Coach04 makes an excellent point. The condition you are describing could be a "sport shot".
The Sport Condition is all about learning to bowl on flat lane conditioner with the bowler's skill in modifying ball speed, playing different parts of the lane and choosing the right equipment is truly put to the test.
I work with bowlers that can play a blocked lane condition (house shot) up the boards from the first, second, third or fourth arrows. Then they "belly" the ball across 15 or 20 with little effort. Put them on the sport shot and they must work to find the line, but because they have practiced the different lines, they don't panic and feel better about making big changes to the find the line to the pocket.
What's my point?
Practice playing different parts of the lane. Stand on 12 and shoot at 5, stand on 17 and shoot at 10, stand on 22 and shoot at 15 (playing up the boards). Then move to 30 and see if you can find the pocket across 20.
Make sure you aren't a "one shot" competitor that only wins on one condition. If you practice different lines, you will find yourself smiling when someone complains about lane conditions because you will know how to handle it.
I hope this helps.