Aviation Weather

I've been finding some of the aviation weather products a bit difficult to keep a track of with their times of issuance and validity, so I'm going to try to simplify it here:

METAR: Issued - Hourly
               Valid - Time of issuance
TAF: Issued - Every six hours
         Valid - 24 - 30 hours
SD (Radar Report): Issued - Hourly
                               Valid - Time of issuance            
FA (Area Forecast): Issued - Every eight hours
                                Valid - 18 hours
WA (AIRMET): Issued - Every six hours
                Valid - Six hours
WS (SIGMET): Issued - Unscheduled
                Valid - Four hours (hurricane related six hours)
WST (Convective SIGMET): Issued - Hourly
                                  Valid - Two hours
FD (Winds Aloft): Issued - Every 12 hours
                            Valid - 24 hours
Surface Analysis: Issued - Every three hours
                           Valid - Listed
Weather Depiction: Issued - Every three hours
                              Valid - Time of issuance
Significant Weather Prognostic: Issued - Every six hours
                                                Valid - Listed

Hopefully this will be a good reference for myself and others to come back and look at!