Winter Outlook 2020-2021
October 15, 2020
Winter outlook forecasts cooler North, warmer South with ongoing La Nina
The NOAA winter forecast for the U.S. favors warmer, drier conditions across the southern tier of the U.S., and cooler, wetter conditions in the North, thanks in part to an ongoing La Nina. Forecasters at the NOAA Climate Prediction Center - a division of the National Weather Service - are also closely monitoring persistent drought during the winter months ahead, with more than 45% of the continental U.S. now experiencing drought.
Currently, large areas of drought extend over the western half of the U.S., with parts of the Northeast also experiencing drought and near-record low stream flows. With a La Nina climate pattern in place, southern parts of the U.S. may experience expanded and intensifying drought during the winter months ahead.
Temperature
The greatest chances for warmer-than-normal conditions extend across the Southern tier of the U.S. from the Southwest, across the Gulf states, and into the Southeast. More modest probabilities for warmer temperatures are forecast in the southern parts of the west coast, and from the Mid-Atlantic into the Northeast. Above-average temperatures are also favored for Hawaii and western and northern Alaska.
Below-normal temperatures are favored in southern Alaska and from the northern Pacific Northwest into the Northern Plains, with equal chances for below-, near- or above-average temperatures in the remaining regions.
Precipitation
Wetter-than-average conditions are most likely across the northern tier of the U.S., extending from the Pacific Northwest, across the Northern Plains, Great Lakes, and into the Ohio Valley as well as Hawaii and northern Alaska. The greatest chances for drier-than-average conditions are predicted in the Southwest, across Texas, along the Gulf Coast, and in Florida.
More modest chances for drier conditions are forecast in southern Alaska, and from California across the Rockies, Central Plains, and into the Southeast. The remainder of the U.S., including the Mid-Atlantic and Northeast falls into the category of equal chances for below-, near-, or above-average precipitation.
Drought
Widespread, ongoing drought is currently in place across the western half of the continental U.S. as a result of the weak Southwest summer monsoon season and near-record high temperatures. Drought is also present in parts of the Northeast, Ohio Valley, Hawaii, and Alaska. The ongoing La Nina is expected to expand and intensify drought across the southern and central Plains, eastern Gulf Coast, and in California during the months ahead. Drought conditions are expected to improve in the northern Rockies, Northwest, New England, Alaska, and Hawaii over the coming months.
Seasonal outlooks help communities prepare for what is likely to come in the months ahead and minimize weather's impacts on lives and livelihoods. Empowering people with actionable forecasts and winter weather tips is key to the NOAA effort to build a more Weather-Ready Nation.