New Hampshire 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.

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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: Presidential Range

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Pre-populated CalTopo Map

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Presidential Range
Avalanche Report

Report not available. See MWAC for more information.

Issued at: Friday, May 03, 2024 6:50AM
Issued by: MWAC

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-04 05:40AM Shade	68 by 1 Copy to clipboard
2024-05-04 07:10AM Shade	83 by 16 Copy to clipboard
2024-05-04 08:40AM Shade	99 by 32 Copy to clipboard
2024-05-04 10:10AM Shade	119 by 47 Copy to clipboard
2024-05-04 11:40AM Shade	150 by 59 Copy to clipboard
2024-05-04 01:10PM Shade	194 by 61 Copy to clipboard
2024-05-04 02:40PM Shade	231 by 53 Copy to clipboard
2024-05-04 04:10PM Shade	254 by 38 Copy to clipboard
2024-05-04 05:40PM Shade	271 by 22 Copy to clipboard
2024-05-04 07:10PM Shade	287 by 6 Copy to clipboard

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