Washington Avalanche Maps

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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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Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

Pre-populated CalTopo Map

East Slopes Central
Avalanche Report

2023-04-02 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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2023-04-02 Wind Slab

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

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

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2023-04-02 Wet Loose

• E to W aspects (3901' to 4850')
• E to W aspects (below 3900')

a68-293e3901-4850f 0000FF
a68-293e0-3900f 0000FF

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Issued at: Saturday, April 01, 2023 6:30PM
Issued by: NWAC

East Slopes North
Avalanche Report

2023-04-02 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

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2023-04-02 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: Saturday, April 01, 2023 6:30PM
Issued by: NWAC

East Slopes South
Avalanche Report

2023-04-02 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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2023-04-02 Wind Slab

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

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

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2023-04-02 Wet Loose

• E to W aspects (3901' to 4850')
• E to W aspects (below 3900')

a68-293e3901-4850f 0000FF
a68-293e0-3900f 0000FF

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Issued at: Saturday, April 01, 2023 6:34PM
Issued by: NWAC

Olympics
Avalanche Report

Report not available. See NWAC for more information.

Issued at: Sunday, March 26, 2023 6:30PM
Issued by: NWAC

Snoqualmie Pass
Avalanche Report

2023-04-02 Avalanche Danger

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

a0-0e4851-20310f f7941e
a0-0e3901-4850f f7941e
a0-0e0-3900f fff200

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2023-04-02 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: Saturday, April 01, 2023 6:30PM
Issued by: NWAC

Stevens Pass
Avalanche Report

2023-04-02 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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2023-04-02 Wind Slab

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

a158-158e4851-20310f A200FF
a339-339e3901-4850f A200FF
a158-158e0-3900f A200FF

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Issued at: Saturday, April 01, 2023 6:30PM
Issued by: NWAC

West Slopes Central
Avalanche Report

2023-04-02 Avalanche Danger

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

a0-0e4851-20310f f7941e
a0-0e3901-4850f f7941e
a0-0e0-3900f fff200

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2023-04-02 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: Saturday, April 01, 2023 6:40PM
Issued by: NWAC

West Slopes North
Avalanche Report

2023-04-02 Avalanche Danger

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

a0-0e4851-20310f f7941e
a0-0e3901-4850f fff200
a0-0e0-3900f fff200

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2023-04-02 Wind 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: Saturday, April 01, 2023 6:30PM
Issued by: NWAC

West Slopes South
Avalanche Report

2023-04-02 Avalanche Danger

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

a0-0e4851-20310f f7941e
a0-0e3901-4850f f7941e
a0-0e0-3900f f7941e

Copy to clipboard

2023-04-02 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: Saturday, April 01, 2023 6:30PM
Issued by: NWAC

