Jeez, looking at these as someone terrified of fairly mild turbulence, I would be taking a boat over the Pacific at the moment
Japan / Asia Turbulence Maps - 00 UTC - Turbulence Forecast
I'd heard this about not routing into severe turbulence before, but looking at these I see that would ground pretty much anything between North America/Asia. So how, as pilots do you attempt to avoid it, given that this isn't associated with storms you can see on the radar? Some of these show it from FL460 downwards, leaving nowhere above or below. Is there an element of luck? Can you use general observations of wind patterns to assess where shear might be? very interested to know.