My surface water temperature quickly increased and reached 50F yesterday after 2 days of 68-70F air temps. I expect YP eggs Friday or Saturday.
Bill, in your years of observation, do you see the YP spawn correlating to any moon cycle? Dave Willis also noted photoperiod had an effect too, but didn't elaborate on it.
I know that BG and LMB spawn right around the full moon when the water temps are correct.