FAA: General Aviation Pilot's Guide to Preflight Weather Planning, Weather Self-Briefings, and Weather Decision Making

This guide is intended to help general aviation (GA) pilots, especially those with
relatively little weather-flying experience, develop skills in obtaining appropriate
weather information, interpreting the data in the context of a specific flight, and
applying the information and analysis to make safe weather flying decisions.
It has been developed with assistance and contributions from a number of
weather experts, aviation researchers, air traffic controllers, and general aviation
instructors and pilots.