From the first flight to the last, this is one of the most important areas of aviation knowledge.
Pre-Flight Resources:
Aviation Weather (I start with Prog Charts to get a big picture and work my way down into the details)
Training Resources:
Jeppesen Weather Clinic Confidential (a good intro or refresher)
Read about it:
Weather Flying (not just what the weather is doing / will do, but how a pilot should think about it and react)
