SUBJ:  TROPICAL CYCLONE WARNING
REF/A/NAVPACMETOCCEN PEARL HARBOR HI/271321Z JUL 00//
AMPN/TROPICAL CYCLONE FORMATION ALERT//
WTPN32 PGTW 280300    
1. TROPICAL DEPRESSION 12W WARNING NR 001    
   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   280000Z0 --- NEAR 9.0N9 176.5E9
     MOVEMENT PAST SIX HOURS - 285 DEGREES AT 11 KTS
     POSITION ACCURATE TO WITHIN 040 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   REPEAT POSIT: 9.0N9 176.5E9
    ---
   FORECASTS:
   12 HRS, VALID AT:
   281200Z3 --- 9.6N5 174.3E5
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   VECTOR TO 24 HR POSIT: 290 DEG/ 11 KTS
    ---
   24 HRS, VALID AT:
   290000Z1 --- 10.4N5 172.2E2
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   VECTOR TO 36 HR POSIT: 305 DEG/ 10 KTS
    ---
   36 HRS, VALID AT:
   291200Z4 --- 11.5N7 170.5E3
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   VECTOR TO 48 HR POSIT: 305 DEG/ 09 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   300000Z3 --- 12.5N8 168.9E4
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   VECTOR TO 72 HR POSIT: 310 DEG/ 08 KTS
    ---
   72 HRS, VALID AT:
   310000Z4 --- 14.5N0 166.4E7
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
    ---
REMARKS:
280300Z3 POSITION NEAR 9.2N1 176.0E4.
TROPICAL DEPRESSION 12W HAS DEVELOPED JUST WEST OF THE INTERNATIONAL 
DATELINE. TROPICAL DEPRESSION 12W, LOCATED ABOUT 518 NM EAST OF 
KWAJALEIN, HAS TRACKED WEST-NORTHWESTWARD AT 11 KNOTS DURING THE 
PAST 6 HOURS.  THE WARNING POSITION IS BASED ON 272330Z7 VISIBLE
SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE 
CURRENT INTENSITY ESTIMATES OF 25 TO 30 KNOTS AND SYNOPTIC REPORTS. 
ANIMATED VISIBLE IMAGERY DEPICTS INCREASE IN AREAL COVERAGE OVER THE
PAST 3 HOURS. ANIMATION ALSO REVEALS A PARTIALLY EXPOSED LOW-LEVEL
CIRCULATION CENTER. TD 12W IS FORECAST TO TRACK WEST-NORTHWESTWARD
THROUGH THE PERIOD. THE SYSTEM SHOULD INTENSIFY AT A NEAR
CLIMATOLOGICAL RATE WITHIN A MARGINAL ENVIRONMENT DURING THE 
FORECAST PERIOD. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 280000Z0 IS 8 
FEET. REFER TO WWPW30 RJTX  FOR ADDITIONAL SEA HEIGHT INFORMATION. 
THIS WARNING SUPERSEDES AND CANCELS REF A, NAVPACMETOCCEN 271321Z 
JUL 00 TROPICAL CYCLONE FORMATION ALERT (WTPN22 PGTW 271330) NEXT 
WARNINGS AT 280900Z9 (DTG 280752Z4), 281500Z6 (DTG 281352Z1), 
282100Z3 (DTG 281952Z7) AND 290300Z4 (DTG 290152Z9). REFER TO 
TROPICAL STORM BOLAVEN (11W) WARNINGS (WTPN31 PGTW) FOR SIX-HOURLY 
UPDATES.//



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