Fortress Mountain 7-Day Snow Forecast

Fortress Mountain Long-Range Snow Forecast Updated today

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Updated 25 May 2026 05:50 NZST

Long-Range Snow Forecast for Fortress Mountain

Long-range (14 to 45 days) from 24 May.

For Forecast detail, see below.

Fortress Mountain Snow Forecast Highlights

When will there be fresh snow in Fortress Mountain?

Fortress Mountain Snow Forecast Highlights - GEM
Snowfall prediction at mid-mountain (2,205m)
Next Snow Expected	26 May
Next Snow Amount	1cm
Next 48 Hours	2cm
Next 7 Days	3cm

Long-range Snow Outlook for Fortress Mountain

Snowfall

Snow Line

Max 14℃
Min -5℃

2cm New Snow

Snow Line from 2,117m to resort level (2,040m).

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Fortress Mountain 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 Fortress Mountain from OpenMeteo(GEM)
	Snow and Weather	Temp Town
Sun 24	Clear sky.	Max 6℃ Min -3℃
Mon 25	up to 1cm New Snow Clear spells. Snow falling to resort level (2,040m).	Max 4℃ Min -1℃
Tue 26	1cm to 2cm New Snow Light snow. Snow Line from 2,117m to resort level (2,040m).	Max 2℃ Min -3℃
Wed 27	Clear sky.	Max 13℃ Min -3℃
Thu 28	Cloudy.	Max 14℃ Min 2℃
Fri 29	Cloudy.	Max 8℃ Min -1℃
Sat 30	Clear sky.	Max 7℃ Min -5℃

This Snow Forecast for Fortress Mountain, Canada 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 Fortress Mountain, 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.

Fortress Mountain Snow Forecast updated at 05:50 NZST, next update expected 11:00 NZST.

Ensemble forecast for Fortress Mountain, Canada at 2,040m

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 Reliability

Fortress Mountain typically enjoys reliable snow conditions, with an average snowfall of 300 cm annually. For the latest snow depth and conditions, check J2Ski for updated information.

Off-Piste Safety in Fortress Mountain

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