This phrase has been popularized of late. It refers to a weather system that is bringing lots of precipitation. It's like a river of water but in the sky or atmosphere. It's what we once referred to as a rain storm or rainy weather. An extended period of rain.
Citizens in western British Columbia are concerned about flooding due to an Atmospheric River heading towards the Province.
by Jazzcat60 November 25, 2021
A seemingly unending flow of diarrhea caused by ingesting contaminated water left untreated after raw sewage flowed from a water treatment plant that was knocked off-line by an atmospheric river.
Kent had an 3-day atmospheric river shit after he made Cincinnati stew at Marc's house during the atmospheric river.
by Hot Franklin January 10, 2023