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winter usa

Winter 2026–2027 Forecast Update: Super El Niño Nears Historic Territory, Snowfall Outlook and Polar Vortex Risk

NOAA now gives a 75% chance that the October–December 2026 RONI reaches at least +2.5°C as El Niño strengthens toward a potentially historic peak. Updated ECMWF SEAS5 forecasts show a wet southern U.S. storm track, warmer Canada and northern U.S., mixed snow risks across the East, and a predominantly mild winter pattern across Europe.

Winter 2026–2027 Forecast Update: Super El Niño Nears Historic Territory, Snowfall Outlook and Polar Vortex Risk Read Post »