UNCLAS //N03144// MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ WTPN31 PGTW 091500 1. TYPHOON 31W (PONGSONA) WARNING NR 028 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 091200Z2 --- NEAR 18.2N1 143.7E5 MOVEMENT PAST SIX HOURS - 360 DEGREES AT 12 KTS POSITION ACCURATE TO WITHIN 040 NM POSITION BASED ON EYE FIXED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 115 KT, GUSTS 140 KT BECOMING EXTRATROPICAL RADIUS OF 100 KT WINDS - 040 NM RADIUS OF 050 KT WINDS - 070 NM NORTHEAST QUADRANT 070 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 170 NM NORTHEAST QUADRANT OVER WATER 170 NM SOUTHEAST QUADRANT OVER WATER 130 NM SOUTHWEST QUADRANT 150 NM NORTHWEST QUADRANT REPEAT POSIT: 18.2N1 143.7E5 --- FORECASTS: 12 HRS, VALID AT: 100000Z1 --- 21.0N3 145.6E6 MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT BECOMING EXTRATROPICAL RADIUS OF 050 KT WINDS - 065 NM NORTHEAST QUADRANT 065 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 065 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 160 NM NORTHEAST QUADRANT 160 NM SOUTHEAST QUADRANT 140 NM SOUTHWEST QUADRANT OVER WATER 160 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 050 DEG/ 25 KTS --- 24 HRS, VALID AT: 101200Z4 --- 24.3N9 149.8E2 MAX SUSTAINED WINDS - 085 KT, GUSTS 105 KT BECOMING EXTRATROPICAL RADIUS OF 050 KT WINDS - 060 NM RADIUS OF 034 KT WINDS - 150 NM NORTHEAST QUADRANT 150 NM SOUTHEAST QUADRANT 135 NM SOUTHWEST QUADRANT 150 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 055 DEG/ 34 KTS --- 36 HRS, VALID AT: 110000Z2 --- 27.9N8 156.3E5 MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT EXTRATROPICAL VECTOR TO 48 HR POSIT: 060 DEG/ 37 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 111200Z5 --- 31.2N6 164.0E1 MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT EXTRATROPICAL VECTOR TO 72 HR POSIT: 075 DEG/ 34 KTS --- 72 HRS, VALID AT: 121200Z6 --- 34.0N7 179.7E4 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT EXTRATROPICAL --- REMARKS: 091500Z5 POSITION NEAR 18.9N8 144.2E1. TYPHOON (TY) 31W (PONGSONA), LOCATED APPROXIMATELY 205 NM NORTH- NORTHWEST OF SAIPAN, HAS TRACKED NORTHWARD AT 12 KNOTS OVER THE PAST SIX HOURS. THE WARNING POSITION IS BASED ON 091130Z4 ENHANCED INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 115 KNOTS. ANIMATED WATER VAPOR IMAGERY INDICATES THAT TY 31W IS BEGINNING TO INTERACT WITH THE MID-LATITUDE SYSTEM PROPAGATING EASTWARD FROM JAPAN. A 091146Z1 SSM/I PASS DEPICTS WEAKENED CONVECTION IN THE SOUTHERN SEMI-CIRCLE. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 091200Z2 IS 36 FEET. REFER TO WWPW31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 092100Z2, 100300Z4, 100900Z0 AND 101500Z7.// NNNN