But if I get this right, he doesn't have to actually "see" his shadow. He just has to cast a shadow. So if it's sunny on groundhog day, 6 more weeks of winter.

Whatever. It's been fall and spring here all winter.

Here also !

There's always six more weeks of winter after groundhog day, no matter what anyone says.

When Newt Gingrich sees his shadow, he thinks it's night.