A Pineapple Express type of atmospheric river storm will bring mostly rain to Northern California through Wednesday, potentially triggering flooding in areas that received snow last week.
Pineapple Expresses are long, narrow plumes of water vapor in the atmosphere with origins near Hawaii or other parts of the tropical Pacific. Because of their warm origins, Pineapple Expresses often bring above-normal temperatures to California and push the rain-snow line above most Sierra Nevada ski resorts.
This week’s Pineapple Express will send the rain-snow line as high as 10,000 feet in the Tahoe region, meaning most of the precipitation will fall as rain…