For over 50 years David has collected weather lore, studied ancient records and compiled accounts of weather observations. This has enabled him to create his own, detailed, methodology which is recognised as 90% accurate. He has become the foremost authority on nature-based forecasting. Here he shares his knowledge so that you too can become an expert on producing detailed weather forecasts, using the data you can collect yourself. The process and what to look for are fully explained. You can learn how to foretell one growing season ninety days ahead. You can establish what the main features of the weather will be and then have the satisfaction of seeing it happen.