On the topic of weather codes, my first great Staff achievement (was there another?
) was in the mid-70s at HQ MATO as a flt lt... getting the RN, AAC, MoD PE and [importantly] USAFE to accept just the weather colour (amplified by r/w and s/w [and QFE/QNH?] instead of the full nine-yards of cloud and vis. Oh, that saved us Area ATCOs so much r/t time!