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EXPIRED ON February 17, 2013 @ 1:34 amPublished on February 16, 2013 @ 1:34 am
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Issued by
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Overall, avalanches are unlikely today in the forecast area. A variety of conditions will can be found out there with most areas trending on the firm side. Wind slabs have bonded well to the widespread crust layer and are not a concern. A thick layer of facets still exists below our thick crust, however we do not have any slabs above this layer from our observations. With plentiful sunshine, any southerly aspect should warm nicely and any instability will be limited to roller balls during the warmest portion of the day. Other aspects from the top 180 degrees of the compass will remain firm and funky!
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.
Forecast Hotline: (530) 926-9613
Below Treeline is the lowest of three elevation bands used in the advisories. It extends from valley floors or snowline to Near Treeline. Open areas and sparse trees are possible. Snowfall tends to be less than the other elevation bands. Tree cover shelters the snow from wind effects.
×Near Treeline is the middle of the three elevation bands used in the advisories. It is a transition zone between dense forests and treeless alpine areas. It is the narrowest of the three elevation bands, extending only a few hundred feet above and below the treeline. It varies locally, and is not a constant elevation or width.
×Above Treeline is the highest of the three elevation bands used in the advisories. It includes alpine areas where the most snow falls and the winds are the strongest. It is not an exact elevation, but a characteristic of the terrain, beginning as the treeline transitions into open slopes extending to ridges and the tops of the highest peaks.
×North American Avalanche Danger Scale
Avalanche danger is determined by the likelihood, size and distribution of avalanches.
Watch for signs of unstable snow such as recent avalanches, cracking in the snow, and audible collapsing. Avoid traveling on or under similar slopes.
Safe backcountry travel requires training and experience. You control your own risk by choosing where, when and how you travel.
North American Avalanche Danger Scale
Avalanche danger is determined by the likelihood, size and distribution of avalanches.
Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
Natural and human-triggered avalanches unlikely.
Small avalanches in isolated areas or extreme terrain.
Safe backcountry travel requires training and experience. You control your own risk by choosing where, when and how you travel.
North American Avalanche Danger Scale
Avalanche danger is determined by the likelihood, size and distribution of avalanches.
Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
Natural avalanches unlikely; human-triggered avalanches possible.
Small avalanches in specific areas; or large avalanches in isolated areas.
Safe backcountry travel requires training and experience. You control your own risk by choosing where, when and how you travel.
North American Avalanche Danger Scale
Avalanche danger is determined by the likelihood, size and distribution of avalanches.
Dangerous avalanche conditions. Careful snowpack evaluation, cautious route-finding and conservative decision making essential.
Natural avalanches possible; human triggered avalanches likely.
Small avalanches in many areas; or large avalanches in specific areas; or very large avalanches in isolated areas.
Safe backcountry travel requires training and experience. You control your own risk by choosing where, when and how you travel.
North American Avalanche Danger Scale
Avalanche danger is determined by the likelihood, size and distribution of avalanches.
Very dangerous avalanche conditions. Travel in avalanche terrain not recommended.
Natural avalanches likely; human-triggered avalanches very likely.
Large avalanches in many areas; or very large avalanches in specific areas.
Safe backcountry travel requires training and experience. You control your own risk by choosing where, when and how you travel.
North American Avalanche Danger Scale
Avalanche danger is determined by the likelihood, size and distribution of avalanches.
Avoid all avalanche terrain.
Natural and human-triggered avalanches certain.
Large to very large avalanches in many areas.
Safe backcountry travel requires training and experience. You control your own risk by choosing where, when and how you travel.
Avalanche Problem 1: Wind Slab
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Character
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Aspect/Elevation
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Likelihood
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Certain
Very Likely
Likely
Possible
Unlikely
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Size
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Historic
Very Large
Large
Small
Problem: Wind slabs in isolated areas / pockets of extreme terrain
Size and Character: Wind slabs could be small to medium in size, hard, blocky
Sensitivity to Triggering: Wind slabs will be unreactive to trigger today
Recent Observations
Weather Observations (last 24 hours): In Mt. Shasta City at 0500, we have clear skies and a current temperature of 28 F.
