El Niño to Shape U.S. Winter with Warmer, Wetter Conditions

This winter in the United States is forecasted to be generally warmer and wetter than usual, primarily due to the influence of El Niño, according to the National Oceanic and Atmospheric Administration (NOAA) and other meteorological forecasters. While increased moisture is expected, higher temperatures may mean less snow for many regions.

Understanding El Niño’s Role in Weather Patterns

El Niño, a natural warming phase in parts of the Pacific Ocean, typically leads to altered weather patterns across the globe. Though these changes can vary widely by region, a strong El Niño gives forecasters more confidence in their predictions. During last Thursday’s media briefing, NOAA officials explained that although El Niño tends to bring more moisture, it also increases temperatures, influencing this winter's overall forecast.

Seasonal Outlook: Snowfall, Temperatures, and Regional Variations

NOAA meteorologists stated that much of the northern United States, including the Northeast, Great Lakes, Upper Midwest, and Northern Rockies, should expect below-normal snowfall. Conversely, some parts of the Southern Rockies, Southeast, and Southwest may experience more snow than usual. Private meteorology firms, such as AccuWeather, echoed this outlook. For example, Salt Lake City is the only major metro area predicted by AccuWeather to receive above-normal winter snow amounts, while cities like Chicago, Boston, New York, and Philadelphia may get half or less of their typical snow.

About 41 of the Lower 48 states are projected to see warmer winter temperatures. No states are anticipated to be cooler than average, although Florida, Louisiana, southern Georgia, Alabama, and Mississippi should experience near-normal temperatures. Forecasts for areas including Texas, New Mexico, Arizona, Utah, Southern California, Nevada, Wyoming, and western Oklahoma, Kansas, and Nebraska indicate equal chances for above-normal, below-normal, or average temperatures.

Danger of Polar Vortex Reduced, Risk of Winter Storms Remains

Jon Gottschalck, a meteorologist and branch chief at NOAA, explained that the dreaded polar vortex—responsible for bringing icy Arctic air into the U.S.—should not occur as frequently as usual. However, Ken Graham, National Weather Service Director, warned that the risk of snowstorms remains: “It only takes one storm to flip the script, especially for the East Coast cities.” AccuWeather’s Paul Pastelok emphasized the possibility of significant Eastern snowstorms in late January and February.

Precipitation Trends: Western Drought Relief, Atmospheric Rivers

NOAA forecasts that parts of 39 states will experience a wetter-than-usual winter, with much of Montana and sections of Oregon, Idaho, Wisconsin, and Michigan potentially drier. Drought improvement is anticipated for western Oregon and Washington state, the Southwest, central and southern Rockies, southern Great Plains, lower Mississippi Valley, and some areas in the East.

Meteorologist Mike Bettes of The Weather Channel noted the likelihood of “numerous, high-impact atmospheric rivers” affecting California, potentially causing extensive flooding and landslides. Atmospheric rivers are narrow but powerful flows of water vapor that can deliver intense rainfall over short periods.

Other Weather Risks: Tornadoes and Snowstorm Uncertainty

No direct predictions for Texas were noted, but regional expectations allow for a mix of potential warm, cold, or normal conditions. Jon Gottschalck added that Florida and parts of the Southeast should remain alert for an increased risk of tornadoes this winter and early spring due to El Niño.

Although this El Niño could reach record levels, Ken Graham cautioned that a strong El Niño does not necessarily amplify its impact but rather makes seasonal patterns more predictable. As always, the unpredictable nature of weather means risks such as snowstorms and other severe events remain possible.

Source: abc7.com.