WTPN31 PGTW 181500    
1. TROPICAL STORM 21W (VIPA) WARNING NR 007    
   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   181200Z2 --- NEAR 27.5N4 138.6E8
     MOVEMENT PAST SIX HOURS - 350 DEGREES AT 11 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   RADIUS OF 035 KT WINDS - 090 NM NORTHEAST QUADRANT    
                            090 NM SOUTHEAST QUADRANT    
                            050 NM SOUTHWEST QUADRANT    
                            050 NM NORTHWEST QUADRANT    
   REPEAT POSIT: 27.5N4 138.6E8
    ---
   FORECASTS:
   12 HRS, VALID AT:
   190000Z0 --- 29.7N8 138.3E5
   MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
   RADIUS OF 050 KT WINDS - 020 NM 
   RADIUS OF 035 KT WINDS - 090 NM NORTHEAST QUADRANT    
                            090 NM SOUTHEAST QUADRANT    
                            050 NM SOUTHWEST QUADRANT    
                            050 NM NORTHWEST QUADRANT    
   VECTOR TO 24 HR POSIT: 015 DEG/ 13 KTS
    ---
   24 HRS, VALID AT:
   191200Z3 --- 32.2N7 139.1E4
   MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT
   RADIUS OF 050 KT WINDS - 025 NM 
   RADIUS OF 035 KT WINDS - 095 NM NORTHEAST QUADRANT    
                            095 NM SOUTHEAST QUADRANT    
                            060 NM SOUTHWEST QUADRANT    
                            060 NM NORTHWEST QUADRANT    
   VECTOR TO 36 HR POSIT: 035 DEG/ 14 KTS
    ---
   36 HRS, VALID AT:
   200000Z2 --- 34.6N3 141.0E6
   MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
   RADIUS OF 050 KT WINDS - 020 NM 
   RADIUS OF 035 KT WINDS - 090 NM NORTHEAST QUADRANT    
                            090 NM SOUTHEAST QUADRANT    
                            055 NM SOUTHWEST QUADRANT    
                            055 NM NORTHWEST QUADRANT    
   VECTOR TO 48 HR POSIT: 045 DEG/ 19 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   201200Z5 --- 37.2N2 144.4E3
   MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
   BECOMING EXTRATROPICAL
   RADIUS OF 050 KT WINDS - 020 NM 
   RADIUS OF 035 KT WINDS - 085 NM NORTHEAST QUADRANT    
                            085 NM SOUTHEAST QUADRANT    
                            050 NM SOUTHWEST QUADRANT    
                            050 NM NORTHWEST QUADRANT    
   VECTOR TO 72 HR POSIT: 050 DEG/ 24 KTS
    ---
   72 HRS, VALID AT:
   211200Z6 --- 42.7N3 154.6E6
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   EXTRATROPICAL
   RADIUS OF 035 KT WINDS - 080 NM NORTHEAST QUADRANT    
                            080 NM SOUTHEAST QUADRANT    
                            080 NM SOUTHWEST QUADRANT    
                            050 NM NORTHWEST QUADRANT    
    ---
REMARKS:
181500Z5 POSITION NEAR 28.1N1 138.5E7.
TROPICAL STORM (TS) 21W (VIPA), LOCATED APPROXIMATELY 495 NM SOUTH 
OF TOKYO, HAS TRACKED NORTHWARD AT 11 KNOTS DURING THE PAST SIX 
HOURS. THE WARNING POSITION IS BASED ON 181130Z4 INFRARED SATELLITE 
IMAGERY. THE WARNING INTENSITY IS BASED ON CURRENT INTENSITY 
ESTIMATES OF 45 KNOTS AND A 181118Z0 SPECIAL SENSOR MICROWAVE IMAGER 
PASS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 181200Z2 IS 15 FEET. REFER 
TO WWPW31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS 
AT 182100Z2, 190300Z3, 190900Z9 AND 191500Z6. REFER TO TROPICAL 
STORM 20W (NARI) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.//