Mountain Weather

CB Avalanche CenterWeather

Date: 03/25/2017

Our intrepid Aspen-bound racers are being greeted by a cloudless sunrise this morning in the heart of the Elks. Mountaintop temperatures hover near 20 degrees under calm winds. Fantastic weather is on tap for the rest of the day, with temperatures forecasted to climb into the mid 30’s. High-level clouds will lower and thicken this afternoon ahead of weak Pacific trough making landfall today. We will see light snow showers develop overnight and wind down tomorrow morning as this fast-mover crosses over Colorado. High pressure redevelops into Monday.

Irwin Tenure

CB Avalanche Center2016-17 Observations

Location: Kebler Pass Area
Date of Observation: 03/24/2017
Name: Irwin Guides
Subject: Irwin Tenure
Aspect:
Elevation:

Avalanches:
Weather:
Snowpack: 5″ of snow overnight w/ .45″ SWE. Sun and warm temps transitioned snow from dry to wet by mid day. 5″ settled to 2″ by end of the day. It felt like when the snow was transitioning it could produce loose wet and not wanting to bond with crust underneath but then got wet and felt well bonded.

East Beckwith Wet Slab

CB Avalanche Center2016-17 Observations

Location: Kebler Pass Area
Date of Observation: 03/21/2017
Name: Michael Mobley
Subject: East Beckwith Wet Slab
Aspect: North, North East, East
Elevation: 12,000

Avalanches: Snowmobiling on Monday evening I spotted this wet side on East Beckwith. I threw the sled in a couple for scale.

Fx Note: this slide looks to have failed as a large wet slab avalanche, on an ENE facing slope between 10,000-12,000ft.
Weather:
Snowpack:

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Mountain Weather 3/24/2017

CB Avalanche CenterWeather

Date: 03/24/2017

Just like tired spring breakers after a big night in town, the closed low pressure system responsible for unsettled weather last night is spinning itself out of the Colorado Rockies and onto the eastern plains. Area accumulations were generally light, 2-4” on Kebler Pass and CBMR, with 9” new snow at Schofield Pass with unusually well behaved NW winds gusting into the 40mph range.

Today, skies will gradually clear throughout the day, and northerly winds will decrease. Temperatures will rebound, with highs in the mid to upper 30s. Our next weather maker looks on track for Saturday night into early Sunday with light snow accumulations expected.

SPECIAL GRAND TRAVERSE WEATHER: The racers from Crested Butte to Aspen dodged a bullet, and got exactly what most had hoped for overnight. A light refresh of snow, and merciful wind. The Upper Taylor River SNOTEL is showing 6” of new snow, a perfect refresh to improve course conditions, but not change avalanche concerns. Look for partly cloudy skies overnight, with low temperatures at Star Pass in the mid teens during the early morning hours. Should be a perfect night of racing, good luck to all, watch those sneaky creek crossings, and keep those feet dry!

Slate River obs

CB Avalanche Center2016-17 Observations

Location: Paradise Divide Area
Date of Observation: 03/23/2017
Name: Zach Guy
Subject: Slate River obs
Aspect: Various aspects observed from valley bottom
Elevation: Below treeline

Avalanches: Not much for recent wet activity up the Slate to Poverty Gulch; a couple of minor D1’s in the past few days on various aspects from extreme/rocky terrain, and 2 larger wet loose off of Climax Chutes, one of which I reported yesterday, the other likely ran yesterday as well. See photos.
Weather:
Snowpack: 3-4″ inch refreeze overnight; supportive to boots in the a.m. unless you took a hard step. Left early before the snow softened.

D2. NE aspect BTL

D1.5 NE aspect BTL. Gouged to the ground up higher in a thin, rocky area.

