Snowpits dug in the June Mountain area suggest the inter storm layer noted previously this week is strengthening. Many north through east facing slopes steeper than 35 degrees avalanched during last weekend's storm.
Today along high ridge tops in the June Mountain area, old wind drifts were visible but did not react to ski tests. Snow depths were shallower than average snow depths in the Mammoth Basin (4 ft compared to ~5-6 ft.)- probably because of the widespread avalanche cycle that occurred in the Negatives and on north and east facing high elevation slopes around San Joaquin Mountain. Most avalanches ran on the old snow surface that existed prior to the Feb 28-March 2 storm. Multiple extended column tests on northerly slopes above 10,000 ft. produced no propagation at 28 to 30 taps.
Observers noted small wet snow slides on east to southeast facing slopes in the Mammoth Basin. A report from the Sherwin Ridge told of winter snow along the ridge and mixed stability test results on an inter storm layer about 15 inches down from the snow surface. Mid elevations were loose and unsupportable in places.