Lawine

Microwave Hill

Payton Schiff & Sam ClairmontSnoqualmie Pass
Auf der Karte ansehen
Beobachtungsfoto 1Beobachtungsfoto 2Beobachtungsfoto 3Beobachtungsfoto 4Beobachtungsfoto 5Beobachtungsfoto 6

Quick report

Well, the snowpack is wet, and we aren't exactly surprised. While a wet snowpack is generally known to be an unstable snowpack, timing is key with wet snow avalanche problems. Other than an old glide avalanche we observed, we did not see any other signs of instability throughout the day. We didn't get our hands on very much terrain, however, so it's hard to make any hard and fast conclusions about snowpack conditions.

We observed what looked to be a glide avalanche. It is impossible to say when exactly it released, but it had to have been sometime this week and likely within the last 48 hours.

Weather

Air Temp
40
Cloud Cover
overcast
Wind Loading
none
Recent Snowfall
0
Snow Avail For Transport
none

Sporadic very light to light rain fell throughout the day. The sky was overcast and even obscured by very low clouds at 4900 ft. In more exposed terrain, the wind was light to moderate with some gusts. It was calm within thick tree canopy. Temperatures were well above freezing throughout the day.

Snowpack

Time spent at middle elevations confirmed the snowpack is getting very wet and warm. We did not go to upper elevation terrain, but one can suspect similar conditions. Lower down in the middle elevation band, around 4300 ft on a southerly aspect, we measured 65cm snowpack depths. We dug a pit on a northeast aspect at 4900 ft. The depth of this pit was 229cm (90in). The top 39cm (15in) of snow we believe was, at one point, close to 1 meter deep. The moisture content throughout the entire snowpack was at least somewhat moist. Water has pooled at the 03/12, 03/08, and 02/07 interfaces. The most water had pooled around the 03/12. We checked the temperature of the snowpack and found it to be at 0 degrees all the way through. We performed a small column test and got no result (CTX).

There was no one boot penetration depth. Sometimes you could walk along and only step 20-30cm through. Other times you'd punch down all the way to your waist.

Avalanche

Size
D1.5
Aspect
NE
Trigger
N
Elevation
4600 ft

A small glide avalanche observed on a northeast aspect at 4600 ft.