Canada 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: Canada zone Canada zone Canada zone Canada zone Canada zone Canada zone Canada zone Canada zone Canada zone Canada zone Canada zone Canada zone Canada zone Canada zone

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Pre-populated CalTopo Map

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Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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Issued at: Sunday, April 28, 2024 4:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• High danger (9001' to 10500')
• High danger (7501' to 9000')
• High danger (below 7500')

a0-0e9001-10500f ed1c24
a0-0e7501-9000f ed1c24
a0-0e6000-7500f ed1c24

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2024-05-08 Wet Slab

• All aspects (9001' to 10500')
• All aspects (7501' to 9000')
• All aspects (below 7500')

a203-203e9001-10500f A200FF
a203-203e7501-9000f A200FF
a203-203e6000-7500f A200FF

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2024-05-08 Cornice

• NW to SE aspects (9001' to 10500')

a293-158e9001-10500f 0000FF

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2024-05-08 Deep Persistent Slab

• NW to E aspects (9001' to 10500')

a293-113e9001-10500f 009AFF

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Issued at: Tuesday, May 07, 2024 4:45PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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2024-05-09 Deep Persistent Slab

• All aspects (below 7500')
• All aspects (7501' to 9000')
• All aspects (9001' to 10500')

a68-68e6000-7500f A200FF
a68-68e7501-9000f A200FF
a68-68e9001-10500f A200FF

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Issued at: Wednesday, May 08, 2024 4:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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Issued at: Sunday, April 28, 2024 4:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• No forecast (9001' to 10500')
• No forecast (7501' to 9000')
• No forecast (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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Issued at: Sunday, March 19, 2023 6:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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Issued at: Saturday, May 11, 2024 5:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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Issued at: Thursday, April 25, 2024 5:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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Issued at: Sunday, April 28, 2024 4:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• No forecast (9001' to 10500')
• No forecast (7501' to 9000')
• No forecast (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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Issued at: Sunday, March 19, 2023 6:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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2024-05-10 Deep Persistent Slab

• All aspects (7501' to 9000')
• All aspects (below 7500')
• All aspects (9001' to 10500')

a23-23e7501-9000f A200FF
a23-23e6000-7500f A200FF
a23-23e9001-10500f A200FF

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Issued at: Thursday, May 09, 2024 5:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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Issued at: Tuesday, April 09, 2024 4:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

Copy to clipboard

Issued at: Sunday, April 28, 2024 4:00PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

Copy to clipboard

Issued at: Wednesday, May 08, 2024 4:30PM
Issued by: Avalanche Canada

Canada zone
Avalanche Report

2024-04-09 Avalanche Danger

• Spring Conditions (9001' to 10500')
• Spring Conditions (7501' to 9000')
• Spring Conditions (below 7500')

a0-0e9001-10500f 939598
a0-0e7501-9000f 939598
a0-0e6000-7500f 939598

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Issued at: Monday, April 08, 2024 5:00PM
Issued by: Avalanche Canada

