Subject: Pacific-NW: 1. Typhoon Paka (05c) Warning Nr 074

From: SIU Weather Processor <[email-masked]>
Date: Sat, 20 Dec 1997 13:55:53 -0600

617
WTPN31 PGTW 202100
1. TYPHOON PAKA (05C) WARNING NR 074
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   201800Z1 --- 18.1N0 132.3E9
     MOVEMENT PAST SIX HOURS - 310 DEGREES AT 08 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT
   RADIUS OF 050 KT WINDS - 040 NM NORTH QUADRANT
                            020 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 130 NM NORTH QUADRANT
                            065 NM ELSEWHERE
   REPEAT POSIT: 18.1N0 132.3E9
    ---
   FORECASTS:
   12 HRS, VALID AT:
   210600Z9 --- 19.0N0 131.1E6
   MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
   RADIUS OF 050 KT WINDS - 030 NM NORTH QUADRANT
                            020 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 115 NM NORTH QUADRANT
                            050 NM ELSEWHERE
   VECTOR TO 24 HR POSIT: 280 DEG/ 07 KTS
    ---
   24 HRS, VALID AT:
   211800Z2 --- 19.2N2 129.7E9
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   RADIUS OF 035 KT WINDS - 090 NM NORTH QUADRANT
                            050 NM ELSEWHERE
   VECTOR TO 36 HR POSIT: 245 DEG/ 05 KTS
    ---
   36 HRS, VALID AT:
   220600Z0 --- 18.8N7 128.8E9
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   RADIUS OF 035 KT WINDS - 050 NM NORTH SEMICIRCLE
                            050 NM ELSEWHERE
   VECTOR TO 48 HR POSIT: 240 DEG/ 04 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   221800Z3 --- 18.4N3 128.1E2
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER
WATER
   VECTOR TO 72 HR POSIT: 235 DEG/ 04 KTS
    ---
   72 HRS, VALID AT:
   231800Z4 --- 17.5N3 126.7E6
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER
WATER
    ---
REMARKS:
212100Z POSITION: 18.3N2 131.7E2
TYPHOON PAKA (05C) IS MOVING NORTHWEST AT 08 KNOTS.  THE
WARNING POSITION IS BASED UPON 211730Z4 ENHANCED INFRARED
SATELLITE IMAGERY. THE SYSTEM CONTINUES TO WEAKEN
RAPIDLY, AND A MICROWAVE IMAGER PASS AT 201136Z REVEALED
THAT THE LOW LEVEL CIRCULATION CENTER IS NOW EXPOSED.
CONVECTION CONTINUES TO DECREASE AND THIS SYSTEM IS
EXPECTED TO DISSIPATE OVER THE WATER BY 72 HOURS.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 181800Z IS 20 FEET.
REFER TO WWPW31 PGFW FOR ADDITIONAL SEA HEIGHT
INFORMATION.  NEXT WARNINGS AT 210300Z6 (DTG 210151Z0),
210900Z2 (DTG 210751Z6), 211500Z9 (DTG 211351Z3) AND
212100Z6 (DTG 211951Z9).//

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