The last avalanche forecast for the 2023-2024 season posted on April 21st. Thank you to all who contributed to the avalanche center this season through observations, volunteer time, and/or financial contributions.
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The last avalanche forecast for the 2023-2024 season posted on April 21st. Thank you to all who contributed to the avalanche center this season through observations, volunteer time, and/or financial contributions.
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November 19, 2010 at 7:44 am |
For most of today, avalanche danger is LOW for all elevations and aspects. Isolated areas of instability may form this evening after the onset of snowfall sometime this afternoon. A significant increase in avalanche danger is expected overnight into Saturday. |
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A significant winter storm is starting to impact the forecast area. Gale force ridgetop winds out of the southwest began yesterday and will continue through this weekend. Snowfall is expected to begin sometime this afternoon or evening with the potential for 4 to 6 feet of new snow accumulating above 7,000' by Monday morning. Air temperatures at most elevations will be in the mid to upper 30s today, falling into the teens overnight. Maximum daytime air temperatures above 8,000' are expected to remain in the teens and single digits for the weekend and possibly beyond.
Observations made over the past two days in the Tamarack Peak (Mount Rose area) and Elephant's Back (Carson Pass) areas reveal a mix of bare ground, crusts, and lightly faceted snow (click here for pit profiles and photos). This limited number of observations has revealed no evidence of snowpack instability despite the crusts and lightly faceted snow crystals in the existing snowpack. Old snow on the ground is most abundant on N-NE-E aspects, with snow depths generally ranging from 4 to 16 inches. A strong east wind event that occurred during the past week scoured many N-NE-E aspects and avalanche start zones in near and above treeline areas.
Avalanche Concerns:
Based on a limited number of observations, the shallow existing snowpack appears to be in good condition to handle new snow loading. Avalanche concerns focus on storm snow from the approaching storm. After the onset of snowfall later today, isolated areas of instability may form as early as this evening. These pockets of unstable snow will form first in the most heavily wind loaded areas on N-NE-E aspects and become more widespread overnight. Snowpack instability is expected to become increasingly widespread this weekend.
For most of today, avalanche danger is LOW for all elevations and aspects. Isolated areas of instability may form this evening after the onset of snowfall sometime this afternoon. A significant increase in avalanche danger is expected overnight into Saturday.
0600 temperature: | 27 to 34 deg. F. |
Max. temperature in the last 24 hours: | 42 to 44 deg. F. |
Average wind direction during the last 24 hours: | Southwest |
Average wind speed during the last 24 hours: | 45 mph |
Maximum wind gust in the last 24 hours: | 110 mph |
New snowfall in the last 24 hours: | O inches |
Total snow depth: | 0 to 16 inches |
For 7000-8000 ft: |
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Friday: | Friday Night: | Saturday: | |
Weather: | Increasing clouds with snow developing in the afternoon. | Cloudy skies with snow. | Cloudy skies with snow. |
Temperatures: | 35 to 41 deg. F. | 14 to 21 deg. F. | 15 to 22 deg. F. |
Wind direction: | SW | SW | SW |
Wind speed: | 20 to 30 mph with gusts to 60 mph. | 20 to 30 mph with gusts to 55 mph. | 20 to 30 mph with gusts to 55 mph. |
Expected snowfall: | 1 to 3 in. | 10 to 16 in. | 6 to 12 in. |
For 8000-9000 ft: |
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Friday: | Friday Night: | Saturday: | |
Weather: | Increasing clouds with snow developing in the afternoon. | Cloudy skies with snow. | Cloudy skies with snow. |
Temperatures: | 30 to 36 deg. F. | 10 to 17 deg. F. | 12 to 19 deg. F. |
Wind direction: | SW | SW | SW |
Wind speed: | 40 to 55 mph with gusts to 95 mph. | 40 to 60 mph with gusts to 85 mph. | 45 to 60 mph with gusts to 90 mph. |
Expected snowfall: | 1 to 3 in. | 10 to 18 in. | 6 to 12 in. |
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