What are some good indicators that the Fall flow is approaching in middle Tennessee (Nashville/Hendersonville)? I've been feeding with supers on so they'll draw comb, but I'm sure I'll end up with some sugar syrup stored as well. My plan is to stop feeding and extract the sugar syrup just before the Fall flow arrives, then put the supers back on to collect nectar only. At the end of Fall I'll extract again, then put the supers back on and start feeding again to fill the supers for Winter. Is this a sound plan?