WASHINGTON, July 7 (San Diego News Online) — NOAA forecasters say El Niño is already in place and is expected to strengthen through the Northern Hemisphere winter of 2026-27. The Climate Prediction Center issued an El Niño Advisory on June 11, and its latest outlook says the warming pattern in the equatorial Pacific could become very strong by November-January. For people in coastal areas, the practical step is to keep checking local flood forecasts and NOAA seasonal outlooks, because El Niño can raise the risk of high-tide flooding in some U.S. locations.
What NOAA is seeing
The Climate Prediction Center says above-average sea surface temperatures have developed across the central to eastern equatorial Pacific Ocean. In its latest weekly update, the center reported a Niño-3.4 index of +0.7°C, with Niño-4 at +0.7°C and Niño-1+2 at +2.1°C. Those values measure how much warmer or cooler the Pacific is than normal. Positive numbers mean the ocean is warmer than average, which is one of the main signs of El Niño.
What El Niño means
El Niño is the warm phase of ENSO, short for El Niño-Southern Oscillation. ENSO is a recurring climate pattern in the tropical Pacific Ocean. When the water in that region warms enough for long enough, it can change winds and weather patterns far beyond the Pacific.
NOAA’s advisory is a seasonal forecast, not a storm warning. It does not mean every place will see the same weather. El Niño can tilt the odds toward certain temperature and rain patterns, but local conditions still depend on many other factors.
How strong could it get?
NOAA says its North American Multi-Model Ensemble, including the NCEP CFSv2 model, points to further strengthening this winter. The center says there is a 63% chance of a very strong El Niño during November-January. That would put the event among the largest in the historical record going back to 1950, according to NOAA.
Why it matters
For Washington, D.C., the main takeaway is that El Niño is a national and global weather signal, not a local emergency by itself. The pattern can influence winter weather over large areas of the United States, and NOAA’s Ocean Service says it can also contribute to more high-tide flooding in some places.
That means people who live near the coast should pay attention to local tide forecasts, flood advisories and NOAA updates as winter approaches. In the nation’s capital, the story is less about a single hazard and more about watching a broad climate pattern that can shape the season ahead.
