SUBJ: TROPICAL CYCLONE WARNING
WTPN32 PGTW 300300    
1. TROPICAL STORM 21W (MARIA) WARNING NR 009    
   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   300000Z3 --- NEAR 17.9N7 116.0E8
     MOVEMENT PAST SIX HOURS - 180 DEGREES AT 02 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 035 KT WINDS - 045 NM EAST SEMICIRCLE       
                            035 NM ELSEWHERE
   REPEAT POSIT: 17.9N7 116.0E8
    ---
   FORECASTS:
   12 HRS, VALID AT:
   301200Z6 --- 18.6N5 116.8E6
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   RADIUS OF 035 KT WINDS - 045 NM EAST SEMICIRCLE       
                            035 NM ELSEWHERE
   VECTOR TO 24 HR POSIT: 030 DEG/ 07 KTS
    ---
   24 HRS, VALID AT:
   310000Z4 --- 19.8N8 117.6E5
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   RADIUS OF 035 KT WINDS - 045 NM EAST SEMICIRCLE       
                            035 NM ELSEWHERE
   VECTOR TO 36 HR POSIT: 010 DEG/ 13 KTS
    ---
   36 HRS, VALID AT:
   311200Z7 --- 22.4N8 118.2E2
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   RADIUS OF 035 KT WINDS - 045 NM EAST SEMICIRCLE       
                            035 NM ELSEWHERE
   VECTOR TO 48 HR POSIT: 010 DEG/ 13 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   010000Z1 --- 25.0N7 118.7E7
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   VECTOR TO 72 HR POSIT: 005 DEG/ 09 KTS
    ---
   72 HRS, VALID AT:
   020000Z2 --- 28.5N5 119.1E2
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    ---
REMARKS:
300300Z6 POSITION NEAR 18.1N0 116.2E0.
TROPICAL STORM (TS) 21W (MARIA), LOCATED APPROXIMATELY 250 NM 
WEST OF LUZON, PHILIPPINES, HAS TRACKED SOUTHWARD AT 02 KNOTS OVER 
THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 292330Z8 VISIBLE 
AND INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON
SATELLITE CURRENT INTENSITY ESTIMATES OF 35 AND 45 KNOTS, AND 
SYNOPTIC DATA. ANIMATED INFRARED SATELLITE IMAGERY DEPICTS A 
PARTIALLY EXPOSED LOW-LEVEL CIRCULATION CENTER (LLCC) WITH 
CONVECTION WEST OF THE LLCC. ANIMATED WATER VAPOR IMAGERY INDICATES 
THAT OUTFLOW OVER THE SYSTEM HAS IMPROVED OVER THE PAST 6 HOURS. THE 
200 MB ANALYSIS INDICATES THAT THE SUBTROPICAL RIDGE IS NORTH OF TS 
21W. TS 21W IS FORECAST TO REMAIN QUASI-STATIONARY THROUGH THE NEXT 
12 HOURS. AFTERWARDS, TS 21W IS EXPECTED TO TRACK GENERALLY 
NORTHWARD AS THE LOW-MID LEVEL RIDGE BUILDS EAST OF THE SYSTEM. TS 
21W IS EXPECTED TO MAINTAIN INTENSITY UNDER A MARGINAL ENVIRONMENT. 
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 300000Z3 IS 12 FEET. REFER TO
WWPW30 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 
300900Z2 (DTG 300752Z7), 301500Z9 (DTG 301352Z4), 302100Z6 (DTG 
301952Z0) AND 310300Z7 (DTG 310152Z2). REFER TO TYPHOON 20W 
(PRAPIROON) WARNINGS (WTPN31 PGTW) FOR SIX-HOURLY UPDATES.//
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