WTPN31 PGTW 232100 NORTH-NORTHEAST OF MANILA, PHILIPPINES, HAS TRACKED NORTHWESTWARD AT 08 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 231800Z IS 988 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 231800Z IS 22 FEET. NEXT WARNINGS AT 240300Z, 240900Z, 241500Z AND 242100Z.// ???? // END PART 04/04 //