Atmospheric rivers happen all over the planet, but a Pineapple Express refers to a specific recurring atmospheric river that hits the U.S. West Coast.

Atmospheric river. Pineapple express. Jet stream. You’ve seen the terms — but what do they all mean? An atmospheric river — a term first coined in the 1990s — is a long, narrow stream in ...

The storm that pummeled California this week was fueled by an atmospheric river, a plume of moisture that extended across the Pacific to near Hawaii. Here's a look at the phenomenon.

"The Pineapple Express is an atmospheric river which has its origin in the tropical Pacific," said AccuWeather Senior Meteorologist Alex Sosnowski.

Back-to-back storms that pummeled the West Coast this week flowed along the Pineapple Express. A powerful atmospheric river affecting the West Coast was captured in this enhanced-color Air Mass ...

A well-known example of a strong atmospheric river is called the "Pineapple Express," which is capable of bringing moisture from the tropics near Hawaii over to the West Coast of the U.S.

What is a pineapple express? A pineapple express is a particular kind of strong atmospheric river. It brings in water vapor from the tropical Pacific Ocean, near Hawaii, to the American West Coast.

The second atmospheric river, expected to move in late Saturday, is already predicted to be “the largest storm of the season,” according to the National Weather Service.

An atmospheric river event known as the “Pineapple Express” is forecast to bring a prolonged period of wet weather and the potential for avalanches to Washington and Oregon beginning Sunday.

Another atmospheric river is expected to hit the West Coast as "Pineapple Express" heads eastwards. NBC News meteorologist Angie Lassman has the forecast on Early Today.

"Pineapple Express" is a term that you may have heard. It's used when an atmospheric river originates near Hawaii. Warm and moist air near Hawaii is lifted and transported.