Tropical Cyclone Sigmet
Issued by NWS

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247
WCPA06 PHFO 312111
WSTPAS

KZAK SIGMET SIERRA 18 VALID 312115/010315 PHFO-
OAKLAND OCEANIC FIR TC IONA OBS AT 2100Z N1312 W17042. CB TOP FL540
WI 180NM OF CENTER. MOV WNW 19KT. NC. FCST 0300Z TC CENTER N1336
W17230.