WTPN33 PGTW 180900    
1. TROPICAL STORM 15W (EWINIAR) WARNING NR 037    
   03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
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   WARNING POSITION:
   180600Z5 --- NEAR 39.2N4 149.6E0
     MOVEMENT PAST SIX HOURS - 360 DEGREES AT 02 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   REPEAT POSIT: 39.2N4 149.6E0
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   FORECASTS:
   12 HRS, VALID AT:
   181800Z8 --- 39.6N8 149.7E1
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   VECTOR TO 24 HR POSIT: 050 DEG/ 02 KTS
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   24 HRS, VALID AT:
   190600Z6 --- 39.8N0 150.0E6
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 36 HR POSIT: 085 DEG/ 05 KTS
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   36 HRS, VALID AT:
   191800Z9 --- 39.9N1 151.2E9
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 48 HR POSIT: 085 DEG/ 06 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   200600Z8 --- 40.0N4 152.7E5
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
180900Z8 POSITION NEAR 39.3N5 149.6E0.
TROPICAL STORM (TS) 15W (EWINIAR), LOCATED SOUTHEAST OF HOKKAIDO, 
JAPAN, HAS DRIFTED NORTHWARD AT 02 KNOTS OVER THE PAST 6 HOURS. THE 
WARNING POSITION IS BASED ON 180530Z7 VISIBLE AND INFRARED SATELLITE 
IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT 
INTENSITY ESTIMATES OF 25 AND 45 KNOTS AND A RECENT QUIKSCAT PASS.
ANIMATED MULTI-SPECTRAL SATELLITE IMAGERY DEPICTS A TIGHTLY WRAPPED,
VERY BROAD LOW LEVEL CIRCULATION CENTER (LLCC), WITH VERY WEAK
CONVECTION ASSOCIATED WITH IT. THE SYSTEM IS CURRENTLY UNDER WEAK
STEERING FLOW, BUT IS FORECAST TO RESUME AN EASTWARD TRACK AS IT 
COMES UNDER THE STEERING INFLUENCE OF THE SUB-TROPICAL RIDGE TO THE
SOUTHEAST. TS 15W IS FORECAST TO TRACK NORTHWARD THROUGH THE NEXT 12
HOURS, THEN TURN INCREASINGLY EASTWARD THROUGH THE REMAINDER OF THE
FORECAST PERIOD. THE SYSTEM IS FORECAST TO DISSIPATE OVER LOWER SEA
SURFACE TEMPERATURES AND UNDER MODERATE VERTICAL WIND SHEAR WITHIN 
48 HOURS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 180600Z5 IS 18 FEET. 
REFER TO WWPW30 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT 
WARNINGS AT 181500Z5 (DTG 181353Z1), 182100Z2 (DTG 181953Z7), 
190300Z3 (DTG 190153Z9) AND 190900Z9 (DTG 190753Z5). REFER TO 
TROPICAL DEPRESSION 17W WARNINGS (WTPN31 PGTW) FOR SIX-HOURLY 
UPDATES. REFER TO TROPICAL DEPRESSION 18W WARNINGS (WTPN32 PGTW) FOR 
SIX-HOURLY UPDATES.//


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