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: Tuesday, May 21, 2024 2:11PM
Issued by: MWAC

Sunlight Angles

Time of day	Lighting (Az/Z)
2024-05-22 05:20AM Shade	61 by 1 Copy to clipboard
2024-05-22 06:50AM Shade	76 by 16 Copy to clipboard
2024-05-22 08:20AM Shade	91 by 32 Copy to clipboard
2024-05-22 09:50AM Shade	110 by 47 Copy to clipboard
2024-05-22 11:20AM Shade	138 by 61 Copy to clipboard
2024-05-22 12:50PM Shade	185 by 66 Copy to clipboard
2024-05-22 02:20PM Shade	229 by 59 Copy to clipboard
2024-05-22 03:50PM Shade	254 by 45 Copy to clipboard
2024-05-22 05:20PM Shade	272 by 29 Copy to clipboard
2024-05-22 06:50PM Shade	286 by 13 Copy to clipboard

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