Subject: Pacific-NW: 1. Typhoon Keith (29w) Warning Nr 031

From: SIU Weather Processor <[email-masked]>
Date: Tue, 4 Nov 1997 02:34:57 -0600

935
WTPN31 PGTW 040900
1. TYPHOON KEITH (29W) WARNING NR 031
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   040600Z0 --- 16.5N2 136.2E2
     MOVEMENT PAST SIX HOURS - 290 DEGREES AT 09 KTS
     POSITION ACCURATE TO WITHIN 030 NM
     POSITION BASED ON EYE FIXED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 125 KT, GUSTS 150 KT
   RADIUS OF 100 KT WINDS - 020 NM
   RADIUS OF 050 KT WINDS - 120 NM NORTH SEMICIRCLE
                            090 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 240 NM NORTH SEMICIRCLE
                            180 NM ELSEWHERE
   REPEAT POSIT: 16.5N2 136.2E2
    ---
   FORECASTS:
   12 HRS, VALID AT:
   041800Z3 --- 17.0N8 134.6E4
   MAX SUSTAINED WINDS - 120 KT, GUSTS 145 KT
   RADIUS OF 100 KT WINDS - 020 NM
   RADIUS OF 050 KT WINDS - 120 NM NORTH SEMICIRCLE
                            090 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 240 NM NORTH SEMICIRCLE
                            180 NM ELSEWHERE
   VECTOR TO 24 HR POSIT: 335 DEG/ 06 KTS
    ---
   24 HRS, VALID AT:
   050600Z1 --- 18.1N0 134.0E8
   MAX SUSTAINED WINDS - 115 KT, GUSTS 140 KT
   RADIUS OF 100 KT WINDS - 020 NM
   RADIUS OF 050 KT WINDS - 100 NM NORTHEAST SEMICIRCLE
                            080 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 220 NM NORTHEAST SEMICIRCLE
                            165 NM ELSEWHERE
   VECTOR TO 36 HR POSIT: 005 DEG/ 08 KTS
    ---
   36 HRS, VALID AT:
   051800Z4 --- 19.6N6 134.1E9
   MAX SUSTAINED WINDS - 110 KT, GUSTS 135 KT
   RADIUS OF 100 KT WINDS - 020 NM
   RADIUS OF 050 KT WINDS - 075 NM EAST SEMICIRCLE
                            055 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 190 NM EAST SEMICIRCLE
                            140 NM ELSEWHERE
   VECTOR TO 48 HR POSIT: 020 DEG/ 09 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   060600Z2 --- 21.3N6 134.7E5
   MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT
   RADIUS OF 100 KT WINDS - 020 NM
   RADIUS OF 050 KT WINDS - 070 NM EAST SEMICIRCLE
                            050 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 160 NM EAST SEMICIRCLE
                            110 NM ELSEWHERE
   VECTOR TO 72 HR POSIT: 025 DEG/ 12 KTS
    ---
   72 HRS, VALID AT:
   070600Z3 --- 25.5N2 137.0E1
   MAX SUSTAINED WINDS - 085 KT, GUSTS 105 KT
   RADIUS OF 050 KT WINDS - 065 NM EAST SEMICIRCLE
                            045 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 135 NM EAST SEMICIRCLE
                            105 NM ELSEWHERE
    ---
REMARKS:
040900Z3 POSITION 16.6N3  135.8E7
TYPHOON KEITH (29W) IS MOVING WEST-NORTHWESTWARD AT 09
KNOTS. THE WARNING POSITION IS BASED UPON 040530Z2 VISIBLE
SATELLITE IMAGERY. THE SYSTEM CONTINUES TO SLOWLY WEAKEN AND
THE WARNING INTENSITY IS BASED UPON A DVORAK SATELLITE
INTENSITY ESTIMATE OF CI 6.5 (127 KNOTS). THE WIND RADII WERE
ENLARGED DUE TO SEVERAL SHIP REPORTS AND A 040115Z1
SCATTEROMETER PASS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 040600Z0
IS 32 FEET. REFER TO WWPW30 PGFW FOR ADDITIONAL SEA HEIGHT
INFORMATION. NEXT WARNINGS AT 041500Z0 (DTG 041351Z4), 042100Z7
(DTG 041951Z0), 050300Z8 (DTG 050151Z2) AND 050900Z4 (DTG
050751Z8).//

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