What is SWE? SWE stands for Snow Water Equivalent. What it measures is the amount of liquid water in the snow. If you took a height of snow and melted it, the height of the water created is SWE. For example, if 10″ of snow falls at 10% density,...
This month’s snowpack update comes as we transition from winter to spring. As of March 22, the Snow Water Equivalent (SWE) totals in west central Montana are just above average (Figure 1). After a month of small storms and average temperatures, our primary avalanche concerns are focused on...
Snowpack Discussion The snowpack continues to evolve in West Central Montana. In late January, our primary avalanche concern was persistent slab avalanches failing on facets at the bottom of the snowpack. During this time period, several natural persistent slab avalanches failed near the ground. Although the exact timing remains...
Avalanche conditions from January 11th until January 24th have been at considerable danger, trending towards moderate danger. We are currently most concerned with persistent weak layers, failing near the ground on depth hoar and facets. The second problematic persistent weak layer is a combination buried surface hoar, near-surface facets, and crusts. This weak layer is found at different...
WCMAC forecasters are in the field analyzing how recent storm snow is gaining strength, tracking where the wind is drifting snow and keeping a close eye on buried persistent weak layers. This Thursday 1/10/19 from 6 – 8 PM at Big Sky Brewing, they will return from a day in...
Education | Fundraising | General | Snowpack | Weather
Avalanche forecasters play a critical role in protecting the public and raising avalanche awareness by communicating the potential for avalanches to cause harm or injury to backcountry travelers. West Central Montana Avalanche Center (WCMAC) forecasters work to keep you informed of the danger avalanches pose by gathering as much information as possible from...
Generating backcountry travel plans without avalanche center forecast information requires knowledge of weather events. Review snotel data for current snow totals and weather station data for temperatures, wind trends, and speeds. With these tools, you can get an idea of the avalanche problems you could encounter on your trip and choose appropriate terrain...
Education | Fundraising | Snowpack | Weather
This Thursday evening, February 22nd from 6-8 pm, Big Sky Brewing will be hosting our Beers With Your Avalanche Forecaster finale! In an ongoing effort to help us make the Montana backcountry a safer place, Big Sky Brewing is donating event proceeds to the West Central Montana Avalanche Foundation....
The week started out simply enough, a scattered inch here and there before dramatically shifting mid-week. Wednesday brought a foot of snow to the Seeley Lake area and inch and a half of water. The northern half of the advisory area got the most snow and water from the...
This weeks weather is easier to summarized than the last two weeks. There were no storms bringing feet of snow, just the occasional inch or two here and there. It may come as a surprise considering the lack of any major weather events but this week was marked by...
The second week of advisories are in the books and boy was it a doozie. The week started cold and relatively calm. Over the Christmas Holiday snow slowly started to accumulate as 3-6 inches of snow accumulated monday and again on Tuesday. Snows tapered slightly Wednesday before picking up...
Education | Fundraising | General | Mechanized | Snowpack | Weather
It’s winter in western Montana and we’re headed into the backcountry. In an effort to make Montana’s winter playground a safer place, Big Sky Brewing is hosting Beers With Your Forecaster. This event is a great opportunity to gain insight on current snow conditions and learn about what goes into generating...
In conjunction with UM Campus Recreation, the West Central Montana Avalanche Foundation is hosting a free two-part Mountain Weather lecture series. Featuring guest speaker, LeeAnn Allegretto, NOAA Meteorologist and Avalanche Program Leader from the National Weather Service. Both sections are open to the public and will be held in the...
Education | General | Mechanized | Snowpack | Weather
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We have had two public observations of wind slabs in the Bitterroot. Take a look before you head out. Remember identify wind slabs and avoid them. These slabs are on many different aspects, and some slopes are cross-loaded due to the changes in wind direction over the last couple...
In conjunction with U of M Campus Recreation we will be hosting a free Mountain Weather Class. Featuring guest speaker, LeeAnne Allegretto, Meteorologist and Avalanche Program Leader from The National Weather Service. The class will be in the North Urey Underground Lecture Hall from 600pm -800pm Part 1 on January 12...
