Just what does it mean?

In similar grammatical vein, the Sunday Times newspaper has for years published a weekly weather forecast summary on the back page written by “. . .a Sky News forecaster”.

I’ve often wondered where Sky News gets some of its stories. . .

In short. it is a statement that using a wide term analysis of prediction does not necessarily provide the best forecast and often confuses the perception of what the forecast means. further more that in any effort of providing explanation can cause more confusion.

short and sweet. K.I.S.s