Intermountain Zone Forecast

December 11, 2017

Issued: Mon, Dec 11, 2017 at 8AM

Expires: Thu, Dec 14, 2017

Above 2,500ft High

1,800 to 2,500ft Considerable

Below 1,800ft Moderate

Degrees of Avalanche Danger ?

1. Low
2. Moderate
3. Considerable
4. High
5. Extreme

Avalanche Danger Rose ?

Avalanche Problems ?

Problem Details

Recent Avalanche Activity

Numerous avalanches to size 3 ran to the valley floors across the region Wednesday December 6 and Friday December 8.

Recent Weather

WEATHER FORECAST for NEXT 24 HRS at 3,000 ft:
Temperature Forecast (Min/Max *F):   30/32
Ridgetop Wind Forecast (direction/mph):  SE/10-45
Snowfall (in/water equivalent): 4″ /o.54″
WIND & TEMPERATURE
PAST 24 hours
Ferry Terminal Thompson Pass
Average Wind Speed (mph) / Direction   ~ /~ ~ /~
Max Wind Gust (mph) / Direction   ~ /~  ~ /~
Temperature Min / Max (*F) ~ /~ ~ /~

Weather Forecast:

Precipitation continuing for the foreseeable future with up to 3 feet of snowfall accumulating at Thompson Pass this week.

Additional Info & Media

 

SNOW HISTORY: Valdez 12/11 AM Thompson Pass 12/11 AM
24 Hour Snow / Water Equiv. 0”/1.01″ 11″ /1.7″
Storm Snow /Water Equiv. [12/10-11]  0″ /1.57″rain 15″ /2.4″
Current Snow Depth 16″ 57″
December Snow / Water Equiv. 33.5″ /12.29″ 98″ / 12.9″
Total Winter Snowfall / Water Equiv. 46.5″ /12.88” 163″ / 18.4″
Snowload in Valdez 47 lbs/sq. ft.

 

SNOWFALL at OTHER STATIONS:
LAST 24 HRS (12/6 AM)/STORM TOTAL (12/2-present)/STORM WATER EQUIV.:
Nicks Valley at 4200 ft (in): ~” / ~” / ~”
Upper Tsaina at 1750 ft (in): ~” / ~” / ~”
Sugarloaf at 550 ft (in): ~”/ ~” / ~”
SNOW DEPTH & WATER SURVEY (12/2017) Depth Snow Water Equivalent
Milepost 2.5 Valdez  ″  ″
Milepost 18
Milepost 29 Worthington Flats
Milepost 37 Tsaina River bridge
This survey is done the first week of each month.

Weather Quicklinks:

SNOW CLIMATE ZONES:

  • coastal-zone-iconMaritime (Coastal) – from the Port of Valdez to Thompson Pass, all waters flowing into Valdez Arm and everything south of Marshall Pass.
  • intermountain-zone-iconInter-mountain (Transitional) – between Thompson Pass and Rendezvous Lodge.
  • interior-zone-iconContinental (Interior) – the dry north side of the Chugach (north of 46 Mile, including the Tonsina River).

Photo of Thompson Pass

thompson-pass-ski-runs

Interactive Map of Valdez Forecast Areas w/ Many Resource Layers (Trevor Grams)

climate-zones-topoclimate-zones-satellitegoogle-earth1

Run Map of Thompson Pass Area (Sean Wisner) (2MB download)
VAC Run Map Thompson Pass

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.avalancheforecasts.com/

Posted in Continental Forecasts, Intermountain Forecasts, Maritime Forecasts, VAC Forecasts.