Happo One Snow Report and Forecast
Snow Forecast for Happo One
When will there be fresh snow?
This is the Snow Forecast for Happo One, Japan for 16 days from 15 April.
Updated 15 April 2025 11:30 PDT.
| Next Snow Expected | 15 April |
|---|---|
| Next Snow Amount | 5in |
| Next 48 Hours | 5in |
| Next 7 Days | 5in |
| Free Snow Reports by e-Mail | Sign Up for Powder Alerts |
For Forecast detail, see below.
For current snow depths and skiing conditions, see our Current Snow Report for Happo One.
Forecast for today in Happo One
Max 44°F
Min 27°F
Freeze-thaw (spring snow) conditions, with valley temperatures cooling to 27°F and rising to 44°F
Temperature at BaseTemp at Base
Snowfall per hour
Snow Line
Tue
15
up to 5in New Snow
Light drizzle, cloudy, clear spells later.
Snow Line from 4,229ft to 2,556ft, with rain below.
Powder Alert!
Updated 15 April 2025 10:36 PDT
Powder Possible :- 5in of Fresh Snow is forecast for Happo One over the next 2 days.
To get Powder Alerts and Snow Storm Early Warnings by e-mail, Subscribe to our Snow Mail.
Happo One Snow Report
| Upper Snow Depths |
| - |
| Lower Snow Depths |
| - |
| Snow Conditions |
| - |
Happo One 7-Day Snow Forecast Overview
Get this snow forecast by e-mail Join J2Ski's Snow Mail Here
NEW FOR 24/25 - Improved Forecasts for Happo One - high-resolution weather models, updated more often - Subscribe
| Tue 15 | Wed 16 | Thu 17 | Fri 18 | Sat 19 | Sun 20 | Mon 21 | |
|---|---|---|---|---|---|---|---|
| Wind | W F4 | W F4 | SW F2 | SW F2 | SW F3 | SW F2 | |
| 6,007ft | 44°F
 +5in
| 50°F
 | 59°F
 | 61°F
 | 53°F
| 47°F
 | 51°F
|
| W F4 | W F4 | SW F3 | SW F3 | SW F2 | |||
| 4,250ft | 44°F
+5in
| 50°F
| 59°F
| 61°F
| 58°F
| 53°F
| 54°F
|
| W F4 | W F4 | ||||||
| 2,493ft | 44°F
| 50°F
| 59°F
| 61°F
| 70°F
| 59°F
| 60°F
|
| Snow Line | varying 4,229ft | ||||||
| Max Town | 44°F | 50°F | 59°F | 61°F | 70°F | 59°F | 60°F |
| Min Town | 27°F | 35°F | 45°F | 51°F | 47°F | 47°F | 36°F |
This table shows the average forecast snowfall, the maximum temperature, and expected general weather at resort, lower and upper mountain levels. For daily forecast details, see below.
Happo One Medium-Range (7-Day) Snow Forecast Detail
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.
Max 44°F
Min 27°F
Freeze-thaw (spring snow) conditions, with valley temperatures cooling to 27°F and rising to 44°F
Temperature at BaseTemp at Base
Snowfall per hour
Snow Line
Tue
15
up to 5in New Snow
Light drizzle, cloudy, clear spells later.
Snow Line from 4,229ft to 2,556ft, with rain below.
Max 50°F
Min 35°F
Valley temperatures from an overnight low of 35°F to daytime highs around 50°F
Temperature at BaseTemp at Base
Wed
16
Snow unlikely
Light drizzle early, then clear sky later.
Max 59°F
Min 45°F
Valley temperatures from an overnight low of 45°F to daytime highs around 59°F
Temperature at BaseTemp at Base
Thu
17
Snow unlikely
Clear sky, clear spells, clear sky later.
Max 61°F
Min 51°F
Valley temperatures from an overnight low of 51°F to daytime highs around 61°F
Temperature at BaseTemp at Base
Fri
18
Snow unlikely
Fair first, light drizzle then rain showers, cloudy later.
Max 70°F
Min 47°F
Valley temperatures from an overnight low of 47°F to daytime highs around 70°F
Temperature at BaseTemp at Base
Sat
19
Snow unlikely
Fair early, then cloudy later.
Max 59°F
Min 47°F
Valley temperatures from an overnight low of 47°F to daytime highs around 59°F
Temperature at BaseTemp at Base
Sun
20
Snow unlikely
Light rain, thunderstorms, clear spells later.
Max 60°F
Min 36°F
Valley temperatures from an overnight low of 36°F to daytime highs around 60°F
Temperature at BaseTemp at Base
Mon
21
Snow unlikely
Fair early, then fog later.
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 11:30 PDT, next update expected 14:00 PDT.
Snow Forecast near Happo One
| Snow Report and Forecast | 48 Hr | Tue | Wed | Thu | Fri | Sat | Sun | Mon | 7 Day |
|---|---|---|---|---|---|---|---|---|---|
| Hakuba 47 | 4in | 4in | |||||||
| Hakuba Norikura | 1in | 1in | |||||||
| Tsugaike Kogen | 1in | 1in |
Understanding and predicting Snow Conditions in Happo One
Here are our tips for making the most of a trip to Happo One, with the help of the J2Ski Snow forecasts and reports. You can find some great skiing in Happo One, but like any mountain, snow conditions change throughout the season, from day to day, and even from hour to hour.
Whether you’re sticking to the marked pistes or venturing off-piste, here’s what you need to know:
Pistes (Groomers) or Off-Piste
These can be a world apart, regarding snow conditions, even ignoring the difference between the natural terrain features to be found off-piste and the generally controlled surfaces and slopes of a pisted (groomed) run.
- Piste Conditions can range from fresh powder to firm, icy surfaces, particularly after warm spells or a busy day on the mountain with the passage of many skiers.
- Off-Piste Conditions are far more variable. Wind and sun can quickly transform fresh snow into wind crust or slushy layers, whilst cold weather can preserve stashes of powder many days after a snowfall.
WARNING - skiing off-piste (out-of-bounds) at Happo One is uncontrolled and un-marked slopes are not made safe (from avalanche risk) or patrolled. Always check local advice, know the Avalanche Risk Level, ski with safety kit (and know how to use it), and never ski alone.
Analyzing Weather and Snowfall Forecasts
Whilst no forecast can tell you exactly how snow conditions in Happo One will develop, checking the forecast regularly should give you an idea of what to expect.
New snowfall can bring fresh powder and refresh the surfaces of pisted runs. Powder can be tracked out quickly at busy times, but in less crowded and shaded areas, fresh snow can linger for days.
Changes in weather conditions, such as milder temperatures, rain or wind, can degrade snow quality. Conversely, cold, stable weather can preserve conditions for extended periods.
Predicting Future Snow Quality
Regularly check our snow and weather forecasts for Happo One for changes that may affect snow quality. Forecast snowfall depth and recent snowfall are good indicators of what to expect.
Use historical data and recent snow reports to understand past snow conditions and anticipate future changes.