SOUTH LAKE TAHOE, Calif. (Jan. 12, 2026) – Ski California, the industry association representing 36 downhill and cross-country ski areas in California and Nevada, has partnered with OpenSnow as the official source of its snow forecasts. OpenSnow, a trusted source for the most accurate U.S. weather forecasts, snow reports, and AI-powered weather maps, has long been a valued source of Sierra storm forecasting.
“OpenSnow’s lead Sierra forecaster, Bryan Allegretto (BA), has been accurately predicting snowfall for ski areas in California and Nevada for two decades, so aligning with OpenSnow and looking to him as our lead snow forecaster was a natural choice,” said John Rice, Ski California president. “Bryan and his team have built trust not just among skiers and snowboarders, but within the ski industry as a whole, because of their accurate, detailed forecasts.”
On average over the past 10 years, Allegretto’s average forecast variance for each storm is ~1.5 inches. For the better part of the past two decades, his daily, detailed forecasts have become the beacon by which people make informed decisions about where and when they want to recreate in the snow, when to travel or avoid it, when the best conditions will occur for resorts to make snow, or how the weather might impact resort operations.
“Our intention has always been to provide skiers, snowboarders, and ski area operators and their teams with the most accurate snow forecasts possible,” said Bryan Allegretto, OpenSnow’s CA/NV forecaster and lead forecaster for Ski California. “To us, aligning with Ski California and producing their official snow forecasts means the industry knows both they and their guests can rely on the accuracy of our forecasts.”
OpenSnow continues to enhance its forecasting capabilities, and this winter launched first-of-their-kind new tools that leverage AI machine learning to transform how everyone plans around weather. Some of the most valuable to the California and Nevada ski industry are PEAKS, the new AI model that is up to 50% more accurate in providing location-specific forecasts in mountainous terrain, the new snowmaking wet-bulb temperature forecast, and forecast snowfall maps.
Follow BA’s Sierra forecast here, and his team’s Mammoth Mountain forecast here.
About Ski California
Ski California® (aka California Ski Industry Association®) is a 501(c)(6) non-profit trade association representing 36 ski resorts in California and Nevada. The organization develops and maintains strong relationships with government officials, tourism groups, media, and ski industry leaders to advocate for industry-related initiatives and perspectives that affect mountain communities and businesses. Ski California also provides industry education and researches, analyzes, and pursues safety while preserving the integrity of mountain sports and the natural environment in which they are enjoyed by millions each year. Watch What is Ski California, view Ski California’s award-winning Mountain Safety Guide, and visit skicalifornia.org plus the Ski California Newsroom for more information.
About OpenSnow
Since 2011, OpenSnow has been a trusted source for the most accurate U.S. weather forecasts, snow reports, and now, AI-powered severe weather maps. The platform pairs expert meteorology with advanced modeling to deliver clear, actionable insights for millions of everyday users and professionals who depend on precise weather information. Learn more and download the free OpenSnow App at opensnow.com.