8 May 2017

May 8, 2017


    Old avalanche debris on Mount Davidson.

    Slough from new snow on Prime Rib.

    Debris in Lakeside Bowl from last Thursday.                                                Wendell Moore Image


    Awesome clear morning Sunday May 7, 2017.

    Soft snow conditions at the bottom of the mountain.

    Firm conditions mid mountain that did eventually soften to become great spring skiing.

    Sunday morning 07:45 Hours.

    Clouds began to roll in just before noon.

    Cloudy in the afternoon.

    Cloud cover kept the Spring skiing nice all day.

    Mount Currie Sunday afternoon.
    Just before sunset Sunday evening.

Weather Observations for May 8, 2017 taken at 06:00 Hours.

2240 meters      -4, Winds were 20-30 KPH S--Horstman Hut 
1860 meters      -2, Winds were 10-20 KPH S--Rendevous
1550 meters     +1, 0 cm of new snow, 0 cm in 24 hrs, 227 cm Base, RH 80%  --Catskinner 
  660 meters     +3, Valley Temp, Max Temp Yesterday was +14.4, 0.0 mm of Precip recorded yest

   As of 07:00 Hrs this am we have high overcast and unlimited visibility.


The ridge of high pressure will weaken today as an approaching upper level shortwave trough in a Westerly flow aloft brings high cloud into the area. The air mass is fairly warm with the FL spiking at around 2400 meters this afternoon and there is the chance of some isolated intermittent showers. The ridge rebuilds for Tuesday with a mix of sun and some lingering cloud. The FL will again rise to around 2500 meters on Tuesday afternoon. An upper low moving South out of the Gulf of Alaska will bring unsetled conditions for Wednesday with periods of rain and a good chance of some breaks mid day. The air mass will be warm with the FL rising as high as 2800 meters Wedesday afternoon. A cool wet frontal band will push through on Thursday with moderate rain and the FL dropping from 2500 meters in the morning to 1500 meters by Thursday night. We could see 15-25 mm of rain during the day with 2-4 cm of snow by Friday morning. A cooler airmas on Friday will likely bring snow to the alpine above 1500 meters.

Guesstimates: 1-5 mm by Tuesday morning, 0 mm by Wednesday morning, 2-4 mm by Thursday morning, 15-25 mm on Thursday with 2-6 cm by Friday morning.

    GOES IR image for this am. High cloud but dry.

    Mostly cloudy today.

    Weak cold front in an upper level shortwave trough disipates before reaching our zone.

    Westerly flow aloft for today, with high cloud cover.

    Ridge rebuilds for Tuesday with a mix of sun and cloud.

    Flow Monday through Thursday.

    Low will send cloud and showers our way for Wednesday. FL could reach 2800 meters.

    Low will slide in from the North on Wednesday then move down the coast Thursday.


Hi Wayne

Sunday photo of a rather impressive set of avalanches on the east facing slope below Cypress Peak (along a familiar winter ski / summer scramble route towards the summit). Presumably natural activity from last Thursday or Friday. The large intact cornices remain looming.

Thanks for another season of excellent avalanche information,

Lawrence McIntosh

    Mogul Skiers on Springboard.

    Watch for rocks on Glacier drive.

    Deterorating ground with warm and cold temperatures.

    Powder on Horstman Glacier Sunday morning.

    Horstman Creek coming back to life after a cold winter.

    Old pinwheeling.

    Road has been plowed to the Roundhouse.


DOT bombs Independence Pass: Colorado

Exploring Climate change on a Sailboat: A 17 Year Odyssey

Wind Shear--When the Atmosphere seems to be tearing itself apart: Cliff Mass Weather Blog

No comments:

Post a Comment