Winter 2024 2025 Forecast. Federal forecasters expect a la niña climate pattern to form in the coming months, according to a report released thursday — offering a potential picture of what the weather could look like. The astronomical start of winter begins with the winter solstice on saturday, december 21, 2024.
Negative anomalies and cooling are. Below is an analysis/forecast image from nmme, which shows the enso ocean temperature drop as the warm phase ended in spring.