Avalanche Advisory Archive Pre-2016
| Date Issued: | 2012-04-11 |
|---|---|
| Danger: | 2 |
| Trend: | 3 |
| Probability: | 4 |
| Size: | 1 |
| Problem: | 0 |
| Discussion: | The National Weather Service Forecasts- TODAY...MOSTLY CLOUDY. ISOLATED RAIN SHOWERS. HIGHS AROUND 53. TONIGHT...MOSTLY CLOUDY. SCATTERED RAIN SHOWERS. LOWS AROUND 37. NORTHEAST WIND 10 MPH. THURSDAY...DECREASING CLOUDS. HIGHS AROUND 54. NORTHEAST WIND Temperatures continue to remain quite warm. The Mt Roberts Tram Weather Station is only showing about 12 hours of below freezing temperatures in the last 10 days. Overnight lows have remained higher than 40 degrees at Tram Summit elevations. The free moisture in the snowpack continues to penetrate deeper and deeper especially in areas around trees and rocks that act as heat magnets. The upper layers of the snowpack are becomimg isothermal and at lower elevations and around some trees and rocke it has gone all the way to the ground. This eats at the bonds in the snowpack. The glue is gone... what is left is no longer the block of ice it was two weeks ago. It is starting to become a slurpee... and on steeper pitches continues to fight gravity until it releives itself of this stress in the form of wet spring avalanches. Most of this activity remains small yet in a few key locations it is important to recognize they could be large enough to have an effect. Once again please avoid parking at Snowslide Creek along Thane Road. The upper cornice there may becoming weak. Also the face itself has developed several glide cracks that have the ability to turn into full depth glide avalanches. Please avoid walking in the avalanche runout zoned above the Behrands Neighborhood. There are also large glide cracks accross the middle of the Behrands avalanche path that continue to slowly expand. If we see this predicted rain showers this could actually add additional free moisture to the snowpack and tip the balance to seeing even more activity. Most slides should be small yet recognize if your in the wrong place at the wrong time... there is no such thing as small... Have a good day... and hope the sun comes out to play once again! |
| Tip: | Here is an interesting article on avalanches... and the price of war... http://www.sfgate.com/cgibin/article.cgif=/c/a/2012/04/09/MN121O0PDQ.DTL |