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 CAIC zone CAIC zone CAIC zone CAIC zone CAIC zone CAIC zone CAIC zone CAIC zone

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Pre-populated CalTopo Map

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Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

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CAIC zone
Avalanche Report

2023-12-04 Avalanche Danger

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

a0-0e11501-20310f ed1c24
a0-0e9501-11500f f7941e
a0-0e0-9500f fff200

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2023-12-04 Persistent Slab

• NW to SE aspects (above 11501')
• NW to SE aspects (9501' to 11500')
• NW to E aspects (below 9500')

a293-158e11501-20310f A200FF
a293-158e9501-11500f A200FF
a293-113e0-9500f A200FF

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Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2023-12-04 Avalanche Danger

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

a0-0e11501-20310f ed1c24
a0-0e9501-11500f ed1c24
a0-0e0-9500f f7941e

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2023-12-04 Persistent Slab

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

a293-113e11501-20310f A200FF
a293-113e9501-11500f A200FF
a293-113e0-9500f A200FF

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2023-12-04 Wind Slab

• NE to SE aspects (above 11501')
• NE to SE aspects (9501' to 11500')

a23-158e11501-20310f 0000FF
a23-158e9501-11500f 0000FF

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Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2023-12-04 Avalanche Danger

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

a0-0e11501-20310f ed1c24
a0-0e9501-11500f ed1c24
a0-0e0-9500f f7941e

Copy to clipboard

2023-12-04 Persistent Slab

• NW to E aspects (above 11501')
• NW to E aspects (9501' to 11500')

a293-113e11501-20310f A200FF
a293-113e9501-11500f A200FF

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2023-12-04 Storm Slab

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

a23-23e11501-20310f 0000FF
a23-23e9501-11500f 0000FF
a23-23e0-9500f 0000FF

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Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2023-12-04 Avalanche Danger

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

a0-0e11501-20310f ed1c24
a0-0e9501-11500f ed1c24
a0-0e0-9500f f7941e

Copy to clipboard

2023-12-04 Persistent Slab

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

a293-113e11501-20310f A200FF
a293-113e9501-11500f A200FF
a293-113e0-9500f A200FF

Copy to clipboard

2023-12-04 Storm Slab

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

a68-68e11501-20310f 0000FF
a68-68e9501-11500f 0000FF
a68-68e0-9500f 0000FF

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Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2023-12-04 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

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2023-12-04 Persistent Slab

• NW to E aspects (above 11501')

a293-113e11501-20310f A200FF

Copy to clipboard

Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2023-12-04 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

Copy to clipboard

2023-12-04 Persistent Slab

• NW to E aspects (above 11501')
• NW to E aspects (9501' to 11500')

a293-113e11501-20310f A200FF
a293-113e9501-11500f A200FF

Copy to clipboard

Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2023-12-04 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

2023-12-04 Persistent Slab

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

a293-113e11501-20310f A200FF
a293-113e9501-11500f A200FF
a293-113e0-9500f A200FF

Copy to clipboard

2023-12-04 Wind Slab

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

a23-203e11501-20310f 0000FF
a23-203e9501-11500f 0000FF

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Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2023-12-04 Avalanche Danger

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

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

Copy to clipboard

2023-12-04 Persistent Slab

• NW to E aspects (above 11501')
• NW to E aspects (9501' to 11500')

a293-113e11501-20310f A200FF
a293-113e9501-11500f A200FF

Copy to clipboard

2023-12-04 Storm Slab

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

a113-113e11501-20310f 0000FF
a203-203e9501-11500f 0000FF
a113-113e0-9500f 0000FF

Copy to clipboard

Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2023-12-04 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

2023-12-04 Persistent Slab

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

a293-113e11501-20310f A200FF
a293-113e9501-11500f A200FF
a293-113e0-9500f A200FF

Copy to clipboard

Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2023-12-04 Avalanche Danger

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

a0-0e11501-20310f f7941e
a0-0e9501-11500f f7941e
a0-0e0-9500f 50b848

Copy to clipboard

2023-12-04 Persistent Slab

• NW to E aspects (above 11501')
• NW to E aspects (9501' to 11500')

