A Record-Breaking El Niño Is Building. Here's What NOAA Says It Means for Your Winter

If this winter feels strange where you live, there is a good chance a patch of ocean thousands of miles away is to blame.

An unusually powerful El Niño is building in the tropical Pacific, and forecasters on both sides of the ocean are calling it historic. On October 16, NOAA released its official U.S. Winter Outlook, and the message was clear: this El Niño is likely to shape the season from December through February.

Here is what is happening, what it could mean for your region, and what you can do now.

How strong is this El Niño?

El Niño happens when sea surface temperatures in the central and eastern tropical Pacific run warmer than normal. That warm water shifts weather patterns around the world.

This year the numbers are striking:

• Japan's weather agency reported that in September, its El Niño monitoring area was 4.0°C (7.2°F) above normal, the highest value since its records began in 1949, beating the previous record of +3.6°C set in December 1997.

• NOAA's Climate Prediction Center said on October 8 that there is a greater than 83% chance of a strong-to-very strong event lasting through early 2027, and put the odds of this El Niño exceeding every event since 1950 at 83% for October to December.

• The World Meteorological Organization also warned on October 8 that this could become one of the strongest El Niños since 1950.

What NOAA's winter outlook says

According to the National Weather Service, a very strong El Niño will likely push the jet stream south and east over the contiguous United States. That usually means a stormier South and a milder North.

Likely wetter than normal

• The South and Southwest

• Much of the East Coast

Likely drier than normal

• Hawaii and much of Alaska

• The northern Mountain West and parts of the Great Lakes

Likely warmer than normal

• The Pacific Northwest and northern Rockies

• The Midwest and Mississippi Valley

• Much of the East, and Alaska

Notably, NOAA's outlook did not favor below-average temperatures for any region.

Good news, and a warning

The extra rain could ease drought in parts of the Southwest, Southern Plains, Southeast and East Coast. But NWS Director Ken Graham warned that too much rain falling on dry soil can fuel flash floods and mudslides.

And a milder winter does not mean no winter. Forecasters at AccuWeather expect below-normal snowfall for cities like New York, Chicago and Boston, but cautioned that a single big storm can change the whole picture, especially on the East Coast in late January and February.

5 smart moves before December

1. If you live in the South or along the East Coast, clear gutters and storm drains now and check that your sump pump works.

2. Look up your flood risk. Many standard home insurance policies do not cover flood damage, and flood policies often have a waiting period before they take effect.

3. Do not skip winter prep in the North. A warm average still includes cold snaps. Keep an emergency kit in your car.

4. Planning a ski trip? Snow may be less reliable in some northern areas, so look for flexible booking.

5. Follow your local forecast, not just the seasonal outlook. Seasonal outlooks show odds, not guarantees. CPC itself says impacts are more likely with a strong event, but not assured.

The bottom line

This may be one of the strongest El Niños in modern records. For much of the U.S., that points to a wetter South, a milder North and a winter that behaves differently from what you are used to. Prepare for the likely pattern, but stay ready for the storm that breaks it.

What does winter usually look like where you live? Tell me in the comments, and let us compare notes in February.

This story was written with the help of AI tools. Sources: NOAA 2026-2027 U.S. Winter Outlook (October 16, 2026), NOAA Climate Prediction Center update (October 8, 2026), Japan Meteorological Agency El Niño Outlook (October 9, 2026), World Meteorological Organization, and reporting by FOX and Newsweek.