WTPH20 RPMM 181200 TTT WARNING 16 AT 1200 18 JANUARY TROPICAL DEPRESSION {MEKKHALA} (1501) DOWNGRADED FROM TROPICAL STORM WAS ESTIMATED BASED ON ALL AVAILABLE DATA AT ONE FIVE POINT TWO NORTH ONE TWO TWO POINT TWO EAST FORECAST TO MOVE NORTH NORTHWEST AT ZERO THREE METERS PER SECOND MODERATE TO ROUGH SEAS WITHIN ONE FIVE ZERO KILOMETER RADIUS FROM THE CENTER ESTIMATED CENTRAL PRESSURE ONE ZERO ZERO ZERO HECTOPASCALS MAXIMUM WINDS ONE FIVE METERS PER SECOND NEAR THE CENTER ONE THREE METERS PER SECOND WITHIN ONE FIVE ZERO KILOMETER RADIUS FROM THE CENTER FORECAST POSITIONS AT 191200 ONE SEVEN POINT EIGHT NORTH ONE TWO TWO POINT THREE EAST AND AT 201200 TWO ZERO POINT ZERO NORTH ONE TWO FOUR POINT ZERO EAST ALL SHIPS WITHIN DEPRESSION AREA ARE REQUESTED TO SEND THREE HOURLY WEATHER REPORT TO PHILIPPINE ATMOSPHERIC GEOPHYSICAL AND ASTRONOMICAL SERVICES ADMINISTRATION PD PAGASA=