Granite Mountain Weatherstation
Small, wind slabs are still possible in high, alpine areas that were loaded by strong winds yesterday and earlier this week. You may still be able to trigger these 6-12" thick slabs, especially in areas that had either a thin crust or a layer of faceted snow left over from last weeks high pressure conditions.
These wind slabs will likely not spread out or propagate much further than the area under your skis or snowmobile, but remember if you are in steeper or complex terrain, even a small avalanche can have big consequences. As you travel, look for slopes that don't have the obvious visual clues of wind affect; ripples across a slope or deeper deposits of snow drifted in under cornices or cliffs should be avoided or managed as potentially problematic areas.
Northerly winds increased yesterday with gusts in the mid 20's. There isn't much snow available for transport but be aware of the effect these winds are having on the snowpack in the northerly terrain.
Cornices are large right now. Avoid traveling directly above or below large overhanging cornices, they may fail unpredictably or further back than you are expecting.
Yesterday we observed some small loose activity from the Sun, but it was far from warm under the North winds that pushed around the little snow that we got overnight, maybe 2-3 inches in the uppermost elevations. The wind created drifts and scoured the soft snow off some ridges leaving a sheen in some places. Stability is much better than the snow quality, but finding good skiing and riding is still possible in areas that are untracked, but conditions are challenging on many slopes.
|0600 temperature:||13 deg. F.|
|Max. temperature in the last 24 hours:||19 deg. F.|
|Average wind direction during the last 24 hours:||ENE|
|Average wind speed during the last 24 hours:||8 mph|
|Maximum wind gust in the last 24 hours:||24 mph|
|New snowfall in the last 24 hours:||0 inches|
|Total snow depth:||NA inches|
Area Forecast Discussion
National Weather Service Boise ID
308 AM MST Mon Mar 2 2020
.SHORT TERM...Today through Wednesday night...A dry northwest
flow will support breezy conditions this afternoon, though not to
the magnitude of yesterday`s wind. Most of the area will remain
dry through the period as flow aloft becomes more westerly
through Wednesday. A couple of weak shortwave troughs will graze
the northern zones, bringing a chance for light snow to the
e-central Oregon and w-central Idaho mountains on Tuesday and
again Wednesday. Precipitation totals from these systems will be
light with liquid amounts less than a tenth of an inch and
snowfall less than an inch. Temperatures will warm through
period, with highs running 5-10 degrees above normal by Wednesday.
.LONG TERM...Thursday through Monday...An upper level ridge over
the Intermountain Region on Thursday is forecast to move east of
the Rockies Thursday night and Friday, as an upper level trough
from the Gulf of Alaska approaches the northwest coast.
Temperatures will be 10-15 degrees above normal both days, with no
precipitation. The trough will begin moving inland Friday night,
spreading showers into southeast Oregon and the central Idaho
mountains Friday night and the rest of our area on Saturday. Snow
levels 4000-5000 feet on Saturday will lower to the valley floors
by Sunday morning, but the probability of measurable precipitation
will decrease to only a slight chance in the valleys. Scattered
snow showers will continue over the mountains through Monday.
Temperatures will cool to around 5 degrees above normal on
Saturday and near normal Sunday and Monday.
.AVIATION...VFR under mostly clear skies today. Increasing clouds
tonight with a chance of snow showers over the mountains of Baker
County Oregon and west central Idaho late tonight and Tuesday
morning. Surface winds variable less than 10 kts, becoming
northwest 10-15 kts after 18z. Winds aloft at 10k ft MSL north
This avalanche advisory is provided through a partnership between the Payette National Forest and the Payette Avalanche Center. This advisory covers the West Central Mountains between Hard Butte on the north and Council Mountain on the south. This advisory applies only to backcountry areas outside established ski area boundaries. This advisory describes general avalanche conditions and local variations always occur. This advisory expires at midnight on the posted day unless otherwise noted. The information in this advisory is provided by the USDA Forest Service who is solely responsible for its content.