You are here

Avalanche Advisory for 2018-02-07 05:56

  • EXPIRED ON February 8, 2018 @ 5:56 am
    Published on February 7, 2018 @ 5:56 am
  • Issued by Aaron Beverly - Mount Shasta Avalanche Center

Avalanche danger is LOW. Avalanches are unlikely and NORMAL CAUTION is advised. Shallow snowpack hazards exist. Beware of falling rime ice above 9500 ft.

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Avalanche Problem 1: Normal Caution

  • Character ?
  • Aspect/Elevation ?
  • Likelihood ?
    Certain
    Very Likely
    Likely
    Possible
    Unlikely
  • Size ?
    Historic
    Very Large
    Large
    Small

NORMAL CAUTION means:

  • Watch for isolated slabs.
  • Ski and ride one at a time in avalanche terrain.
  • Don't regroup in run out zones.
  • Basic avalanche rescue skills are essential in avalanche terrain.

Isolated slabs are related to wind and terrain. Look for places where small areas of drifting have occurred and firm layers of surface snow overlie softer layers. This will occur on the lee side of ridges, in terrain depressions, on convex terrain features, and in the lee of isolated bands of trees

Advisory Discussion

Falling rime ice is a concern above 9500 ft. Firm snow surfaces exist. Wear a helmet and bring an ice axe, crampons, and the knowledge to use them if traveling on steep terrain.

Recent Observations

Temperatures dipped below freezing last night. East winds above treeline were light. Skiers reported favorable conditions above 8000 ft. Below treeline, the snowpack is thin and sparse. The upper Sand Flat cross country trail has usable snow.

Weather and Current Conditions

Weather Summary

Expect warm and dry conditions for another week. The high pressure area may move far enough off the coast to swing moisture into the area towards the end of next week. Keep hope alive.

24 Hour Weather Station Data @ 6:00 AM

Weather Station Temp (°F) Wind (mi/hr) Snow (in) Comments
Cur Min Max Avg Avg Max Gust Dir Depth New Water Equivalent Settlement
Mt. Shasta City (3540 ft) 33 32 57 42.5 4 N
Sand Flat (6750 ft) 30 29 44 35 20 0 0 1
Ski Bowl (7600 ft) 38 30.5 45.5 38.5 40 0 0 1.5
Gray Butte (8000 ft) 39 31 42 38 7 25 ENE
Castle Lake (5870 ft) 40.5 34 43.5 39 8.5 0 0
Mount Eddy (6509 ft) 36 33 44 40 2 12 SSE 19.5 0 0
Ash Creek Bowl (7250 ft) 0 0 0 0 0 0 0 station down
Ash Creek Ridge (7895 ft) 0 0 0 0 0 0 station down

Two Day Mountain Weather Forecast

Produced in partnership with the Medford NWS

For 7000 ft to 9000 ft
  Wednesday Wednesday Night Thursday
Weather Sunny. Clear. Sunny.
Temperature (°F) 58 39 59
Wind Direction NE NE NW
Wind Speed (mi/hr) 5 mi/hr 5 mi/hr 5-10 mi/hr
Expected Snowfall (in) 0 0 0
For 9000 ft to 11000 ft
  Wednesday Wednesday Night Thursday
Weather Sunny and breezy. Clear. Sunny.
Temperature (°F) 37 36 36
Wind Direction NE N NW
Wind Speed (mi/hr) 10-15 mi/hr 10-15 mi/hr 15-20 mi/hr
Expected Snowfall (in) 0 0 0

Season Precipitation for Mount Shasta City

Period Measured (in) Normal (in) Percent of Normal (%)
From Oct 1, 2017 (the wet season) 10.11 22.75 44
Month to Date (since Nov 1, 2018) 0.00 0.48 0
Year to Date (since Jan 1, 2018) 4.28 7.54 57

Disclaimer

This advisory does not apply to Ski Areas or Highways and is for the Mount Shasta, Castle Lake and Mount Eddy backcountry. Use this information for guidance only. You may find different conditions in the backcountry and should travel accordingly. This advisory expires on midnight of the date it was posted unless otherwise noted.