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 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

East Slopes Central
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 30, 2023 6:27PM
Issued by: NWAC

East Slopes North
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 30, 2023 6:27PM
Issued by: NWAC

East Slopes South
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 30, 2023 6:27PM
Issued by: NWAC

Olympics
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 30, 2023 6:27PM
Issued by: NWAC

Snoqualmie Pass
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 30, 2023 6:27PM
Issued by: NWAC

Stevens Pass
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 30, 2023 6:27PM
Issued by: NWAC

West Slopes Central
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 30, 2023 6:27PM
Issued by: NWAC

West Slopes North
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 30, 2023 6:27PM
Issued by: NWAC

West Slopes South
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, April 30, 2023 6:27PM
Issued by: NWAC

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-01 06:00AM Shade	69 by 1 Copy to clipboard
2023-05-01 07:30AM Shade	85 by 16 Copy to clipboard
2023-05-01 09:00AM Shade	102 by 31 Copy to clipboard
2023-05-01 10:30AM Shade	124 by 45 Copy to clipboard
2023-05-01 12:00PM Shade	154 by 55 Copy to clipboard
2023-05-01 01:30PM Shade	193 by 57 Copy to clipboard
2023-05-01 03:00PM Shade	228 by 49 Copy to clipboard
2023-05-01 04:30PM Shade	251 by 36 Copy to clipboard
2023-05-01 06:00PM Shade	270 by 21 Copy to clipboard
2023-05-01 07:30PM Shade	286 by 6 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-01 06:00AM Shade	69 by 2 Copy to clipboard
2023-05-01 07:30AM Shade	86 by 16 Copy to clipboard
2023-05-01 09:00AM Shade	103 by 31 Copy to clipboard
2023-05-01 10:30AM Shade	125 by 45 Copy to clipboard
2023-05-01 12:00PM Shade	155 by 55 Copy to clipboard
2023-05-01 01:30PM Shade	194 by 56 Copy to clipboard
2023-05-01 03:00PM Shade	227 by 48 Copy to clipboard
2023-05-01 04:30PM Shade	251 by 36 Copy to clipboard
2023-05-01 06:00PM Shade	269 by 21 Copy to clipboard
2023-05-01 07:30PM Shade	286 by 6 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-01 06:00AM Shade	69 by 1 Copy to clipboard
2023-05-01 07:30AM Shade	84 by 16 Copy to clipboard
2023-05-01 09:00AM Shade	101 by 31 Copy to clipboard
2023-05-01 10:30AM Shade	122 by 45 Copy to clipboard
2023-05-01 12:00PM Shade	153 by 56 Copy to clipboard
2023-05-01 01:30PM Shade	193 by 58 Copy to clipboard
2023-05-01 03:00PM Shade	228 by 50 Copy to clipboard
2023-05-01 04:30PM Shade	252 by 37 Copy to clipboard
2023-05-01 06:00PM Shade	270 by 22 Copy to clipboard
2023-05-01 07:30PM Shade	286 by 6 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-01 06:10AM Shade	69 by 1 Copy to clipboard
2023-05-01 07:40AM Shade	85 by 16 Copy to clipboard
2023-05-01 09:10AM Shade	102 by 31 Copy to clipboard
2023-05-01 10:40AM Shade	123 by 45 Copy to clipboard
2023-05-01 12:10PM Shade	154 by 55 Copy to clipboard
2023-05-01 01:40PM Shade	193 by 57 Copy to clipboard
2023-05-01 03:10PM Shade	227 by 49 Copy to clipboard
2023-05-01 04:40PM Shade	251 by 36 Copy to clipboard
2023-05-01 06:10PM Shade	269 by 21 Copy to clipboard
2023-05-01 07:40PM Shade	286 by 6 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-01 06:00AM Shade	68 by 1 Copy to clipboard
2023-05-01 07:30AM Shade	84 by 16 Copy to clipboard
2023-05-01 09:00AM Shade	101 by 31 Copy to clipboard
2023-05-01 10:30AM Shade	123 by 45 Copy to clipboard
2023-05-01 12:00PM Shade	153 by 55 Copy to clipboard
2023-05-01 01:30PM Shade	192 by 57 Copy to clipboard
2023-05-01 03:00PM Shade	227 by 50 Copy to clipboard
2023-05-01 04:30PM Shade	251 by 37 Copy to clipboard
2023-05-01 06:00PM Shade	269 by 22 Copy to clipboard
2023-05-01 07:30PM Shade	285 by 7 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-01 06:00AM Shade	69 by 1 Copy to clipboard
2023-05-01 07:30AM Shade	85 by 16 Copy to clipboard
2023-05-01 09:00AM Shade	102 by 31 Copy to clipboard
2023-05-01 10:30AM Shade	123 by 45 Copy to clipboard
2023-05-01 12:00PM Shade	153 by 55 Copy to clipboard
2023-05-01 01:30PM Shade	193 by 57 Copy to clipboard
2023-05-01 03:00PM Shade	227 by 49 Copy to clipboard
2023-05-01 04:30PM Shade	251 by 36 Copy to clipboard
2023-05-01 06:00PM Shade	269 by 21 Copy to clipboard
2023-05-01 07:30PM Shade	286 by 7 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-01 06:00AM Shade	68 by 1 Copy to clipboard
2023-05-01 07:30AM Shade	85 by 16 Copy to clipboard
2023-05-01 09:00AM Shade	102 by 31 Copy to clipboard
2023-05-01 10:30AM Shade	123 by 45 Copy to clipboard
2023-05-01 12:00PM Shade	153 by 55 Copy to clipboard
2023-05-01 01:30PM Shade	192 by 57 Copy to clipboard
2023-05-01 03:00PM Shade	226 by 49 Copy to clipboard
2023-05-01 04:30PM Shade	251 by 36 Copy to clipboard
2023-05-01 06:00PM Shade	269 by 22 Copy to clipboard
2023-05-01 07:30PM Shade	285 by 7 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-01 06:00AM Shade	68 by 1 Copy to clipboard
2023-05-01 07:30AM Shade	85 by 16 Copy to clipboard
2023-05-01 09:00AM Shade	102 by 30 Copy to clipboard
2023-05-01 10:30AM Shade	124 by 44 Copy to clipboard
2023-05-01 12:00PM Shade	153 by 54 Copy to clipboard
2023-05-01 01:30PM Shade	192 by 56 Copy to clipboard
2023-05-01 03:00PM Shade	226 by 49 Copy to clipboard
2023-05-01 04:30PM Shade	250 by 36 Copy to clipboard
2023-05-01 06:00PM Shade	269 by 22 Copy to clipboard
2023-05-01 07:30PM Shade	285 by 7 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-01 06:10AM Shade	70 by 2 Copy to clipboard
2023-05-01 07:40AM Shade	86 by 17 Copy to clipboard
2023-05-01 09:10AM Shade	103 by 32 Copy to clipboard
2023-05-01 10:40AM Shade	124 by 47 Copy to clipboard
2023-05-01 12:10PM Shade	156 by 57 Copy to clipboard
2023-05-01 01:40PM Shade	196 by 58 Copy to clipboard
2023-05-01 03:10PM Shade	230 by 49 Copy to clipboard
2023-05-01 04:40PM Shade	254 by 36 Copy to clipboard
2023-05-01 06:10PM Shade	271 by 20 Copy to clipboard
2023-05-01 07:40PM Shade	287 by 5 Copy to clipboard

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