Avalanche Advisory Archive Pre-2016

Date Issued:2010-01-24
Danger:1
Trend:4
Probability:1
Size:1
Problem:0
Discussion:

THE NATIONAL WEATHER SERVICE FORECASTS-TODAY...SNOW LIKELY IN THE MORNING...THEN SNOW AND RAIN IN THE AFTERNOON. LOCALLY WINDY. SNOW ACCUMULATION 1 TO 2 INCHES. HIGHS AROUND 33. SOUTHEAST WIND 15 TO 25 MPH WITH HIGHER GUSTS NEAR DOWNTOWN JUNEAU...SOUTH DOUGLAS AND OUT OF INTERIOR PASSES IN THE MORNING. OTHERWISE SOUTHEAST WIND 15 MPH.

TONIGHT...SNOW AND RAIN LIKELY. LOCALLY BREEZY. SNOW ACCUMULATION 1 TO 2 INCHES. LOWS 28 TO 34. EAST WIND 15 TO 25
MPH. CHANCE OF PRECIPITATION 70 PERCENT.

WEDNESDAY...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF RAIN AND SNOW. HIGHS AROUND 38. EAST WIND 10 TO 20 MPH.

With no new snow in the last week. The snow in place has had quite a bit of time to settle and bond. Conditions are quite stable at this time.

As we start to get the new snow it will be interesting to see how this bonds to the soft snow in place. Spatial variability will be quite high and layering should be interesting to see.

We have had a fair amount of wind in the last week which has placed a few small isolated slabs in wind loaded areas.

Tip:

There are 5 red flag indicators of avalanche conditions.

Recent avalanches
Woomphing, Shooting cracks, snow colapsing
Wind Especially 10-30 mph with new snow to transport
New snow or rain especially more than 1\" of snow or .1\" of rain per hour and 1'of snow or 1\" of rain per day.
Rapid warming or Super rapid cooling
Recent avalanches.

Wind is the only indicator at this time. And there is not much snow available for wind transport at this time.

After the new snow begins we will start to see more indicators of instability.