25th Annual Black Diamond Fall Fundraising Party
Thursday, September 13; 6:00-10:00 PM; Black Diamond Parking Lot
25th Annual Black Diamond Fall Fundraising Party
Thursday, September 13; 6:00-10:00 PM; Black Diamond Parking Lot
Advisory: Provo Area Mountains | Issued by Drew Hardesty for Saturday - January 14, 2017 - 7:24am |
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current conditions Severe clear. Winds are light from the south. Mountain temps are in the mid 20s. Skiing and riding conditions are nothing less than phenomenal. Rough storm totals since last Saturday night and totals since New Years Upper LCC: 37"/4.48"................. 72"/6.90".................... Total snow depths are 80-90" Upper BCC: 46"/4.78"............... 103"/8.46".................... Total snow depths are 80-95" PC ridgeline: 41"/4.70"............... 80"/7.4" ..................... Total snow depths are 75-85" Ogden 27"/2.5"-62"/7.95"............ 46"/3.71-83"/10.23.............. Total snow depths are 80-100" Provo 35"/3.19" ....................... 67"/5.79" ................. Total snow depths are 80-120" |
recent activity No reports of avalanche activity in the Provo backcountry or from Sundance; however, explosive testing in uncompacted terrain in upper Big Cottonwood yielded a 4-6' deep and 100' wide hard slab on a very steep and rocky east facing slope at 10,300'. Preliminary report of Wednesday's accident in the western Uintas can be found here. |
type | aspect/elevation | characteristics |
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LIKELIHOOD
LIKELY
UNLIKELY
SIZE
LARGE
SMALL
TREND
INCREASING DANGER
SAME
DECREASING DANGER
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description
Maritime. The storm and wind slab instabilities are rapidly healing but may still be triggered with heavy loads. I see three problematic scenarios:
Hot Tip: Give the cornices a wide berth, put only one person on the steep slope at at time, and avoid the steepest sunlit terrain by late morning. |
type | aspect/elevation | characteristics |
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LIKELIHOOD
LIKELY
UNLIKELY
SIZE
LARGE
SMALL
TREND
INCREASING DANGER
SAME
DECREASING DANGER
|
description
Out of towners and those from higher latitudes often underestimate the intensity of the solar radiation in Utah. Today's direct sun and heating will foster unstable conditions on the steepest south facing terrain today. While we're not seeing a rapid rise in temperature on very low density snow, I do feel that the direct sun will allow the storm snow to become damp, unstable and ripe for human triggering in the sunlit terrain and the low elevations on the north side of the compass. Rollerballs, pinwheels, and natural sluffs are key indicators for transitioning dry to wet snow. Those entering steep, confined south facing terrain in the afternoon are likely to create decent dry to wet avalanche debris piles in the runouts below. Hot Tip: Continually change terrain to seek "cooler" aspects (eg: east to south to west) that haven't seen the prolonged heating and direct sun...or avoid the steep sunlit aspects altogether. |
type | aspect/elevation | characteristics |
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LIKELIHOOD
LIKELY
UNLIKELY
SIZE
LARGE
SMALL
TREND
INCREASING DANGER
SAME
DECREASING DANGER
|
description
There remains some uncertainty about the snowpack structure below roughly 8000' involving a facet/crust layer from mid December. Diligent snow pit testing should provide good indication of how well this layer is healing. The Ogden area mountains had a very active avalanche cycle on this layering 3 days ago; the Provo mountains over a week ago. Collapsing and cracking are indicators of instability here. Hot Tip: Use snowpits to determine the extent of this layering or remain on lower angle slopes at these elevations. |
weather We'll have sunny skies, light southerly winds, and temps rising to the low 20s at 10,000', the mid 30s at 8000'. This will be our first break in the storms since New Year. We're in a bit of a break until about mid week. |
general announcements
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