115 WSPA03 PHFO 181847 SIGPAP KZAK SIGMET PAPA 4 VALID 181850/182250 PHFO- OAKLAND OCEANIC FIR EMBD TS WI N1730 W17930 - N1630 W17030 - N1250 W17100 - N1240 W17950 - N1730 W17930. CB TOPS TO FL530. MOV W 10KT. NC. BASED ON SAT AND LTG OBS.