You may have heard meteorologists using the phrases "atmospheric river" and "Pineapple Express" when talking about wet weather in California, but what do they really mean?
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.
SAN FRANCISCO – A series of atmospheric river events promise to deliver heavy precipitation across ... Forecasters say because the air mass originates near Hawaii, which is commonly referred to as a ...