US Forest Service Manti-La Sal National Forest

 Introduction:  Good morning, this is Max Forgensi with the USFS Manti-La Sal Avalanche Center with your avalanche and mountain weather advisory.  Today is Sunday, March 5th at 7:30 am. This advisory will expire in 24 hours.

 

To see past advisories check out the ARCHIVE.  To see current conditions go to our WEATHER PAGE.  To see photos go to the AVIPHOTOS page.

 

MLAC NEWS: We have started an observer page for folks to send us their backcountry observations. Report what you see in your backcountry travels HERE. Please send us your reports on avalanches, ski conditions, road conditions, snow pit profiles etc. Thanks! You can also report observations at 435-636-3363

  

General Conditions:

           Ridge top winds yesterday were consistently blowing out of the south of southwest.  For the past 24 hours, wind averages have been between 14 and 27 mph on top of ridges.  Yesterday was a beautiful day in the La Sal’s, today should be a bit warmer and the winds should die down.  Snow surface conditions will be mixed today.  You will find supportable and breakable crusts on South through West aspects while on North aspects you can still find some consolidated powder on wind/sun protected slopes…read the trees.  In the alpine, there are places with no snow and places with thin ribbons of snow.  Be careful, the snow pack is still thin in these areas.   I would ski conservatively and be careful once again of ground hazards.  We are only at 71% water equivalent for the La Sal Mountains so far this year. 

            The road to the Geyser Pass trailhead has been graded down low and plowed up high, there are some icy spots on the road.  The Nordic and Skate skiing conditions up to Geyser Pass and into Gold Basin will be wonderful today.  

 

  Mountain Weather: (At 10,500’)

Today: Partly cloudy, with a high near 43. South southwest wind between 10 and 15 mph.
Tonight: Partly cloudy, with a low around 23. South southwest wind around 15 mph.
Monday: Mostly cloudy, with a high near 42. Windy, with a south southwest wind 15 to 20 mph increasing to between 25 and 30 mph. Winds could gust as high as 40 mph.
Monday Night: A 40 percent chance of snow. Mostly cloudy, with a low near 23. Windy, with a southwest wind between 25 and 30 mph, with gusts as high as 40 mph.

                                                                                                                                                                                                                                            

Weather Station/ Location

Snow Depth (HS):  in./cm

New Snow (HN) in./cm

6:00 a.m. Temp (F)

Current Observations:  Wind, 48 hour snow

Geyser Pass Trailhead (9,600’): (snotel link)

24” 

0

32

Already at freezing

Geyser Pass

 133 cm

0

N/a 

Deepest place these days 

Gold Basin and South Mountain

42”/105cm 

0

n/a

 

Pre-Laurel Peak Station (11,705’)

N/a 

N/a 

18.7

6:00 am-South-Southwest @ 18 gusts to 31 

 

Avalanche Conditions: (Link to the International Avalanche Danger Scale here)

           The wind has been really strong for the past 48+ hours, meaning any available snow for transport in fetch areas on Southerly aspects will have moved.  Many factors will have limited the snow transport…lack of snow on Southerly aspects, warm temperatures that have made any snow available for transport too heavy to transport and finally the dry air mass will more than likely sublimate any snow that is able to transport into the atmosphere.  If any wind slabs formed in the past 48 hours, they will be very isolated pockets and will be found much lower in starting zones than anticipated.  Before the blow dryer turned on, the snow on the ground had a very weak snow pack structure.  Facets reign on Northerly aspects while Southerly aspects have reactive crust sandwiches. 

The BOTTOM LINE for today will be an avalanche danger of MODERATE on steep North-East aspects with the classic slab/weak layer (depth hoar)/bed surface (ground) with no anchors and pronounced trigger points.  Be careful on those South-West aspects where crust sandwiches are lying about as well.  Although these areas are isolated today, I am reluctant to give the LOW avalanche danger for all areas today.  Our continental snow pack has yet to heal itself of basal instabilities.  

 

We need your observations! Call 435-636-3363 or use the link near the top of the page to get to the observers page! Yes, DO IT!

Take a look at a snow pit from our tour on 01/15/06 here.