WTPN31 PGTW 180300    
1. TROPICAL STORM 20W (VONGFONG) WARNING NR 011    
   UPGRADED FROM TROPICAL DEPRESSION 20W
   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   180000Z9 --- NEAR 16.5N2 113.4E9
     MOVEMENT PAST SIX HOURS - 340 DEGREES AT 06 KTS
     POSITION ACCURATE TO WITHIN 045 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   REPEAT POSIT: 16.5N2 113.4E9
    ---
   FORECASTS:
   12 HRS, VALID AT:
   181200Z2 --- 17.3N1 113.3E8
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   VECTOR TO 24 HR POSIT: 345 DEG/ 04 KTS
    ---
   24 HRS, VALID AT:
   190000Z0 --- 18.1N0 113.1E6
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   VECTOR TO 36 HR POSIT: 345 DEG/ 07 KTS
    ---
   36 HRS, VALID AT:
   191200Z3 --- 19.5N5 112.7E1
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT    
                            040 NM SOUTHEAST QUADRANT    
                            040 NM SOUTHWEST QUADRANT    
                            050 NM NORTHWEST QUADRANT    
   VECTOR TO 48 HR POSIT: 340 DEG/ 07 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   200000Z2 --- 20.8N0 112.2E6
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT    
                            045 NM SOUTHEAST QUADRANT    
                            045 NM SOUTHWEST QUADRANT    
                            055 NM NORTHWEST QUADRANT    
   VECTOR TO 72 HR POSIT: 325 DEG/ 07 KTS
    ---
   72 HRS, VALID AT:
   210000Z3 --- 23.2N7 110.5E7
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    ---
REMARKS:
180300Z2 POSITION NEAR 16.7N4 113.4E9.
TROPICAL STORM 20W (VONGFONG), LOCATED APPROXIMATELY 350 NM 
SOUTH OF HONG KONG, CHINA, HAS TRACKED NORTH-NORTHWESTWARD AT 06 
KNOTS OVER THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 
172330Z5 MULTISPECTRAL SATELLITE IMAGERY AND A 172259Z6 SSM/I PASS. 
THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY 
ESTIMATES OF 25 AND 35 KNOTS AND SYNOPTIC OBSERVATIONS. ANIMATED 
VISIBLE SATELLITE IMAGERY INDICATES THAT THE LOW LEVEL CIRCULATION 
CENTER IS NOW PARTIALLY EXPOSED AS THE SYSTEM CONTINUES TO 
CONSOLIDATE THE DEEP CONVECTION ASSOCIATED WITH THE SOUTHWEST 
MONSOON SURGE. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 180000Z9 IS 18 
FEET. REFER TO WWPN30 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION.
NEXT WARNINGS AT 180900Z8, 181500Z5, 182100Z2 AND 190300Z3.
REFER TO TYPHOON 19W (PHANFONE) WARNINGS (WTPN32 PGTW)
FOR SIX-HOURLY UPDATES.//

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