The minimum ICAO standards for forecasts are in the AIP under GEN 3-5-14 (10 Jul 03). If you want to be bothered gathering the info and comparing it be my guest. It seems that we read the forecasts at work and then .... go. Yeah I know, that's what they pay me for but some days you wonder what planet the forecasters are on. On occasions I've seen just about every variation in a forecast and have been wondering what the code for a plague of locusts was as that was all that seemed to be missing.
Still if the weather out of the window is looking good, go grab an aircraft and enjoy your flying.