The low number of hurricanes is caused by so-called "global warming". So-called "global warming" causes wind shear that cuts the tops off the hurricanes that prevents them from occurring. This is true except in time when there are a higher number of hurricanes. If there are a higher of hurricanes then this is clearly because of so-called "global warming" because warming causes more storms. And if the number of storms is average for the year this is also caused by so-called "global warming" because so-called "global warming" causes everything. And all of this is caused by a 0.02% increase in co2 over the last 100 years

If it is global warming, it is most likely because most weather phenomena including tornadoes require cooler temperatures to clash with warmer temperatures, and the atmospheric pressure differences from each, same as Tornadoes forming, only on a much larger scale. It's my guess that the upper atmosphere is becoming as warm as the lower atmosphere, thus reducing the availability of the power necessary for Hurricanes to develop. Well, it's either that, or because they can't qualify for Obamacare. Take your pick.

In old school it's called the calm before the storm?

I vote for happy's answer

I don't know, but I do know it is not because of global warming because we haven't got any.

because of global worming ,

idk too

We are averaging zero per year in the 2010s.

http://www.aoml.noaa.gov/hrd/hurdat/All_U.S._Hurricanes.html