WTPN32 PGTW 180300    
1. TYPHOON 25W (SONAMU) WARNING NR 016    
   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   180000Z9 --- NEAR 41.5N0 146.3E4
     MOVEMENT PAST SIX HOURS - 030 DEGREES AT 31 KTS
     POSITION ACCURATE TO WITHIN 040 NM
     POSITION BASED ON EYE FIXED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT
   EXTRATROPICAL
   REPEAT POSIT: 41.5N0 146.3E4
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   FORECASTS:
   12 HRS, VALID AT:
   181200Z2 --- 46.4N4 151.3E0
   MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
   EXTRATROPICAL
   VECTOR TO 24 HR POSIT: 050 DEG/ 37 KTS
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   24 HRS, VALID AT:
   190000Z0 --- 50.8N3 160.3E0
   MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
   EXTRATROPICAL
   VECTOR TO 36 HR POSIT: 070 DEG/ 41 KTS
    ---
   36 HRS, VALID AT:
   191200Z3 --- 53.2N0 172.9E9
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   EXTRATROPICAL
    ---
REMARKS:
180300Z2 POSITION NEAR 42.7N3 147.6E8.
TYPHOON (TY) 25W (SONAMU), LOCATED APPROXIMATELY 240 NM NORTHEAST OF
MISAWA, JAPAN, HAS TRACKED NORTH-NORTHEASTWARD AT 31 KNOTS DURING 
THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 172330Z6 VISIBLE 
SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE 
CURRENT INTENSITY ESTIMATES OF 65 AND 77 KNOTS. VISIBLE SATELLITE 
IMAGERY DEPICTS A MID/HIGH CLOUD SHIELD EXTENDING SEVERAL HUNDRED 
MILES NORTHWEST OF THE VORTEX CENTER INDICATIVE OF AN EXTRATROPICAL 
SYSTEM. THE 171800Z7 UPPER-LEVEL WIND ANALYSIS INDICATES THAT TY 25W 
IS SITUATED BENEATH THE POLAR FRONT JET (SUSTAINED WINDS OF 60 KNOTS 
FROM THE SOUTHWEST). WATER VAPOR IMAGERY DEPICTS A COLD AIR TONGUE 
PUSHING IN TOWARD THE VORTEX FROM THE SOUTHWEST. TRACKING BENEATH 
THE UPPER LEVEL RIDGE AXIS HAS HELPED SUSTAIN INTENSITY SOMEWHAT 
EVEN THOUGH COOLER SEA SURFACE TEMPERATURES HAVE VIRTUALLY 
ELIMINATED THE CONVECTION. TY 25W SHOULD WEAKEN THROUGH THE PERIOD 
AS THE SYSTEM TRACKS TO THE NORTHEAST AS AN EXTRATROPICAL SYSTEM.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 180000Z9 IS 22 FEET. REFER TO
WWPW30 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. THIS IS THE FINAL 
WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WARNING CENTER 
(NAVPACMETOCCEN).  THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF 
REGENERATION. REFER TO TROPICAL STORM 26W (NONAME) WARNINGS (WTPN31 
PGTW) FOR SIX-HOURLY UPDATES.//



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