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

Select A Zone:

Bridgeport Winter Recreation Area
Avalanche Report

Report not available. See BAC for more information.

Issued at: Saturday, April 22, 2023 7:00AM
Issued by: BAC

Eastside Region
Avalanche Report

Report not available. See ESAC for more information.

Issued at: Sunday, April 30, 2023 7:00AM
Issued by: ESAC

Mount Shasta
Avalanche Report

Report not available. See MSAC for more information.

Issued at: Sunday, April 16, 2023 5:56AM
Issued by: MSAC

Central Sierra Nevada
Avalanche Report

Report not available. See SAC for more information.

Issued at: Monday, May 01, 2023 7:00AM
Issued by: SAC


Sunlight Angles

Time of day Lighting (Az/Z)
2023-04-23 06:20AM Shade 74 by 1
2023-04-23 07:50AM Shade 88 by 18
2023-04-23 09:20AM Shade 103 by 36
2023-04-23 10:50AM Shade 124 by 52
2023-04-23 12:20PM Shade 160 by 63
2023-04-23 01:50PM Shade 208 by 62
2023-04-23 03:20PM Shade 241 by 49
2023-04-23 04:50PM Shade 260 by 33
2023-04-23 06:20PM Shade 275 by 15


Sunlight Angles

Time of day Lighting (Az/Z)
2023-05-01 06:10AM Shade 72 by 1
2023-05-01 07:40AM Shade 85 by 18
2023-05-01 09:10AM Shade 99 by 36
2023-05-01 10:40AM Shade 118 by 53
2023-05-01 12:10PM Shade 154 by 66
2023-05-01 01:40PM Shade 208 by 65
2023-05-01 03:10PM Shade 243 by 52
2023-05-01 04:40PM Shade 262 by 35
2023-05-01 06:10PM Shade 276 by 18


Sunlight Angles

Time of day Lighting (Az/Z)
2023-04-17 06:40AM Shade 77 by 2
2023-04-17 08:10AM Shade 92 by 18
2023-04-17 09:40AM Shade 109 by 35
2023-04-17 11:10AM Shade 131 by 50
2023-04-17 12:40PM Shade 166 by 59
2023-04-17 02:10PM Shade 208 by 56
2023-04-17 03:40PM Shade 238 by 45
2023-04-17 05:10PM Shade 258 by 29
2023-04-17 06:40PM Shade 273 by 12


Sunlight Angles

Time of day Lighting (Az/Z)
2023-05-02 06:10AM Shade 71 by 1
2023-05-02 07:40AM Shade 84 by 18
2023-05-02 09:10AM Shade 99 by 35
2023-05-02 10:40AM Shade 118 by 52
2023-05-02 12:10PM Shade 153 by 64
2023-05-02 01:40PM Shade 205 by 65
2023-05-02 03:10PM Shade 240 by 53
2023-05-02 04:40PM Shade 260 by 36
2023-05-02 06:10PM Shade 275 by 19
2023-05-02 07:40PM Shade 289 by 2

Change Regions:
Buy Me a Coffee at ko-fi.com
If you enjoyed this or found it helpful, please consider buying an espresso to keep the flow going.

Show Known Issues