Colorado Avalanche Map Layers

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"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

Digital Elevation Model (DEM) shading let's you create custom shading schemes based on elevation, slope, aspect and tree cover.

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Avalanche Report

Danger report updates are fetched at 7:33pm and 7:33am. The selected elevation bands are not meant to be exact, but represent a characteristic of the terrain which varies locally.

The highest band typically includes alpine areas beginning as the treeline transitions into open slopes extending to ridges and peaks.

The middle band is typically a narrow transition zone between dense forests and treeless alpine areas.

The lowest band typically extends from valley floors or snowline to near treeline.

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Usage

You'll find that Terrain Modeling in the left pane will show layers that can be turned on and edited. The right pane will show Custom Layers that can be toggled on or off.

Select A Zone: CAIC zone CAIC zone CAIC zone

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Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Download Zone Shape

Download Zone Shape

Download Zone Shape

CAIC zone
Avalanche Report

2024-05-08 Avalanche Danger

• Moderate danger (above 11501')
• Moderate danger (9501' to 11500')
• Low danger (below 9500')

a0-0e11501-20310f fff200
a0-0e9501-11500f fff200
a0-0e0-9500f 50b848

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2024-05-08 Wind Slab

• N to S aspects (above 11501')
• N to S aspects (9501' to 11500')

a339-203e11501-20310f A200FF
a339-203e9501-11500f A200FF

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Issued at: Tuesday, May 07, 2024 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2024-05-08 Avalanche Danger

• Low danger (above 11501')
• Low danger (9501' to 11500')
• Low danger (below 9500')

a0-0e11501-20310f 50b848
a0-0e9501-11500f 50b848
a0-0e0-9500f 50b848

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Issued at: Tuesday, May 07, 2024 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2024-05-08 Avalanche Danger

• Moderate danger (above 11501')
• Low danger (9501' to 11500')
• Low danger (below 9500')

a0-0e11501-20310f fff200
a0-0e9501-11500f 50b848
a0-0e0-9500f 50b848

Copy to clipboard

2024-05-08 Wind Slab

• N to S aspects (above 11501')

a339-203e11501-20310f A200FF

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Issued at: Tuesday, May 07, 2024 4:30PM
Issued by: CAIC

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-08 06:10AM Shade	69 by 2 Copy to clipboard
2024-05-08 07:40AM Shade	83 by 18 Copy to clipboard
2024-05-08 09:10AM Shade	97 by 35 Copy to clipboard
2024-05-08 10:40AM Shade	117 by 52 Copy to clipboard
2024-05-08 12:10PM Shade	150 by 65 Copy to clipboard
2024-05-08 01:40PM Shade	203 by 66 Copy to clipboard
2024-05-08 03:10PM Shade	240 by 54 Copy to clipboard
2024-05-08 04:40PM Shade	261 by 38 Copy to clipboard
2024-05-08 06:10PM Shade	276 by 21 Copy to clipboard
2024-05-08 07:40PM Shade	289 by 4 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-08 06:20AM Shade	70 by 2 Copy to clipboard
2024-05-08 07:50AM Shade	83 by 19 Copy to clipboard
2024-05-08 09:20AM Shade	97 by 37 Copy to clipboard
2024-05-08 10:50AM Shade	115 by 54 Copy to clipboard
2024-05-08 12:20PM Shade	151 by 67 Copy to clipboard
2024-05-08 01:50PM Shade	209 by 67 Copy to clipboard
2024-05-08 03:20PM Shade	245 by 54 Copy to clipboard
2024-05-08 04:50PM Shade	264 by 37 Copy to clipboard
2024-05-08 06:20PM Shade	277 by 19 Copy to clipboard
2024-05-08 07:50PM Shade	291 by 2 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-08 06:10AM Shade	68 by 1 Copy to clipboard
2024-05-08 07:40AM Shade	82 by 18 Copy to clipboard
2024-05-08 09:10AM Shade	96 by 35 Copy to clipboard
2024-05-08 10:40AM Shade	115 by 52 Copy to clipboard
2024-05-08 12:10PM Shade	149 by 65 Copy to clipboard
2024-05-08 01:40PM Shade	203 by 67 Copy to clipboard
2024-05-08 03:10PM Shade	241 by 55 Copy to clipboard
2024-05-08 04:40PM Shade	261 by 38 Copy to clipboard
2024-05-08 06:10PM Shade	276 by 21 Copy to clipboard
2024-05-08 07:40PM Shade	289 by 4 Copy to clipboard

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