WWHK82 VHHH 240600 40:1:31:11:01:00 HONG KONG METEOROLOGICAL SERVICE PROVIDES THE FOLLOWING WARNING/INFORMATION FOR THE SOUTH CHINA SEA. WARNINGS TYPHOON(T) MEKKHALA(2607):RADII OF HURRICANES,STORMS,GALES:30,60,120NM. SYNOPSIS (240600UTC) AND 24-HOUR FORECAST AT 240600UTC, T MEKKHALA (2607) WITH CENTRAL P 965 HPA AND MAX WINDS 75 KT WAS CENTERED WITHIN 30 NM OF 21.6N 124.7E AND IS FORECAST TO MOVE NNE AT ABOUT 8 KT FOR THE NEXT 24 HOURS. FCST POS AT 250600UTC: 24.7N, 125.7E SIGNIFICANT SWELL/HIGH SEAS SEAS 6,10,14M OVER GALES,STORMS,HURRICANES. SWELL E TO NE 5-7M OVER LUZON STRAIT,SEAS EAST OF PHILIPPINES. SWELL E TO SE 5-7M OVER SEAS EAST OF TAIWAN AND THE EAST CHINA SEA(ECS). THUNDERSTORMS/SEVERE WEATHER FRQ HEAVY SQUALLY(SQ) SHOWERS(SH) AND THUNDERSTORMS(TS) WITHIN 300NM FROM CENTRE OF MEKKHALA(2607). SCT SQ SH AND TS OVER THE ECS, SOUTHERN PART OF SOUTH CHINA SEA,SEAS NEAR THE PHILIPPINES, SEAS NEAR MALAYSIA AND GULF OF THAILAND. SEA FOG/REDUCED VISIBILITY VIS DOWN TO 500 M IN SQ SH AND TS.