>>2669177>dont know how the pnw fits into all of thisLots of moisture comes off the pacific ocean. Most of it falls as rain west of the cascades (or snow on its peaks). A little moisture makes it over, but not much falls as rain until it reaches the Rockies.
>its just when you call it aridIt's a fairly reasonable term for it, though "semi-arid" is probably more accurate for most of the west. Pic-related includes an American map from 1893.
Another anon posted the modern/accurate precip map here (
>>2666815)
