7 Apr 2015

April 7, 2015


    Two Swiss Ski Tourers found dead in an avalanche in Val Formazza, Italy; story below.  Net Pic

    First light Monday morning, clouds dissipated for blue bird in the morning.

    Clouds were just South of the Whistler area.

    Mt Fee early Monday April 6, 2015.

    Clouds began to develop around 10:30 yesterday morning.

    By noon there were some isolated convective showers.

    Showers in the valley mid afternoon.

    Some very large convective cloud development Monday aft. Hail in the valley around 15:00.



Weather Observations for April 7, 2015; taken at 06:00 Hours.

2240 meters      -7, Winds were 10-25 KPH from the E
2180 meters     - 5, Winds were 5-15 KPH from the SE
1860 meters      -4, Winds were 10-15 KPH from the ENE
1835 meters      -4, Winds were 0-5 KPH from the ESE
1650 meters      -5, No new snow, Base 182 cm
1550 meters      -3, No new snow,  Base 135 cm, Relative Humidity 80%. 
  660 meters      -2, Valley Temp, Max Temp Yesterday was +12.8.

   As of 07:00 Hours we have some scattered cloud and unlimited visibility. Put the sun screen on!!



For the forecast, the low to our South is still churning some high scattered cloud into our area early this morning in a Southerly flow aloft. The high will strengthen throughout the day bringing sunny conditions through Thursday with freezing levels rising each day topping out at 2000+ meters by Thursday afternoon. A vigorous cold front moves onshore Friday afternoon with moderate to heavy precipitation, strong winds in the alpine and freezing levels dropping to the valley floor Friday night. The front will also bring light to moderate precipitation to the mountains on Saturday with the FL rising to 900 meters during the day and dropping to the valley by Saturday evening in a Westerly flow. At this time Sunday may be unsettled but some models have another cold front moving into the area early next week with slightly warmer temperatures pre front and cooler temperatures post front. More on that as we get closer and there is better agreement in  the models.  Guesstimates: 20-25 cm by Saturday morning, 10-15 cm by Sunday morning. Winter is back!!


    Low slowed down and is still off the Coast of Oregon.

    High scattered cloud early Tuesday morning, possible convective cloud development later today.

    Still some cloud to our South Tuesday.

    High pressure strengthens during the day.

    Sunny weather for the next couple of days with warm temperatures.

    Thursday with the cold front approaching.

    Cold front arrives Friday afternoon into Saturday.


ARTICLES:

Spring Conditions--Daily Melt Freeze Cycles: Avalanche Canada

Two Swiss Ski Mountaineers found dead: Swept away by an avalanche

Effectiveness of Avalanche Airbags: NASAS

Anticipating Point Release Avalanches: Mountain Skills


    Satellite image from yesterday at noon.

    Big picture yesterday at noon.

    Solar induced Point releases from Sunday on Mount Currie.

    Still making snow on Blackcomb.

    Green lake early Monday morning.

    Male and Female Greater Scaup, Alpha Lake. April 6, 2015

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