Washington Avalanche Map

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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: East Slopes Central East Slopes North East Slopes South Olympics Snoqualmie Pass Stevens Pass West Slopes Central West Slopes North West Slopes South

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East Slopes Central

Pre-populated CalTopo Map

East Slopes North

Pre-populated CalTopo Map

East Slopes South

Pre-populated CalTopo Map

Olympics

Pre-populated CalTopo Map

Snoqualmie Pass

Pre-populated CalTopo Map

Stevens Pass

Pre-populated CalTopo Map

West Slopes Central

Pre-populated CalTopo Map

West Slopes North

Pre-populated CalTopo Map

West Slopes South

Pre-populated CalTopo Map

Avalanche Report

2023-03-20 Avalanche Danger

• Moderate danger (above 4851')
• Moderate danger (3901' to 4850')
• Moderate danger (below 3900')

a0-0e4851-20310f fff200
a0-0e3901-4850f fff200
a0-0e0-3900f fff200

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2023-03-20 Storm Slab

• All aspects (above 4851')
• All aspects (3901' to 4850')
• All aspects (below 3900')

a158-158e4851-20310f A200FF
a158-158e3901-4850f A200FF
a158-158e0-3900f A200FF

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Issued at: Sunday, March 19, 2023 6:30PM
Issued by: NWAC

2023-03-20 Avalanche Danger

• Low danger (above 4851')
• Low danger (3901' to 4850')
• Low danger (below 3900')

a0-0e4851-20310f 50b848
a0-0e3901-4850f 50b848
a0-0e0-3900f 50b848

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Issued at: Sunday, March 19, 2023 6:30PM
Issued by: NWAC

2023-03-20 Avalanche Danger

• Moderate danger (above 4851')
• Low danger (3901' to 4850')
• Low danger (below 3900')

a0-0e4851-20310f fff200
a0-0e3901-4850f 50b848
a0-0e0-3900f 50b848

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2023-03-20 Wind Slab

• All aspects (above 4851')

a158-158e4851-20310f A200FF

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Issued at: Sunday, March 19, 2023 6:30PM
Issued by: NWAC

Report not available. See NWAC for more information.

Issued at: Sunday, March 19, 2023 6:30PM
Issued by: NWAC

2023-03-20 Avalanche Danger

• Moderate danger (above 4851')
• Moderate danger (3901' to 4850')
• Moderate danger (below 3900')

a0-0e4851-20310f fff200
a0-0e3901-4850f fff200
a0-0e0-3900f fff200

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2023-03-20 Wind Slab

• All aspects (above 4851')
• All aspects (3901' to 4850')

a158-158e4851-20310f A200FF
a158-158e3901-4850f A200FF

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2023-03-20 Wet Loose

• All aspects (below 3900')

a158-158e0-3900f 0000FF

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Issued at: Sunday, March 19, 2023 6:30PM
Issued by: NWAC

2023-03-20 Avalanche Danger

• Moderate danger (above 4851')
• Low danger (3901' to 4850')
• Low danger (below 3900')

a0-0e4851-20310f fff200
a0-0e3901-4850f 50b848
a0-0e0-3900f 50b848

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2023-03-20 Wind Slab

• All aspects (above 4851')

a158-158e4851-20310f A200FF

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Issued at: Sunday, March 19, 2023 6:30PM
Issued by: NWAC

2023-03-20 Avalanche Danger

• Moderate danger (above 4851')
• Low danger (3901' to 4850')
• Low danger (below 3900')

a0-0e4851-20310f fff200
a0-0e3901-4850f 50b848
a0-0e0-3900f 50b848

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2023-03-20 Wind Slab

• All aspects (above 4851')
• All aspects (3901' to 4850')

a158-158e4851-20310f A200FF
a158-158e3901-4850f A200FF

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Issued at: Sunday, March 19, 2023 6:30PM
Issued by: NWAC

2023-03-20 Avalanche Danger

• Moderate danger (above 4851')
• Low danger (3901' to 4850')
• Low danger (below 3900')

a0-0e4851-20310f fff200
a0-0e3901-4850f 50b848
a0-0e0-3900f 50b848

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2023-03-20 Wind Slab

• All aspects (above 4851')
• All aspects (3901' to 4850')

a158-158e4851-20310f A200FF
a158-158e3901-4850f A200FF

Copy to clipboard

Issued at: Sunday, March 19, 2023 6:30PM
Issued by: NWAC

2023-03-20 Avalanche Danger

• Moderate danger (above 4851')
• Moderate danger (3901' to 4850')
• Low danger (below 3900')

a0-0e4851-20310f fff200
a0-0e3901-4850f fff200
a0-0e0-3900f 50b848

Copy to clipboard

2023-03-20 Wind Slab

• All aspects (above 4851')
• All aspects (3901' to 4850')

a158-158e4851-20310f A200FF
a158-158e3901-4850f A200FF

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Issued at: Sunday, March 19, 2023 6:30PM
Issued by: NWAC

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-03-20 07:20AM Shade	92 by 2 Copy to clipboard
2023-03-20 08:50AM Shade	109 by 16 Copy to clipboard
2023-03-20 10:20AM Shade	129 by 30 Copy to clipboard
2023-03-20 11:50AM Shade	154 by 39 Copy to clipboard
2023-03-20 01:20PM Shade	183 by 42 Copy to clipboard
2023-03-20 02:50PM Shade	212 by 38 Copy to clipboard
2023-03-20 04:20PM Shade	236 by 27 Copy to clipboard
2023-03-20 05:50PM Shade	255 by 13 Copy to clipboard

