La Nina is looking stronger and may last longer than previously forecast. Additionally, the idea that El Nino could regenerate later in 2018 is now less likely. A La Nina global climate is now more certain through the first quarter of 2018.
After a mild autumn and warm start to December the climate pattern reverses much colder as a “polar vortex” regime evolves in 9-10 days lingering into middle December. Early season chill especially in the Midwest with widening/deepening snow cover is expected.