Flowering guess yield on this

[jamk911]

is there a way to predict end yield when you are about halfway into flower? ... i am 5 weeks into flowering today.. and just trying to get my ducks in a row for my end yield.. plus be nice to know...
Any help..? Or rough estimates would be nice.. thanks guys and gals!
My plants are roughly 6 feet tall.. one plant has one cola that is 7 feet though.. wanted to say the size .. since pictures can be hard to distinguish this . here are pics..

 

[One drop]

Nope just ride it out there going to be lots if your plants are big . regards OD.