WTPH20 RPMM 311200 TTT GALE WARNING 11 AT 1200 31 JULY SEVERE TROPICAL STORM {NIDA} (1604) WAS ESTIMATED BASED ON ALL AVAILABLE DATA AT ONE EIGHT POINT SEVEN NORTH ONE TWO ONE POINT TWO EAST FORECAST TO MOVE NORTHWEST AT ZERO FIVE METERS PER SECOND ROUGH TO VERY HIGH SEAS WITHIN TWO FIVE ZERO KILOMETER RADIUS FROM THE CENTER ESTIMATED CENTRAL PRESSURE NINE EIGHT FOUR HECTOPASCAL MAXIMUM WINDS TWO EIGHT METERS PER SECOND NEAR THE CENTER ONE THREE METERS PER SECOND WITHIN TWO FIVE ZERO KILOMETER RADIUS FROM THE CENTER FORECAST POSITIONS AT 011200 TWO ONE POINT ZERO NORTH ONE ONE SIX POINT EIGHT EAST AND AT 021200 TWO THREE POINT SIX NORTH ONE ONE ONE POINT EIGHT EAST ALL SHIPS WITHIN STORM AREA ARE REQUESTED TO SEND THREE HOURLY WEATHER REPORT TO PHLIPPINE ATMOSPHERIC GEOPHYSICAL AND ASTRONOMICAL SERVICES ADMINISTRATION PD PAGASA=