Date Issued:2013-03-09
Danger:2
Trend:4
Probability:3
Size:2
Problem:0
Discussion:

The National Weather Service Forecasts-

TODAY...RAIN...MIXING WITH SNOW IN THE MORNING. LITTLE OR NO SNOW ACCUMULATION. HIGHS AROUND 39. SOUTHEAST WIND 10 TO 15 MPH.

TONIGHT...RAIN IN THE EVENING...THEN SNOW AND RAIN SHOWERS LIKELY LATE. SNOW ACCUMULATION TO 1 INCH. LOWS AROUND 31. SOUTH WIND 10 MPH.

SUNDAY...SNOW SHOWERS LIKELY...THEN RAIN SHOWERS LIKELY IN THE AFTERNOON. SNOW ACCUMULATION TO 1 INCH. SNOW LEVEL RISING TO 600 FEET IN THE AFTERNOON. HIGHS AROUND 39. SOUTHEAST WIND 10 MPH.

SUNDAY NIGHT...SNOW LIKELY. LOWS AROUND 28. SOUTHEAST WIND
10 MPH.

It has been clear and cool for a week following a snowfall and wind event. We still have pockets of shallow windslab in places in the backcountry. Under this windslab we had a strong temperature gradient leading to faceting in the snowpack which weakens its ability to support new load. This is spatially variable and does not exist everywhere.

On south facing slopes the sun took affect leaving a sun crust in places as well.

On North facing slope and shaded aspects we some some surface hoar formation which also does not support new snow load well.

Be aware that these are the conditions this new snow is falling on.

We received roughly 8mm or SWE and 8cm of new snow in the last 9 hours. During that time winds were 10-30mph and gusting higher on Douglas Island. Most of these winds were out of our traditional SSE. Eaglecrest is showing much more snow with more like 8\".

Look to see new windloaded snow on NNW slopes at upper elevations near summit and ridgeline. Recognize this new snow will probably not bond very well to the old snow surface.

Small human triggered avalanches are possible in these locations. Natural avalanches remain unlikely until the load increases.

Avalanche danger is Moderate at this time and increasing during todays new snow event.

Dangers will rise slightly into tomorrow.

Use caution in the backcountry and have a great day.

Tip:

Special thanks to all the teams participating in the 3rd annual Douglas Island Avalanche Rescue Drill.

SEADOGS, Juneau Mountain Rescue, Juneau Snowmobile Club, Capital City Fire Rescue, Juneau Ski Patrol, and the US Coast Guard! We are so very lucky to have such amazing teams in our community to support Mountain Rescue and Search and Rescue.

THANK YOU!