Washington Avalanche Map


"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

Select A Zone:

East Slopes Central

Pre-populated CalTopo Map

East Slopes North

Pre-populated CalTopo Map

East Slopes South

Pre-populated CalTopo Map

Snoqualmie 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
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

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

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
2023-03-20 Wind Slab
  • All aspects (above 4851')
a158-158e4851-20310f A200FF

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
2023-03-20 Wind Slab
  • All aspects (above 4851')
  • All aspects (3901' to 4850')
a158-158e4851-20310f A200FF
a158-158e3901-4850f A200FF
2023-03-20 Wet Loose
  • All aspects (below 3900')
a158-158e0-3900f 0000FF

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
2023-03-20 Wind Slab
  • All aspects (above 4851')
a158-158e4851-20310f A200FF

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
2023-03-20 Wind Slab
  • All aspects (above 4851')
  • All aspects (3901' to 4850')
a158-158e4851-20310f A200FF
a158-158e3901-4850f A200FF

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
2023-03-20 Wind Slab
  • All aspects (above 4851')
  • All aspects (3901' to 4850')
a158-158e4851-20310f A200FF
a158-158e3901-4850f A200FF

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
2023-03-20 Wind Slab
  • All aspects (above 4851')
  • All aspects (3901' to 4850')
a158-158e4851-20310f A200FF
a158-158e3901-4850f A200FF

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
2023-03-20 08:50AM Shade 109 by 16
2023-03-20 10:20AM Shade 129 by 30
2023-03-20 11:50AM Shade 154 by 39
2023-03-20 01:20PM Shade 183 by 42
2023-03-20 02:50PM Shade 212 by 38
2023-03-20 04:20PM Shade 236 by 27
2023-03-20 05:50PM Shade 255 by 13
Time of day Lighting (Az/Z)
2023-03-20 07:20AM Shade 92 by 2
2023-03-20 08:50AM Shade 110 by 16
2023-03-20 10:20AM Shade 130 by 29
2023-03-20 11:50AM Shade 154 by 38
2023-03-20 01:20PM Shade 184 by 41
2023-03-20 02:50PM Shade 212 by 37
2023-03-20 04:20PM Shade 236 by 26
2023-03-20 05:50PM Shade 255 by 13
Time of day Lighting (Az/Z)
2023-03-20 07:20AM Shade 92 by 1
2023-03-20 08:50AM Shade 108 by 16
2023-03-20 10:20AM Shade 128 by 30
2023-03-20 11:50AM Shade 153 by 40
2023-03-20 01:20PM Shade 183 by 43
2023-03-20 02:50PM Shade 212 by 39
2023-03-20 04:20PM Shade 236 by 28
2023-03-20 05:50PM Shade 255 by 14
Time of day Lighting (Az/Z)
2023-03-20 07:30AM Shade 92 by 1
2023-03-20 09:00AM Shade 109 by 16
2023-03-20 10:30AM Shade 129 by 29
2023-03-20 12:00PM Shade 153 by 39
2023-03-20 01:30PM Shade 183 by 42
2023-03-20 03:00PM Shade 212 by 38
2023-03-20 04:30PM Shade 236 by 27
2023-03-20 06:00PM Shade 255 by 14
Time of day Lighting (Az/Z)
2023-03-20 07:20AM Shade 91 by 1
2023-03-20 08:50AM Shade 108 by 16
2023-03-20 10:20AM Shade 128 by 29
2023-03-20 11:50AM Shade 153 by 39
2023-03-20 01:20PM Shade 182 by 43
2023-03-20 02:50PM Shade 211 by 38
2023-03-20 04:20PM Shade 235 by 28
2023-03-20 05:50PM Shade 254 by 14
Time of day Lighting (Az/Z)
2023-03-20 07:20AM Shade 92 by 1
2023-03-20 08:50AM Shade 109 by 16
2023-03-20 10:20AM Shade 129 by 29
2023-03-20 11:50AM Shade 153 by 39
2023-03-20 01:20PM Shade 183 by 42
2023-03-20 02:50PM Shade 212 by 38
2023-03-20 04:20PM Shade 235 by 27
2023-03-20 05:50PM Shade 255 by 14
Time of day Lighting (Az/Z)
2023-03-20 07:20AM Shade 91 by 1
2023-03-20 08:50AM Shade 109 by 16
2023-03-20 10:20AM Shade 128 by 29
2023-03-20 11:50AM Shade 153 by 39
2023-03-20 01:20PM Shade 182 by 42
2023-03-20 02:50PM Shade 211 by 38
2023-03-20 04:20PM Shade 235 by 27
2023-03-20 05:50PM Shade 254 by 14
Time of day Lighting (Az/Z)
2023-03-20 07:20AM Shade 91 by 1
2023-03-20 08:50AM Shade 109 by 16
2023-03-20 10:20AM Shade 129 by 29
2023-03-20 11:50AM Shade 153 by 38
2023-03-20 01:20PM Shade 182 by 41
2023-03-20 02:50PM Shade 211 by 37
2023-03-20 04:20PM Shade 235 by 27
2023-03-20 05:50PM Shade 254 by 14
Time of day Lighting (Az/Z)
2023-03-20 07:20AM Shade 91 by 1
2023-03-20 08:50AM Shade 108 by 16
2023-03-20 10:20AM Shade 127 by 30
2023-03-20 11:50AM Shade 152 by 40
2023-03-20 01:20PM Shade 182 by 43
2023-03-20 02:50PM Shade 211 by 39
2023-03-20 04:20PM Shade 235 by 28
2023-03-20 05:50PM Shade 254 by 14

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