9 Mar 2017

March 9, 2017



    AVALANCHE ACTIVITY:

    3 Dutch snowboarders dead after an avalanche in France-story in articles below.                 Net Pic

    Skier killed in off piste avalanche in Hautes Alps, France-story below.                           Net Pic


    Avalauncher Hole. Locally avalanche control produced numerous Sz 1 soft slabs Xe Sc yesterday.


    YESTERDAY:

    Sunrise Wednesday March 8, 2017.

    Awesome morning.

    Convective clouds preceded the weak front.

    Dust on Cord.


    Wednesday Morning

    Deeper snow off piste.

    Front moved in fairly quickly later in the am.


    12:30 Wednesday afternoon.

    Overcast in the afternoon.

    Snowing in the afternoon.

    Snow is very nice at this time.




Weather Observations for March 9, 2017: taken at 06:00 Hours.

2240 meters      -14, Winds were 15-20 KPH SE--Horstman Hut 
2180 meters      -11, Winds were 20-25 KPH SE  --Whistler Peak
1860 meters      -13, Winds were 10-15 KPH SE--Rendevous
1835 meters      -11, Winds were 15-20 KPH SE--Roundhouse
1650 meters      -12, 3 cm of new snow, 3 cm in 24 hrs, 291 cm Base, RH 91%  --Pig Alley
1550 meters      -12, 2 cm of new snow, 3 cm in 24 hrs, 207 cm Base, RH 88%  --Catskinner 
  660 meters        -5, Valley Temp, Max Temp Yesterday was + 3.0, 0/3 mm of Precip recorded yest


   As of 07:00 hrs this am we have broken cloud and unlimited visibility.


FORECAST:

A weak upper trough will bring unsettled weather this morning and flurries this pm in a Westerly flow aloft. The FL will slowly rise to about 1000 meters by tonight. A strong surface low will reach land this evening with moderate precipitation and strong winds. There is a chance all the moisture could go South or we may be in for a surprise tomorrow morning. The low will weaken Friday as it moves east. Unfortunately a warmer air mass is associated with the next series of frontal bands expected to move through our zone into next week. The FL on Friday morning will rise to 1500 meters then slowly descend to 800 meters by the evening. A weak cold front will move through on Saturday with a rising FL and light snow above 1000 meters. More warm frontal bands for Sunday into Wednesday. Guesstimates: 10-15 cm by Friday morning, 5-10 by Saturday morning, 5-10 by Sunday morning.



    GOES IR image for this am.

    Warm air mass with some moisture heading our way.

   Looking like it will miss us this am.

    Most of the moisture is tracking South.

   Strong surface low will move through tonight into Friday morning.

   More snow Saturday.


    Frontal bands Sunday into Monday.





OBSERVATIONS & INFORMATION:

   Hoar frost

   Looks like surface hoar growing on the rope and bamboo.

    Multiple crystals.

    Wind affect in some aspects in the alpine.


ARTICLES:

3 Snowboarders succumb to an avalanche in Valfrejus: France

Skier killed in off piste avalanche in Hautes Alps: France

Update on Heli-Skiing avalanche death near Revelstoke: Powder Canada

WDOT fears avalanche danger at Mountain Passes with next storm cycle: Washington State

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