Your velo is well above average for your age (actually on the high end for 16yo). I'm not sure what you mean by will scouts look for this? You need to a few years older to get attention from scouts, also should be throwing 90 consistently (assuming you mean MLB scout). I'm also split on the 2sm fastball.. yes scouts like movement on pitches however, there are sources saying that opponents batting average is highest against 2sm fastballs.
Anyways, it seems like you are at a good stage being well above average for velo and only 140lbs which indicates most of your velo is from good genetics. Hence over the next 3 years you should attempt to go from 140 -> 190, and that should really help making that jump to 90mph @J23