WSPA12 PHFO 030955 KZAK SIGMET YANKEE 8 VALID 030955/031355 PHFO- OAKLAND OCEANIC FIR EMBD TS OBS AT 0950Z WI N1545 E13000 - N1615 E14045 - N1230 E13900 - N1115 E13000 - N1545 E13000. TOP FL550. STNR. WKN. PLEASE ENSURE ALL FUTURE SIGMETS CONFORM TO THE FORMAT SPECIFIED IN ICAO ANNEX 3 CHAPTER 7 AND APPENDIX 6. REGARDS SADIS GATEWAY OPERATOR