The wet weather fueled by an atmospheric river represents an about-face after a dry January helped ignite fires that ...

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?

A warm, wet storm originating in Hawaii will be pulled north toward California bringing heavy rain and localized flood risk.

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.