Happo One 7-Day Snow Forecast

Happo One Long-Range Snow Forecast Updated today

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Updated 02 May 2026 03:43 PDT

Long-Range Snow Forecast for Happo One

Long-range (14 to 45 days) from 2 May.

For Forecast detail, see below.

Happo One Snow Forecast Highlights

When will there be fresh snow in Happo One?

Happo One Snow Forecast Highlights - JMA
Snowfall prediction at mid-mountain (4,250ft)
Next Snow?
There is no snow currently in the forecast for Happo One.

Long-range Snow Outlook for Happo One

Snowfall

Snow Line

Max 76°F
Min 39°F

2in New Snow

Snow Line from 5,522ft to 4,462ft, with rain below.

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Happo One 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 Happo One from OpenMeteo(JMA)
	Snow and Weather	Temp Town
Sat 02	Clear sky.	Max 64°F Min 52°F
Sun 03	Cloudy at altitude, clear spells below.	Max 67°F Min 49°F
Mon 04	up to 1in New Snow Snow showers at altitude, rain showers below. Snow Line from 5,522ft to 5,118ft, with rain below.	Max 70°F Min 44°F
Tue 05	up to 1in New Snow Clear sky. Snow Line from 4,915ft to 4,462ft, with rain below.	Max 64°F Min 39°F
Wed 06	Clear spells.	Max 68°F Min 44°F
Thu 07	Clear sky.	Max 76°F Min 42°F
Fri 08	Cloudy.	Max 71°F Min 45°F

This Snow Forecast for Happo One, Japan 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 Happo One, on any given trail 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.

Happo One Snow Forecast updated at 03:43 PDT, next update expected imminently.

Ensemble forecast for Happo One, Japan at 2,493ft

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.

Japan Hotels Map

Snow Forecast near Happo One

Snow Forecasts for Ski Resorts near Happo One
Ski Area	48 Hr	7 Day
Myoko Suginohara	-	2in
Tsugaike Kogen	-	1in
Hakuba 47	-	-

Snow Reliability

Happo One typically enjoys reliable snow conditions, with an average snow depth of 3 to 4 meters during peak season. For the latest snow reports and updates, check J2Ski.

Off-Piste Safety in Happo One

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