Last week, NOAA’s Climate Prediction Center (CPC) issued their forecast for December. Warmer than normal temperatures are expected in the most of the southern tier of the nation, especially the Southwest. Cooler than average readings are possible along the Canadian Border in the Northwest. A wetter than normal month is expected from the Pacific Northwest to the Great Lakes. Below normal precipitation is in the forecast for December in most of the southern tier of the country, especially the Southeast.
The CPC states that the outlook was based on model forecasts, long-term atmospheric trends, and the onset of La Nina (which was announced earlier in the month). La Nina (translated from Spanish as “little girl”) is a natural ocean-atmospheric phenomenon marked by cooler-than-average sea surface temperatures in the central Pacific Ocean near the equator, the opposite of El Nino (“little boy”).
Typical La Nina patterns during the winter months include above-average precipitation and colder-than-average temperatures along the northern tier of the U.S. and below-normal precipitation and drier conditions across the South.
For WeatherNation: Meteorologist Mace Michaels