El Niño

El Niño is a climate phenomenon characterized by the periodic warming of the sea surface temperature in the central and eastern equatorial Pacific Ocean. It is one phase of a larger climate pattern known as the El Niño-Southern Oscillation (ENSO), which also includes its opposite phase, La Niña. El Niño events occur irregularly, typically every two to seven years, and can last for several months.

Chicago is under a tornado watch and severe thunderstorm warning.

Chicago is under a tornado watch

The City of Chicago, state of Illinois, is under a tornado watch as a cold front sweeps through the region. Severe storms triggered a tornado warning in the Chicago area on Tuesday evening, February 27, with at least five tornado sightings reported by the National Weather Service.