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International Sigmet / Convective Sigmet
Issued by NWS

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WSPA06 PHFO 100538
SIGPAS

KZAK SIGMET SIERRA 4 VALID 100540/100940 PHFO-
OAKLAND OCEANIC FIR EMBD TS OBS AT 0535Z WI N0330 E15330 - N0345
E15745 - N0000 E15800 - N0015 E15315 - N0330 E15330. TOP FL550. MOV
WSW 25KT. NC.