The unusually warm December weather, with temperatures reaching 55 degrees in the northern Midwest, is attributed to a strong El Niño event, which disrupts the ocean-atmosphere system in the Tropical Pacific and impacts global weather patterns. This phenomenon has contributed to warmer winters in Europe, with notable lack of snow in major cities like Berlin, Stockholm, Warsaw, and Helsinki. While global warming is measured in small increments, it can lead to significant local temperature changes, including more frequent or intense El Niño occurrences. Additionally, shifts in ocean currents may affect regional climates, potentially resulting in colder conditions in areas like Great Britain. The current warm temperatures are partly due to the thermal effects of warmer ocean waters associated with El Niño, which have prevented Arctic air from moving southward.