Idaho 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: Selkirks & Cabinets St. Regis & Silver Valley PAC Advisory Area Banner Summit Galena Summit & Eastern Mtns Sawtooth & Western Smoky Mtns Soldier & Wood River Valley Mtns

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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

Selkirks & Cabinets
Avalanche Report

Report not available. See IPAC for more information.

Issued at: Monday, April 03, 2023 5:59AM
Issued by: IPAC

St. Regis & Silver Valley
Avalanche Report

Report not available. See IPAC for more information.

Issued at: Monday, April 03, 2023 5:59AM
Issued by: IPAC

PAC Advisory Area
Avalanche Report

Report not available. See PAC for more information.

Issued at: Saturday, April 22, 2023 7:59AM
Issued by: PAC

Banner Summit
Avalanche Report

Report not available. See SNFAC for more information.

Issued at: Monday, May 01, 2023 4:49PM
Issued by: SNFAC

Galena Summit & Eastern Mtns
Avalanche Report

Report not available. See SNFAC for more information.

Issued at: Monday, May 01, 2023 4:49PM
Issued by: SNFAC

Sawtooth & Western Smoky Mtns
Avalanche Report

Report not available. See SNFAC for more information.

Issued at: Monday, May 01, 2023 4:49PM
Issued by: SNFAC

Soldier & Wood River Valley Mtns
Avalanche Report

Report not available. See SNFAC for more information.

Issued at: Monday, May 01, 2023 4:49PM
Issued by: SNFAC

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-04 06:30AM Shade	83 by 1 Copy to clipboard
2023-04-04 08:00AM Shade	100 by 16 Copy to clipboard
2023-04-04 09:30AM Shade	119 by 30 Copy to clipboard
2023-04-04 11:00AM Shade	143 by 42 Copy to clipboard
2023-04-04 12:30PM Shade	174 by 47 Copy to clipboard
2023-04-04 02:00PM Shade	206 by 45 Copy to clipboard
2023-04-04 03:30PM Shade	232 by 35 Copy to clipboard
2023-04-04 05:00PM Shade	253 by 22 Copy to clipboard
2023-04-04 06:30PM Shade	271 by 7 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-04 06:30AM Shade	83 by 1 Copy to clipboard
2023-04-04 08:00AM Shade	100 by 17 Copy to clipboard
2023-04-04 09:30AM Shade	119 by 31 Copy to clipboard
2023-04-04 11:00AM Shade	143 by 42 Copy to clipboard
2023-04-04 12:30PM Shade	174 by 48 Copy to clipboard
2023-04-04 02:00PM Shade	206 by 45 Copy to clipboard
2023-04-04 03:30PM Shade	233 by 36 Copy to clipboard
2023-04-04 05:00PM Shade	254 by 22 Copy to clipboard
2023-04-04 06:30PM Shade	271 by 7 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-23 07:00AM Shade	74 by 1 Copy to clipboard
2023-04-23 08:30AM Shade	89 by 17 Copy to clipboard
2023-04-23 10:00AM Shade	106 by 33 Copy to clipboard
2023-04-23 11:30AM Shade	128 by 47 Copy to clipboard
2023-04-23 01:00PM Shade	161 by 57 Copy to clipboard
2023-04-23 02:30PM Shade	201 by 56 Copy to clipboard
2023-04-23 04:00PM Shade	233 by 47 Copy to clipboard
2023-04-23 05:30PM Shade	255 by 32 Copy to clipboard
2023-04-23 07:00PM Shade	272 by 17 Copy to clipboard
2023-04-23 08:30PM Shade	287 by 1 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-02 06:40AM Shade	69 by 1 Copy to clipboard
2023-05-02 08:10AM Shade	84 by 16 Copy to clipboard
2023-05-02 09:40AM Shade	100 by 32 Copy to clipboard
2023-05-02 11:10AM Shade	121 by 47 Copy to clipboard
2023-05-02 12:40PM Shade	152 by 59 Copy to clipboard
2023-05-02 02:10PM Shade	196 by 60 Copy to clipboard
2023-05-02 03:40PM Shade	231 by 51 Copy to clipboard
2023-05-02 05:10PM Shade	254 by 37 Copy to clipboard
2023-05-02 06:40PM Shade	271 by 21 Copy to clipboard
2023-05-02 08:10PM Shade	287 by 5 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-02 06:40AM Shade	69 by 1 Copy to clipboard
2023-05-02 08:10AM Shade	85 by 17 Copy to clipboard
2023-05-02 09:40AM Shade	101 by 33 Copy to clipboard
2023-05-02 11:10AM Shade	121 by 48 Copy to clipboard
2023-05-02 12:40PM Shade	153 by 59 Copy to clipboard
2023-05-02 02:10PM Shade	197 by 61 Copy to clipboard
2023-05-02 03:40PM Shade	233 by 51 Copy to clipboard
2023-05-02 05:10PM Shade	255 by 37 Copy to clipboard
2023-05-02 06:40PM Shade	272 by 21 Copy to clipboard
2023-05-02 08:10PM Shade	287 by 5 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-02 06:40AM Shade	69 by 1 Copy to clipboard
2023-05-02 08:10AM Shade	84 by 17 Copy to clipboard
2023-05-02 09:40AM Shade	100 by 33 Copy to clipboard
2023-05-02 11:10AM Shade	121 by 48 Copy to clipboard
2023-05-02 12:40PM Shade	153 by 59 Copy to clipboard
2023-05-02 02:10PM Shade	196 by 61 Copy to clipboard
2023-05-02 03:40PM Shade	232 by 51 Copy to clipboard
2023-05-02 05:10PM Shade	255 by 37 Copy to clipboard
2023-05-02 06:40PM Shade	272 by 21 Copy to clipboard
2023-05-02 08:10PM Shade	287 by 5 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-05-02 06:40AM Shade	70 by 1 Copy to clipboard
2023-05-02 08:10AM Shade	85 by 17 Copy to clipboard
2023-05-02 09:40AM Shade	100 by 33 Copy to clipboard
2023-05-02 11:10AM Shade	121 by 48 Copy to clipboard
2023-05-02 12:40PM Shade	153 by 60 Copy to clipboard
2023-05-02 02:10PM Shade	198 by 61 Copy to clipboard
2023-05-02 03:40PM Shade	233 by 51 Copy to clipboard
2023-05-02 05:10PM Shade	256 by 37 Copy to clipboard
2023-05-02 06:40PM Shade	272 by 20 Copy to clipboard
2023-05-02 08:10PM Shade	287 by 4 Copy to clipboard

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