Mountain Weather March 25, 2018

CB Avalanche CenterWeather

Date: 03/25/2018

Today will begin mostly sunny and warm, but clouds will be on the increase this afternoon. Southwest flow will be in place in front of the next system that remains off the west coast. Temperatures should be slightly cooler than yesterday. As clouds build it may be possible for a few snowflakes to fall in the area especially to the north of town. Expect winds to increase throughout the day.

  • Today

    High Temperature: 35
    Winds/Direction: 10 to 20, Southwest
    Sky Cover: Increasing clouds
    Irwin Snow: 0 to 1
    Elkton Snow: 0 to 1
    Friend’s Hut Snow: 0 to 1

  • Tonight

    Low Temperature: 18
    Winds/Direction: 7 to 17, Southwest
    Sky Cover: Mostly Cloudy
    Irwin Snow: 0 to 1
    Elkton Snow: 0 to 1
    Friend’s Hut Snow: 0 to 1

  • Tomorrow

    High Temperature: 30
    Winds/Direction: 5 to 15, West Southwest
    Sky Cover: Mostly Cloudy
    Irwin Snow: 0 to 1
    Elkton Snow: 0 to 1
    Friend’s Hut Snow: 0 to 1

Opa Hut obs Saturday AM

CB Avalanche Center2017-18 Observations

Location: Brush Creek Area
Date of Observation: 03/24/2018
Name: Eric Murrow

Subject: Opa Hut obs Saturday AM
Aspect: North, North East, East, South East
Elevation: Above treeline

Avalanches:

Skier triggered several very small soft slabs on SE aspect near Taylor Pass on Friday afternoon. Saturday morning with clear visibility spotted multiple large avalanches above treeline; Crystal Peak, Star Peak, Taylor Peak, Tilton and Hunter hill. All were north through east aspects

Weather: Snow totals from Friday storm at treeline were 13.5” with 1.6”SWE. Moderate winds with strong gusts Friday. Mostly clear Saturday morning.
Snowpack:

Photos:

Slides above GT race course. PC:Chris Miller

Notice small yet deep slide lower right stepping into old layers. PC: Jason Holton

Exact repeat offender of slide from early March. PC: Jason Holton

Left overs from “The Dude”

CB Avalanche Center2017-18 Observations

Location: Crested Butte Area
Date of Observation: 03/24/2018
Name: Benjamin H Pritchett

Subject: Left overs from “The Dude”
Aspect: East, South East, South
Elevation: All above treeline

Avalanches:

Numerous, see photos. The pattern in this set of photos is that these all failed on shallowly buried crust facet combos on East to South aspects above treeline. See the recent video from Star Pass for details on the weak layer structure.

Weather:
Snowpack:

Photos:

PM avalanche observation

CB Avalanche Center2017-18 Observations

Location: Brush Creek Area
Date of Observation: 03/23/2018
Name: Ben Pritchett

Subject: PM avalanche observation
Aspect: North East
Elevation: Above Treeline

Avalanches:

5x on Whetstone, 3x reported off Crystal’s North Face.

Weather: Snowed all day in the Alpine. >S5 precipitation in numerous pulses. Big pulse around 11, another around 1 (frontal passage) then numerous convective cells throughout the afternoon. Report from Star Pass included <10′ visibility all day, with only a few breaks minutes long. Strong winds transporting significant snow.
Snowpack: Wet snowpack down low. Rain saturated snowpack below treeline with a 12+ hour deluge, dropping something in excess of .5″ of liquid precip. Storm slabs in the alpine with storm totals topping 20″ near Taylor Pass. Over 2″ SWE observed at Schofield. PM winds drifted snow continuously. Taylor Pass reported no cracking in the snow. Star Pass was unable to test the new snow as visibility didn’t allow forecasters to find the cornice lip, though they did report 3 fresh avalanches.

Photos:

Mountain Weather March 24, 2018

CB Avalanche CenterWeather

Date: 03/24/2018

“The Dude,” our name for the storm that lingered on the coast for a week, and rolled through the Elk Mountains yesterday, bowled a resounding strike. Schofield recorded 2.4″ of water and field team from the Grand Traverse reported close to two feet of new snow. In short, the crest of the Elk Mountains got pounded.
Temperatures dropped to the teens last night, but this morning the sun will crank the temps back above freezing quickly. By this afternoon, the increasing southwest winds will usher in high clouds ahead of a weak system clipping Colorado on Sunday.

