Providing a comprehensive review of our understanding of the small, high latitude weather systems known as polar lows, Erik Rasmussen and John Turner describe the climatological distribution of these depressions. They cover observational investigations into their structure, the operational forecasting of polar lows and the theoretical research into why they develop. They also discuss the experiments that reveal that some polar lows can be predicted. This book is of value to researchers and professional weather forecasters concerned with polar regions.