Advisories

WTPN32 PGTW 240900
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 18W (NARRA) WARNING NR 015//
RMKS/
1. TROPICAL STORM 18W (NARRA) WARNING NR 015    
   03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   240600Z --- NEAR 19.9N 107.3E
     MOVEMENT PAST SIX HOURS - 215 DEGREES AT 05 KTS
     POSITION ACCURATE TO WITHIN 030 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT
                            050 NM SOUTHEAST QUADRANT
                            070 NM SOUTHWEST QUADRANT
                            040 NM NORTHWEST QUADRANT
   REPEAT POSIT: 19.9N 107.3E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   241800Z --- 19.6N 107.5E
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT
                            050 NM SOUTHEAST QUADRANT
                            070 NM SOUTHWEST QUADRANT
                            030 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 085 DEG/ 04 KTS
    ---
   24 HRS, VALID AT:
   250600Z --- 19.7N 108.4E
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 020 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            060 NM SOUTHWEST QUADRANT
                            020 NM NORTHWEST QUADRANT
   VECTOR TO 36 HR POSIT: 045 DEG/ 06 KTS
    ---
   36 HRS, VALID AT:
   251800Z --- 20.5N 109.3E
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   VECTOR TO 48 HR POSIT: 025 DEG/ 06 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   260600Z --- 21.6N 109.8E
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
   VECTOR TO 60 HR POSIT: 005 DEG/ 06 KTS
    ---
   60 HRS, VALID AT:
   261800Z --- 22.7N 109.9E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    ---
REMARKS:
240900Z POSITION NEAR 19.8N 107.3E. 24AUG26. TROPICAL STORM 18W 
(NARRA), LOCATED APPROXIMATELY 103 NM SOUTHEAST OF HANOI, VIETNAM, HAS 
TRACKED SOUTHWESTWARD AT 05 KNOTS OVER THE PAST SIX HOURS. MINIMUM 
CENTRAL PRESSURE AT 240600Z IS 989 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT 
AT 240600Z IS 13 FEET. NEXT WARNINGS AT 241500Z, 242100Z, 250300Z AND 
250900Z. REFER TO TYPHOON 17W (SAUDEL) WARNINGS (WTPN31 PGTW) FOR SIX-
HOURLY UPDATES. REFER TO TROPICAL DEPRESSION 19W (ATSANI) WARNINGS 
(WTPN33 PGTW) FOR SIX-HOURLY UPDATES.//
NNNN