  • Today

    High Temperature: 40
    Winds/Direction: 10 to 20, Southwest
    Sky Cover: Increasing clouds
    Irwin Snow: 0
    Elkton Snow: 0
    Friend’s Hut Snow: 0

  • Tonight

    Low Temperature: 20
    Winds/Direction: 10 to 20, Southwest
    Sky Cover: Mostly Cloudy
    Irwin Snow: 0
    Elkton Snow: 0
    Friend’s Hut Snow: 0

  • Tomorrow

    High Temperature: 35
    Winds/Direction: 20 to 30, Southwest
    Sky Cover: Mostly Cloudy
    Irwin Snow: 0 to 2″
    Elkton Snow: 0 to 2″
    Friend’s Hut Snow: 0 to 2″

Mountain Weather, March 23, 2018

CB Avalanche CenterWeather

Date: 03/23/2018

Last night, the National Weather Service described this storm as holding record-breaking levels of moisture for a late March storm. The hitch is that the storm lacks the uplift and cooling necessary to drive historic snowfall.
That said, a lot of water has fallen out of the sky and there’s more on the way this morning. Current snowfall totals above 11,000′ range from 6″ to 8″ as of 6am, but that snow contains over an inch of water, meaning it’s unusually dense snow. The highest precipitation rates of this storm are yet to come, with a rager of a blizzard this morning above treeline.
By early afternoon, the storm will taper off, just in time for a sharp uptick in Westerly winds for the afternoon.
The good news for the Grand Traversers is that tonight, the winds will die down, temperatures will cool, making for an incredibly pleasant ski running conditions. Given the high moisture content in this snow, don’t forget to wax your skins.

  • Today

    High Temperature: 32, falling throughout the day
    Winds/Direction: 20 to 30, gusting to 50 in the PM
    Sky Cover: Overcast
    Irwin Snow: 10″ to 12″
    Elkton Snow: 10″ to 12″
    Friend’s Hut Snow: 8″ to 10″

    In downtown Crested Butte, we’ll be lucky to pick up 2″ of dense snow.

  • Tonight

    Low Temperature: 10, colder above 12,000′
    Winds/Direction: 5 to 10, West
    Sky Cover: Partly Cloudy
    Irwin Snow: 0
    Elkton Snow: 0
    Friend’s Hut Snow: 0

  • Tomorrow

    High Temperature: 35
    Winds/Direction: 10 to 20, gusting to 30, Southwest
    Sky Cover: Mostly Cloudy
    Irwin Snow: 0
    Elkton Snow: 0
    Friend’s Hut Snow: 0

Mountain Weather March 22, 2018

CB Avalanche CenterWeather

Date: 03/22/2018

“The Dude,” our beloved closed low parked on the coast this last week, steps up to the lane to bowl his final frame over the next few days. Today into Friday it looks like he’s going to throw a spare, leaving a few pins standing until Monday when he’ll try to finish up with a final bowling ball of a closed low.
Warm southwest flow ushers in a heaping pile of moisture today, with little storm organization or lifting mechanisms required for significant precipitation. It’s not until tonight when a weak cold front arrives that we’ll see temperatures drop and bowling pins falling from the sky. Below 11,000′ there’s a good chance any precip will be rain.
Tonight and Tomorrow morning, the storm will rage above 12,000′ with the precipitation intensity rapidly diminishing at lower elevations. Across the CBAC forecast area, we’ll see huge variations in snowfall totals, with only a few wet inches in town and as much as two feet in isolated areas along the Elk Crest.  That variation will be due to both the convective nature of the storm, with strong isolated cells, and also the elevation gradient, where we’ll see much more snow up high.  For the GT folks, the models are showing about a foot for Star and Taylor passes, but the storm could exceed those numbers anywhere a convective thunder-cell pops. By mid-day Friday, the storm will taper off, leaving temps in the low 20’s and a light breeze for race night.

