WTPH20 RPMM 170600 TTTSTORM WARNING 11 AT 0600 17 JANUARY SEVERE TROPICAL STORM {MEKKHALA} (1501) WAS ESTIMATED BASED ON ALL AVAILABLE DATA AT ONE TWO POINT ZERO NORTH ONE TWO FIVE POINT EIGHT EAST FORECAST TO MOVE NORTHWEST AT ZERO FIVE METERS PER SECOND ROUGH TO VERY HIGH SEAS WITHIN TWO ZERO ZERO KILOMETER 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 TWO ZERO ZERO KILOMETER RADIUS FROM THE CENTER FORECAST POSITIONS AT 180600 ONE FOUR POINT NINE NORTH ONE TWO TWO POINT SEVEN EAST AT 190600 ONE EIGHT POINT NINE NORTH ONE TWO THREE POINT ZERO EAST AND AT 200600 TWO ONE POINT EIGHT NORTH ONE TWO FIVE POINT SEVEN EAST ALL SHIPS WITHIN STORM AREA ARE REQUESTED TO SEND THREE HOURLY WEATHER REPORT TO PHILIPPINE ATMOSPHERIC GEOPHYSICAL AND ASTRONOMICAL SERVICES ADMINISTRATION PD PAGASA=