Full Breakdown
El Niño Shapes the 2026-27 U.S. Winter Outlook
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Core Event: Seasonal Forecast Highlights
On October 15, 2026, NOAA released its three-month outlook for December 2026-February 2027. Driven by a record-strength El Niño, the forecast calls for warmer-than-average temperatures across most of the northern United States and wetter-than-average conditions across the southern tier and the East Coast. Forecasters note the temperature shift will likely reduce snow in traditional “snow-belt” regions while increasing rain and mixed precipitation.
Background & Context
El Niño is a temporary warming of sea-surface temperatures in the central/eastern equatorial Pacific. Strong events push the jet stream southward and eastward, altering storm tracks. This El Niño is projected to exceed the 2 °C threshold that defines a “super” El Niño. Historical analogues (1982-83, 1997-98, 2015-16) show mixed snow outcomes, underscoring forecasting uncertainty.
Data & Statistics
- Temperature: Above-average warmth favored for the Pacific Northwest, northern Rockies, Midwest, Mississippi Valley, much of the East, Alaska, Puerto Rico, and the U.S. Virgin Islands. Near-normal in parts of the Southeast, including Florida.
- Precipitation: Wetter-than-average likely from the Southwest through the Southeast and along the East Coast; drier-than-average odds for Hawaii, much of Alaska, the northern Mountain West, parts of the Great Lakes, and the western Pacific islands.
- Drought Outlook (Oct 15 2026 – Jan 2027): Improvement expected for the Southwest, Southern Great Plains, Southeast, and portions of the East Coast; worsening favored in the northern Rockies, northeastern Oregon, and eastern Washington.
- Regional Snow Expectations: Private forecasters predict below-normal snowfall for Chicago, Boston, New York, and Philadelphia—about half of normal. Salt Lake City is the only major metro forecast to receive above-normal snow. Denver is projected to see 10-18 days with >= 2 inches of snow, versus a historical average of 9 inches.
- Coverage: 41 of the lower 48 states are forecast warmer than normal; no state cooler than average.
Official Statements & Responses
“As we know from decades of observations, a very strong El Niño will likely bring a southward and eastward shift to the jet stream for the contiguous U.S., tilting the odds toward stormier weather across the South,” — Ken Graham, weather service director.
“We anticipate drought conditions to improve or end for western Oregon and Washington, the Southwest, the central and southern Rockies, the southern Great Plains, the lower Mississippi Valley and areas in the east,” — Jon Gottschalck, branch chief.
James Belanger, vice-president of meteorology for the Weather Company, described the upcoming season for snow-seeking regions as “really difficult for them to find what they’re looking for.”
Judah Cohen, MIT research scientist, warned that “we have no real historical analogue or precedent.”
Conflicting Reports & Gaps
- Snowfall Forecasts: NOAA states seasonal snowfall amounts are not predictable beyond a week, yet private firms issue quantitative reductions for specific cities, creating a gap between federal guidance and commercial forecasts.
- Precipitation vs. Snow: The outlook predicts wetter conditions for the South, but the exact form (rain vs. snow) depends on temperature fluctuations the seasonal model cannot resolve, leaving uncertainty for snow-dependent regions.
What’s Next
NOAA will release its next three-month outlook on November 19. The National Weather Service plans to operationalize its Probabilistic Precipitation Portal and to employ “Particularly Dangerous Situation” wording in select blizzard and ice-storm warnings throughout the winter.