Apparently the best forecast is to know how to interpret animals behaviour like: cows, sheep, frogs. They can sense local weather better than any satelites or scientists. The trouble is, I don't possess that knowledge.
What you need is a modern-day Bill Foggitt... [good name for a forecaster]:
"... One of the most respected amateur weather forecasters in Britain died after years of using moles, flies and seaweed to beat the Meteorological Office at its own game.
Bill Foggitt, who was 91 and the senior member of a Yorkshire pub discussion group nicknamed the Magic Circle, combined natural lore with an exceptional file of family records dating back to 1771 to make his forecasts.
A cloudburst which swept away part of the town of Yarm that year prompted his great-great-great-grandfather to start a diary which generations continued - partly, according to Mr Foggitt, "in the hope that we would eventually be able to predict catastrophes".
That duly happened with Mr Foggitt himself, to such an extent that, in the 1980s his report, Foggitt's Forecast, was appended to Yorkshire Television weather bulletins and treated with great respect. [I remember those...]
Drawing on the family archive and his own astute observation, Mr Foggitt took forecasting far beyond the boundaries of cold fronts and isobars.
The closing of pines cones almost always preceded wet weather, he deduced, and flies were likely to behave sluggishly before thunderstorms."