New Hampshire Avalanche Maps

---

"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.

---

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.

---

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

Copy to clipboard

Pre-populated CalTopo Map

Presidential Range
Avalanche Report

2023-04-02 Avalanche Danger

• Considerable danger (above 5101')
• Considerable danger (3001' to 5100')
• Moderate danger (below 3000')

a0-0e5101-20310f f7941e
a0-0e3001-5100f f7941e
a0-0e0-3000f fff200

Copy to clipboard

2023-04-02 Wet Slab

• All aspects (above 5101')
• All aspects (3001' to 5100')

a158-158e5101-20310f A200FF
a158-158e3001-5100f A200FF

Copy to clipboard

2023-04-02 Wet Loose

• All aspects (below 3000')

a158-158e0-3000f 0000FF

Copy to clipboard

Issued at: Saturday, April 01, 2023 7:11AM
Issued by: MWAC

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-02 06:40AM Shade	85 by 2 Copy to clipboard
2023-04-02 08:10AM Shade	101 by 18 Copy to clipboard
2023-04-02 09:40AM Shade	119 by 33 Copy to clipboard
2023-04-02 11:10AM Shade	144 by 45 Copy to clipboard
2023-04-02 12:40PM Shade	177 by 51 Copy to clipboard
2023-04-02 02:10PM Shade	210 by 47 Copy to clipboard
2023-04-02 03:40PM Shade	237 by 36 Copy to clipboard
2023-04-02 05:10PM Shade	256 by 21 Copy to clipboard
2023-04-02 06:40PM Shade	272 by 5 Copy to clipboard

---

Change Regions: Alaska California Wyoming Oregon Montana Idaho Arizona New Hampshire Washington New Mexico Utah

If you enjoyed this or found it helpful, please consider buying an espresso to keep the flow going.

Show Known Issues