WTPH20 RPMM 171200 TTT STORM WARNING 07 AT 1200 17 OCTOBER SEVERE TROPICAL STORM (LAN) (1721) WAS ESTIMATED BASED ON ALL AVAILABLE DATA AT ONE ZERO POINT FIVE NORTH ONE THREE ONE POINT NINE EAST FORECAST TO MOVE NORTH NORTHEAST AT ZERO FOUR METERS PER SECOND ROUGH TO VERY HIGH SEAS WITHIN FOUR ZERO ZERO KILOMETER RADIUS EAST SEMICIRCLE THREE ZERO ZERO KILOMETER RADIUS ELSEWHERE ESTIMATED CENTRAL PRESSURE NINE EIGHT ONE HECTOPASCALS MAXIMUM WINDS TWO NINE METERS PER SECOND NEAR THE CENTER ONE THREE METERS PER SECOND WITHIN FOUR ZERO ZERO KILOMETER RADIUS FORECAST POSITIONS AT 181200 ONE THREE POINT EIGHT NORTH ONE THREE TWO POINT THREE EAST AT 191200 ONE SEVEN POINT ONE NORTH ONE THREE ONE POINT TWO EAST AT 201200 TWO ZERO POINT ZERO NORTH ONE THREE ONE POINT ZERO EAST AT 211200 TWO THREE POINT SIX NORTH ONE THREE ONE POINT EIGHT EAST AND AT 221200 TWOSEVEN POINT TWO NORTH ONE THREE TWO POINT FOUR EAST ALL SHIPS WITHIN STORM AREA ARE REQUESTED TO SEND THREE HOURLY WEATHER REPORT TO PHILIPPINE ATMOSPHERIC GEOPHYSICAL AND ASTRONOMICAL SERVICES ADMISTRATION PD PAGASA=