You can now view detailed 11-15 day forecasts for any location on Earth in OpenSnow.

To extend our forecasts out to 11-15 days, we process data from additional models, including the European AI (AIFS Ensemble), American AI (GFS Graphcast), and American Ensemble (GEFS).

Getting Started

1. Go to any location screen.
2. Scroll down under "Weather" or "Snow Summary".
3. View 15-day forecasts.

Weather Models

To extend our forecasts out to 11-15 days, we now process data from additional models.

This ensures that we present a multi-model approach and that you are not misled by the extended forecast from a single model:

• European AI (AIFS Ensemble): 25km resolution. Learn more.
• American AI (GFS Graphcast): 25 km resolution. Learn more.
• American Ensemble (GEFS): 50km resolution. Learn more.

Weather forecasts on OpenSnow also include the following weather model data, with the American (GFS) and European (ECMWF) models providing forecast data out to 15 days.

• American (GFS): 13 km resolution. Learn more.
• American Blend (NBM): 2.5 km resolution. Learn more.
• American Hi-Res (HRRR): 3 km resolution. Learn more.
• Canadian (GDPS): 15 km resolution. Learn more.
• Canadian (RDPS): 10 km resolution. Learn more.
• Canadian Hi-Res (HRDPS): 2.5 km resolution. Learn more.
• European (ECMWF): 25 km resolution. Learn more.
• European AI (AIFS): 25 km resolution. Learn more.
• German (ICON): 13 km resolution. Learn more.
• German EU (ICON-EU): 7 km resolution. Learn more.
• German D2 (ICON-D2): 2 km resolution. Learn more.

Not all models are available for all weather variables or all geographies.

Benefits

The benefits of this multi-model approach include:

• Increased forecast accuracy and confidence from blending multiple global and high-resolution.
  
  
• Reduced the likelihood that you will make a decision based solely on a single forecast from a single model.
  
  
• Improved specificity by adjusting model forecast data for mountain environments, including data such as the snow-to-liquid ratio, precipitation, temperature, and wind speed.
  
  
• The ability to calculate the snow level (elevation that separates rain from snow) to provide a more realistic forecast, especially at the beginning of storms and during times of intense snowfall.
  
  
• The ability to create a forecast for any location (and elevation) to ensure that we are forecasting conditions on the mountain and not for a nearby town.

Data Available

Hourly:

• Snow Forecast
• Snow Ratio
• Snow Level (Rain/Snow Elevation)
• Precipitation Chance
• Precipitation Forecast
• Temperature
• Feels Like Temperature
• Relative Humidity
• Wind Direction, Speed, & Gust
• Cloud Cover
• Lightning Potential

12-hour chucks (day & night):

• Snow Forecast
• Snow Ratio
• Snow Level (Rain/Snow Elevation)
• Precipitation Chance
• Precipitation Forecast
• Temperature
• Feels Like Temperature
• Relative Humidity
• Wind Direction, Speed, & Gust
• Cloud Cover
• Weather Alerts

More Details

This blend of proprietary forecast data is updated hourly on OpenSnow for any location on land, worldwide.

• Blue bars show snowfall under 6 inches.
• Orange bars show snowfall over 6 inches.
• Purple bars indicate mixed precip (rain/snow).

Daily alerts are also included to signal upcoming powder days, along with the potential for rain, snow/rain, and high winds. Alert breakdown:

• Orange = Powder (Forecast of 6+ inches from the previous night and current day)
• Green = Rain (Expect rain on all of the mountain)
• Purple = Snow/Rain (Expect a transition from snow to rain on the mountain)
• Yellow = Wind (Wind gusts greater than 45 mph and possible lift closures)

Use the links below to view the 15-day snow forecast for popular ski resorts around the world:

• Breckenridge, Colorado
• Alta, Utah
• Jackson Hole, Wyoming
• Palisades Tahoe, California
• Revelstoke, British Columbia
• Niseko, Japan
• Chamonix, France
• Zermatt, Switzerland
• St. Anton, Austria
• Cortina, Italy
• Portillo, Chile
• Las Leñas, Argentina
• Perisher, Australia
• Coronet Peak, New Zealand

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Questions? Send an email to [email protected] and we'll respond within 24 hours. You can also visit our Support Center to view more frequently asked questions and feature guides.

Sam Collentine