Thanks for the post; was wondering about aviation impacts of this weather phenomenon. Drifting (or blowing) off topic maybe: I've been following atmospheric rivers for a few years. Now with the "bomb cycle" it gets interesting. Below is a link to a graphical weather site for watching these in action, along with an attached screenshot from 10/25 7:00 PDT.
The atmospheric river sometimes looks like a finger of fate pointing at your city or destination. Today it's pointing at California, while there's a less defined whirlpool-like formation offshore of the PNW. Here in Portland the wind's been blowing and gusting all day and all night.
https://tropic.ssec.wisc.edu/real-ti...hrs&anim=html5