La Nina is the cool phase of the El Nino-Southern Oscillation, a naturally occurring global climate pattern that involves changes in wind and ocean temperatures in the Pacific and can cause extreme weather across the planet.

In general, La Niña brings colder than normal temperatures across western Europe. Forecasters are expecting that temperatures will drop on the continent as we head towards November and December.

Cooler than normal temperatures are common in the northwestern United States and Canada. Warmer than normal conditions are usually experienced in the southern and eastern United States. The jet stream (the path that storms take) usually dissects the Valley which can lead to big temperature swings.

The NOAA’s Climate Prediction Center said that there is a 60 percent chance that a weak La Nina will develop this autumn and could last until March. La Nina is part of a natural climate cycle that can cause extreme weather across the planet and the influence it has on the weather varies based on location and the season.

Part of a natural climate cycle, La Niña can cause extreme weather across the globe. It's the cool phase of the El Niño/Southern Oscillation (ENSO), which is a naturally occurri

The emergence of a La Niña weather pattern could have an impact on the types of winter weather conditions we see in the U.S., including NYC. Here's what to know.

NOAA’s Climate Prediction Center forecasters said they still expect a La Niña to develop during the fall and play a role in temperatures and precipitation trends across the country. However, the La Niña that develops is expected to be weak and short-lived,