20 Apr 2020

April 20, 2020

     YESTERDAY:

    Unsettled weather early Sunday morning.

    A glimpse of the peak as the weather began to break in the early am.

    Clouds began to slowly dissipate.

    Snow beginning to melt on the lower mountain on South/West aspects.

    Large cumulus clouds in the afternoon.

    Sunday April 19, 2020. 15:00 Hrs. +16 at 660 m. +3.5 with a 10-20 SW wind at 1835 m.

    Satellite image from same timeframe as above image.

    Big picture Sunday afternoon.

    Dark clouds in the afternoon.

    Large cumulus clouds to the Southwest.


Weather Observations for April 20, 2020 taken at 06:00 Hrs.

2240 meters    0, Winds were calm KPH NNE--Horstman Hut
2180 meters  +1, Winds were 5-10 KPH N--Whistler Peak
1860 meters    0, Winds were    0-5 KPH SW --Rendezvous 
1835 meters    0, Winds were  5-10 KPH SW-Round House
1650 meters    0, 0 cm in 12 Hrs,   0 cm in 24 Hrs, Base 226 cm --Pig Alley
1560 meters  +1, 0 mm in 12 Hrs, 0 mm in 24 Hrs, Base 155 cm--Catskinner
  660 meters    0, Valley Temp, Max temp Yesterday was +4.0, 11.9 mm of precip yesterday.


   As of 07:00 Hrs we have a broken stratus cloud layer and unlimited visibility.



FORECAST:

Area still under the high pressure with a stratus layer this morning in a Northeasterly flow aloft.
Cloud should burn off quickly for sunny skies this am. The freezing level will remain at around 2300 meters today dropping back down to around 1600 meters on Tuesday. The flow will slowly switch to a Southwesterly as the low begins to push in. More cloud by the end of today with overcast skies by Tuesday morning. Periods of light precipitation by Tuesday afternoon into Wednesday morning.
Should see a break with unsettled weather Wednesday through Friday. A weak shortwave ridge is forecasted for Friday before a wet frontal band arrives for Saturday. Guesstimates: 0 mm by Tuesday morning, 1-4 mm by Wednesday morning, 1-2 mm by Thursday morning.


    GOES IR image from this am.


     High still in control but the low pushing down the coast will displace it.





    Fronts along thr coast.

     High being pushed South, weak front for Tuesday.





     Low now the dominant feature with a Westerly flow and moist cool weather. 


    AVALANCHE ACTIVITY:

    Some loose wet sluffs on Whistler, not much going on.

    Difficult to see up there at times.


    INFORMATION & OBSERVATIONS:

    Nice reflection in the am.

    Whistler course is closed to foot traffic.

    Bears are out and about.

    Relaxed swan.



Local Submissions:

No new submissions.


VIDEOS:

Unplug and Recharge: Pete Shoniker


ARTICLES:

No avalanche fatalities in South-Central Montana this season: Billings Gazette

Colorado Trails and Skiing Parking lots blocked due to high volume of cars: Summit County

Reducing SAR calls in B.C. during the pandemic: Medium.com

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