UNCLAS //N03144//
MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
WTPN31 PGTW 190900    
1. TROPICAL STORM 01W (YANYAN) WARNING NR 015    
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   190600Z6 --- NEAR 14.7N2 148.8E1
     MOVEMENT PAST SIX HOURS - 065 DEGREES AT 07 KTS
     POSITION ACCURATE TO WITHIN 045 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   RADIUS OF 034 KT WINDS - 085 NM NORTHEAST QUADRANT    
                            075 NM SOUTHEAST QUADRANT    
                            075 NM SOUTHWEST QUADRANT    
                            085 NM NORTHWEST QUADRANT    
   REPEAT POSIT: 14.7N2 148.8E1
    ---
   FORECASTS:
   12 HRS, VALID AT:
   191800Z9 --- 15.2N8 149.9E3
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   BECOMING EXTRATROPICAL
   RADIUS OF 034 KT WINDS - 085 NM NORTHEAST QUADRANT    
                            075 NM SOUTHEAST QUADRANT    
                            075 NM SOUTHWEST QUADRANT    
                            085 NM NORTHWEST QUADRANT    
   VECTOR TO 24 HR POSIT: 070 DEG/ 06 KTS
    ---
   24 HRS, VALID AT:
   200600Z8 --- 15.6N2 151.1E8
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   BECOMING EXTRATROPICAL
   RADIUS OF 034 KT WINDS - 085 NM NORTHEAST QUADRANT    
                            075 NM SOUTHEAST QUADRANT    
                            075 NM SOUTHWEST QUADRANT    
                            085 NM NORTHWEST QUADRANT    
   VECTOR TO 36 HR POSIT: 075 DEG/ 07 KTS
    ---
   36 HRS, VALID AT:
   201800Z1 --- 16.0N7 152.5E3
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   BECOMING EXTRATROPICAL
   VECTOR TO 48 HR POSIT: 075 DEG/ 07 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   210600Z9 --- 16.3N0 153.9E8
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   EXTRATROPICAL
   VECTOR TO 72 HR POSIT: 080 DEG/ 05 KTS
    ---
   72 HRS, VALID AT:
   220600Z0 --- 16.6N3 155.8E9
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   EXTRATROPICAL
    ---
REMARKS:
190900Z9 POSITION NEAR 14.8N3 149.1E5.
TROPICAL STORM 01W (YANYAN), LOCATED APPROXIMATELY 175 NM EAST OF 
SAIPAN, HAS TRACKED EAST-NORTHEASTWARD AT 07 KNOTS OVER THE PAST 06 
HOURS. THE WARNING POSITION IS BASED ON 190530Z8 VISIBLE AND 
INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON 
SATELLITE CURRENT INTENSITY ESTIMATES OF 35 AND 45 KNOTS. ANIMATED 
WATER VAPOR IMAGERY INDICATES THAT THE SYSTEM HAS BEGUN TO WEAKEN 
OVER THE LAST 6 HOURS UNDER INCREASING WESTERLY WINDSHEAR. MAXIMUM 
SIGNIFICANT WAVE HEIGHT AT 190600Z6 IS 16 FEET. REFER TO WWPN31 RJTX 
FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 191500Z6, 
192100Z3, 200300Z5 AND 200900Z1.//