000 WSPA06 PHFO 210357 SIGPAS KZAK SIGMET SIERRA 1 VALID 210400/210800 PHFO- OAKLAND OCEANIC FIR EMBD TS OBS AT 0355Z WI N0715 W16345 - N0645 W15900 - N0245 W17000 - N0445 W16945 - N0715 W16345. TOP FL530. STNR. NC.