The average lender hasn't seen even an eighth of a point of weakness from morning rate sheet print times. In fact, with highs around 103-09 and lows around 103-06 in Fannie 3.5 MBS, no one is seeing that unless they're looking at several outlying trades. Even then, that would merely be the threshold of negative reprice risk for the jumpiest lenders.
We're merely sending this alert because if you're planning on locking before tomorrow's FOMC Announcement, now's the time. Otherwise, there's nothing new and sinister going on in bond markets that should shake your resolve (assuming you'd mustered the resolve to float through 2-2:30pm tomorrow already!).