The more significant Pineapple Express storms can carry as much as the equivalent of 10 to 15 inches of rain. The storm gathers a bunch of warm, moist air near Hawaii and carries it north and east ...

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.

Weather systems that affect the West Coast of the United States often have their origins in the northern Pacific Ocean. This is because the jet stream usually flows in a general west-to-east fashion.