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

2024-05-13 Avalanche Danger

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

a0-0e11501-20310f f7941e
a0-0e9501-11500f f7941e
a0-0e0-9500f fff200

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2024-05-13 Wet Loose

• All aspects (above 11501')
• All aspects (9501' to 11500')
• All aspects (below 9500')

a293-293e11501-20310f A200FF
a293-293e9501-11500f A200FF
a293-293e0-9500f A200FF

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Issued at: Sunday, May 12, 2024 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2024-05-13 Avalanche Danger

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

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

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2024-05-13 Wet Loose

• All aspects (above 11501')
• All aspects (9501' to 11500')
• All aspects (below 9500')

a339-339e11501-20310f A200FF
a339-339e9501-11500f A200FF
a339-339e0-9500f A200FF

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Issued at: Sunday, May 12, 2024 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2024-05-13 Avalanche Danger

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

a0-0e11501-20310f f7941e
a0-0e9501-11500f f7941e
a0-0e0-9500f fff200

Copy to clipboard

2024-05-13 Wet Loose

• All aspects (above 11501')
• All aspects (9501' to 11500')
• All aspects (below 9500')

a248-248e11501-20310f A200FF
a248-248e9501-11500f A200FF
a248-248e0-9500f A200FF

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Issued at: Sunday, May 12, 2024 4:30PM
Issued by: CAIC

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-13 06:10AM Shade	67 by 1 Copy to clipboard
2024-05-13 07:40AM Shade	80 by 18 Copy to clipboard
2024-05-13 09:10AM Shade	93 by 36 Copy to clipboard
2024-05-13 10:40AM Shade	111 by 53 Copy to clipboard
2024-05-13 12:10PM Shade	144 by 67 Copy to clipboard
2024-05-13 01:40PM Shade	204 by 69 Copy to clipboard
2024-05-13 03:10PM Shade	244 by 57 Copy to clipboard
2024-05-13 04:40PM Shade	263 by 40 Copy to clipboard
2024-05-13 06:10PM Shade	277 by 22 Copy to clipboard
2024-05-13 07:40PM Shade	290 by 5 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-13 06:10AM Shade	67 by 1 Copy to clipboard
2024-05-13 07:40AM Shade	80 by 18 Copy to clipboard
2024-05-13 09:10AM Shade	94 by 35 Copy to clipboard
2024-05-13 10:40AM Shade	112 by 52 Copy to clipboard
2024-05-13 12:10PM Shade	145 by 66 Copy to clipboard
2024-05-13 01:40PM Shade	201 by 68 Copy to clipboard
2024-05-13 03:10PM Shade	241 by 56 Copy to clipboard
2024-05-13 04:40PM Shade	262 by 40 Copy to clipboard
2024-05-13 06:10PM Shade	276 by 23 Copy to clipboard
2024-05-13 07:40PM Shade	290 by 6 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-13 06:00AM Shade	66 by 1 Copy to clipboard
2024-05-13 07:30AM Shade	80 by 17 Copy to clipboard
2024-05-13 09:00AM Shade	94 by 34 Copy to clipboard
2024-05-13 10:30AM Shade	112 by 51 Copy to clipboard
2024-05-13 12:00PM Shade	143 by 65 Copy to clipboard
2024-05-13 01:30PM Shade	198 by 68 Copy to clipboard
2024-05-13 03:00PM Shade	239 by 57 Copy to clipboard
2024-05-13 04:30PM Shade	260 by 41 Copy to clipboard
2024-05-13 06:00PM Shade	275 by 23 Copy to clipboard
2024-05-13 07:30PM Shade	289 by 7 Copy to clipboard

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