Avalanche Forecast
Issued: Jan 14th, 2014 9:45AM
The alpine rating is Storm Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Fair - Freezing levels are uncertain
Weather Forecast
Tonight and Wednesday: The cold front move SE of the region tonight. Precipitation will ease, extreme winds should remain strong from the NW, freezing levels lower to around 600 m by tomorrow morning. Thursday: A ridge of high pressure is well in place. Continuing rising freezing levels climbing to 1700 m on Friday. Strong SW winds are forecasted. Friday overlook: Ridge is still dominating the pattern with clear skies and warm temperatures.
Avalanche Summary
An avalanche cycle is most likely occurring with the present stormy conditions. Yesterday, a natural avalanche size 3.5 was reported SE outside of the region. Explosives also produced up to size 2.5 avalanches in the storm snow yesterday in the NW Coastal region.
Snowpack Summary
60-100 cm of storm snow will have fallen above 1500 m. elevation with extreme W winds. Wet and saturated snowpack under this elevation should start receiving solid precipitation tonight as freezing levels drop. Thick touchy windslabs will keep developping lee of strong NW winds in the alpine and at treeline tomorrow keeping avalanche conditions very dangerous. At lower elevations, a layer of dry snow will cover a very wet snowpack which will could still be susceptible for wet slab avalanches or loose wet avalanches. This instability should not remain for very long since the lowering freezing levels will help stiffening up this wet layer. Under the storm snow, the early January surface hoar layer or facet/crust combo is found in sheltered areas and is still a concern to avalanche professionals. Below this the mid and lower snowpack is gaining strength. The exception is where a layer of weak snow is lingering just above the ground in the shallower snowpack found in the North of the region.
Problems
Storm Slabs
Strong winds will continues loading alp. and upper treeline building thick touchy windslabs. Btw 1500 m and 800 m., the saturated snow should gain strength as the freezing levels drops. Below 800 m. slopes should remain saturated and unstable.
Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.>
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Persistent Slabs
Only for the N sections where it is suspected to be rounding and gaining strength. Probably will get flushed out down south with this storm.
Minimize exposure to overhead avalanche terrain, large avalanches may reach run out zones.>Be aware of the potential for large, deep avalanches due to the presence of buried weak layers.>
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 15th, 2014 2:00PM