 by 45
2024-04-20 05:10PM Shade 255 by 31
2024-04-20 06:40PM Shade 272 by 15


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-20 06:50AM Shade 75 by 2
2024-04-20 08:20AM Shade 91 by 18
2024-04-20 09:50AM Shade 108 by 34
2024-04-20 11:20AM Shade 131 by 48
2024-04-20 12:50PM Shade 164 by 56
2024-04-20 02:20PM Shade 204 by 55
2024-04-20 03:50PM Shade 235 by 45
2024-04-20 05:20PM Shade 256 by 30
2024-04-20 06:50PM Shade 273 by 15


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-20 06:40AM Shade 74 by 1
2024-04-20 08:10AM Shade 89 by 16
2024-04-20 09:40AM Shade 106 by 32
2024-04-20 11:10AM Shade 128 by 46
2024-04-20 12:40PM Shade 161 by 56
2024-04-20 02:10PM Shade 200 by 56
2024-04-20 03:40PM Shade 232 by 46
2024-04-20 05:10PM Shade 254 by 32
2024-04-20 06:40PM Shade 271 by 16


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-20 06:40AM Shade 74 by 1
2024-04-20 08:10AM Shade 90 by 17
2024-04-20 09:40AM Shade 107 by 32
2024-04-20 11:10AM Shade 129 by 46
2024-04-20 12:40PM Shade 161 by 55
2024-04-20 02:10PM Shade 200 by 55
2024-04-20 03:40PM Shade 232 by 46
2024-04-20 05:10PM Shade 254 by 32
2024-04-20 06:40PM Shade 271 by 16


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-20 06:40AM Shade 74 by 1
2024-04-20 08:10AM Shade 90 by 16
2024-04-20 09:40AM Shade 107 by 32
2024-04-20 11:10AM Shade 129 by 46
2024-04-20 12:40PM Shade 161 by 55
2024-04-20 02:10PM Shade 200 by 55
2024-04-20 03:40PM Shade 232 by 46
2024-04-20 05:10PM Shade 254 by 32
2024-04-20 06:40PM Shade 271 by 16
2024-04-20 08:10PM Shade 287 by 1


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-20 06:40AM Shade 74 by 1
2024-04-20 08:10AM Shade 90 by 17
2024-04-20 09:40AM Shade 107 by 32
2024-04-20 11:10AM Shade 129 by 46
2024-04-20 12:40PM Shade 161 by 56
2024-04-20 02:10PM Shade 201 by 55
2024-04-20 03:40PM Shade 232 by 46
2024-04-20 05:10PM Shade 254 by 32
2024-04-20 06:40PM Shade 271 by 16


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-20 06:40AM Shade 74 by 1
2024-04-20 08:10AM Shade 90 by 16
2024-04-20 09:40AM Shade 107 by 32
2024-04-20 11:10AM Shade 129 by 46
2024-04-20 12:40PM Shade 161 by 56
2024-04-20 02:10PM Shade 200 by 55
2024-04-20 03:40PM Shade 232 by 46
2024-04-20 05:10PM Shade 254 by 32
2024-04-20 06:40PM Shade 271 by 16


Sunlight Angles

Time of day Lighting (Az/Z)
2024-03-31 07:30AM Shade 84 by 1
2024-03-31 09:00AM Shade 101 by 15
2024-03-31 10:30AM Shade 120 by 29
2024-03-31 12:00PM Shade 144 by 40
2024-03-31 01:30PM Shade 174 by 46
2024-03-31 03:00PM Shade 205 by 43
2024-03-31 04:30PM Shade 232 by 34
2024-03-31 06:00PM Shade 252 by 21
2024-03-31 07:30PM Shade 270 by 6


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-02 07:30AM Shade 84 by 2
2024-04-02 09:00AM Shade 101 by 17
2024-04-02 10:30AM Shade 120 by 32
2024-04-02 12:00PM Shade 144 by 44
2024-04-02 01:30PM Shade 176 by 49
2024-04-02 03:00PM Shade 209 by 46
2024-04-02 04:30PM Shade 235 by 35
2024-04-02 06:00PM Shade 255 by 21
2024-04-02 07:30PM Shade 272 by 6


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-02 07:20AM Shade 83 by 1
2024-04-02 08:50AM Shade 100 by 16
2024-04-02 10:20AM Shade 118 by 30
2024-04-02 11:50AM Shade 142 by 42
2024-04-02 01:20PM Shade 173 by 48
2024-04-02 02:50PM Shade 206 by 46
2024-04-02 04:20PM Shade 233 by 36
2024-04-02 05:50PM Shade 253 by 22
2024-04-02 07:20PM Shade 270 by 7


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-02 07:20AM Shade 83 by 1
2024-04-02 08:50AM Shade 100 by 16
2024-04-02 10:20AM Shade 119 by 31
2024-04-02 11:50AM Shade 143 by 42
2024-04-02 01:20PM Shade 174 by 48
2024-04-02 02:50PM Shade 206 by 45
2024-04-02 04:20PM Shade 233 by 36
2024-04-02 05:50PM Shade 253 by 22
2024-04-02 07:20PM Shade 271 by 7

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