Today the Sun, and warmer temperatures, may produce wet-loose slides and roller balls. Be cautious on steep slopes getting direct sunlight especially this afternoon. Rocky outcrops are the most likely areas to shed snow. If you start seeing rollerballs forming, choose another slope aspect that is not getting heated by the Sun.
Yesterday, North of Brundage Ski Resort, on Sgt's mountain, the Sun was lighting up the fresh crop of large Surface hoar that formed on the surface of the snow. Travel was easy and smooth on about 6-10 inches of new snow on top of a crust on all but upper due Northern aspects of Sgts mountain. The numerous mit pits showed good bonding of the new snow on the crust.
Around 3 pm, the Sun felt very warm, but slopes facing to the North stayed cool above 7,000 feet with a little help from the wind.
Surface hoar and graupel was widespread, and will likely get destroyed in the next few days, but we will see how well the next layers of snow Friday night will bond.
|0600 temperature:||24 deg. F.|
|Max. temperature in the last 24 hours:||26 deg. F.|
|Average wind direction during the last 24 hours:||E|
|Average wind speed during the last 24 hours:||17 mph|
|Maximum wind gust in the last 24 hours:||17 mph|
|New snowfall in the last 24 hours:||0 inches|
|Total snow depth:||NA inches|
Area Forecast Discussion
National Weather Service Boise ID
257 AM MDT Wed Mar 11 2020
.SHORT TERM...Today through Friday night...Sunny and several
degrees warmer today under dry wnw flow aloft. Clear and cool
tonight except partly cloudy with a slight chance of snow
showers in the central idaho mountains. Upper trough from the
north will bring breezy and cooler weather Thursday with skies
becoming sunny again. Clouds will increase from the northwest
Friday as a stronger upper trough approaches. This will lead
to snow showers in northern areas and a chance of rain and snow
showers in southern areas Friday night.
.LONG TERM...Saturday through Wednesday...An upper low will
progress southward along the Pacific Coast this weekend, causing
widespread precipitation over the Intermountain West. Temperatures
will fall 5-8 degrees below normal behind a cold front on Saturday,
causing snow levels to drop near/to valley floors. Beyond Sunday,
the system is expected to progress eastward across the Great Basin,
stirring up snow showers across the region through Wednesday.
.AVIATION...Mostly VFR. Isolated MVFR/IFR conditions due to
fog/stratus. Surface winds: generally SE to SW less than 10 kts,
becoming NW 5-15 kts with gusts up to 20-25 kts in the afternoon.
Winds aloft to 10k feet MSL: westerly 20-25 kts.
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.