Mountain Weather 3/23/2017

CB Avalanche CenterWeather

Date: 03/23/2017

We will kick that high pressure and above normal temperatures to the curb today, as a strong Pacific storm churns its way across the Great Basin this morning, leaving us with very different weather by sunset. A strong cold front currently located around Vernal, Utah (4am) will march into Colorado by midday, and we should see gusty winds, an intense period of precipitation, and possible thunderstorms this afternoon. Snow levels will initially ride high (9-10,000ft) this morning, falling during the afternoon to valley bottom by midnight. The changeover to snow will determine the amount of snow accumulation our mountains will see. Strong southerly winds will usher in the cold front today, with strong northwesterly winds behind the front, slowly decreasing by Friday midday.

SPECIAL GRAND TRAVERSE WEATHER: This potent storm system will be short-lived and move quickly out of the race corridor by Friday midday. 8-12” of new snow looks possible, but will hinge on how quickly any rain changes over to snow and how much northerly flow robs or enhances the race course of moisture. Northwest winds look to peak Friday morning around 6am, with nearly calm conditions and temperatures in the teens at Star Pass race night. The CBAC will issue an updated race forecast tomorrow morning.

Wet loose action on BTL northerlies

CB Avalanche Center2016-17 Observations

Location: Crested Butte Area
Date of Observation: 03/22/2017
Name: Zach Guy
Subject: Wet loose action on BTL northerlies
Aspect: North, North East
Elevation: Below treeline

Avalanches: Fresh D1 to D2 wet loose on northerly aspects near town. All of these likely ran last 24 hours, appeared to entrain only the top 5-10″ of wet snow.
-D1 in Half Bowl on Axtell
-D1.5 in Unemployment Chute
-D1.5 and D2 Happy Chutes
-D1.5 in Climax Chutes

Also a 3 or 4 fresh looking D2 glide avalanches on Whetstone, NE aspect BTL. Uncertain on the timing of these, looked to be sometime in the past few days; best guess is they ran today.
Weather:
Snowpack:

D1.5 Happy CHutes
D2 Happy CHutes
D1 Half Bowl

Poor refreeze at Irwin

CB Avalanche Center2016-17 Observations

Location: Kebler Pass Area
Date of Observation: 03/22/2017
Name: Zach Guy
Subject: Poor refreeze at Irwin
Aspect: South East, South, South West
Elevation: 10,000-12,000 ft

Avalanches: Looks like a fresh wet D2 off of NE face of Mt. Owen from the last day or so.
Weather: Overcast skies thickened through the day; some green housing in the morning. High of 45 at 10k, 34 at 12k. Moderate SW ridge top winds
Snowpack: A trace of new snow and rain overnight on top of a thin refreeze. Surfaces remained frozen at 12,000 feet, but the snowpack was or became punchy at lower elevations. Snowmobile track plunging deep when you would get off of old tracks. Didn’t travel on any steep terrain to observe wet instabilities

Mountain Weather

CB Avalanche CenterWeather

Date: 03/22/2017

Warm, moist southwest flow will bring a mix of sun and clouds today ahead of a Pacific trough digging towards the California/Baja coast. Snow showers will kick off mid-day on Thursday as good upper-level support combine with deep Pacific moisture. The trough closes off Thursday night as it approaches southern Colorado, complicating the forecast. A disorganized cold front looks to accompany this closing trough on Thursday evening, fueling additional snowfall and shifting flow to the northwest. The movement of the low becomes harder to pin down on Friday, and models continue to waffle over the finer details of the storm. Our latest high-resolution WRF point forecasts show about 5-6″ of snow by Friday for Taylor and Star Pass, with strong northerly winds easing through the day on Friday.

Red Lady Glades

CB Avalanche Center2016-17 Observations

Location: Crested Butte Area
Date of Observation: 03/21/2017
Name: Ross
Subject: Red Lady Glades
Aspect: South West
Elevation: 8,900-12400

Avalanches:
Weather: Clear sky in the morning becoming overcast as the day progressed. No wind. Temps at 7:30 26f valley bottom. Rapidly warming with strong solar am. Overcast by 12:30 with tens into the mid 40f.
Snowpack: Inversion over night and a slight freeze made for supportable conditions for only a brief moment today. No signs of instability seen. Rapid warming meant we had to be finished by 12:00 due to moist snow pack towards the valley floor. Boot pen at 12:00 was 15-20cm.