http://i183.photobucket.com/albums/x...watermelon.jpg

Is this watermelon ready to pick? Planted this from seed around easter
in the middle of south carolina. The thing that's confusing me is
that the underbelly is already yellow (which i've read means it could
be ripe), but I thought these were supposed to grow for longer. This
is my first time growing watermelon. Thanks.