Avalanche Advisory Archive Pre-2016
Date Issued: | 2012-04-12 |
---|---|
Danger: | 2 |
Trend: | 3 |
Probability: | 4 |
Size: | 2 |
Problem: | 0 |
Discussion: | The National Weather Service Forecasts- TODAY...MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE AFTERNOON. TONIGHT...MOSTLY CLOUDY. ISOLATED RAIN SHOWERS. LOWS AROUND 36. NORTHEAST WIND 10 MPH. FRIDAY...MOSTLY CLOUDY. ISOLATED RAIN SHOWERS. HIGHS 52 TO 57. LIGHT WINDS. Well the offshore flow from the SE continues... although it looks like we may see some clouds this afternoon it has been doing a good job of breaking up most every afternoon. Although temperatures flattened out a little yesterday... the overnight low reached a new high with temps of 43f at Eaglecrest and 46f at the Mt Roberts Tram. This is quite warm. Our snowpack is no longer freezing again overnight... this is the 4th night in a row with temps greater than 40f degrees... This continues to erode the bonds in the snowpack deeper and deeper adding to the possible instabilities... Look to see continued avalanche activity as we peel the layers off of the snowpack onion... Steep open slopes will continue to shed. Even more so in shallow areas where this isothermal condition reaches all the way to the ground. Be increasingly aware of the steep sections over the urban paths. The glide cracks on the face of the White Avalanche Path and the Behrands Avalanche Path continue to expand. Releases in these areas are hard to predict yet be aware there is danger present in the meadows above the homes in both paths. Please do not go for walks in the avalanche runout zones in those areas. Snowslide Creek at Thane is also starting to see some glide activity. As well as the presence of a large cornice in this path that is continually weakening... Please do not park at the base of the snowslide creek avalanche path. Recognize that the Flume and Perseverance trail also cross avalanche zones. Chop Gulley above the flume train is starting to get glide cracks as well and will start its spring shedding sometime soon. Be aware that if this goes larger than expected it could reach the trail in this area. Remember with direct sunlight the danger rises... yet even without... right now with the high overnight temps there is danger present on all aspects at most all elevations in our near sea level region. Use caution when traveling in avalanche terrain. |
Tip: | Here is a great read on Snow Stability and Avalanches... http://www.snowman-jim.org/papers/rambler.html |