WTPN32 PGTW 031500 1. TYPHOON 13W (JELAWAT) WARNING NR 011 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 031200Z6 --- NEAR 24.9N5 143.0E8 MOVEMENT PAST SIX HOURS - 290 DEGREES AT 12 KTS POSITION ACCURATE TO WITHIN 045 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 115 KT, GUSTS 140 KT RADIUS OF 100 KT WINDS - 020 NM RADIUS OF 050 KT WINDS - 055 NM NORTH SEMICIRCLE 035 NM ELSEWHERE RADIUS OF 035 KT WINDS - 140 NM NORTH SEMICIRCLE 070 NM ELSEWHERE REPEAT POSIT: 24.9N5 143.0E8 --- FORECASTS: 12 HRS, VALID AT: 040000Z4 --- 25.9N6 140.6E1 MAX SUSTAINED WINDS - 110 KT, GUSTS 135 KT RADIUS OF 100 KT WINDS - 020 NM RADIUS OF 050 KT WINDS - 055 NM NORTH SEMICIRCLE 030 NM ELSEWHERE RADIUS OF 035 KT WINDS - 140 NM NORTH SEMICIRCLE 070 NM ELSEWHERE VECTOR TO 24 HR POSIT: 295 DEG/ 12 KTS --- 24 HRS, VALID AT: 041200Z7 --- 26.8N6 138.2E4 MAX SUSTAINED WINDS - 105 KT, GUSTS 130 KT RADIUS OF 100 KT WINDS - 015 NM RADIUS OF 050 KT WINDS - 050 NM NORTH SEMICIRCLE 030 NM ELSEWHERE RADIUS OF 035 KT WINDS - 135 NM NORTH SEMICIRCLE 065 NM ELSEWHERE VECTOR TO 36 HR POSIT: 285 DEG/ 11 KTS --- 36 HRS, VALID AT: 050000Z5 --- 27.4N3 135.8E7 MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT RADIUS OF 100 KT WINDS - 010 NM RADIUS OF 050 KT WINDS - 040 NM NORTH SEMICIRCLE 030 NM ELSEWHERE RADIUS OF 035 KT WINDS - 115 NM NORTH SEMICIRCLE 060 NM ELSEWHERE VECTOR TO 48 HR POSIT: 285 DEG/ 10 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 051200Z8 --- 27.9N8 133.5E2 MAX SUSTAINED WINDS - 095 KT, GUSTS 115 KT RADIUS OF 050 KT WINDS - 030 NM NORTH SEMICIRCLE 020 NM ELSEWHERE RADIUS OF 035 KT WINDS - 090 NM NORTH SEMICIRCLE 055 NM ELSEWHERE VECTOR TO 72 HR POSIT: 285 DEG/ 11 KTS --- 72 HRS, VALID AT: 061200Z9 --- 28.9N9 128.8E9 MAX SUSTAINED WINDS - 080 KT, GUSTS 100 KT RADIUS OF 050 KT WINDS - 015 NM RADIUS OF 035 KT WINDS - 070 NM NORTH SEMICIRCLE 040 NM ELSEWHERE --- REMARKS: 031500Z9 POSITION NEAR 25.2N9 142.4E1. TYPHOON (TY) 13W (JELAWAT), LOCATED APPROXIMATELY 95 NM EAST OF IWO JIMA, HAS TRACKED WEST-NORTHWESTWARD AT 12 KNOTS DURING THE PAST 06 HOURS. THE WARNING POSITION IS BASED ON 031130Z8 VISIBLE AND INFRARED SATELLITE IMAGERY AS WELL AS A 031118Z4 SPECIAL SENSOR MICROWAVE IMAGE (SSMI). THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 115 KNOTS. ANIMATED SATELLITE IMAGERY REVEALS A SMALL SYSTEM WITH DEEP CONVECTION AND TIGHTLY CURVED BANDS. THE 200 MB ANALYSIS INDICATES THAT THE SYSTEM IS BENEATH A DIFFLUENT REGION GENERATED BY A HIGH TO THE NORTHWEST AND A TROPICAL UPPER TROPOSPHERIC LOW TO THE SOUTHWEST. TY 13W (JELAWAT) REMAINS UNDER THE STEERING INFLUENCE OF THE MID-LEVEL HIGH TO THE NORTHEAST. THE SYSTEM IS FORECAST TO TRACK WEST-NORTHWESTWARD THROUGH THE FORECAST PERIOD SOUTH OF THE MID-LEVEL RIDGE AXIS. TY 13W (JELAWAT) WILL SLOWLY WEAKEN THROUGHOUT THE FORECAST PERIOD. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 031200Z6 IS 24 FEET. REFER TO WWPW31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 032100Z6 (DTG 031951Z9), 040300Z7 (DTG 040151Z1), 040900Z3 (DTG 040751Z7) AND 041500Z0 (DTG 041351Z4).// NNNN