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11/17/2025, 4:30 am EST
The upper air pattern projected across Europe during the next 1-2 weeks features a deep upper-level low-pressure trough causing chilly weather for the next 10 days (at least) and excessive rainfall capable of producing flooding in parts of central, south, and southeast portions of Europe. Heavy snows are likely in the South-central Europe mountain areas, and the wet regime extends eastward to include Ukraine.
11/16/2025, 12:19 pm EST
Typical of a La Nina climate, the Northwest U.S./Southwest Canada to North-central U.S. are usually the first winter targets for cold and snow. The NOAA/CPC risk of heavy snow ALERT for the last week of November indicates heavy snow risk for the Continental Divide and North-central U.S. likely to sustain following cold.
11/13/2025, 8:39 am EST
The approach of December brings developing and widening Great Plains snow cover, a mostly drier than normal to above normal rainfall pattern change in Brazil, and arrival of snowfall across the bare ground in the northern half of Europe.
11/12/2025, 3:43 pm EST
The outlook valid through FEB-26 includes a stormy winter across the Northern U.S. while the southern portion of the U.S. is dry. In South America, dryness generates in Northeast Argentina/Southeast Brazil plus Northeast Brazil. Wet weather is likely for northwestern South America.
11/11/2025, 4:44 am EST
Typhoon Fung-Wong peak intensity was 943 MB supporting a category-4 typhoon east of the Philippines. Does heat release from weakening Fung-Wong influence the polar climate mid-to-late November? Partially, but with significant help from warming over Greenland already in-place due to effects from Category-5 Major Hurricane Melissa (892 MB). Gradually, the polar region high pressure block expands and causes a cold trough in the U.S. for December.
Climate Impact Company Chart of the Day
La Nina Gaining Strength
La Nina suddenly displays life with notable strengthening during the past 1-2 weeks. All Nino SSTA regions are within the La Nina threshold. The catalyst to the cooler change is a consistent and strengthening positive phase of the southern oscillation index (+SOI) causing a steady increase in up-welling trade winds and shifting the global climate convincingly into a cold ENSO regime.
Climate Impact Company Climate Diagnostics
Chicago and Boston Winter 2025-26 Snowfall Forecast
The projected SSTA regime and SSW risk are found in 7 different analog years in the modern climate era (since the mid-to-late 1990’s). Each year has an assigned statistical weight based on the strength of the analog. The consensus of the analog years yields an above normal snowfall each month of meteorological winter 2025-26 in Chicago and Boston (except for February).