Mountain Weather

CB Avalanche CenterWeather

Date: 11/30/2015

Our latest storm is just like the broncos. It just won’t quit. Or maybe its like a Broncos fan leaving the bar? This same wobbling low pressure system has been creating unsettled weather since last Thursday. Come this afternoon, it gets the boot into the upper Midwest. This exiting low pressure system will swing the winds to the northwest for one last shot of orogrpahics and cold air advection to wring the atmosphere over our high peaks from Kebler to Schofield passes for another few inches. Look for gusty winds near and above treelike to blow the new low density snow around, and bundle up. Windchills could be bitter.

Mountain Weather for 11/29

CB Avalanche CenterWeather

Date: 11/29/2015

With the center of this low pressure centered over Evanston, WY, we will see continued southwest winds across the Elk Mountains, which tends not to be our prime orographic snow producing direction. Although southwest flow is not ideal, this low pressure has a -30ºC cold core, which will bring some enhanced snowfall in the form of cold air advection over the higher terrain through most of the day with a stronger pulse of snowfall this morning, before exiting our region this evening. High pressure moves in for most the work week before another evolving storm rattles into our area around Friday or Saturday.

SE snowpack observations

CB Avalanche Center2015-16 Observations

Location: Paradise Divide Area
Date of Observation: 11/28/2015
Name: Evan Ross
Subject: SE snowpack observations
Aspect: South East
Elevation: 10,000-12,500
Weather: Scattered skys in the morning turned to few by mid day. Calm wind throughout the day.
Snowpack: 10-15cm of total storm snow, blown into about 30cm on the lee sides of terrain features from SW winds overnight. Even in blown in areas storm snow lacked any slab formation. Steep or extreme terrain had many small sloughs running on slick/hard old snow surfaces.

Dug 1st pit around 11,500ft on a SE aspect and didn’t find a slab throughout the whole snowpack. Snowpack consisted of new snow over crust, facet, crust, facet combinations. Dug 2nd pit on the crown of the 11/24 skier trigged avalanche on Agustata Mountain at 12,400ft. Profile below.

Due south aspects were warming up slightly, otherwise all snow surfaces appeared to stay cold.

Agusta-crown-11.28

Mountain Weather 11/28/15

CB Avalanche CenterWeather

Date: 11/28/2015

The cut-off low continues to hover over Utah, spinning weak energy and a chance for light snowfall into the Elk Mountains today. The system finally looks to exit towards the Great Plains on Sunday night, with increased snowfall into Monday. The rest of the week looks dry.

Quick afternoon weather ob

CB Avalanche Center2015-16 Observations

Location: Paradise Divide Area
Date of Observation: 11/27/2015
Name: Evan Ross
Subject: Quick afternoon weather ob
Aspect: East
Elevation: 10,000-11,000

Weather: The morning started out partly cloudy before skys became overcast by noon or observed with light snow showers. Skys started to break up in the late afternoon before light scattered showers redeveloped around 4pm. Winds were generally calm with a light southerly breeze at times.
Snowpack: Short tour due to flat light conditions. Total storm accumulations were in the 1-2″ range. Temperatures felt warm leading to moist/sticky new snow that was settling quickly.

Mountain Weather 11/27/15

CB Avalanche CenterWeather

Date: 11/27/2015

A closed low pressure system bobbling around to our West will continue to keep our area under southwest flow. This system lacks deep moisture, but enough moisture at the surface should allow a few scattered snowfall showers to pass through. Some enhanced lift will spin around the low pressure and pass up through Western Colorado later this afternoon and this evening. If the Central Mountains get a piece of this Vorticity, we’ll hopefully see some enhanced snowfall and pick up a couple inches of snow. For the weekend we’re likely to only see a few more light snow showers but the track of this closed low could still vary slightly and change that outcome. Moving into next week a ridge starts to build over the Western US and we’ll see dry weather move in.

Mountain Weather 11/26/`5

CB Avalanche CenterWeather

Date: 11/26/2015

There is a closed low hanging out to our west and wobbling around between Nevada and California. Its forcasted to get bogged down with thanksgiving affairs before heading North and East of Colorado later this weekend or early next week. Unfortunately for us Central Colorado isn’t in a favorable potion with this Closed Low through the entire period. So our mountains will see cloudy skys and likely only a few snow flurries as we head into the weekend. One thing of note is that weather models are notoriously bad at forecasting the wobbly destination of Closed Lows Pressure Systems. So we could hold out a small bit of hope that she wobbles her way into a more favorable position for central Colorado, then forcasted.

Mountain Weather 11/25/15

CB Avalanche CenterWeather

Date: 11/25/2015

The closed low has moved offshore and is stalling over the Great Basin. Another unseasonably warm day is in store for today, with thickening clouds and increasing winds ahead of the system. The low drags a cold front and weak band of snow showers across our mountains tonight, but isn’t bringing much moisture with it. Unsettled weather continues into the weekend.

Paradise Divide Area

CB Avalanche Center2015-16 Observations

Date of Observation: 11/24/2015
Name: Evan Ross
Aspect: East, South West, West
Elevation: 11,000-12,500

Avalanches: Noticed one avalanche between Mt treasure and Treasury that likely occurred during the natural cycle that happened during the week of 11/16. U-N-R2-D2-I. Wind loaded bowl on an East aspect at about 13,000ft.
Weather: Partly cloudy skys in the morning gave way to few clouds by mid-day. Ridgetop winds were light from the West. Temperatures felt sightly cooler then the previous days with snow surfaces on southerly slopes staying frozen or dry.
Snowpack: Steep Southerly slopes had a wafer thin crust from yesterdays warm temps and those snow surfaces remained frozen today. Most alpine northerly and westerly slopes were put through the sand blaster during the last wind event. Easterly and Southerly alpine slopes vary from nice creamy textured surfaces to firm hardslabs and windboard. No instabilities were observed while traveling but one snowpit on an easterly slope produced a propagating test result with the persistent slab that started forming on 11/16. Pit attached below.

U-N-R2-D2-I. Natural avalanche that likely occurred during the week of 11/16. Located between Mt Treasure and Treasury.
11.24.15

Mt. Owen Snowpack Update

CB Avalanche Center2015-16 Observations

Location: Kebler Pass Area
Date of Observation: 11/24/2015
Name: Dustin Eldridge
Subject: Mt. Owen Snowpack Update
Aspect: North, North East, East, South East, South
Elevation: 11,600

Avalanches: None witnessed.

Weather: Calm, clear and rather warm. 42 Farenheit at Kebler trailhead
Snowpack: Dug two pits around 11,600 feet in the basin between Purple and Owen.

First pit dug on ENE aspect. HS=60 cm. From the bottom, there was around 5cm of 1-3 mm facets with a deteriorating crust above, topped by 40 cm of 1mm and Fist hardness grains. This was topped by 10 cm of 4f windslab and capped with 5 cm of 1f/p wind crust. Crust either gave no penetration or in shallower areas your boot went all the way to the ground.

Snowpit 1

Snowpit 1

Second pit was dug less than 15 yards away on same feature, slightly higher elevation and slightly more N-facing. HS=140 cm and no boot pen. The top 5cm of the pack was Pencil hardness windslab with 1f-4f slab comprising the rest of the pack. Couldn’t find any depth hoar or faceted crystals on the bottom of the pack. No tests conducted unfortunately. Wouldn’t expect any results except maybe on the Crust/facet combo of the smaller pit. Surprised at the uniformity of this pit, some minor density changes but layering was difficult to find.
Snowpit 2

Snowpit 2