Avalanche Advisory Archive Pre-2016

Date Issued:2012-02-06
Danger:3
Trend:4
Probability:2
Size:2
Problem:0
Discussion:

The National Weather Service Forecasts-

TODAY...DECREASING CLOUDS. ISOLATED RAIN AND SNOW SHOWERS IN THE MORNING. HIGHS 37 TO 42. NORTHEAST WIND 10 TO 15 MPH.

TONIGHT...MOSTLY CLEAR. AREAS OF FOG LATE. LOWS 20 TO 26...EXCEPT AROUND 38 NEAR DOWNTOWN JUNEAU AND DOUGLAS. NORTH WIND 10 TO 20 MPH WITH HIGHER GUSTS NEAR INTERIOR PASSES LATE.

TUESDAY...MOSTLY SUNNY. AREAS OF FOG IN THE MORNING. HIGHS AROUND 40. EAST WIND 10 TO 20 MPH.

The temperatures at the Tram Summit elevation have been above freezing for 54+ hours...

Temperatures at the Eaglecrest summit have been below freezing for the last 6-8 hours and were barely above freezing for about 20 hours.

The temperature at the Airport is currently 29 degrees.

So while temperatures at our mountain top summit elevations, and valley bottom have been below freezing some of the time over the last 2-3 days. Mid mountain elevations are staying above freezing.

This is a concern as it is creating spring like conditions.

The snowpack at mid mountain elevations is starting to have a little more free moisture and less glue holding it together.

During the heat of the day with diurnal fluctuations driving all the temperatures in the region above freezing the upper mountain and valley floor will also see more spring like conditions and become more of a concern.

There is not much stress being added to the snowpack in the form of precipitation which is good. Yet with above freezing temperatures the snowpack is still weak in places.

Knowing that in areas there is the possibility of wet natural avalanches as the snow cleans itself off of the steep rock faces and unanchored slopes. Avalanche danger is CONSIDERABLE at this time.

Natural avalanches possible, mostly smaller wet slides on steep open slopes. Human triggered avalanches are possible as well, especially in mid elevations which have been above freezing the longest.

Be cautious on steep, open, unsupported convex slopes.

Limit your exposure to hanging slabs above cliffs. During mid day the cornices will also be weaker.

The forecast range for temperatures overnight is quite wide with temps anywhere from 20-38 degrees depending on location.

Tomorrow will bring higher temperatures, and more direct sunlight which will add additional stress to the snowpack and remove the glue holding it all together especially on slopes facing more south. The likelyhood of avalanches will grow additionally at that time.

Tip:

Although it is nice to go out Thane and look up at the Avalanche debris and path... Please recognize that area is quite steep, and there is a lot of snow on the hill... The possibility of natural avalanches exists. I would suggest to limit your time in that area. Driving through is probably not a concern... but I would not park there to get out, take pictures, and look around. Please use a little common sense and caution. THANK YOU!