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US Extended Snowfall Outlook
(Updated Sunday, Feb 12 for Monday Feb 13) - 16-24 Feb looking good from Squaw Valley to Kirkwood, Mammoth Mountain, also to Southern California's resorts including Mountain High and Bear Mountain, Snow Summit, Snow Valley (heavy snow at times during this period), and the Arizona Snowbowl. Snow will also hit the northern through southern Rocky Mountains, with snowfall more light to moderate there.

By the 16th - 18th (Thursday through Saturday), we see a strong and consolidated jet stream start pushing in across the west coast, and the rest of the western US by Sunday (19th) and into the following week (including southern California where some big storms are likely), with a renewal of snowpack building storms, colder this time around than recent systems. This unsettled pattern should last through the 24th or so, followed by another high pressure ridge and mostly sunny conditions for Western US mountain resort areas. CM
For good information on the snow pack across the US and into southern Canada, including temperature of the snow pack, snow melt, sublimation, new snowfall, snow depth, expected snow, and other parameters/ variables, zoomable with great detail, all overlayed on some really nice maps ~different map choices~ that you can select from, please see our constantly evolving Snowpack Info maps here, and Snow Forecast probability maps here: Best on the net! If you know of better please let us know.
Forecast discussion for Aspen-Snowmass and Western Colorado

Updated for Thursday, February 23, 2017, at 1:00am...
Today we see snow increasing as low pressure sweeps in and through Colorado with a strong cold front, strong dynamics, limited moisture after the initial snow band that moves trough this morning. By late morning/ afternoon, the wind flow across the mountains becomes more west/ northwest, and the northern mountains snow rates increase, with some good accumulations there also. Basically, it is going to feel and look like winter for 8 days+, with significant-heavy snowfall expected for most areas of Colorado, including Aspen-Snowmass, and Summit/ Grand County areas. It looks like the snow will keep moving in through this weekend and into next week, with the first few+ days of March looking great for new snow! CM

LONGER RANGE...
Next Monday and Tuesday look busy (next big snowfall) as a big storm moves into and through the area, mostly strengthening across the area as the axis of the low pressure trough is shifted to the east of California. We expect that we will see significant snowfalls between next week and through early March, possibly through the first 10 days of March, tapering off as we approach mid-March. CM
Check out our 2016-2017 snow outlook/ guidance here
SnowMap Legend
CUSTOM FORECAST DETAILS
Weather Icon

↑12° / -11c°

↓-8° / -22c°

Mountain Graphic

Sky Condition

Mostly cloudy with light snow

Snow Potential

We are expecting 5 to 8 inches of snowfall (13 to 20cm)

Precipitation

80% chance for snow. (Potential precip: 0.18in, 4.61mm)

Wind

From the W at 9 to 11 MPH.

Weather Icon

↑12° / -11c°

↓0° / -18c°

Mountain Graphic

Sky Condition

Mostly cloudy with scattered snow showers

Snow Potential

We are expecting 3 to 5 inches of snowfall (8 to 13cm)

Precipitation

50% chance for snow. (Potential precip: 0.09in, 2.33mm)

Wind

From the W at 9 to 15 MPH.

Weather Icon

↑19° / -7c°

↓3° / -16c°

Mountain Graphic

Sky Condition

Partly cloudy with scattered snow showers

Snow Potential

We are expecting a trace to 1 inch of snowfall (1 to 3cm)

Precipitation

40% chance for snow. (Potential precip: 0.02in, 0.46mm)

Wind

From the W at 6 to 9 MPH.

Weather Icon

↑25° / -4c°

↓7° / -14c°

Mountain Graphic

Sky Condition

Mostly cloudy with scattered snow showers

Snow Potential

We are expecting 3 to 5 inches of snowfall (8 to 13cm)

Precipitation

50% chance for snow. (Potential precip: 0.2in, 5.03mm)

Wind

From the WSW at 8 to 10 MPH.

Weather Icon

↑19° / -7c°

↓0° / -18c°

Mountain Graphic

Sky Condition

Mostly cloudy with scattered snow showers

Snow Potential

We are expecting 3 to 5 inches of snowfall (8 to 13cm)

Precipitation

50% chance for snow. (Potential precip: 0.13in, 3.33mm)

Wind

From the W at 9 to 13 MPH.

Weather Icon

↑21° / -6c°

↓1° / -17c°

Mountain Graphic

Sky Condition

Partly cloudy with slight chance of light snow

Snow Potential

None Expected

Precipitation

20% chance for snow. (Potential precip: 0in, 0.03mm)

Wind

From the W at 6 to 11 MPH.

27 Sep 2016 - 11:20am PST
What is the weak La Nina/ ENSO Neutral SST pattern going to bring this winter of 2016-2017? We put together a comparison to some past possibly analogous years, here: Here is some guidance, using previous similar pattern years. This guidance is for Aspen, near base elevations (mid and upper mountain get 2 to 3 times as much snow).CM

Keystone is home to three magnificent mountain playgrounds—Dercum Mountain, North Peak, and The Outback. There’s something special for every skier and rider of any level at each mountain. There are more than 3,000 vertical feet and over 3,000 acres of bumps and bowls, glades and steeps, groomers and rollers to be experienced.