WEDNESDAY: The boundary could advance a bit more toward the SE as moisture continues further north by that time over-riding the boundary. In that regard, the better rain chances tomorrow could be further north and west,, but overall other than some cosmetic low level wind direction changes the mid-upper levels do not change all that much other than that the wind speeds in those levels begin to lower.
THURSDAY-WEEKEND: The boundary by Thursday appears will be all but gone, but moisture persists making for difficult to time rain shower chances, although this could end up being a diurnal cycle showers scenario for the east coast in the early morning shifting west and north during the day time, but not exclusively so.
A frontal boundary is going to be coming together across the Central Portion of the country, but just exactly how or when that boundary will cross Central Florida and the remainder of the state is uncertain considering current timing suggests well out to Monday of next week. In that regard rain chances, although nothing significant is foreseen, remain in the picture up until that time frame. Only the direction from which they come from changes.