Washington 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: East Slopes Central East Slopes North East Slopes South Olympics Olympics Snoqualmie Pass Stevens Pass West Slopes Central West Slopes North West Slopes South

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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

Pre-populated CalTopo Map

Download Zone Shape

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East Slopes Central
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 14, 2024 6:30PM
Issued by: NWAC

East Slopes North
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 14, 2024 6:30PM
Issued by: NWAC

East Slopes South
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 14, 2024 6:30PM
Issued by: NWAC

Olympics
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 14, 2024 6:30PM
Issued by: NWAC

Olympics
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 14, 2024 6:30PM
Issued by: NWAC

Snoqualmie Pass
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 14, 2024 6:30PM
Issued by: NWAC

Stevens Pass
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 14, 2024 6:30PM
Issued by: NWAC

West Slopes Central
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 14, 2024 6:30PM
Issued by: NWAC

West Slopes North
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 14, 2024 6:30PM
Issued by: NWAC

West Slopes South
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 14, 2024 6:30PM
Issued by: NWAC

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-15 06:30AM Shade	77 by 2 Copy to clipboard
2024-04-15 08:00AM Shade	94 by 17 Copy to clipboard
2024-04-15 09:30AM Shade	112 by 32 Copy to clipboard
2024-04-15 11:00AM Shade	135 by 44 Copy to clipboard
2024-04-15 12:30PM Shade	167 by 52 Copy to clipboard
2024-04-15 02:00PM Shade	203 by 51 Copy to clipboard
2024-04-15 03:30PM Shade	232 by 41 Copy to clipboard
2024-04-15 05:00PM Shade	254 by 28 Copy to clipboard
2024-04-15 06:30PM Shade	271 by 13 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-15 06:20AM Shade	76 by 1 Copy to clipboard
2024-04-15 07:50AM Shade	92 by 16 Copy to clipboard
2024-04-15 09:20AM Shade	111 by 30 Copy to clipboard
2024-04-15 10:50AM Shade	133 by 43 Copy to clipboard
2024-04-15 12:20PM Shade	164 by 51 Copy to clipboard
2024-04-15 01:50PM Shade	199 by 50 Copy to clipboard
2024-04-15 03:20PM Shade	229 by 42 Copy to clipboard
2024-04-15 04:50PM Shade	251 by 29 Copy to clipboard
2024-04-15 06:20PM Shade	269 by 14 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-15 06:30AM Shade	77 by 1 Copy to clipboard
2024-04-15 08:00AM Shade	93 by 17 Copy to clipboard
2024-04-15 09:30AM Shade	111 by 32 Copy to clipboard
2024-04-15 11:00AM Shade	134 by 45 Copy to clipboard
2024-04-15 12:30PM Shade	166 by 53 Copy to clipboard
2024-04-15 02:00PM Shade	202 by 52 Copy to clipboard
2024-04-15 03:30PM Shade	232 by 42 Copy to clipboard
2024-04-15 05:00PM Shade	254 by 29 Copy to clipboard
2024-04-15 06:30PM Shade	271 by 13 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-15 06:40AM Shade	77 by 2 Copy to clipboard
2024-04-15 08:10AM Shade	94 by 17 Copy to clipboard
2024-04-15 09:40AM Shade	112 by 32 Copy to clipboard
2024-04-15 11:10AM Shade	135 by 44 Copy to clipboard
2024-04-15 12:40PM Shade	167 by 52 Copy to clipboard
