about the wimpy hurricane season.
Oh well, we can always look forward to next year.
The classic denialist's Straw Man. Here Shelby is setting up the straw man that if Global Warming were true, we would have more hurricanes each year. Since this year's season was not particularly notable, the implication is that Global Warming is a bogus theory.
The dishonesty in the approach is that Shelby knows that the correlation is far more complex than that, and the yearly variations of the chaotic system is enough to mask the longterm effects if viewed over the short interval of a year or two.
Shelby knows this, but he is preying on the fact that others are not paying close enough attention to the nuances. That way those people won't notice that while climatologists master their science, Shelby is mastering the cheap innuendo.
Shelby's strawman also invokes the classic "appeal to ignorance" argument which is another hallmark of the science denialist. That works by pointing out an area where the application of a theory has not yet been completely worked out. By doing this, the denialist conflates the theory with the incomplete application, confusing his prey into doubting the theory.
In this case the "appeal to ignorance" is basically, "If climatologists are unclear about the correlation between hurricane activity and global warming, then they must be unclear about global warming." This is equivalent to "If medical science cannot cure all forms of cancer right now, all medical science must be bogus."
Fortunately, real scientists don't use "appeal to ignorance" as a form of rhetoric.