a293-113e11501-20310f A200FF
a293-113e9501-11500f A200FF

Copy to clipboard

Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

CAIC zone
Avalanche Report

2023-12-04 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

2023-12-04 Persistent Slab

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

a293-113e11501-20310f A200FF
a293-113e9501-11500f A200FF
a293-113e0-9500f A200FF

Copy to clipboard

Issued at: Sunday, December 03, 2023 4:30PM
Issued by: CAIC

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:20AM Shade	120 by 1 Copy to clipboard
2023-12-04 08:50AM Shade	136 by 15 Copy to clipboard
2023-12-04 10:20AM Shade	156 by 24 Copy to clipboard
2023-12-04 11:50AM Shade	178 by 28 Copy to clipboard
2023-12-04 01:20PM Shade	202 by 25 Copy to clipboard
2023-12-04 02:50PM Shade	222 by 16 Copy to clipboard
2023-12-04 04:20PM Shade	238 by 3 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:20AM Shade	120 by 1 Copy to clipboard
2023-12-04 08:50AM Shade	136 by 15 Copy to clipboard
2023-12-04 10:20AM Shade	155 by 25 Copy to clipboard
2023-12-04 11:50AM Shade	178 by 29 Copy to clipboard
2023-12-04 01:20PM Shade	201 by 26 Copy to clipboard
2023-12-04 02:50PM Shade	221 by 17 Copy to clipboard
2023-12-04 04:20PM Shade	238 by 3 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:30AM Shade	122 by 2 Copy to clipboard
2023-12-04 09:00AM Shade	138 by 15 Copy to clipboard
2023-12-04 10:30AM Shade	158 by 24 Copy to clipboard
2023-12-04 12:00PM Shade	181 by 27 Copy to clipboard
2023-12-04 01:30PM Shade	203 by 23 Copy to clipboard
2023-12-04 03:00PM Shade	223 by 14 Copy to clipboard
2023-12-04 04:30PM Shade	239 by 1 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:20AM Shade	120 by 1 Copy to clipboard
2023-12-04 08:50AM Shade	135 by 14 Copy to clipboard
2023-12-04 10:20AM Shade	155 by 25 Copy to clipboard
2023-12-04 11:50AM Shade	178 by 29 Copy to clipboard
2023-12-04 01:20PM Shade	201 by 26 Copy to clipboard
2023-12-04 02:50PM Shade	221 by 17 Copy to clipboard
2023-12-04 04:20PM Shade	237 by 4 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:10AM Shade	119 by 1 Copy to clipboard
2023-12-04 08:40AM Shade	135 by 15 Copy to clipboard
2023-12-04 10:10AM Shade	154 by 25 Copy to clipboard
2023-12-04 11:40AM Shade	177 by 30 Copy to clipboard
2023-12-04 01:10PM Shade	200 by 27 Copy to clipboard
2023-12-04 02:40PM Shade	221 by 18 Copy to clipboard
2023-12-04 04:10PM Shade	237 by 5 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:20AM Shade	120 by 1 Copy to clipboard
2023-12-04 08:50AM Shade	136 by 15 Copy to clipboard
2023-12-04 10:20AM Shade	156 by 25 Copy to clipboard
2023-12-04 11:50AM Shade	179 by 29 Copy to clipboard
2023-12-04 01:20PM Shade	202 by 25 Copy to clipboard
2023-12-04 02:50PM Shade	222 by 16 Copy to clipboard
2023-12-04 04:20PM Shade	238 by 3 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:20AM Shade	121 by 1 Copy to clipboard
2023-12-04 08:50AM Shade	137 by 14 Copy to clipboard
2023-12-04 10:20AM Shade	156 by 24 Copy to clipboard
2023-12-04 11:50AM Shade	179 by 27 Copy to clipboard
2023-12-04 01:20PM Shade	202 by 24 Copy to clipboard
2023-12-04 02:50PM Shade	222 by 15 Copy to clipboard
2023-12-04 04:20PM Shade	238 by 2 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:30AM Shade	121 by 2 Copy to clipboard
2023-12-04 09:00AM Shade	137 by 15 Copy to clipboard
2023-12-04 10:30AM Shade	157 by 24 Copy to clipboard
2023-12-04 12:00PM Shade	180 by 28 Copy to clipboard
2023-12-04 01:30PM Shade	203 by 24 Copy to clipboard
2023-12-04 03:00PM Shade	223 by 15 Copy to clipboard
2023-12-04 04:30PM Shade	239 by 2 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:20AM Shade	120 by 1 Copy to clipboard
2023-12-04 08:50AM Shade	136 by 15 Copy to clipboard
2023-12-04 10:20AM Shade	155 by 25 Copy to clipboard
2023-12-04 11:50AM Shade	178 by 29 Copy to clipboard
2023-12-04 01:20PM Shade	201 by 26 Copy to clipboard
2023-12-04 02:50PM Shade	221 by 17 Copy to clipboard
2023-12-04 04:20PM Shade	238 by 3 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:20AM Shade	120 by 1 Copy to clipboard
2023-12-04 08:50AM Shade	135 by 16 Copy to clipboard
2023-12-04 10:20AM Shade	154 by 26 Copy to clipboard
2023-12-04 11:50AM Shade	178 by 30 Copy to clipboard
2023-12-04 01:20PM Shade	201 by 27 Copy to clipboard
2023-12-04 02:50PM Shade	221 by 18 Copy to clipboard
2023-12-04 04:20PM Shade	237 by 4 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-12-04 07:20AM Shade	119 by 1 Copy to clipboard
2023-12-04 08:50AM Shade	135 by 15 Copy to clipboard
2023-12-04 10:20AM Shade	154 by 25 Copy to clipboard
2023-12-04 11:50AM Shade	177 by 30 Copy to clipboard
2023-12-04 01:20PM Shade	200 by 27 Copy to clipboard
2023-12-04 02:50PM Shade	221 by 18 Copy to clipboard
2023-12-04 04:20PM Shade	237 by 4 Copy to clipboard

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