It has been almost 2 weeks since the last measurable snowfall covered the mountains around the forecast zone. The last loading event was on Feb 23rd (as a result of high winds). On this day we had reports of a few slab avalanches as a direct result of sensitive slabs being built by high winds. Over the last 5 days we have had a consistent melt freeze cycle. This cycle initially produced a round of wet loose and a few slab avalanches.
Another solid freeze overnight will keep the surface snow firm for most of the day. Very steep south facing slopes will likely see some melting today. Because of this it will be important to pay attention to the snow surface as it melts. Very small wet loose avalanches will be possible today in this terrain.
Other hazards to consider today are:
Cornices. Give cornices a wide berth both above and below. Sunshine coupled with a lack of wind will aid in destabilizing these features.
Persistent slabs in steep high elevation terrain on the periphery of the forecast zone and in outlying areas. Melt freeze and sun crusts exist on all surfaces up to most ridgelines and summits. Above 4,000’ (which is a small percentage of the terrain in the advisory area) it will be possible to find dry surface snow. 1-3’ below the surface is a weak layer of facets sitting on the January crust. This layer has not been reactive of late but still exists. It will be remotely possible to trigger an avalanche in very steep terrain that has not been subject to this recent melt freeze cycle.
LOW hazard does not mean NO hazard. It is important to continue to practice good travel habits; expose only one person at a time on steep terrain, avoid cornices, communicate your decisions & plans, and carry and know how to use rescue gear.
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