On Mt. Shasta: In the Old Ski Bowl (7,600') on the south side of Mt. Shasta, we have a current temperature of 34 F. Snow on the ground totals 97" inches with no new snow and little settlement. Temperatures have ranged from 27 F to 47 F in the last 24 hours. At Grey Butte (8,000') on the south side of Mt. Shasta winds averaged 15 mph from the ENE with a max gust of 49 from the E. The current temperature is 32 F and temps have ranged 30 F to 39 F.
Castle/Mt. Eddy: Castle Lake - Castle Lake is hosting a current temp of 37 F. In the last 24 hours temperatures have ranged from 29 F to 40 F. Snow depth measures 45" inches with no new snow and little settlement. On Mt Eddy, we have 61" inches of snow with no new snow and little settlement. The current temperature reads 32 F with temps ranging from 31 F to 39 F in the last 24 hours. Winds have been SE, averaging 2 mph and gusting to 11 mph from the SE.
Weather and Current Conditions
SXUS46 KMFR 151100
RECMFR
FORECAST FOR MOUNT SHASTA RECREATIONAL AREA
NATIONAL WEATHER SERVICE MEDFORD, OR
300 AM PST FRI FEB 15 2013
CAZ082-160400-
SOUTH CENTRAL SISKIYOU COUNTY-
300 AM PST FRI FEB 15 2013
.TODAY...SUNNY. HIGHS IN THE LOWER TO MID 50S. SOUTHEAST WINDS
5 TO 10 MPH.
.TONIGHT...MOSTLY CLEAR. LOWS IN THE MID 20S TO MID 30S. SOUTH
WINDS 5 TO 10 MPH.
.SATURDAY...PARTLY CLOUDY. HIGHS IN THE LOWER TO MID 50S. LIGHT
WINDS BECOMING WEST AROUND 5 MPH IN THE AFTERNOON.
.SATURDAY NIGHT...PARTLY CLOUDY IN THE EVENING THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE MID 20S TO LOWER 30S.
.SUNDAY...COOLER. SUNNY IN THE MORNING THEN BECOMING PARTLY
CLOUDY. HIGHS IN THE LOWER TO MID 40S.
.EXTENDED...
.WASHINGTONS BIRTHDAY...MOSTLY CLOUDY. CHANCE OF SNOW IN THE
AFTERNOON AND EVENING. LOWS IN THE 20S. HIGHS 35 TO 45.
.TUESDAY...SNOW SHOWERS. LOWS 15 TO 25. HIGHS 25 TO 35.
.WEDNESDAY...MOSTLY CLOUDY. SNOW SHOWERS LIKELY...THEN CHANCE OF
SNOW SHOWERS IN THE AFTERNOON AND EVENING. LOWS 15 TO 25. HIGHS
25 TO 35.
.THURSDAY...MOSTLY CLOUDY. CHANCE OF SNOW SHOWERS...THEN CHANCE
OF SNOW IN THE AFTERNOON AND EVENING. LOWS 15 TO 25. HIGHS 25 TO
35.
&&
TODAY TEMPERATURE / WIND (MPH)
6000 FEET 47 / SW 10
10000 FEET 34 / SW 15
14000 FEET 21 / SW 25
SNOW LEVEL FORECAST
TODAY............9500 FEET.
TONIGHT..........9500 FEET.
SATURDAY.........8000 FEET.
SATURDAY NIGHT...6000 FEET.
SUNDAY...........4500 FEET.
THIS PRODUCT IS ISSUED ONCE A DAY. FOR THE LATEST INFORMATION
CHECK THE MORE RECENT FORECAST FOR SOUTH CENTRAL SISKIYOU COUNTY
CURRENT CONDITIONS at Bunny Flat (6950 ft)
| 0600 temperature: |
34 |
| Max. temperature in the last 24 hours: |
47 |
| Average wind direction during the last 24 hours: |
ENE |
| Average wind speed during the last 24 hours: |
15 mi/hr |
| Maximum wind gust in the last 24 hours: |
49 mi/hr |
| New snowfall in the last 24 hours: |
0 inches |
| Total snow depth: |
97 inches |
Disclaimer
This advisory does not apply to Ski Areas or Highways and is for the Mt. Shasta, Castle Lake and Mt. Eddy back country. Use this information for guidance only. You may find different conditions in the back country and should travel accordingly. This advisory expires on midnight of the date it was posted unless otherwise noted.
