WTPH20 RPMM 170600 TTT STORM WARNING 6 AT 0600 17 OCTOBER SEVERE TROPICAL STORM {LAN} (1721) WAS ESTIMATED BASED ON ALL AVAILABLE DATA AT ONE ZERO POINT SEVEN NORTH ONE THREE ONE POINT EIGHT EAST FORECAST TO MOVE NORTH NORTHEAST AT ZERO THREE METERS PER SECOND ROUGH TO HIGH SEAS WITHIN FOUR ZERO ZERO KILOMETER RADIUS EAST SEMICIRCLE THREE ZERO ZERO KILOMETER RADIUS ELSEWHERE ESTIMATED CENTRAL PRESSURE NINE EIGHT SEVEN HECTOPASCALS MAXIMUM WINDS TWO SIX METERS PER SECOND NEAR THE CENTER ONE THREE METERS PER SECOND WITHIN FOUR ZERO ZERO KILOMETER RADIUS EAST SEMICIRCLE THREE ZERO ZERO KILOMETER RADIUS ELSEWHERE FORECAST POSITIONS AT 180600 ONE THREE POINT TWO NORTH ONE THREE TWO POINT TWO EAST AT 190600 ONE SIX POINT FIVE NORTH ONE THREE ONE POINT FIVE EAST AT 200600 ONE NINE POINT FIVE NORTH ONE THREE ONE POINT FOUR EAST AT 210600 TWO THREE POINT TWO NORTH ONE THREE TWO POINT FIVE EAST AND AT 220600 TWO EIGHT POINT FIVE NORTH ONE THREE FIVE POINT ZERO EAST ALL SHIPS WITHIN STORM AREA ARE REQUESTED TO SEND THREE HOURLY WEATHER REPORT TO PHILIPPINE ATMOSPHERIC GEOPHYSICAL AND ASTRONOMICAL SERVICES ADMINISTRATION PD PAGASA =