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-29 05:40AM Shade	67 by 1 Copy to clipboard
2024-04-29 07:10AM Shade	84 by 14 Copy to clipboard
2024-04-29 08:40AM Shade	102 by 28 Copy to clipboard
2024-04-29 10:10AM Shade	123 by 41 Copy to clipboard
2024-04-29 11:40AM Shade	151 by 50 Copy to clipboard
2024-04-29 01:10PM Shade	186 by 53 Copy to clipboard
2024-04-29 02:40PM Shade	219 by 47 Copy to clipboard
2024-04-29 04:10PM Shade	245 by 36 Copy to clipboard
2024-04-29 05:40PM Shade	265 by 23 Copy to clipboard
2024-04-29 07:10PM Shade	282 by 9 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-08 06:20AM Shade	64 by 2 Copy to clipboard
2024-05-08 07:50AM Shade	81 by 15 Copy to clipboard
2024-05-08 09:20AM Shade	99 by 30 Copy to clipboard
2024-05-08 10:50AM Shade	120 by 43 Copy to clipboard
2024-05-08 12:20PM Shade	148 by 53 Copy to clipboard
2024-05-08 01:50PM Shade	186 by 56 Copy to clipboard
2024-05-08 03:20PM Shade	221 by 51 Copy to clipboard
2024-05-08 04:50PM Shade	247 by 39 Copy to clipboard
2024-05-08 06:20PM Shade	267 by 26 Copy to clipboard
2024-05-08 07:50PM Shade	284 by 11 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-09 05:20AM Shade	62 by 1 Copy to clipboard
2024-05-09 06:50AM Shade	79 by 14 Copy to clipboard
2024-05-09 08:20AM Shade	97 by 28 Copy to clipboard
2024-05-09 09:50AM Shade	117 by 42 Copy to clipboard
2024-05-09 11:20AM Shade	145 by 52 Copy to clipboard
2024-05-09 12:50PM Shade	182 by 56 Copy to clipboard
2024-05-09 02:20PM Shade	218 by 52 Copy to clipboard
2024-05-09 03:50PM Shade	244 by 41 Copy to clipboard
2024-05-09 05:20PM Shade	265 by 27 Copy to clipboard
2024-05-09 06:50PM Shade	282 by 13 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-29 06:10AM Shade	65 by 1 Copy to clipboard
2024-04-29 07:40AM Shade	83 by 13 Copy to clipboard
2024-04-29 09:10AM Shade	102 by 26 Copy to clipboard
2024-04-29 10:40AM Shade	124 by 37 Copy to clipboard
2024-04-29 12:10PM Shade	150 by 46 Copy to clipboard
2024-04-29 01:40PM Shade	183 by 49 Copy to clipboard
2024-04-29 03:10PM Shade	214 by 45 Copy to clipboard
2024-04-29 04:40PM Shade	240 by 36 Copy to clipboard
2024-04-29 06:10PM Shade	261 by 24 Copy to clipboard
2024-04-29 07:40PM Shade	280 by 11 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-03-20 06:40AM Shade	92 by 2 Copy to clipboard
2023-03-20 08:10AM Shade	110 by 16 Copy to clipboard
2023-03-20 09:40AM Shade	130 by 29 Copy to clipboard
2023-03-20 11:10AM Shade	154 by 38 Copy to clipboard
2023-03-20 12:40PM Shade	183 by 41 Copy to clipboard
2023-03-20 02:10PM Shade	212 by 36 Copy to clipboard
2023-03-20 03:40PM Shade	235 by 26 Copy to clipboard
2023-03-20 05:10PM Shade	255 by 13 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-12 06:10AM Shade	61 by 1 Copy to clipboard
2024-05-12 07:40AM Shade	78 by 14 Copy to clipboard
2024-05-12 09:10AM Shade	95 by 28 Copy to clipboard
2024-05-12 10:40AM Shade	116 by 42 Copy to clipboard
2024-05-12 12:10PM Shade	143 by 52 Copy to clipboard
2024-05-12 01:40PM Shade	180 by 57 Copy to clipboard
2024-05-12 03:10PM Shade	216 by 53 Copy to clipboard
2024-05-12 04:40PM Shade	244 by 42 Copy to clipboard
2024-05-12 06:10PM Shade	264 by 28 Copy to clipboard
2024-05-12 07:40PM Shade	282 by 14 Copy to clipboard
2024-05-12 09:10PM Shade	299 by 1 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-26 06:40AM Shade	71 by 2 Copy to clipboard
2024-04-26 08:10AM Shade	88 by 16 Copy to clipboard
2024-04-26 09:40AM Shade	105 by 31 Copy to clipboard
2024-04-26 11:10AM Shade	128 by 44 Copy to clipboard
2024-04-26 12:40PM Shade	158 by 53 Copy to clipboard
2024-04-26 02:10PM Shade	195 by 54 Copy to clipboard
2024-04-26 03:40PM Shade	227 by 46 Copy to clipboard
2024-04-26 05:10PM Shade	251 by 34 Copy to clipboard
2024-04-26 06:40PM Shade	269 by 19 Copy to clipboard
2024-04-26 08:10PM Shade	286 by 5 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-29 06:10AM Shade	69 by 2 Copy to clipboard
