It's called the "Witch of November," and it's casting its spell on millions — threatening severe gusty winds and thunderstorms across the Upper Midwest and Ohio Valley through Friday.
The November Witch is what meteorologists call the powerful low-pressure weather system that's already spawned 10 suspected tornadoes, flooded streets and knocked out power to tens of thousands across Iowa, Nebraska and Missouri. Parts of the Rockies saw up to a foot of snow Wednesday.
The phenomenon — which is brewed up when intense low pressure clashes with a pocket of high pressure — is what sank the ship memorialized in "The Wreck of the Edmund Fitzgerald" 40 years ago.
It was forecast to move into southwest Minnesota and eastern South Dakota early Thursday before clobbering the Great Lakes, the northern Plains and the Ohio, northern Mississippi and Missouri valleys.
By Friday, remnants are expected to still be causing high winds as far east as northern New England. Several more inches of wet, lake-enhanced snow could accumulate in the Lake Superior region.