El Niño is a weather pattern that occurs every few years, characterized by warmer-than-average sea surface temperatures in the Pacific Ocean.
This year's El Niño is expected to be weak, but it could still have an impact on winter weather in the Midwest.
Forecasters predict that El Niño could bring above-average precipitation to Illinois and St. Louis this winter.
However, it's unclear whether that precipitation will come in the form of rain or snow.
Temperatures are expected to be above average as well, which could mean more rain than snow in some areas.
Overall, the impact of El Niño on winter weather in Illinois and St. Louis is uncertain, and forecasters caution that their predictions could change.
Residents of these areas should stay tuned to weather updates and be prepared for a range of winter weather conditions.