Time of day	Lighting (Az/Z)
2023-03-20 07:20AM Shade	92 by 2 Copy to clipboard
2023-03-20 08:50AM Shade	110 by 16 Copy to clipboard
2023-03-20 10:20AM Shade	130 by 29 Copy to clipboard
2023-03-20 11:50AM Shade	154 by 38 Copy to clipboard
2023-03-20 01:20PM Shade	184 by 41 Copy to clipboard
2023-03-20 02:50PM Shade	212 by 37 Copy to clipboard
2023-03-20 04:20PM Shade	236 by 26 Copy to clipboard
2023-03-20 05:50PM Shade	255 by 13 Copy to clipboard

Time of day	Lighting (Az/Z)
2023-03-20 07:20AM Shade	92 by 1 Copy to clipboard
2023-03-20 08:50AM Shade	108 by 16 Copy to clipboard
2023-03-20 10:20AM Shade	128 by 30 Copy to clipboard
2023-03-20 11:50AM Shade	153 by 40 Copy to clipboard
2023-03-20 01:20PM Shade	183 by 43 Copy to clipboard
2023-03-20 02:50PM Shade	212 by 39 Copy to clipboard
2023-03-20 04:20PM Shade	236 by 28 Copy to clipboard
2023-03-20 05:50PM Shade	255 by 14 Copy to clipboard

Time of day	Lighting (Az/Z)
2023-03-20 07:30AM Shade	92 by 1 Copy to clipboard
2023-03-20 09:00AM Shade	109 by 16 Copy to clipboard
2023-03-20 10:30AM Shade	129 by 29 Copy to clipboard
2023-03-20 12:00PM Shade	153 by 39 Copy to clipboard
2023-03-20 01:30PM Shade	183 by 42 Copy to clipboard
2023-03-20 03:00PM Shade	212 by 38 Copy to clipboard
2023-03-20 04:30PM Shade	236 by 27 Copy to clipboard
2023-03-20 06:00PM Shade	255 by 14 Copy to clipboard

Time of day	Lighting (Az/Z)
2023-03-20 07:20AM Shade	91 by 1 Copy to clipboard
2023-03-20 08:50AM Shade	108 by 16 Copy to clipboard
2023-03-20 10:20AM Shade	128 by 29 Copy to clipboard
2023-03-20 11:50AM Shade	153 by 39 Copy to clipboard
2023-03-20 01:20PM Shade	182 by 43 Copy to clipboard
2023-03-20 02:50PM Shade	211 by 38 Copy to clipboard
2023-03-20 04:20PM Shade	235 by 28 Copy to clipboard
2023-03-20 05:50PM Shade	254 by 14 Copy to clipboard

Time of day	Lighting (Az/Z)
2023-03-20 07:20AM Shade	92 by 1 Copy to clipboard
2023-03-20 08:50AM Shade	109 by 16 Copy to clipboard
2023-03-20 10:20AM Shade	129 by 29 Copy to clipboard
2023-03-20 11:50AM Shade	153 by 39 Copy to clipboard
2023-03-20 01:20PM Shade	183 by 42 Copy to clipboard
2023-03-20 02:50PM Shade	212 by 38 Copy to clipboard
2023-03-20 04:20PM Shade	235 by 27 Copy to clipboard
2023-03-20 05:50PM Shade	255 by 14 Copy to clipboard

Time of day	Lighting (Az/Z)
2023-03-20 07:20AM Shade	91 by 1 Copy to clipboard
2023-03-20 08:50AM Shade	109 by 16 Copy to clipboard
2023-03-20 10:20AM Shade	128 by 29 Copy to clipboard
2023-03-20 11:50AM Shade	153 by 39 Copy to clipboard
2023-03-20 01:20PM Shade	182 by 42 Copy to clipboard
2023-03-20 02:50PM Shade	211 by 38 Copy to clipboard
2023-03-20 04:20PM Shade	235 by 27 Copy to clipboard
2023-03-20 05:50PM Shade	254 by 14 Copy to clipboard

Time of day	Lighting (Az/Z)
2023-03-20 07:20AM Shade	91 by 1 Copy to clipboard
2023-03-20 08:50AM Shade	109 by 16 Copy to clipboard
2023-03-20 10:20AM Shade	129 by 29 Copy to clipboard
2023-03-20 11:50AM Shade	153 by 38 Copy to clipboard
2023-03-20 01:20PM Shade	182 by 41 Copy to clipboard
2023-03-20 02:50PM Shade	211 by 37 Copy to clipboard
2023-03-20 04:20PM Shade	235 by 27 Copy to clipboard
2023-03-20 05:50PM Shade	254 by 14 Copy to clipboard

Time of day	Lighting (Az/Z)
2023-03-20 07:20AM Shade	91 by 1 Copy to clipboard
2023-03-20 08:50AM Shade	108 by 16 Copy to clipboard
2023-03-20 10:20AM Shade	127 by 30 Copy to clipboard
2023-03-20 11:50AM Shade	152 by 40 Copy to clipboard
2023-03-20 01:20PM Shade	182 by 43 Copy to clipboard
2023-03-20 02:50PM Shade	211 by 39 Copy to clipboard
2023-03-20 04:20PM Shade	235 by 28 Copy to clipboard
2023-03-20 05:50PM Shade	254 by 14 Copy to clipboard

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