THIS AVALANCHE ADVISORY EXPIRED ON March 13, 2017 @ 6:22 am
Avalanche Advisory published on March 12, 2017 @ 6:22 am
Issued by Kent May - Payette Avalanche Center
bottom line

The avalanche danger is MODERATE at all elevations due to human triggered avalanches being possibleThe refreeze of the snow pack from Friday and Friday night was short lived due to warm temperatures and rain falling yesterday up to 7000 feet. Overnight the temperatures dipped below freezing again at all elevations, however, below 7000 feet the brief dip of the mercury had little affect on freezing the soggy snow pack. 

How to read the advisory


  • Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
Avalanche Problem 1: Wind Slab
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Above 7000 feet wind and storm slabs are still present, so you will want to pay attention if you are getting above the elevation that got soaked by the rain. Winds over the last 24 hours have gone form south, southwest, west, and northwest at Granite mountain weather station. Gusts were in the high 20 mph range last night as the storm exited our area. If you travel above 7000 today look for wind transported snow on all leeward aspects, as well as cross loaded terrain features.

Avalanche Problem 2: Loose Wet
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Today loose wet activity is possible on all aspects below 7000 feet. The combination of yesterday afternoon's rain, combined with today's warmer temperatures and possible sun, will make for a warm and soggy snow pack. Avoid steep slopes today below 7000 feet, especially if the sun comes out. Red flags for today will be roller balls/pinwheels (sign of surface snow warming), as well as what seems to be bottomless snow when you step off your sled or skis.

advisory discussion

Snowmobiler/Snowbiker Travel Restrictions: Please respect these closures and other users recreating in them.  Winter Travel Map(East side). You can download the map to the AVENZA app on your phone, and know your exact location while you are out riding.  It is your responsiblity to know where closures exist on the forest.

The Granite Mountain Area Closure is in effect Jan15-March 31, please respect Snowcats operating, signed and unsigned closures and other users in this and nearby areas.  In addition there are other areas on the Payette National Forest that are CLOSED to snowmobile traffic including Jughandle Mt east of Jug Meadows, North of Boulder Mtn, East of Rapid Peak, North of the 20 mile drainage, Lick Creek/Lake Fork Drainage (on the right side of the road as you are traveling up canyon), and the area north of Brundage Mt Ski area to junction "V" and along the east side of Brundage and Sergeants' Mts. with the exception of the Lookout Rd( junction "S").

Photo 1 is from the edge of the signed Brundage Mt. Ski Area just past the Ski Area parking lot, photo 2 is of sled tracks ignoring Catski terrain signs...there is alot of snow out there folks.  Don't be "that" guy on a sled that gives sledders a bad reputation... please respect closures and other users.

The Friends of the Payette Avalanche Center (FPAC) needs YOU! We are in desperate need of more user support and financial assistance. The avalanche forecast is not a guaranteed service, and is in jeopardy of dwindling down to only a couple of days a week in the near future.We have equipment that is overdue for replacement but lack the funds to purchase new gear including weather station parts and our forecast sleds.  Please help if you can by clicking the DONATE tab above. If you value this life saving information, make a donation or help the FPAC in raising funds for the future.

recent observations

No new human or natural avalanches have been reported over the last 24 hours. 

CURRENT CONDITIONS Today's Weather Observations From the Granite Weather Station at 7700 ft.:
0600 temperature: 22 deg. F.
Max. temperature in the last 24 hours: 33 deg. F.
Average wind direction during the last 24 hours: SW
Average wind speed during the last 24 hours: 8 mph
Maximum wind gust in the last 24 hours: 30 mph
New snowfall in the last 24 hours: NA inches
Total snow depth: NA inches
weather

SHORT TERM...Weak Pacific cold front brought showers Saturday
evening to Idaho as far south as the Snake Basin. A couple of
lightning strikes were seen in the Boise Mountains. The front has
moved east leaving partial clearing in our area. Today will be dry
and slightly cooler than Saturday. Broad high pressure aloft from
the north Pacific will bring warming again Monday with temperatures
reaching their highest levels so far this year in southern areas.
Warmest locations will reach the mid 60s Monday afternoon. No
precipitation through Monday except in the northern-most of the
central Idaho Mountains where there will be a few sprinkles or
flurries. Light winds through Monday.

LONG TERM...Monday night through Saturday...Upper ridge will
persist through Tuesday for mostly dry weather, except moisture
within southwest flow aloft will bring a chance of showers across
the far north. Tuesday is expected to be the warmest day of the week
with highs possibly reaching 70F in a few locations, including
Boise. The upper ridge will weaken as a cold front swings through
midweek, accompanied by showers. Temperatures will trend cooler
Wednesday and Thursday. A moist Southwest flow aloft will bring a
chance of showers and a return to milder temperatures by the end of
the week.

Two-Day Mountain Weather Forecast Produced in partnership with the NOAA-NWS
McCall Airport at 5021 feet.
  Sunday Sunday Night Monday
Weather: Mostly cloudy, with a high near 43. South southwest wind 3 to 5 mph. Mostly cloudy, with a low around 25. South southwest wind around 5 mph becoming calm in the evening. Mostly cloudy, with a high near 46. Calm wind becoming south around 6 mph in the afternoon.
Temperatures: high 43 deg. F. low 25 deg. F. high 46 deg. F.
Wind direction: south-southwest south-southwest south
Wind speed: 3-5 5 becoming calm calm-6
Expected snowfall: 0 in. 0 in. 0 in.
Granite Mountain at 7700 feet.
  Sunday Sunday Night Monday
Weather: Mostly cloudy, with a high near 30. West wind 7 to 10 mph. Mostly cloudy, with a low around 24. West wind 9 to 11 mph. A 20 percent chance of snow showers after noon. Mostly cloudy, with a high near 36. West southwest wind 10 to 14 mph.
Temperatures: high 30 deg. F. low 24 deg. F. high 36 deg. F.
Wind direction: west west west-southwest
Wind speed: 7-10 9-11 10-14
Expected snowfall: 0 in. 0 in. 0 in.
Disclaimer

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.