California 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

Bridgeport Avalanche Center
Avalanche Report

Report not available. See BAC for more information.

Issued at: Sunday, April 21, 2024 7:00AM
Issued by: BAC

Eastside Region
Avalanche Report

Report not available. See ESAC for more information.

Issued at: Monday, April 15, 2024 7:00AM
Issued by: ESAC

Mount Shasta
Avalanche Report

Report not available. See MSAC for more information.

Issued at: Sunday, April 14, 2024 6:48AM
Issued by: MSAC

Central Sierra Nevada
Avalanche Report

2024-04-22 Avalanche Danger
  • Moderate danger (above 8701')
  • Moderate danger (6201' to 8700')
  • Moderate danger (below 6200')
a0-0e8701-20310f fff200
a0-0e6201-8700f fff200
a0-0e0-6200f fff200
2024-04-22 Wet Loose
  • All aspects (above 8701')
  • All aspects (6201' to 8700')
  • All aspects (below 6200')
a158-158e8701-20310f A200FF
a158-158e6201-8700f A200FF
a158-158e0-6200f A200FF

Issued at: Sunday, April 21, 2024 6:28AM
Issued by: SAC


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-22 06:20AM Shade 75 by 1
2024-04-22 07:50AM Shade 88 by 18
2024-04-22 09:20AM Shade 103 by 36
2024-04-22 10:50AM Shade 124 by 52
2024-04-22 12:20PM Shade 160 by 63
2024-04-22 01:50PM Shade 209 by 62
2024-04-22 03:20PM Shade 241 by 49
2024-04-22 04:50PM Shade 260 by 32
2024-04-22 06:20PM Shade 275 by 15


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-16 06:30AM Shade 78 by 1
2024-04-16 08:00AM Shade 91 by 19
2024-04-16 09:30AM Shade 107 by 37
2024-04-16 11:00AM Shade 129 by 53
2024-04-16 12:30PM Shade 167 by 62
2024-04-16 02:00PM Shade 213 by 59
2024-04-16 03:30PM Shade 242 by 46
2024-04-16 05:00PM Shade 261 by 29
2024-04-16 06:30PM Shade 275 by 11


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-15 06:40AM Shade 78 by 1
2024-04-15 08:10AM Shade 92 by 18
2024-04-15 09:40AM Shade 109 by 35
2024-04-15 11:10AM Shade 132 by 49
2024-04-15 12:40PM Shade 166 by 58
2024-04-15 02:10PM Shade 208 by 56
2024-04-15 03:40PM Shade 238 by 44
2024-04-15 05:10PM Shade 258 by 29
2024-04-15 06:40PM Shade 273 by 12


Sunlight Angles

Time of day Lighting (Az/Z)
2024-04-22 06:30AM Shade 76 by 2
2024-04-22 08:00AM Shade 90 by 20
2024-04-22 09:30AM Shade 105 by 37
2024-04-22 11:00AM Shade 127 by 53
2024-04-22 12:30PM Shade 165 by 63
2024-04-22 02:00PM Shade 211 by 60
2024-04-22 03:30PM Shade 242 by 47
2024-04-22 05:00PM Shade 261 by 31
2024-04-22 06:30PM Shade 275 by 13

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