Seasonal context
El Niño winter 2026–27: southern storm track, floods and coastal storms
What NOAA’s September outlook says, why a southern storm track matters, and why seasonal odds cannot forecast your next flood or snowstorm.
By OH HAIL NAH!! Weather · Sources reviewed September 23, 2026
What NOAA said in September 2026
NOAA CPC’s September 10 ENSO discussion reported strengthening El Niño and greater than 90% odds of a very strong event during fall and winter 2026–27. Those odds describe the tropical Pacific ENSO event—not a 90% chance of severe weather in your town.
The September 17 seasonal discussion favors a wetter pattern across much of the southern and central United States, extending along the Atlantic coast, through portions of late fall and winter. This page summarizes that dated forecast. Check the linked CPC products for updates; the next ENSO discussion is scheduled for October 8 and the next seasonal outlook for October 15.
Why the southern storm track matters
El Niño can influence the jet stream and favor a more active southern storm track. The September outlook connects its wet signal with the mean subtropical jet and storm-track position. For the Mid-South, this is useful preparation context, not a forecast of a particular overnight storm.
Seasonal outlooks compare three-month temperature or precipitation totals with normal. Above-normal precipitation odds do not specify how many storms will occur, whether rain arrives steadily or in bursts, or which neighborhood floods.
Floods, coastal storms and winter precipitation
A wet season can make flood readiness especially useful, but an actual flood depends on storm rainfall, ground conditions, terrain, drainage and water levels. Use shorter-range forecasts and current warnings for evacuation or travel decisions.
Coastal impacts depend on the track and strength of individual systems and local water conditions. El Niño alone cannot establish a storm-surge height, landfall date or coastal flood warning. Likewise, snowfall requires cold air and the right storm track; seasonal rain odds are not snowfall totals.
What to do with the outlook now
Review your household alert setup and higher-ground plan. Keep local forecast links handy and reassess plans when a specific system enters the forecast. Treat comparisons with past El Niño winters as context, not a replay schedule.
The practical takeaway is preparedness across the season. Do not use an ENSO forecast to cancel a warning, guarantee a quiet week, or claim that a particular damaging event will happen.
Official sources
Forecast pages change. Dates in this guide identify the outlook discussed; follow the source links for the latest version.