Invests actually start (and start back over) at "90," so the first Invest in any basin of any year would be "90." Generally speaking, having a feature of interest tagged as in Invest can and does happen at almost any time of the year, so in and of itself an "early" Invest is not worth reading too much into - it may be noteworthy if we do get a pre-season named storm out of it later this month, however.