#two-wave-snow-cycle

#two-wave-snow-cycle

The ongoing Sunday night into Monday storm across the central Andes keeps producing mainly upper-mountain snow through Monday before tapering out by Tuesday morning, April 21. A realistic near-term outcome is about 16-20 cm at Las Leñas, 9-11 cm at Valle Nevado, and lighter 5-8 cm amounts around El Colorado, La Parva, and Portillo.

Avalanches kill about 100 people in Europe each year, with vast masses of ice, snow and rock regularly crashing down on hikers and skiers who have been caught unawares. The structure of the snow, angle of the slope and variation of the weather can dictate whether a gentle disturbance like a gust of wind or the glide of a snowboard can trigger a deadly shift in the mountain.

A bomb cyclone produced freezing temperatures across a large portion of the US from the Gulf coast to New England, bringing heavy snow to North Carolina where two were killed in storm-related conditions, and setting records in Florida, where officials warned of ice and falling iguanas. About 150 million people were under cold weather advisories and extreme cold warnings in the eastern portion of the US,

From Tuesday, March 31 through early Friday, April 3, most open Sierra resorts should pick up fresh snow, with snow levels falling from around 6,500 to 8,000 feet toward 3,500 to 5,000 feet.

Many of us are riding the high of the recent major snowstorm wondering when the next big powder day will swing through. Unfortunately for most of North America, it looks like the snowy weather won't be returning anytime soon, or at least not for the next week. Meteorologist Chris Tomer 's Mountain Weather Update paints a rather sad picture for snowfall totals in North America between January 29th and February 5th.

WeatherA multi-day storm cycle targets the Alps this week, then reloads with colder air next weekend while snow chances continue into midweek. The western Alps look like the main winners overall, with frequent snowfall pulses and the deepest totals at higher elevations. Snow levels run high enough at times midweek to keep lower villages on the edge of wet snow or rain, then they drop sharply heading into the weekend.

To get back to average snowpack, we essentially need to have the most snow that we've ever had for the last 30 years between now and mid-April. It would be extremely difficult for Colorado to get back to a normal/average snowpack. As an example, when looking at the Independence Pass SNOTEL site in central Colorado outside of Aspen, we typically have 13 inches of snow-water-equivalent at the end of February. This year, we only have 6.7 inches of SWE.

This image, acquired with the MODIS (Moderate Resolution Imaging Spectroradiometer) on NASA's Terra satellite, provides a wide view of meager western snow cover on January 15. On that day, measurements derived from satellite observations showed that snow blanketed 142,700 square miles (369,700 square kilometers) of the west. That's the lowest coverage for that date in the MODIS record dating back to 2001 and less than one-third of the median. Coverage had increased slightly by January 26.

The midweek stretch looks like the most reliable window for fresh turns, with the steadiest snow lining up Wednesday night into Thursday and lighter add-ons into Friday. Snow levels run a little high early, then step down late week, so snow quality should improve as the storm cycle matures. Some areas could see the next wave begin as early as Sun night (02/15), but confidence drops quickly with lead time and placement.

Sun night (02/15) through Tue night (02/17) is the core punch, and many Sierra mountains can stack 20″-50″ in that window as snow levels crash. Expect a lighter start Sunday night, then snowfall rates ramp up hard Monday night into Tuesday with widespread coverage across Tahoe, the central Sierra, and down into Mammoth. Snow levels begin around 5,000 to 5,500 feet early, then fall into the 1,500 to 2,500-foot range by Tuesday and Tuesday night, which helps keep even lower terrain in play for all-snow.

Last week alone, parts of western Switzerland were buried under 1 to 1.5 meters (3 to 5 feet) of snow. Another meter fell this week in some regions, pushing fresh storm totals to as much as 2.5 meters (8 feet). The new snow has helped erase what had been a snow-poor winter in the west, with snow depths in some areas now well above seasonal averages.

3-time Olympic alpine skier Tommy Ford sat down with Condé Nast Traveler to discuss the different types of snow conditions you find around the world, from the Beaver Creek in Colorado to Ushuaia, Argentina, and Lake Takapō in New Zealand. The discussion was mostly surrounding the snow conditions while racing or training, not the off-piste or regular trails that most skiers are riding, but he does touch on some other forms of snow.