Climate alarmists
blame every
bad weather event
on global warming.
What about
an absence
of bad weather ?
Never mind that !
The number of
US tornadoes
has been
above average
this year,
although
well below 2008
and 2011.
Note:
Data since September
2019 are still provisional.
But there have been
no EF-5 tornadoes
hitting the U.S. this year,
the strongest category:
This extends
the period
without
an EF-5
to six years,
the last EF-5
being the
Moore,
Oklahoma
tornado in
May 2013.
There has only been
one longer period
without an EF-5 --
the seven years
from 2000 to 2006.
Powerful
tornadoes
were much
more common
in the 1970s.
The small
numbers of EF-5s
make estimation
of long term
trends difficult,
but such trends
are clearer
with the EF-4s.
Provisionally
there have been
three EF4s this year,
a figure that is
unlikely to change
This is
a continuation
of low EF4 numbers
in recent years,
in contrast to
the 1970s:
Meteorologists say
that tornadoes, and
the thunderstorms
from which they form,
depend on the clash
of warm and cold air.
Typically,
the warm moist air
comes from the Gulf,
while the cold air
is from Canada.
According to
greenhouse
gas theory,
the poles
should warm
much faster
than the tropics.
That means
the type of
thunderstorms
that lead to
tornadoes,
would tend
to be less
powerful.
So tornadoes
should be
less frequent
and weaker.
Which is what
happened.
So this is one
of the few areas
where declining
trends of EF4 and
EF5 tornadoes,
correspond with
a greenhouse gas
warming world !