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-02 06:50AM Shade	84 by 1 Copy to clipboard
2023-04-02 08:20AM Shade	100 by 16 Copy to clipboard
2023-04-02 09:50AM Shade	119 by 30 Copy to clipboard
2023-04-02 11:20AM Shade	143 by 42 Copy to clipboard
2023-04-02 12:50PM Shade	174 by 47 Copy to clipboard
2023-04-02 02:20PM Shade	206 by 45 Copy to clipboard
2023-04-02 03:50PM Shade	233 by 35 Copy to clipboard
2023-04-02 05:20PM Shade	253 by 21 Copy to clipboard
2023-04-02 06:50PM Shade	270 by 7 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-02 06:50AM Shade	84 by 1 Copy to clipboard
2023-04-02 08:20AM Shade	101 by 16 Copy to clipboard
2023-04-02 09:50AM Shade	120 by 30 Copy to clipboard
2023-04-02 11:20AM Shade	144 by 41 Copy to clipboard
2023-04-02 12:50PM Shade	175 by 46 Copy to clipboard
2023-04-02 02:20PM Shade	206 by 44 Copy to clipboard
2023-04-02 03:50PM Shade	233 by 34 Copy to clipboard
2023-04-02 05:20PM Shade	253 by 21 Copy to clipboard
2023-04-02 06:50PM Shade	271 by 6 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-02 07:00AM Shade	85 by 2 Copy to clipboard
2023-04-02 08:30AM Shade	102 by 18 Copy to clipboard
2023-04-02 10:00AM Shade	121 by 32 Copy to clipboard
2023-04-02 11:30AM Shade	145 by 43 Copy to clipboard
2023-04-02 01:00PM Shade	177 by 48 Copy to clipboard
2023-04-02 02:30PM Shade	209 by 45 Copy to clipboard
2023-04-02 04:00PM Shade	235 by 34 Copy to clipboard
2023-04-02 05:30PM Shade	255 by 20 Copy to clipboard
2023-04-02 07:00PM Shade	272 by 5 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-03-27 07:20AM Shade	88 by 2 Copy to clipboard
2023-03-27 08:50AM Shade	105 by 17 Copy to clipboard
2023-03-27 10:20AM Shade	125 by 31 Copy to clipboard
2023-03-27 11:50AM Shade	150 by 41 Copy to clipboard
2023-03-27 01:20PM Shade	180 by 45 Copy to clipboard
2023-03-27 02:50PM Shade	211 by 41 Copy to clipboard
2023-03-27 04:20PM Shade	235 by 31 Copy to clipboard
2023-03-27 05:50PM Shade	255 by 17 Copy to clipboard
2023-03-27 07:20PM Shade	272 by 2 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-02 07:00AM Shade	85 by 2 Copy to clipboard
2023-04-02 08:30AM Shade	102 by 17 Copy to clipboard
2023-04-02 10:00AM Shade	121 by 31 Copy to clipboard
2023-04-02 11:30AM Shade	145 by 43 Copy to clipboard
2023-04-02 01:00PM Shade	177 by 48 Copy to clipboard
2023-04-02 02:30PM Shade	209 by 44 Copy to clipboard
2023-04-02 04:00PM Shade	235 by 34 Copy to clipboard
2023-04-02 05:30PM Shade	255 by 20 Copy to clipboard
2023-04-02 07:00PM Shade	272 by 5 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-02 06:50AM Shade	83 by 1 Copy to clipboard
2023-04-02 08:20AM Shade	100 by 16 Copy to clipboard
2023-04-02 09:50AM Shade	119 by 30 Copy to clipboard
2023-04-02 11:20AM Shade	143 by 41 Copy to clipboard
2023-04-02 12:50PM Shade	173 by 47 Copy to clipboard
2023-04-02 02:20PM Shade	206 by 45 Copy to clipboard
2023-04-02 03:50PM Shade	232 by 35 Copy to clipboard
2023-04-02 05:20PM Shade	253 by 22 Copy to clipboard
2023-04-02 06:50PM Shade	270 by 7 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-02 07:00AM Shade	85 by 2 Copy to clipboard
2023-04-02 08:30AM Shade	102 by 17 Copy to clipboard
2023-04-02 10:00AM Shade	121 by 31 Copy to clipboard
2023-04-02 11:30AM Shade	146 by 42 Copy to clipboard
2023-04-02 01:00PM Shade	177 by 47 Copy to clipboard
2023-04-02 02:30PM Shade	208 by 44 Copy to clipboard
2023-04-02 04:00PM Shade	234 by 34 Copy to clipboard
2023-04-02 05:30PM Shade	255 by 20 Copy to clipboard
2023-04-02 07:00PM Shade	272 by 5 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-02 06:50AM Shade	83 by 1 Copy to clipboard
2023-04-02 08:20AM Shade	100 by 15 Copy to clipboard
2023-04-02 09:50AM Shade	119 by 29 Copy to clipboard
2023-04-02 11:20AM Shade	143 by 40 Copy to clipboard
2023-04-02 12:50PM Shade	173 by 46 Copy to clipboard
2023-04-02 02:20PM Shade	205 by 44 Copy to clipboard
2023-04-02 03:50PM Shade	231 by 35 Copy to clipboard
2023-04-02 05:20PM Shade	252 by 22 Copy to clipboard
2023-04-02 06:50PM Shade	270 by 7 Copy to clipboard

Sunlight Angles

Time of day	Lighting (Az/Z)
2023-04-02 07:00AM Shade	85 by 2 Copy to clipboard
2023-04-02 08:30AM Shade	101 by 17 Copy to clipboard
2023-04-02 10:00AM Shade	120 by 32 Copy to clipboard
2023-04-02 11:30AM Shade	144 by 43 Copy to clipboard
2023-04-02 01:00PM Shade	176 by 49 Copy to clipboard
2023-04-02 02:30PM Shade	209 by 45 Copy to clipboard
2023-04-02 04:00PM Shade	235 by 35 Copy to clipboard
2023-04-02 05:30PM Shade	255 by 21 Copy to clipboard
2023-04-02 07:00PM Shade	272 by 6 Copy to clipboard

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