WTPN31 PGTW 182100    
1. TROPICAL STORM 20W (VONGFONG) WARNING NR 014    
   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   181800Z8 --- NEAR 18.2N1 111.6E9
     MOVEMENT PAST SIX HOURS - 350 DEGREES AT 09 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT    
                            060 NM SOUTHEAST QUADRANT    
                            060 NM SOUTHWEST QUADRANT    
                            050 NM NORTHWEST QUADRANT    
   REPEAT POSIT: 18.2N1 111.6E9
    ---
   FORECASTS:
   12 HRS, VALID AT:
   190600Z6 --- 19.5N5 111.4E7
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT    
                            060 NM SOUTHEAST QUADRANT    
                            060 NM SOUTHWEST QUADRANT    
                            050 NM NORTHWEST QUADRANT    
   VECTOR TO 24 HR POSIT: 340 DEG/ 11 KTS
    ---
   24 HRS, VALID AT:
   191800Z9 --- 21.5N8 110.6E8
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   VECTOR TO 36 HR POSIT: 325 DEG/ 11 KTS
    ---
   36 HRS, VALID AT:
   200600Z8 --- 23.2N7 109.2E2
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
   VECTOR TO 48 HR POSIT: 300 DEG/ 13 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   201800Z1 --- 24.4N0 106.8E5
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    ---
REMARKS:
182100Z2 POSITION NEAR 18.5N4 111.6E9.
TROPICAL STORM (TS) 20W (VONGFONG), LOCATED APPROXIMATELY 280 NM 
SOUTH-SOUTHWEST OF HONG KONG, CHINA, HAS TRACKED NORTHWARD AT 09 
KNOTS OVER THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 
181730Z0 ENHANCED INFRARED SATELLITE IMAGERY AND SYNOPTIC FIXES. THE 
WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES 
OF 35 AND 45 KNOTS AND SYNOPTIC OBSERVATIONS. ANIMATED ENHANCED 
INFRARED IMAGERY SHOWS THE POLEWARD TRACK OVER THE LAST 6 HOURS AND 
INDICATES THE DEEP CONVECTION IS BEGINNING TO STACK OVER THE LOW 
LEVEL CIRCULATION CENTER IN A MORE FAVORABLE SHEAR ENVIRONMENT. 
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 181800Z8 IS 20 FEET. REFER TO
WWPN31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 
190300Z3, 190900Z9, 191500Z6 AND 192100Z3. REFER TO TYPHOON  19W 
(PHANFONE) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.//

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