Pineapple Express

Pineapple Express is a non-technical term for a meteorological phenomenon, a specific recurring atmospheric river characterized by a strong and persistent large-scale flow of warm moist air, and the associated heavy precipitation both in the waters immediately northeast of the Hawaiian Islands and extending northeast to any location along the Pacific coast of North America. A Pineapple Express is an example of an atmospheric river, which is a more general term for such relatively narrow corridors of enhanced water vapor transport at mid-latitudes around the world.

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“Pineapple Express” – Atmospheric River Drenches California, Blasting Hazardous Winds