“ Until maybe 3-6 months ago, I’d never heard this term. ”
It was used when I lived in California in the 80’s.
It’s a term that actually describes something fairly accurately and isn’t all that hyped.
When an extreme amount of moisture flows in in a narrow section of the atmosphere ; just like a river.
Yes, I knew that the term itself was relatively benign, but of course, now it always has to be associated with, and blamed on, “climate change”.