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US Extended Snowfall Outlook
Updated April 10, 2017 (OLD)

TAHOE --> Across the western US later Tuesday through later Thursday (afternoon/ evening) it looks like Tahoe is the place to be for new snow, with the best snowfall Wednesday afternoon through Thursday morning, and snow levels starting near 7,000 feet or so, dropping to near 6,000 feet (below all Tahoe area resort base elevations) as strong late season low pressure moves in and through. A good foot of new snow is possible, with 1.5+ feet above 7,000 feet Wednesday afternoon through Thursday morning. Dynamics + moisture make this look like a bigger than 1 foot storm, but we will see... show up on Thursday for the freshies, with lighter snow showers continuing on a colder Thursday. The Cascades of Oregon/ Washington will also see more new snow, as will northern Idaho and northwest Montana. The rest of the west looks mostly dry. CM

LONGER RANGE...
Sunday through next Thursday looks snowy for Tahoe-Mammoth, with the storms that hit the west coast (full strength) weakening as they move inland. Snow is expected for the northern and central Rocky Mountains and northern Utah, Colorado as well. Resorts from Jackson Hole to Big Sky, Sun Valley to Whitefish, are all expected to see new snow, though many resorts will be closed by this point. The backcountry will be freshened up though. CM
Forecast discussion for Aspen-Snowmass and Western Colorado

Updated for Friday, July 21, 2017, at 8:00am...
A moisture plume has shifted to across the area, with increased shower and thunderstorm potential in Aspen this afternoon/ evening (some good soaking showers), and the rest of western Colorado. By this weekend we expect some drying as a weather disturbance moves southeast and away, dropping thunderstorm and showers to isolated tomorrow afternoon. We expect mostly sunny weather until next Tuesday and Wednesday, when increased moisture is dragged across the area due to low pressure moving into the northwest US, channeling moisture across the area from the desert southwest. CM

LONGER RANGE...
The increase in thunderstorms and showers continues most of next week and weekend as high pressure ridging goes from overhead, to slightly east, as low pressure moves across the Northwest US and channels monsoon moisture from the desert southwest across Colorado. CM
SnowMap Legend
CUSTOM FORECAST DETAILS
Weather Icon

↑54° / 12c°

↓41° / 5c°

Mountain Graphic

Sky Condition

Mostly cloudy with showers

Snow Potential

None Expected

Precipitation

Showers (Potential precip: 1.04in, 26.41mm)

Wind

From the WNW at 5 to 11 MPH.

Weather Icon

↑52° / 11c°

↓37° / 3c°

Mountain Graphic

Sky Condition

Mostly cloudy with light showers likely

Snow Potential

None Expected

Precipitation

Showers (Potential precip: 0.38in, 9.65mm)

Wind

From the N at 3 to 7 MPH.

Weather Icon

↑52° / 11c°

↓37° / 3c°

Mountain Graphic

Sky Condition

Partly cloudy with thunderstorms likely

Snow Potential

None Expected

Precipitation

Scattered Storms (Potential precip: 0.72in, 18.24mm)

Wind

From the E at 7 to 11 MPH.

Weather Icon

↑54° / 12c°

↓41° / 5c°

Mountain Graphic

Sky Condition

Partly cloudy with scattered showers

Snow Potential

None Expected

Precipitation

Scattered Showers (Potential precip: 0.06in, 1.5mm)

Wind

From the NNW at 6 to 9 MPH.

Weather Icon

↑55° / 13c°

↓43° / 6c°

Mountain Graphic

Sky Condition

Partly cloudy with isolated storms

Snow Potential

None Expected

Precipitation

Isolated Storms (Potential precip: 0.57in, 14.5mm)

Wind

From the NNE at 8 to 9 MPH.

Weather Icon

↑55° / 13c°

↓39° / 4c°

Mountain Graphic

Sky Condition

Partly cloudy with thunderstorms likely

Snow Potential

None Expected

Precipitation

Scattered Storms (Potential precip: 0.47in, 11.83mm)

Wind

From the NE at 7 to 9 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

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