Wyoming 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

The selected elevation bands are not meant to be exact, but represent a characteristic of the terrain which varies locally.

The highest band, ATL (Above Tree Line), typically includes alpine areas beginning as the treeline transitions into open slopes extending to ridges and peaks.

The middle band, NTL (Near Tree Line), is typically a narrow transition zone between dense forests and treeless alpine areas.

The lowest band, BTL (Below Tree Line), typically extends from valley floors or snowline to near treeline.

Adjusting bands

The default elevation bands may not be accurate for the current zone, you can adjust the bands by dragging the sliders.

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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: Gros Ventre Salt River and Wyoming Ranges Snake River Range Southern Wyoming Range Tetons Togwotee Pass Big Horns Sierra Madre Snowy Range

Avalanche Report

Report not available. See BTAC for more information.

Avalanche Report

Pre-populated CalTopo Map

False Avalanche Danger

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• Moderate danger (above 9001')
• Moderate danger (7501' to 9000')
• Low danger (below 7500')

2025-01-21 Persistent Slab

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• All aspects (above 9001')
• W to E aspects (7501' to 9000')

Issued at: Monday, January 20, 2025 6:31AM
Issued by: BTAC

Avalanche Report

Pre-populated CalTopo Map

False Avalanche Danger

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• Moderate danger (above 9001')
• Moderate danger (7501' to 9000')
• Low danger (below 7500')

2025-01-21 Persistent Slab

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• W to E aspects (above 9001')
• W to E aspects (7501' to 9000')

Issued at: Monday, January 20, 2025 6:31AM
Issued by: BTAC

Avalanche Report

Report not available. See BTAC for more information.

Avalanche Report

Pre-populated CalTopo Map

False Avalanche Danger

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• Low danger (above 9001')
• Low danger (7501' to 9000')
• Low danger (below 7500')

Issued at: Monday, January 20, 2025 6:51AM
Issued by: BTAC

Avalanche Report

Pre-populated CalTopo Map

False Avalanche Danger

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• Moderate danger (above 9001')
• Low danger (7501' to 9000')
• No rating (below 7500')

2025-01-21 Persistent Slab

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• All aspects (above 9001')
• SW to SE aspects (7501' to 9000')

Issued at: Monday, January 20, 2025 7:15AM
Issued by: BTAC

Avalanche Report

Report not available. See EWYAIX for more information.

Avalanche Report

Report not available. See EWYAIX for more information.

Avalanche Report

Report not available. See EWYAIX for more information.

Zone

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