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

Avalanche Report

Pre-populated CalTopo Map

2024-12-21 Avalanche Danger

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• Moderate danger (above 4851')
• Moderate danger (3901' to 4850')
• Low danger (below 3900')

2024-12-21 Wind Slab

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• All aspects (above 4851')
• All aspects (3901' to 4850')

Issued at: Friday, December 20, 2024 6:00PM
Issued by: NWAC

Avalanche Report

Pre-populated CalTopo Map

2024-12-21 Avalanche Danger

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• Moderate danger (above 4851')
• Moderate danger (3901' to 4850')
• Moderate danger (below 3900')

2024-12-21 Wind Slab

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• All aspects (above 4851')
• All aspects (3901' to 4850')

2024-12-21 Storm Slab

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• All aspects (3901' to 4850')
• All aspects (below 3900')

Issued at: Friday, December 20, 2024 6:22PM
Issued by: NWAC

Avalanche Report

Pre-populated CalTopo Map

2024-12-21 Avalanche Danger

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• Moderate danger (above 4851')
• Low danger (3901' to 4850')
• Low danger (below 3900')

2024-12-21 Wind Slab

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• All aspects (above 4851')
• All aspects (3901' to 4850')

Issued at: Friday, December 20, 2024 6:00PM
Issued by: NWAC

Avalanche Report

Pre-populated CalTopo Map

2024-12-21 Avalanche Danger

Copy to clipboard

• Moderate danger (above 4851')
• Moderate danger (3901' to 4850')
• Low danger (below 3900')

2024-12-21 Wind Slab

Copy to clipboard

• All aspects (above 4851')
• All aspects (3901' to 4850')

2024-12-21 Glide Avalanches

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• All aspects (above 4851')
• All aspects (3901' to 4850')
• All aspects (below 3900')

Issued at: Friday, December 20, 2024 6:00PM
Issued by: NWAC

Avalanche Report

Pre-populated CalTopo Map

2024-12-21 Avalanche Danger

Copy to clipboard

• Moderate danger (above 4851')
• Moderate danger (3901' to 4850')
• Moderate danger (below 3900')

2024-12-21 Glide Avalanches

Copy to clipboard

• All aspects (above 4851')
• All aspects (3901' to 4850')
• All aspects (below 3900')

Issued at: Friday, December 20, 2024 6:00PM
Issued by: NWAC

Avalanche Report

Pre-populated CalTopo Map

2024-12-21 Avalanche Danger

Copy to clipboard

• Moderate danger (above 4851')
• Low danger (3901' to 4850')
• Low danger (below 3900')

2024-12-21 Wind Slab

Copy to clipboard

• All aspects (above 4851')

Issued at: Friday, December 20, 2024 6:00PM
Issued by: NWAC

Avalanche Report

Pre-populated CalTopo Map

2024-12-21 Avalanche Danger

Copy to clipboard

• Moderate danger (above 4851')
• Moderate danger (3901' to 4850')
• Low danger (below 3900')

2024-12-21 Glide Avalanches

Copy to clipboard

• All aspects (above 4851')
• All aspects (3901' to 4850')
• All aspects (below 3900')

Issued at: Friday, December 20, 2024 6:00PM
Issued by: NWAC

Avalanche Report

Pre-populated CalTopo Map

2024-12-21 Avalanche Danger

Copy to clipboard

• Moderate danger (above 4851')
• Moderate danger (3901' to 4850')
• Moderate danger (below 3900')

2024-12-21 Glide Avalanches

Copy to clipboard

• All aspects (above 4851')
• All aspects (3901' to 4850')
• All aspects (below 3900')

2024-12-21 Wind Slab

Copy to clipboard

• All aspects (above 4851')
• All aspects (3901' to 4850')

Issued at: Friday, December 20, 2024 6:00PM
Issued by: NWAC

Avalanche Report

Pre-populated CalTopo Map

2024-12-21 Avalanche Danger

Copy to clipboard

• Moderate danger (above 4851')
• Moderate danger (3901' to 4850')
• Moderate danger (below 3900')

2024-12-21 Glide Avalanches

Copy to clipboard

• All aspects (above 4851')
• All aspects (3901' to 4850')
• All aspects (below 3900')

Issued at: Friday, December 20, 2024 6:00PM
Issued by: NWAC

Zone

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