101/102(*) Open Trails Subject To “Weather Permitting” At #Tremblant .
Please Note: Soleil And Duncan Quad
Delayed Opening Due To -31 C Cold Weather.
Clinically Speaking, It’s Very Cold Outside...
We call it “Cryogenic” Snow Conditions
Due To The Unique And Distinct Skiing
Properties Of Natural Snow At These Temps.
- Cryogenic.Merriam.Webster.Dictionary.Definition.a.jpg (108.93 KiB) Viewed 2132 times
So what happens with cryogenic snow is that at around and below
the -30C mark, the glide characteristics of natural snow change
under the running edges of skis or snowboards due to the inability
to develop the molecular thin layer of lubricating water that normally
occurs between passing metal edges over the snow surface.
In this way, the snow can feel and act like sand underfoot. This
will generally be perceived as a very dry friction that will inhibit
descent speed to variable rates that are directly proportional to
pitch angle.
This phenomenon immediately renders steeper slopes easier
due to a automatic reduction in the comparative natural speed
you are used to in more normal Sub-Zero C’s operating temp’s.
Simultaneously it may actually make gentle slope angles feel
very slow to the point of needing specific pushing actions
due to the reduced effect of gravity that has been offset by
high levels of ambient friction.
Due to convection, i.e., cold sinks and heat rises, this effect
can continue on for bit, even after the air temps rise somewhat
as the cold has sunk into the surfaces to the point that it takes
a while for rising ambient air temps to actually influence the
surfaces.
- 2.25.23.Weather.Conditions.Observations.At.2.55.AM.a.jpg (1013.41 KiB) Viewed 2133 times
Weather Notes:
There is some probability, in our opinion maybe even
a great chance, that this will be the last time we see
a -30 C number at sunrise for the remainder of the
season.
As we have previously pointed out, a look at the historic
30 year daily average temps shows this to be a most
unusually deep cold snap for this time of the year.
Statistically, the odd’s are we won’t see it repeated.
- 2.25.23.Weather.Data.a.jpg (930.66 KiB) Viewed 2133 times
Conditions Notes:
------- Conditions Caveat: ----------
Use extreme caution with small children
and all those sensitive to very cold temp's.
Defer outdoor attendance until air temps
rise to practical working levels suitably
matched to safe exposure time.
-----------------------
Besides the obvious challenges of personal human comfort
working outdoors in very cold conditions, there are unique
opportunities to explore for all aspiring skill level builders
beyond absolute Beginners because of the assisted ease
of steep slope navigation with automatic speed control of
the high friction rates of cryogenic snow.
Suddenly, slopes that you might never think of going
on, become super-easy. The “Run-Away” hazard of
gravity that would normally be there has been replaced
by this dry sand-like friction, and that is holding you back
against the slope angle in a way that allows you to execute
control moves for turning and braking with ease in what
seems like a whole new “Slow-Motion” paradigm.
It’s both a bit spooky and fun at the same time because
there is a fundamental difference in the way you are experiencing
the laws of physics that is vastly different to what you are
functionally used to.
We would estimate that with the current hourly temp forecast,
there should be a return to more normal descent performance
somewhere between 10:30 and 11:30 A.M. At that point, the
day evolves towards just being really cool instead of being really
frigid. You may notice lingering cryo-effects on the Nord/North
Side up until noon or so.
-------------- 12:05 P.M. Insert Update: ----------------
Please Note: For a late Feb. Saturday the attendance is light.
There are at least two possibilities that may be that a) this
weekend is exempt from the regional bundled lift pass,
b) the cold does influence attendance to variable degrees.
2.25.23.Weather.Conditions.Observations.At.12.05.PM.a.jpg
- 2.25.23.Weather.Conditions.Observations.At.12.05.PM.a.jpg (1.29 MiB) Viewed 2000 times
---------------------------------------------
101/102(*) Open Trails on the Archival Copy of Official Open
Trails, Grooming, Snowmaking, Lift Status and Mountain Conditions
for February 25, 2023, Courtesy of Tremblant.ca
- Archival Copy of Official Open
Trails, Grooming, Snowmaking, Lift Status and Mountain Conditions Courtesy of Tremblant.ca - 2.25.23.Trail.Status.Data.a.jpg (686.21 KiB) Viewed 2133 times
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