Space.com notes that Jupiter will stick around for a few days. "For example, on Tuesday night, Jan. 7, observers in eastern North America can see the Red Spot at 6 p.m. in the evening local time, and again, one full Jupiter day later, at 4 a.m. in the morning."
Why the big deal over spotting Jupiter? NASA explained in a weekly blog: "Come Sunday Jupiter will be at opposition -- no, we haven't been arguing. Opposition means that Jupiter, the Earth and the sun will be positioned in a straight line with the Earth in the middle."