The days of describing weather changes exclusively as seasons, fronts, and storms is over. The term “atmospheric river” comes from more detailed satellite imagery and data models that make it possible to project that relatively thin filaments of atmospheric moisture will lead to precipitation in some places but not in others nearby. Blame the popularity of that and other new and flamboyant weather terms not on the Left but on meteorologists trying to explain to the public what is happening in the skies in greater detail.
Based upon the recent(last week) storm related deaths and traffic issues the sheep are not paying attention.