prussik1 Posted March 7, 2011 Share Posted March 7, 2011 (edited) Went on a northside tour today, up through Cooper Spur ski resort, to Polallie Ridge following the ridge to Tilly Jane Trail Junction, to Tilly Jane A Frame, then out towards Cloud Cap Inn, taking snowpack observations on a southeast aspect. Then, meeting a friend on the trail, skiied the pink tape route that paralleles the Tilly Jane trail down to the gate. Snowpack observations: 135cm Column Test at 5720' on SE aspect with a 33 degree slope at 14:20. Air temp was -1C, sky partly cloudy, winds calm. No blowing snow. Surface temperature was -1.5C, temperature at 20 cm down was -03C, boot penetration was 40cm. Layers, resistance and temperatures: 0 (surface) fist, -1.5C 17cm down from surface: fist, -4C 65cm down from surface: 4finger, -3C 135cm down from surface: pencil, -2.5C The concern is to watch for the temperature gradient between the 0 layer and 17cm layer. Any temperature change of over 2C in 10cm means that the layers are not bonding well. When snow is deposited on top of these types of layers, it can lead to a higher avalanche risk. Test profile: No propagation of any layers. Fractures at CTM 19@ 30 cm CTH 23@ 130cm Both fractures resulted in Q3 shears. Cheers! Edited March 7, 2011 by prussik1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.