US Forest Service Manti-La Sal National Forest

 Introduction:  Good morning, this is Dave Medara with the USFS Manti-La Sal Avalanche Center with your avalanche and mountain weather advisory.  Today is Saturday, March 18th at 7am. This advisory will expire in 24 hours.

 

The Lasaloppet, an 18-k Nordic race in the La Sal Mountains, is scheduled for Saturday, March 25th, 2006.  Please call McKay Edwards at (801) 588-0911 or [email protected] form more information. 

 

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.

Please give us your observations from the field HERE.  The more observations we get, the better this forecast can be. 

 

  

General Conditions:

The forecast snowfall that was supposed to arrive last night has not. This warm, slow moving storm still has the potential to give us small amounts of snow into next week. Another warm day to settle out the snow pack. Things are starting to consolidate in thicker snowpack areas. The trap door has finally closed and the rotten snow conditions are difficult to find now. Conditions are mostly supportable out there these days and we are moving in to that great Southwestern snow mode of corn snow on the sunny slopes and powder snow on the other side, on colder NE-NW facing slopes. Yesterday on our tour we were able to find some great powder skiing on N facing, open slopes below treeline. Skiing in the trees is crusty due to re-radiation and snow falling off the trees. Over on the sunny sides, crusts are getting supportable and corn skiing is coming into shape. The crusts will be thin, so start early and finish early on the sunny SE-W facing slopes.  This dense, heavy snow has brought our snowpack totals up to 93% of normal here in the La Sals and 43% of normal in the Abajos.  The road to the Geyser Pass trailhead is plowed but narrow, so passing oncoming traffic can be a challenge if you’re not near a pullout. Forget about skate skiing until preparations for the Lasaloppet get under way or we get more snowmobile traffic.

  Mountain Weather: (At 10,500’)

Today: Occasional snow. High near 43. Breezy, with a south southwest wind between 15 and 25 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Tonight: Periods of snow, mainly before
5am. Low around 17. South southwest wind between 10 and 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Sunday: Snow likely, mainly before 5pm. Cloudy, with a high around 32. South southwest wind between 10 and 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Sunday Night: A 50 percent chance of snow. Mostly cloudy, with a low near 20. West southwest wind around 10 mph. New snow accumulation of 1 to 3 inches possible

                                                                                                                                                                                                                                            

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)

54” 

trace

30

tr

Geyser Pass

200+ cm

0

N/a 

tr 

Gold Basin and South Mountain

78”/200 cm

0

n/a

tr

Pre-Laurel Peak Station (11,705’)

N/a 

N/a 

16

20 – 30 mph southerly 

 

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

 

The new snow from last week has settled down into a bridge that has added a lot of strength to the snowpack. Skiing on N. facing slopes is excellent. Skiing on S. facing slopes is excellent. We are finally getting it in the La Sals. There are still areas of weak snow underlying the bridge though, and if you are able to trigger something in the La Sals it is likely to be very deep and nasty. There was not a lot of avalanche activity associated with this storm, but a few of the avalanches that did release were formidable.  Approach steep NE-NW facing slopes with caution. Take a look at the snowpack. Thinner, weaker snowpack areas are likely trigger points. Keep in the back of your mind that an avalanche IS possible on slopes steeper than 30 degrees in the La Sals. Danger areas are NE-NW facing slopes in the near treeline elevations and areas above treeline that have been loaded by recent South winds. On the sunny side slopes, be aware of the effects of temperature and solar radiation and be prepared to call it a day or move to less sunny slopes when things get sloppy. Today’s Bottom line: The avalanche danger on E-NW facing slopes is MODERATE W/ Pockets of CONSIDERABLE above treeline elevations. On the sunny side slopes, expect the avalanche danger to start off LOW and progress to MODERATE as things warm up today.  We’ll update this message tomorrow morning, thanks for checking in.