2024-04-29 07:40AM Shade	86 by 16 Copy to clipboard
2024-04-29 09:10AM Shade	104 by 30 Copy to clipboard
2024-04-29 10:40AM Shade	125 by 43 Copy to clipboard
2024-04-29 12:10PM Shade	155 by 53 Copy to clipboard
2024-04-29 01:40PM Shade	192 by 54 Copy to clipboard
2024-04-29 03:10PM Shade	225 by 47 Copy to clipboard
2024-04-29 04:40PM Shade	249 by 35 Copy to clipboard
2024-04-29 06:10PM Shade	268 by 21 Copy to clipboard
2024-04-29 07:40PM Shade	285 by 7 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-03-20 06:40AM Shade	92 by 1 Copy to clipboard
2023-03-20 08:10AM Shade	109 by 16 Copy to clipboard
2023-03-20 09:40AM Shade	129 by 29 Copy to clipboard
2023-03-20 11:10AM Shade	154 by 38 Copy to clipboard
2023-03-20 12:40PM Shade	183 by 41 Copy to clipboard
2023-03-20 02:10PM Shade	211 by 36 Copy to clipboard
2023-03-20 03:40PM Shade	235 by 26 Copy to clipboard
2023-03-20 05:10PM Shade	254 by 13 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-10 06:20AM Shade	62 by 2 Copy to clipboard
2024-05-10 07:50AM Shade	80 by 15 Copy to clipboard
2024-05-10 09:20AM Shade	97 by 28 Copy to clipboard
2024-05-10 10:50AM Shade	118 by 41 Copy to clipboard
2024-05-10 12:20PM Shade	146 by 51 Copy to clipboard
2024-05-10 01:50PM Shade	181 by 55 Copy to clipboard
2024-05-10 03:20PM Shade	217 by 51 Copy to clipboard
2024-05-10 04:50PM Shade	244 by 40 Copy to clipboard
2024-05-10 06:20PM Shade	264 by 27 Copy to clipboard
2024-05-10 07:50PM Shade	282 by 14 Copy to clipboard
2024-05-10 09:20PM Shade	299 by 1 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-10 06:50AM Shade	79 by 1 Copy to clipboard
2024-04-10 08:20AM Shade	96 by 16 Copy to clipboard
2024-04-10 09:50AM Shade	115 by 30 Copy to clipboard
2024-04-10 11:20AM Shade	139 by 41 Copy to clipboard
2024-04-10 12:50PM Shade	169 by 48 Copy to clipboard
2024-04-10 02:20PM Shade	202 by 47 Copy to clipboard
2024-04-10 03:50PM Shade	230 by 38 Copy to clipboard
2024-04-10 05:20PM Shade	252 by 26 Copy to clipboard
2024-04-10 06:50PM Shade	270 by 11 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-29 06:20AM Shade	61 by 1 Copy to clipboard
2024-04-29 07:50AM Shade	80 by 12 Copy to clipboard
2024-04-29 09:20AM Shade	100 by 23 Copy to clipboard
2024-04-29 10:50AM Shade	122 by 33 Copy to clipboard
2024-04-29 12:20PM Shade	147 by 41 Copy to clipboard
2024-04-29 01:50PM Shade	177 by 45 Copy to clipboard
2024-04-29 03:20PM Shade	207 by 43 Copy to clipboard
2024-04-29 04:50PM Shade	233 by 35 Copy to clipboard
2024-04-29 06:20PM Shade	256 by 25 Copy to clipboard
2024-04-29 07:50PM Shade	276 by 14 Copy to clipboard
2024-04-29 09:20PM Shade	295 by 3 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-09 06:10AM Shade	62 by 1 Copy to clipboard
2024-05-09 07:40AM Shade	79 by 14 Copy to clipboard
2024-05-09 09:10AM Shade	97 by 28 Copy to clipboard
2024-05-09 10:40AM Shade	117 by 41 Copy to clipboard
2024-05-09 12:10PM Shade	145 by 52 Copy to clipboard
2024-05-09 01:40PM Shade	181 by 56 Copy to clipboard
2024-05-09 03:10PM Shade	217 by 52 Copy to clipboard
2024-05-09 04:40PM Shade	244 by 41 Copy to clipboard
2024-05-09 06:10PM Shade	264 by 27 Copy to clipboard
2024-05-09 07:40PM Shade	282 by 13 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-09 06:00AM Shade	80 by 2 Copy to clipboard
2024-04-09 07:30AM Shade	97 by 16 Copy to clipboard
2024-04-09 09:00AM Shade	116 by 31 Copy to clipboard
2024-04-09 10:30AM Shade	140 by 42 Copy to clipboard
2024-04-09 12:00PM Shade	170 by 49 Copy to clipboard
2024-04-09 01:30PM Shade	204 by 47 Copy to clipboard
2024-04-09 03:00PM Shade	231 by 38 Copy to clipboard
2024-04-09 04:30PM Shade	253 by 25 Copy to clipboard
2024-04-09 06:00PM Shade	270 by 10 Copy to clipboard

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Change Regions: California Wyoming Oregon Alaska Montana Idaho Arizona New Hampshire Washington New Mexico Utah Colorado Canada

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