Avalanche sheet Beta
The forecast, on the terrain
The avalanche center's forecast, drawn onto the slopes it is talking about.
This page is a summary. Read the forecast:
- 1Color is the danger rating
Each slope takes the rating the forecast gives its elevation band: below, near or above treeline.
- 2Strong color is steep ground
Slopes of 30° and steeper are solid. Pick a problem to see only the aspects and elevations it is on.
- 3Tap any slope
You get its elevation, the way it faces, its angle, and which forecast problems apply there.
Sources
- avalanche.org and the forecasting avalanche centerDanger ratings, avalanche problems, zone boundaries and the forecaster's words
- Terrain Tiles (Mapzen, hosted by AWS Open Data)The elevation model that slope angle, aspect and elevation are computed from
- OpenStreetMap contributors, via OpenFreeMapPeaks, lakes, roads, trails and place names
* Below, near and above treeline are drawn at approximate elevations chosen by this page; avalanche centers define them by the trees. Slope angle is computed at about 100 ft per pixel, so small terrain features do not show.
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