Willamette Pass 7-Day Snow Forecast

Willamette Pass Long-Range Snow Forecast Updated today

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Updated 12 April 2026 00:45 BST

Long-Range Snow Forecast for Willamette Pass

Long-range (14 to 45 days) from 12 April.

For Forecast detail, see below.

Willamette Pass Snow Forecast Highlights

When will there be fresh snow in Willamette Pass?

Willamette Pass Snow Forecast Highlights - GFS
Snowfall prediction at mid-mountain (1,799m)
Next Snow Expected	12 April
Next Snow Amount	8cm 3in
Next 48 Hours	12cm 5in
Next 7 Days	27cm 11in

Long-range Snow Outlook for Willamette Pass

Snowfall

Snow Line

Max 7℃ 45°F
Min -9℃ 15°F

27cm 11in New Snow

Snow Line from 1,639m 5,377ft to resort level ( 1,561m 5,121ft ).

Powder Alert!

Powder Alarm issued 12 April 2026 05:44 BST

Powder Possible :- 12cm 5in of Fresh Snow is forecast for Willamette Pass over the next 2 days.

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Willamette Pass Long-Range (2 weeks+) Snow Forecast Outlook

Note :- Mountain weather is extremely dynamic; the forecast below will change. Any forecast snow may move forward or back in the forecast, and predicted snowfall depths will be revised in subsequent updates.

16 Day Weather and Snow Forecast for Willamette Pass from OpenMeteo(GFS)
	Snow and Weather	Temp Town
Sun 12	7cm to 8cm 3in New Snow Heavy snow showers. Snow Line from 1,639m 5,377ft to resort level ( 1,561m 5,121ft ).	Max 3℃ 37°F Min 0℃ 31°F
Mon 13	4cm to 6cm 2in New Snow Light snow showers. Snow falling to resort level ( 1,561m 5,121ft ).	Max 1℃ 34°F Min -2℃ 29°F
Tue 14	Cloudy.	Max 5℃ 41°F Min -4℃ 26°F
Wed 15	14cm 6in New Snow Heavy snow showers. Snow falling to resort level ( 1,561m 5,121ft ).	Max 0℃ 31°F Min -6℃ 22°F
Thu 16	1cm New Snow Cloudy. Snow falling to resort level ( 1,561m 5,121ft ).	Max -1℃ 31°F Min -9℃ 15°F
Fri 17	Cloudy.	Max 3℃ 38°F Min -8℃ 17°F
Sat 18	Cloudy.	Max 7℃ 45°F Min -5℃ 24°F

This Snow Forecast for Willamette Pass, United States gives the predicted Snowfall and Freezing Levels for the next week.

The forecast snowfall depths given are the likely average accumulations for the Lower and Upper slopes. The actual snow depth in Willamette Pass, on any given piste or itinerary, may be dramatically different, particularly if the snowfall is accompanied by high winds and/or varying air temperatures.

Snow Forecasts beyond two days ahead are subject to significant change and variable reliability.

Willamette Pass Snow Forecast updated at 00:45 BST, next update expected imminently.

Ensemble forecast for Willamette Pass, USA at 1,561m

Daily Mean Temperature (yellow line is control)

Daily Total Precipitation (blue line is control)

What are Forecast Ensembles ? Multiple forecasts from running the same weather model with slightly different inputs. The prominent line (the 'control') is the model output from standard inputs, the thinner lines are the variations. Plotted together, they show a range of possible outcomes; the closer they are, the higher the confidence.

How to read Long Range Ensemble Forecasts

These forecasts are from ECMWF EC46, a long-range, low-resolution (area) model. They may not accurately reflect local conditions and should be read as area forecasts, indicating whether the coming weeks are likely to be warmer, colder, wetter, or drier than average.

What to look for?

Temperatures trending downward at the same time as precipitation spikes upward... means snow!

Lines close together indicate a high confidence, while wider spreads signal uncertainty.

Snow Forecast near Willamette Pass

Snow Forecasts for Ski Resorts near Willamette Pass
Ski Area	48 Hr	7 Day	Su	Mo	Tu	We	Th	Fr	Sa
Diamond Peak	6cm 2in	14cm 5in

Snow Reliability

Willamette Pass typically enjoys reliable snowfall, with an average snow depth of 5 to 10 feet throughout the season. For the most current snow conditions, including snowfall updates, check J2Ski for the latest information.

Off-Piste Safety in Willamette Pass

Before skiing or snowboarding off-piste in Willamette Pass, you must assess the local snow conditions. Always check the local Avalanche Risk Level and ski with appropriate safety equipment.