For years hillwalkers and climbers have struggled to understand the complexities of the weather systems. This book, written by a professional weather forecaster, provides both the beginner and the more experienced with an understanding of the basic principles of the cause of each of the elements of wind, rain, snow, cloud, fog, sun and thunder, and looks at how they are affected by mountains and high ground. The author also explains the basic terminology of depressions, warm and cold fronts and airmasses, how to interpret weather maps and how to make short-term weather forecasts from observation. Aimed at hillwalkers and climbers, it is also invaluable for anyone wanting to understand and interpret weather systems.