Know the signs of windslab. Windslab sitting over sugar snow is dangerous.
Above 2,500ft Moderate
1,800 to 2,500ft Low
Below 1,800ft Low
Degrees of Avalanche Danger ?
|SATURDAY||SUNDAY||MONDAY & TUESDAY|
Elevation: Above 2000 feet elevation
Aspect: South and west
Terrain: All terrain exposed to wind
Likelihood (Human Triggered): Possible
Size: Small – Large
Danger Trend: Increasing
Forecaster Confidence: Fair
AVALANCHE PROBLEM SCALE DESCRIPTORS:
Sensitivity: Non-reactive, Stubborn, Responsive, Touchy
Distribution: Isolated, Specific, Widespread
Likelihood: Unlikely, Possible, Likely, Nearly Certain
Size: Small, Large, Very Large (size scale <here>)
Danger Trend: Increasing, Steady, Decreasing
Forecaster Confidence: Good, Fair, Poor
LIST OF AVALANCHE PROBLEMS <here>
Continental Snow Climate Zone: Sugar snow at the bottom of the snowpack, also known as depth hoar or basal facets, remains the concern. There’s been reports of whumphing, the settling of the entire snowpack with the additional weight of a human.
Find more photos and observations at the bottom of the page. Sharing your observations creates an informed community that everyone benefits from at some point.
Recent Avalanche Activity
Continental Snow Climate Zone:
- No new observations.
|WEATHER FORECAST for NEXT 24 HRS at 3,000 ft:|
|Temperature Forecast (Min/Max *F):||-5 / 10|
|Ridgetop Wind Forecast (direction/mph):||NE / 30-45|
|WIND & TEMPERATURE
PAST 24 hours
|Ferry Terminal||Thompson Pass|
|Average Wind Speed (mph) / Direction||8 / NE||28 / NE|
|Max Wind Gust (mph) / Direction||20 / NE||45 / NE|
|Temperature Min / Max (*F)||18 / 23||-5 / 10|
Weather Forecast: Starting out Saturday with overcast and flat light with the sun poking out Saturday afternoon. Cold and windy with significant wind chill where exposed. Snowflakes Sunday accumuating above the freezing level to a foot Monday, another foot and a half Tuesday, for a storm total of three and a half feet by the end of Thursday. Good chance of rain in town Monday and Tuesday.
Additional Info & Media
|SNOW HISTORY:||Valdez 2/9 AM||Thompson Pass 2/9 AM|
|24 Hour Snow / Water Equiv.||0.4”/Trace”||3″ /0.2″|
|Storm Snow /Water Equiv. (2/8-9)||0.4” /Trace″||3″ /0.2″|
|Current Snow Depth||37.4″||39″|
|February Snow / Water Equiv.||3.1″ /0.2″||6″ / 0.4″|
|Total Winter Snowfall / Water Equiv.||181″ / 16.1”||245″ / 23.1″|
|Snowload in Valdez||50 lbs/sq. ft.|
|SNOWFALL for LAST 24 HRS at OTHER STATIONS:|
|Nicks Valley at 4200 ft (in):||Trace?”|
|Upper Tsaina at 1750 ft (in):||Trace?”|
|Sugarloaf at 550 ft (in):||Trace?”|
|SNOW DEPTH & WATER SURVEY (2/1/2017)||Depth||Snow Water Equivalent|
|Milepost 2.5 Valdez||41.5″||9.8″|
|Milepost 29 Worthington Flats||61.5″||16″|
|Milepost 37 Tsaina River bridge||42.1″||9.3″|
|This survey is done the first week of each month.|
- NWS forecast for Northeast Prince William Sound <here>
- NOAA NWS spot forecast for Thompson Pass <here>
- Thompson Pass RWIS weather station <here>
- MP 30 Nicks (Happy) Valley weather station at 4200 feet <here> (scroll to Nicks Valley)
- Valdez Glacier UAF weather station at 6600 feet <data here> <map here>
- Further weather resources <here>
SNOW CLIMATE ZONES:
- Maritime (Coastal) – from the Port of Valdez to Thompson Pass, all waters flowing into Valdez Arm and everything south of Marshall Pass.
- Inter-mountain (Transitional) – between Thompson Pass and Rendezvous Lodge.
- Continental (Interior) – the dry north side of the Chugach (north of 46 Mile, including the Tonsina River).
Photo of Thompson Pass
Interactive Map of Valdez Forecast Areas w/ Many Resource Layers (Trevor Grams)
NEWS: Our region is “one of the snowiest places on earth” – Serendipity / Rendezvous snowfall record set in 1963 <here>.
Free smart phone avalanche forecasts at: http://www.