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Below and Near Treeline on Mt Shasta

Location Name: 
Mount Shasta
Region: 
Mt. Shasta
Date and time of observation: 
Wed, 03/27/2019 - 4:00pm
Observation made by: 
Forecaster
Red Flags: 
Recent loading by new snow, wind, or rain

Location Map

96067 Mount Shasta , CA
United States
41° 21' 55.9008" N, 122° 12' 25.0884" W
California US

Snowpack Observations

Details

3.27.19 - 1600 hrs - Meyers

Near Treeline, Top of T-Bar

8,000 feet - East - 21 degrees

SKY: Obscured 100%, patches of blue sky in between showers

PRECIP: S - 1, showery, periods of heavy snowfall

BLOWING SNOW: None at location. Gusty over exposed terrain. Very little wind impacts below/near treeline. Above treeline poor visibility limited observations/access.

AIR: 30.5 F at 1600

BOOT PEN: 15 inches

HS: 184 inches

HN: 10-12 inches

WIND: Calm to light, southwest

Photos

Weather Observations

Details

Snow started to fall at 2300 on the evening of the 26th and did not stop for 14 hours. New snow totals of 10-12 inches was observed at Bunny Flat and in the Old Ski Bowl. On the west side, Castle Lake and Eddies, about half that was recorded by weather stations. Snowmobile grooming operations out on the east side, Medicine Lake area, observed upwards of 2 feet of new snow!  These snow totals typified the storm...very localized, showery conditions with periods of heavy snow, isolated to specific areas. One minute hosted partial clearing with blue sky donut holes, the next a complete whiteout and snowing. A late afternoon tour on the south side of the big hill did not show any glaring instabilities, however visibility was tough. Our wind forecast completely duped us. While Gray Butte recorded 14 mi/hr average speeds with gusts to 37 mi/hr ranging from S/SW to W/NW, on the snow observations revealed little in wind effect.  Uncertainty exists higher on the mountain where conditions could be different in terrain exposed to wind. Snowpit tests were inconclusive below and near treeline. Small tests slopes were unreactive.  Snow surfaces were smooth and soft with poor slab properties. An unconfirmed wind slab avalanche near the top of Sun Bowl was thought to have been observed (poor visibility).

Statistics

Cloud Cover: 
100% of the sky covered by clouds
Blowing Snow: 
No
Precipitation: 
Snow
Accumulation rate: 
Less than 1 in. per hour
Air temperature: 
Below Freezing
Air temperature trend: 
Cooling
Wind Speed: 
Calm
Wind Direction: 
Southwest