Eastern Sierra Avalanche Forecast - 1/19/14

Avalanche Advisory published on January 19, 2014 @ 7:10 am
Issued by Sue Burak - Inyo National Forest

There is not enough snow cover to issue avalanche advisories. Read the discussion for updated information and pictures. 

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advisory discussion

Yesterday we travelled to the Coldwater Creek area, looking for deep enough snow to do snowpit tests. The snowpack was composed of the crust/facet sandwich found throughout the forecast area.  Snow hardness in this pit was 4F, very low density and tapping the shovel blade for ECT tests resulted in facets falling out from under the shovel.  

Large depth hoar crystals- 3-4 mm  were found  throughout the snowpack.  Since the pit was dug in a meadow, the large well developed cups and striated crystals formed  because the ground surface was moist and the source of much more water vapor than in forested areas.  

Despite low sun angles, there is enough energy to melt the snow surface even on more shaded aspects. Snow is melting in exposed areas above 9,000 ft. It has to snow soon!!!
weather summary

Dry and mild conditions continue for the week.  Day time highs will reach the upper 40’s at 8,000 to above 10,000 ft. Nights will be mild at the 9,000-9800 ft elevations with lows barely reaching freezing temperatures.  Night time temperatures at elevations above 10,000 ft  will reach the upper 20’s.   Low temperatures in the Crowley Lk and Long Valley area remain in the teens for the week.

The “Ridiculously Resilient Ridge’” is deflecting a series of warm Pacific storms north into Alaska where flooding and mudslides occurred earlier this week. There is a chance of  high elevation snow mid week, but it is more certain that temperatures will fall about 10-15 degrees.   

With a huge ridge over the western U.S. the dry spell is expected to continue for at least the next week.  The Governor  issued a “drought emergency” yesterday. 

Weather Observations Between June (10,000 ft.) and Mammoth (11,000 ft.)
0600 temperature: 30 deg. F.
Max. temperature in the last 24 hours: 48 deg. F.
Average wind direction during the last 24 hours: SW
Average wind speed during the last 24 hours: 5 mph
Maximum wind gust in the last 24 hours: 10 mph
New snowfall in the last 24 hours: 0 inches
Total snow depth: 13 inches
Two-Day Mountain Weather Forecast Produced in partnership with the Reno NWS
For 8,000 ft. to 10,000 ft.
Sunday Sunday Night Monday
Weather: clear clear clear
Temperatures: 48 deg. F. 32 deg. F. 48 deg. F.
Mid Slope Winds: SW E N
Expected snowfall: 0 in. 0 in. 0 in.
Over 10,000 ft.
Sunday Sunday Night Monday
Weather: clear clear clear
Temperatures: 47 deg. F. 27 deg. F. 48 deg. F.
Ridge Top Winds: SW W N
Expected snowfall: 0 in. 0 in. 0 in.
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