Avalanche Advisory: Saturday - Apr 13, 2019

THIS AVALANCHE ADVISORY EXPIRED ON April 14, 2019 @ 6:34 am
Avalanche Advisory published on April 13, 2019 @ 6:34 am
Issued by Steve Mace - ESAC

*Advisories will continue to be issued 4 days a week through April 21st. After the 21st, we will be issuing weekly snowpack summaries on Thursdays until May 9th. *

* This Avalanche Advisory is in effect for Saturday, April 13th*

Heightened avalanche conditions exist throughout the forecast area. Expect daytime warming to increase the risk of Loose Wet avalanches at all elevations.  You can also expect fresh sensitive wind slabs on specific terrain features at mid and upper elevations. Evaluate snow conditions and terrain carefully and avoid features of concern.

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Near Treeline

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Below Treeline
Avalanche Problem 1: Loose Wet
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With warm temperatures, light winds, and clear skies today it will be possible to see loose wet avalanches at all elevations.  Solar aspects will be most concerning today particularly in areas with a healthy coat of new snow after Thursday's storm. Increasing boot penetration, wet, sticky snow surfaces, and rollerballs are all signs of surface warming and may foreshadow larger point release avalanches.  Expect lower elevations to be of greater concern than alpine terrain and be prepared for the danger to be low in the morning, rising throughout the day as the ambient air temperature increases.

Avalanche Problem 2: Wind Slab
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Storm totals from this Thursday’s storm vary across the range. Recent observations describe totals ranging from 1-10” of fresh snow depending largely on elevation.  Moderate to strong North winds have also done their part to transport loose snow to leeward slopes. Expect fresh sensitive wind slabs to be possible on E-S-W facing terrain at mid and upper elevations. Problem areas will be specific to terrain features that encourage drifting such as the leeward sides of ridgelines, gully features, and cross-loaded depressions.  Be particularly cautious in extreme terrain or on steep unsupported slopes where the consequences of an avalanche are elevated. Surface clues such as blowing snow, recent cornice growth and uneven snow surfaces can help to identify and avoid areas of recent wind deposit.  It’s worth noting that the north winds have been loading solar slopes.  With warm temperatures and clear skies expected today resulting wind slabs might become more sensitive as things warm up.

advisory discussion

As our active spring continues, be ready for anything as you head into the backcountry.  Recent observations have reported everything from wintery powder skiing to high quality corn skiing.  Doing your own localized assessments will be important today, conditions may vary greatly depending on where you are in the range.  

 

 

Weather and CURRENT CONDITIONS
weather summary

 Expect the high pressure to continue today leading to warmer temperatures, clear skies and light winds out of the west.  Daytime highs are expected to reach into the mid 40s at upper elevations.  Wind speeds will increase this evening with gusts up to 40mph expected after midnight. 

Things will cool off a bit tonight with temperatures expected near freezing at lower elevations. We can expect another warm day tomorrow with temperatures reaching into the low 40s at upper elevations and moderate to strong southwest winds.

 

Two-Day Mountain Weather Forecast Produced in partnership with the Reno NWS
For 8,000 ft. to 10,000 ft.
Saturday Saturday Night Sunday
Weather: Sunny. Clear. Sunny.
Temperatures: 46 to 56. deg. F. 26 to 36. deg. F. 43 to 53. deg. F.
Mid Slope Winds: Light winds. Southwest around 15 mph. Gusts up to 40 mph after midnight. Southwest 15 to 25 mph. Gusts up to 45 mph increasing to 60 mph in the afternoon.
Expected snowfall: 0 in. 0 in. 0 in.
Over 10,000 ft.
Saturday Saturday Night Sunday
Weather: Sunny. Clear. Sunny.
Temperatures: 38 to 46. deg. F. 22 to 32. deg. F. 35 to 43. deg. F.
Ridge Top Winds: West around 15 mph. Southwest 15 to 25 mph. Gusts up to 25 mph increasing to 40 mph after midnight. Southwest 20 to 35 mph with gusts to 60 mph.
Expected snowfall: 0 in. 0 in. 0 in.
Disclaimer
This Avalanche Advisory is designed to generally describe avalanche conditions where local variations always occur. This product only applies to backcountry areas located outside established ski area boundaries. The information in this Avalanche Advisory is provided by the Eastern Sierra Avalanche Center, who is solely responsible for its content.

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