2024-04-15 02:10PM Shade	202 by 51 Copy to clipboard
2024-04-15 03:40PM Shade	232 by 41 Copy to clipboard
2024-04-15 05:10PM Shade	253 by 28 Copy to clipboard
2024-04-15 06:40PM Shade	271 by 13 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-15 06:40AM Shade	77 by 2 Copy to clipboard
2024-04-15 08:10AM Shade	94 by 17 Copy to clipboard
2024-04-15 09:40AM Shade	112 by 32 Copy to clipboard
2024-04-15 11:10AM Shade	135 by 44 Copy to clipboard
2024-04-15 12:40PM Shade	167 by 52 Copy to clipboard
2024-04-15 02:10PM Shade	202 by 51 Copy to clipboard
2024-04-15 03:40PM Shade	232 by 41 Copy to clipboard
2024-04-15 05:10PM Shade	253 by 28 Copy to clipboard
2024-04-15 06:40PM Shade	271 by 13 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-15 06:30AM Shade	77 by 1 Copy to clipboard
2024-04-15 08:00AM Shade	93 by 17 Copy to clipboard
2024-04-15 09:30AM Shade	111 by 31 Copy to clipboard
2024-04-15 11:00AM Shade	134 by 44 Copy to clipboard
2024-04-15 12:30PM Shade	166 by 52 Copy to clipboard
2024-04-15 02:00PM Shade	202 by 51 Copy to clipboard
2024-04-15 03:30PM Shade	231 by 42 Copy to clipboard
2024-04-15 05:00PM Shade	253 by 29 Copy to clipboard
2024-04-15 06:30PM Shade	270 by 14 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-15 06:30AM Shade	77 by 2 Copy to clipboard
2024-04-15 08:00AM Shade	93 by 17 Copy to clipboard
2024-04-15 09:30AM Shade	112 by 32 Copy to clipboard
2024-04-15 11:00AM Shade	135 by 44 Copy to clipboard
2024-04-15 12:30PM Shade	166 by 52 Copy to clipboard
2024-04-15 02:00PM Shade	202 by 51 Copy to clipboard
2024-04-15 03:30PM Shade	231 by 42 Copy to clipboard
2024-04-15 05:00PM Shade	253 by 28 Copy to clipboard
2024-04-15 06:30PM Shade	271 by 13 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-15 06:30AM Shade	77 by 2 Copy to clipboard
2024-04-15 08:00AM Shade	93 by 17 Copy to clipboard
2024-04-15 09:30AM Shade	112 by 31 Copy to clipboard
2024-04-15 11:00AM Shade	135 by 44 Copy to clipboard
2024-04-15 12:30PM Shade	166 by 51 Copy to clipboard
2024-04-15 02:00PM Shade	201 by 50 Copy to clipboard
2024-04-15 03:30PM Shade	231 by 42 Copy to clipboard
2024-04-15 05:00PM Shade	253 by 28 Copy to clipboard
2024-04-15 06:30PM Shade	270 by 13 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-15 06:30AM Shade	77 by 2 Copy to clipboard
2024-04-15 08:00AM Shade	93 by 16 Copy to clipboard
2024-04-15 09:30AM Shade	112 by 31 Copy to clipboard
2024-04-15 11:00AM Shade	135 by 43 Copy to clipboard
2024-04-15 12:30PM Shade	166 by 51 Copy to clipboard
2024-04-15 02:00PM Shade	201 by 50 Copy to clipboard
2024-04-15 03:30PM Shade	230 by 41 Copy to clipboard
2024-04-15 05:00PM Shade	252 by 28 Copy to clipboard
2024-04-15 06:30PM Shade	270 by 14 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-04-15 06:30AM Shade	76 by 1 Copy to clipboard
2024-04-15 08:00AM Shade	93 by 16 Copy to clipboard
2024-04-15 09:30AM Shade	110 by 32 Copy to clipboard
2024-04-15 11:00AM Shade	133 by 45 Copy to clipboard
2024-04-15 12:30PM Shade	165 by 53 Copy to clipboard
2024-04-15 02:00PM Shade	202 by 52 Copy to clipboard
2024-04-15 03:30PM Shade	232 by 43 Copy to clipboard
2024-04-15 05:00PM Shade	253 by 29 Copy to clipboard
2024-04-15 06:30PM Shade	270 by 14 Copy to clipboard

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