Spring Time Avalanche Concerns
Wet Snow avalanches are the most common concern this time of year as a strong sun and warm temperatures melt the snow, making it wet and sloppy. Signs of instability include rollerballs, pinwheels, and point-release sluffs. Wet snow avalanches can take the form of loose snow or in some cases, much more dangerous and harder to predict slabs. Nights where the snowpack doesn't re-freeze contribute significantly to increased instability.
New and Wind Drifted Snow can cause the avalanche danger to rise just like in the winter. Poorly bonded new snow can cause problems on all aspects when there is more than about 6" of new snow. Loose snow sluffs and soft slab avalanches are possible. This type of instability typically settles out in a day or two. If however, moderate to strong winds are involved, just a few inches of snow can translate to deeper, unstable drifts on the leeward sides of ridge crests and terrain features. Recent wind drifts are recognizable by their smooth, rounded appearance and cracking is a sign of instability. Unstable wind drifts can linger for days or even up to a week.
Persistent Weak Layers can occasionally linger well into spring and deep and dangerous avalanches remain possible. Weak, faceted snow tends to hang around on northerly aspects and shallower snowpack areas around cliffs and rock outcroppings. Avoiding likely trigger points such as thin slope margins or steep convexities are ways to minimize your risk for this low probability but high consequence hazard.