Forecasters warn of a potentially record-breaking Super El Niño as new maps detail a winter of extreme floods, shifting snow patterns, and temperature anomalies across the United States.
The Pacific Ocean is signaling a change that could rewrite the map of the American winter. After months of tracking a Super El Niño—a phenomenon defined by weakening trade winds and rising sea surface temperatures—meteorologists are preparing for a season that could prove to be the most intense since 1950.
Paul Pastelok. a senior meteorologist and long-range forecaster. believes the strength of the signal gives his team significant confidence in their projections for the 2026-27 season. The stakes are high; the 1982-83 El Niño. which this current event could surpass. stands as the most devastating of the century. blamed for roughly 2. 000 deaths and more than $13 billion in damages globally.
While meteorological winter officially begins December 1. the AccuWeather team has spent the last month synthesizing data from more than 100 climate models and historical trends to build their outlook. The findings suggest a stark divide: the southern United States may face a barrage of heavy rain and flood risks. while the northern half of the country prepares for warmer-than-average conditions.
This year’s forecast is complicated by two significant marine heat waves—one near Baja. Mexico. and another in the northwestern Pacific. These anomalies are expected to push the traditional storm track further north than typical El Niño patterns. potentially diverting moisture away from Southern California and toward the Central Sierras. which may see significant snow accumulation. This shift offers a sliver of relief for the Colorado Basin. which is currently grappling with record-low water levels. though the Pacific Northwest can expect a erratic season defined by periods of snow followed by extended dry spells.
For the ski and snowboard industry, the outlook is bifurcated. Resorts in the West, from the Sierra Nevadas to the Rockies, are positioned for stronger conditions. In the East. the outlook is bleaker; while November could bring early snow. a predicted lack of sustainable cold suggests a difficult season where only a few trails may remain viable.
Perhaps the most pressing concern is the threat of flooding. For the first time. forecasters have included a dedicated flood map. warning that the atmospheric rivers typically associated with El Niño could arrive in waves. Instead of a single event. the country could face six. seven. or eight major flooding episodes. with the California coast and the Southeast—specifically above the Florida Panhandle—at the greatest risk. This heavy rainfall carries a secondary danger: the potential for mudslides, particularly in areas scarred by previous wildfires.
Temperature patterns are also trending away from the 2025-26 season, which went down as the second-warmest winter in U.S. history. This year. the Great Lakes region could see temperatures hitting four or more degrees above historical averages. while the southern half of the country settles into a colder-than-normal stretch.
Even without the traditional pull of Arctic air masses—which. when coupled with a wavy polar jet stream. brought frigid conditions to the Northeast last year—the threat of ice remains. Between mid-January and February, even marginal cold could trigger storms across Arkansas, Tennessee, and the Appalachians, threatening power infrastructure.
As the season approaches. the pattern is clear: this El Niño will likely break records. whether through the volume of rainfall. the scale of flooding. or the sheer abnormality of the heat. While the exact path of the coming storms remains fluid. the potential for high-impact events is already etched into the models.
Super El Niño Winter 2026-27 forecast AccuWeather climate change extreme weather flooding snowfall U.S. winter