Avalanche Advisory Archive Pre-2016

Date Issued:2010-03-16
Danger:2
Trend:3
Probability:3
Size:2
Problem:0
Discussion:

The National Weather Service Forecasts- TODAY, PARTLY CLOUDY. PATCHY FOG IN THE MORNING. BECOMING WINDY. HIGHS AROUND 44. EAST WIND INCREASING TO 15 TO 25 MPH IN THE AFTERNOON. WIND GUSTS AS HIGH AS 45 MPH DEVELOPING IN THE AFTERNOON NEAR DOWNTOWN JUNEAU AND DOUGLAS.

TONIGHT...MOSTLY CLOUDY. A SLIGHT CHANCE OF RAIN IN THE
EVENING...THEN A SLIGHT CHANCE OF RAIN AND SNOW LATE. BREEZY.
LOWS AROUND 33. EAST WIND 15 TO 25 MPH. WIND GUSTS TO 45 MPH
NEAR DOWNTOWN JUNEAU AND DOUGLAS. CHANCE OF PRECIPITATION
20 PERCENT.

WEDNESDAY...RAIN AND SNOW LIKELY IN THE MORNING...THEN RAIN
LIKELY IN THE AFTERNOON. LITTLE OR NO SNOW ACCUMULATION. SNOW
LEVEL 400 FEET INCREASING TO 1100 FEET IN THE AFTERNOON. HIGHS
AROUND 40. LIGHT WINDS. CHANCE OF PRECIPITATION 70 PERCENT.

Yesterday mornings temperature on Mt Roberts is the warmest it has been in the last 14 days. We received a bit of rain during this warm period.

This morning we are seeing cooler temperatures and less moisture in the forecast models. I am lowering the avalanche danger to moderate at this time.

Spatial variability remains high as we have seen quite a bit of wind in the last 10 days. There is great difference in snow density and deposition between windard, cross loaded, and leeward slopes. As well as the differences in the snow density caused by elevation and temperature.

Many weak layers remain present in the snowpack even though they appear to be fairly well bonded and holding weight at this time.

Many weak cornices and overhangs have developed during the last weeks snow and wind events. Consistant loading and warming can create cornice falls that can act as the trigger to release much larger slides.

over the weekend shooting cracks, minor woomphing, sluffing avalanches in the steep areas, slabs breaking out on switchbacks of traverse trails were all noted.

Areas in the backcountry are still quite hazardous at this time.

Please use caution and choose your lines and routes wisely.

Remember. Tranceiver, Probe, Shovel, Partner. Don't leave home without them!

Tip:

For those interested there may still be seats available for the University of Alaska Southeasts Avalanche Level 1 Course.

Avalanche Evaluation and Theory Level 1
University of Alaska Southeast
March 23 - April 4

An intensive course of avalanche study covering rescue, terrain analysis, snow study and stability evaluation, route finding, decision making, and safe travel. Combines both in-class and field oriented backcountry experience as required course components. For more information, contact University of Alaska Southeast.

http://www.uas.alaska.edu/humanities/programs/ods/courses.html