Avalanche Advisory Block

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Eastern Sierra Avalanche Advisory - 4/26/17

Bottom Line:

Primary avalanche problem for Wednesday thru Friday will focus on isolated Wind Slabs in the mid to upper elevations and Loose Wet avalanches in the mid to low elevations.

Wind Slabs – Moderate to strong Westerly (Wed) to Northwesterly (Thurs-Fri) winds with the potential for light snowfall (Wed) will form isolated shallow Wind Slabs primarily on exposed N-E-S-SW aspects above ~ 9500’. Natural avalanches unlikely, triggered releases possible below ridgelines, adjacent to terrain features that promote drifting, and in gullies and shallow depressions.     

Loose Wet will be primarily a concern on NW-W-SW-S-SE-E aspects in the mid and all aspects for the low elevations as the surface snow thaws. Temperatures are forecasted to climb into the mid 40’s to mid 50’s below 10,000’. Modest overnight freezes and warm daytime temps will elevate the concern for Loose Wet releases as the surface snow thaws. Moderate to strong Westerly to Northwesterly winds will slow thawing but is a weak counter to the intense April sun. Wed thru Fri - Natural avalanches unlikely, triggered releases possible on steep slopes as the snow surface warms and thaws in the Low to Mid elevations.

Caution – Potential Slide For Life conditions may exist due to firm spring snow conditions prior to thawing. A minor slide into hazardous terrain can have serious consequences.

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