Note this information is based on 15 Z as 18 Z will not be available until an hour after 18 Z
As of 15 Z this invest is in 10-20 knots of shear with the best convergence off to its west. So at that time it was not in an area of good convergence. Divergence is a different story however. The vorticity area is elongated and stretched out.
You can see on the most recent water vapor image that this is another large tropical wave and the system is pretty stretched out. There is some good convection involved but because of the diurnal minimum its not as good as what it was in the overnight period. Movement is due west with this system. Larger systems have a slower time of developing so any development with this system should be slow to occur.
Right now I would put the chances of this developing between 10-20 %
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