When To Start Searching For W Quarter?

I've been hitting banks hard trying to get into rolls with the new design, but although I have found a ton of Lowells and a few WAP's, I have not even found any of the AMP design in the W mint mark yet, so I don't think my area will see them soon. probably not for another month but I will let you know if I see them.

All of the W Lowell's that I have gotten were mixed in with full rolls of the American Memorial Park design, since it seemed like the W Lowell's didn't make it to the mint or Loomis to get mixed in with the Lowell P mint mark coins. They mixed them in with the next design. But then all of the War in the Pacific W coins I have found have been in P mint rolls of the same design. Weird. So I am still searching for AMP W's and the new design W's too.

All the time is the best time to look for the Ws!
You won't find them if you don't look for them, I've struggled with older BU boxes for the last month, but when the new BU boxes turn up you can get many examiles per box. I've had luck for Ws out of mixed reroll boxes and even customer wrapped rolls by now too. So I'd say the best time to look is now untIL the end of next year.
I'm still getting BU boxes of the last two designs from last year and I expect well into next year the 2019 BU boxes with Ws will still be turning up. There will be misses but the hits will eventually happen if you keep looking.

Nice finds!