Just noticed something unusual, when all tropical storms strengthen, the barometric pressure lowers. The lower the pressure, the stronger the storm. Bad ones are usually under 950mb (millibars). Really bad ones are below 900mb.
Ian formed at 1006mb as a tropical depression on the 23rd. It is currently at 1002mb, an insignificant decrease. To reach category 2 strength by tomorrow, there should be a big drop in the pressure to something under 990mb.
We will keep watching those numbers.
