Why do my tomatoes do this? It seems no to effect the first fruit but is now showing up.
Crow Wing County Minnesota tomato problem
Hi and thanks for sending a great photo. The problem is called catfacing. Here is a link with more information but it is basically caused by problems when the pollination is occurring. Sometimes cool weather or blossom damage, etc.
So this odd MN weather is probably to blame. Maybe you had hail storms or some of the big temperature swings during pollination.