Likes science

The original

Category	Winds(mph)	pressure(mbar)
1	74-95	980
2	96-110	979-965
3	111-130	964-945
4	131-155	944-920
5	>155	<920

The patterns

winds(max is easier)
$Cat(x+1)-Cat(x)=y(1)$
$Cat(x+2)-Cat(x+1)=y(2)$
$y(2)-y(1)=5$

110-95=15
130-110=20
20-15=5

130-110=20
155-130=25
25-20=5

pressure(min is easier)
$Cat(x)-Cat(x+1)=y(1)$
$Cat(x+1)-Cat(x+2)=y(2)$
$y(2)-y(1)=5$

980-965=15
965-945=20
20-15=5

965-945=20
945-920=25
25-20=5

The extended

Category	Winds(mph)	pressure(mbar)
1	74-95	980
2	96-110	979-965
3	111-130	964-945
4	131-155	944-920
5	156-185	919-890
6	186-220	889-855
7	221-260	854-815
8	261-305	814-770
9	306-355	769-720
10	356-410	719-665
11	411-470	664-605
12	471-535	604-540
13	536-605	539-470
14	606-680	469-395
15	681-760	394-315
16	761-845	314-230
17	846-935	229-140
18	936-1030	139-45

Proof of a possible need to extend the original

well if you look to the 1969 Atlantic hurricane season there was a hurricane called Camille. Camille's winds were 190 mph, this if the pattern that I found holds true , the table above would class it as Cat. 6. Other hurricanes that could be Cat. 6 according to a value of one of the wind statements etc. are:

2005,Wilma pressure