The FAA has published a new training handbook, the Aviation Weather Handbook (FAA-H-8083-28). You can download the free PDF from the FAA website, here.
The preface explains that:
This handbook consolidates the weather information from the following advisory circulars (AC) into one source document. By doing this, the Federal Aviation Administration (FAA) intends to streamline access to the FAA’s weather documentation for users of the National Airspace System (NAS). The following ACs will remain in effect, but they will eventually be cancelled at a later date following the publication of this handbook:
- AC 00-6, Aviation Weather.
- AC 00-24, Thunderstorms.
- AC 00-30, Clear Air Turbulence Avoidance.
- AC 00-45, Aviation Weather Services.
- AC 00-54, Pilot Windshear Guide.
- AC 00-57, Hazardous Mountain Winds.
BruceAir, LLC 
While it is generally a good idea to consolidate various publications into one publication, I’m not sure this is a good idea in this case. Our understanding of weather phenomena does change very often (a cold front is a cold front). However, technology in capturing and disseminating weather information changes more frequently than our understanding of weather phenomena. It might imply that the FAA plans to update the Handbook more regularly. That was why Aviation Weather (AC 00-6) was a separate publication from Aviation Weather Services (AC 00-45). The latter was not updated as frequently compared to the former.
Correction The FORMER was not updated as frequently compared to the LATTER.
A fair point, but I commend the FAA for putting the key information in one volume. In my experience, few pilots knew about or read the various ACs. Having this important information in one source that’s a training handbook may lead more students and instructors to review the topic more thoroughly.