  • Today

    High Temperature: 40
    Winds/Direction: 5 to 15, Southwest
    Sky Cover: Overcast
    Irwin Snow: 0 to 2″
    Elkton Snow: 0 to 2″
    Friend’s Hut Snow: 0 to 2″

  • Tonight

    Low Temperature: 30
    Winds/Direction: 20 to 30, gusting to 50, Southwest
    Sky Cover: Overcast
    Irwin Snow: 5 to 8″
    Elkton Snow: 5 to 8″
    Friend’s Hut Snow: 5 to 8″

  • Tomorrow

    High Temperature: 35
    Winds/Direction: 20-30, gusting to 40 West Southwest
    Sky Cover: Overcast
    Irwin Snow: 6 to 8″
    Elkton Snow: 6 to 8″
    Friend’s Hut Snow: 6 to 8″

Mountain Weather March 21, 2018

CB Avalanche CenterWeather

Date: 03/21/2018

“The Dude,” the strong closed low that’s been parked over the Pacific for the last week, if preparing for the final bowling frame. The big question is will it be a strike, a spare, or a gutter ball.
Today will be warmer than the last couple days, but otherwise quite similar as the waning hours of the recent “dirty ridge” of high pressure passes overhead. Expect on and off clouds, moderate winds and temperatures climbing to above freezing at 11,000′, even a chance for a localized flurry or two over the high peaks.
By tonight, the ridge axis passes overhead, and the southwest flow in front of the Dude’s final approach begins to usher in warm air and significant moisture. Tomorrow the moisture and clouds arrive as a southern split off the main atmospheric river presently impacting the coast. Precipitation will begin as rain up to around 11,000′, transitioning to dense snow by tomorrow night. The main system will track to our north, so here in the Elk Mountains we’ll see swampy conditions with precipitation driven primarily by southwest orographics, which means the snowfall will be much greater in the high country than in town.
For you Grand Traverse-o-philes, the models are currently projecting storm totals by mid-day Friday of around 4″ of snow in town, 12″ at Star Pass and 10″ at Taylor Pass. Bring your glob-stopper and don’t expect to skate ski your way over the Elk Mountains.

  • Today

    High Temperature: 30
    Winds/Direction: 10 to 20, West
    Sky Cover: Overcast
    Irwin Snow: 0 to 1″
    Elkton Snow: 0 to 1″
    Friend’s Hut Snow: 0 to 1″

  • Tonight

    Low Temperature: 15
    Winds/Direction: 5 to 15, West
    Sky Cover: Overcast
    Irwin Snow: 0
    Elkton Snow: 0
    Friend’s Hut Snow: 0

  • Tomorrow

    High Temperature: 35
    Winds/Direction: 10 to 20, gusting to 30, West Southwest
    Sky Cover: Overcast
    Irwin Snow: 0 to 2″, starting as rain below 11,000′
    Elkton Snow: 0-2″, starting as rain below 11,000′
    Friend’s Hut Snow: 0-2″, starting as rain below 11,000′

Baldy Drifting

CB Avalanche Center2017-18 Observations

Location: Paradise Divide Area
Date of Observation: 03/20/2018
Name: Ben Pritchett

Subject: Baldy Continued Drifting
Aspect: North East, East, South East
Elevation: Near and Above Treeline

Avalanches:

none observed

Weather: Steady light gusting to moderate winds from the West. High temps in the mid 20’s. High thin overcast skies.
Snowpack: Recent drifts observed 1 to 3 feet thick. Cracking was localized to areas where the drifts were 1-finger hard or stiffer. Near treeline the drifts were quiet and soft, only becoming denser / stiffer and able to crack above treeline.

Slate River storm snow

CB Avalanche Center2017-18 Observations

Location: Paradise Divide Area
Date of Observation: 03/19/2018
Name: Eric Murrow

Subject: Slate River storm snow
Aspect: North, North East, East
Elevation: 8900′ – 10400′

Avalanches:

Many skiers and boarders out testing steep near and below treeline terrain on northerly slopes. Few very small skier triggered loose sloughs of little consequence, and one skier triggered, D2, storm slab avalanche on Schuylkill Ridge (documented in earlier ob). Numerous very small natural loose avalanches in new snow coming out of steep rocky cliff areas near and above treeline.

Weather: Partly cloudy skies with thicker cloud cover moving over the spine of Ruby Range. Light winds at below treeline elevations, vis of above treeline terrain was in and out, but observed no snow transport.
Snowpack: New snow accumulations were 3″ at Slate river TH and increased up 5″ at 10400′. Small isolated drifts below treeline were up to 9″ deep, but no cracking was observed. Terrain that faced NW – NE had dry snow underneath new snow but NE – E had 1-3cm sun crust below new snow (faceting was apparent below the crust, and could be a problem if a significant load is deposited in near future). Also of note – found graupel layer in drifted areas from Friday’s storm(3/16), CT’s produced moderate results on the graupel but no slab present above just low-density storm snow. Graupel layer was not widespread throughout below treeline northerlies limited to terrain features that were drifted after Friday’s storm on terrain features that were slightly tilted to the east.

Photos: