On 6 Apr, 19:23, Alastair wrote:
On Apr 5, 5:55*pm, John Hall wrote:
,
*Bonos Ego writes:

http://i393.photobucket.com/albums/p...dDeviation.jpg

Thanks. Very interesting, though I'm not sure that I could draw any
conclusions from it.

It's easy to see you will never make a climato.

But what is noticeable is that this cold winter with a standard
deviation of 2.4 is unique in the last 10 years, much as the warm
summer in 1976 was unique in the 1970s. Once in ten year events do
happen!

Any idea how often?

(Not that I have any interest in statistics.)