Subject: Pacific-NW: Marine Warning -252207 (AUTOMATIC)

From: Charley Kline <[email-masked]>
Date: Sun, 25 Aug 1996 22:07:15 -0500

ZCZC DD+ 77437
WTPN31 PGTW 260300
1. TROPICAL DEPRESSION 21W WARNING NR 001
   03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   260000Z8 --- 31.4N8 161.9E7
     MOVEMENT PAST SIX HOURS - 360 DEGREES AT 05 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   REPEAT POSIT: 31.4N8 161.9E7
    ---
   FORECASTS:
   12 HRS, VALID AT:
   261200Z1 --- 32.3N8 161.8E6
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   VECTOR TO 24 HR POSIT: 350 DEG/ 04 KTS
    ---
   24 HRS, VALID AT:
   270000Z9 --- 33.1N7 161.6E4
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   VECTOR TO 36 HR POSIT: 335 DEG/ 04 KTS
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER
WATER
    ---
   36 HRS, VALID AT:
   271200Z2 --- 33.9N5 161.2E0
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER
WATER
    ---
REMARKS:
260300Z1 POSITION 31.6N0  161.9E7
TROPICAL DEPRESSION 21W HAS DEVELOPED WITHIN THE MONSOON
TROUGH, BETWEEN TROPICAL STORM PIPER (20W) AND TYPHOON
ORSON (19W). WARNING INTENSITY IS BASED ON SATELLITE
IMAGERY ANALYSIS AND SATELLITE-BASED MICROWAVE IMAGERY
(SSM/I) ANALYSIS, WHICH SUPPORT A WELL-DEFINED LOW-LEVEL
CIRCULATION WITH 25 KNOT WINDS. THE SYSTEM IS CURRENTLY
LOCATED WITHIN A MODERATE VERTICAL WINDSHEAR ENVIRONMENT
DUE TO THE UPPER-LEVEL OUTFLOW FROM TYPHOON ORSON (19W).
VERTICAL WINDSHEAR IS EXPECTED TO INCREASE OVER THE NEXT
24 HOURS; THEREFORE, THE SYSTEM IS EXPECTED TO WEAKEN AND
EVENTUALLY DISSIPATE OVER WATER. NEXT WARNINGS AT
261500Z4 (DTG 261353Z0) AND 270300Z2 (DTG 270153Z8).
IF THE JOINT TYPHOON WARNING CENTER ANTICIPATES THAT THIS
TROPICAL DEPRESSION WILL REACH TROPICAL STORM INTENSITY,
THEN A STANDARD 72 HOUR TROPICAL CYCLONE WARNING WILL BE
ISSUED. OTHERWISE, 36 HOUR TROPICAL DEPRESSION WARNINGS
WILL BE UPDATED EVERY 12 HOURS. THIS WARNING SUPERSEDES
AND CANCELS NAVPACMETOCCEN WEST GU 252321Z AUG 96
TROPICAL CYCLONE FORMATION ALERT (WTPN21 PGTW 252330).
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 260000Z IS 09 FEET.
REFER TO WWPW30 PGFW FOR ADDITIONAL SEA HEIGHT
INFORMATION. REFER TO TYPHOON ORSON (19W) (WTPN32 PGTW),
AND TROPICAL STORM PIPER (20W) FOR SIX-HOURLY UPDATES.//

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