The National Oceanic and Atmospheric Administration (NOAA) released their annual Winter Seasonal Outlook today; their forecast calls for a variety of weather this winter across the continental United States, Alaska, and Hawaii: drought-busting rains, plenty of heavy snow, and a warmer than unusual Southern region is in the outlook. The major atmospheric influence into the upcoming winter season is the atmospheric phenomena known as La Niña. According to NOAA, La Niña will be returning for the third consecutive winter, driving warmer-than-average temperatures for the Southwest and along the Gulf Coast and eastern seaboard. Starting in December 2022 through February 2023, NOAA predicts drier-than-average conditions across the South with wetter-than-average conditions for areas of the Ohio Valley, Great Lakes, northern Rockies and Pacific Northwest. Where colder than normal conditions are expected over the northern tier, heavy snow is expected.
“The hardworking forecasters at NOAA’s Climate Prediction Center produce timely and accurate seasonal outlooks and short-term forecasts year-round,” said Michael Farrar, Ph.D., director of the National Centers for Environmental Prediction. “NOAA’s new supercomputers are enabling us to develop even better, more detailed forecast capabilities, which we’ll be rolling out in the coming years.”
NOAA forecasters, in collaboration with the National Integrated Drought Information System (NIDIS), continue to monitor extreme, ongoing drought conditions that have persisted in the Western U.S. since late 2020, as well as parts of the central U.S. where historic low-water conditions are currently present.
“Drought conditions are now present across approximately 59% of the country, but parts of the Western U.S and southern Great Plains will continue to be the hardest hit this winter,” said Jon Gottschalck, chief, Operational Prediction Branch, NOAA’s Climate Prediction Center. “With the La Niña climate pattern still in place, drought conditions may also expand to the Gulf Coast.”
Highlights of the outlook call for:
- Wetter-than-average conditions are most likely in western Alaska, the Pacific Northwest, northern Rockies, Great Lakes and Ohio Valley.
- The greatest chances for drier-than-average conditions are forecast in portions of California, the Southwest, the southern Rockies, southern Plains, Gulf Coast and much of the Southeast.
- The remainder of the U.S. falls into the category of equal chances for below-, near-, or above-average seasonal total precipitation.
- Widespread extreme drought continues to persist across much of the West, the Great Basin, and the central-to-southern Great Plains.
- Drought is expected to impact the middle and lower Mississippi Valley this winter.
- Drought development is expected to occur across the South-central and Southeastern U.S., while drought conditions are expected to improve across the Northwestern U.S. over the coming months.
- The greatest chance for warmer-than-average conditions are in western Alaska, and the Central Great Basin and Southwest extending through the Southern Plains.
- Drought conditions will improve across much of Hawaii with a more wet than usual winter wet season expected.
- Warmer-than-average temperatures are also favored in the Southeastern U.S. and along the Atlantic coast.
- Below-normal temperatures are favored from the Pacific Northwest eastward to the western Great Lakes and the Alaska Panhandle.
