WTPH20 RPMM 161800 AT 1800 16 JANAURY SEVERE TROPICAL STORM (MEKKHALA) (1501) UPGRADED FROM TROPICAL STORM WAS ESTIMATED BASED ON ALL AVAILABLE DATA AT ONE ONE POINT ONE NORTH ONE TWO SEVEN POINT SIX EAST FORECAST TO MOVE WEST AT ZERO FOUR METERS PER SECOND ROUGH TO VERY HIGH SEAS WITHIN ONE SEVEN FIVE KILOMETERS RADIUS FROM THE CENTER ESTIMATED CENTRAL PRESSURE NINE EIGHT FOUR HECTOPASCALS MAXIMUM WINDS TWO EIGHT METERS PER SECOND NEAR THE CENTER ONE THREE METERS PER SECOND WITHIN ONE SEVEN FIVE KILOMETER RADIUS FROM THE CENTER FORECAST POSITIONS AT 171800 ONE TWO POINT FOUR NORTH ONE TWO THREE POINT EIGHT EAST AT 181800 ONE FIVE POINT TWO NORTH ONE TWO ONE POINT ZERO EAST AND AT 191800 ONE NINE POINT ONE NORTH ONE ONE NINE POINT NINE EAST ALL SHIPS WITHIN STORM AREA ARE REQUESTED TO SEND THREE HOURLY WEATHER REPORT TO PHILIPPINE ATMOSPHERIC GEOPHYSICAL AND ASTRONOMICAL SERVICES ADMINISTRATION PD= PAGASA=