Subject: Pacific-NW: 1. Typhoon Keith (29w) Warning Nr 037

From: SIU Weather Processor <[email-masked]>
Date: Wed, 5 Nov 1997 14:49:15 -0600

951
WTPN31 PGTW 052100
1. TYPHOON KEITH (29W) WARNING NR 037
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   051800Z4 --- 19.9N9 135.8E7
     MOVEMENT PAST SIX HOURS - 015 DEGREES AT 09 KTS
     POSITION ACCURATE TO WITHIN 045 NM
     POSITION BASED ON EYE FIXED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 095 KT, GUSTS 115 KT
   RADIUS OF 050 KT WINDS - 110 NM SOUTHWEST QUADRANT
                            140 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 180 NM SOUTHWEST QUADRANT
                            220 NM ELSEWHERE
   REPEAT POSIT: 19.9N9 135.8E7
    ---
   FORECASTS:
   12 HRS, VALID AT:
   060600Z2 --- 22.0N4 136.4E4
   MAX SUSTAINED WINDS - 090 KT, GUSTS 110 KT
   RADIUS OF 050 KT WINDS - 130 NM NORTHEAST SEMICIRCLE
                            100 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 220 NM NORTHEAST SEMICIRCLE
                            180 NM ELSEWHERE
   VECTOR TO 24 HR POSIT: 030 DEG/ 14 KTS
    ---
   24 HRS, VALID AT:
   061800Z5 --- 24.3N9 138.0E2
   MAX SUSTAINED WINDS - 080 KT, GUSTS 100 KT
   RADIUS OF 050 KT WINDS - 100 NM EAST SEMICIRCLE
                            070 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 220 NM EAST SEMICIRCLE
                            160 NM ELSEWHERE
   VECTOR TO 36 HR POSIT: 055 DEG/ 17 KTS
    ---
   36 HRS, VALID AT:
   070600Z3 --- 26.3N1 141.1E7
   MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
   BECOMING EXTRATROPICAL
   RADIUS OF 050 KT WINDS - 090 NM SOUTHEAST SEMICIRCLE
                            050 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 200 NM SOUTHEAST SEMICIRCLE
                            140 NM ELSEWHERE
   VECTOR TO 48 HR POSIT: 060 DEG/ 20 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   071800Z6 --- 28.4N4 145.0E0
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   BECOMING EXTRATROPICAL
   RADIUS OF 050 KT WINDS - 075 NM SOUTHEAST SEMICIRCLE
                            040 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 170 NM SOUTHEAST SEMICIRCLE
                            100 NM ELSEWHERE
   VECTOR TO 72 HR POSIT: 065 DEG/ 20 KTS
    ---
   72 HRS, VALID AT:
   081800Z7 --- 31.5N9 153.4E3
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   EXTRATROPICAL
   RADIUS OF 050 KT WINDS - 050 NM SOUTHEAST SEMICIRCLE
                            035 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 160 NM SOUTHEAST SEMICIRCLE
                            090 NM ELSEWHERE
    ---
REMARKS:
052100Z8 POSITION 20.4N6  135.9E8
LATEST SATELLITE IMAGERY INDICATES THAT OVER THE PAST 3
HOURS THAT TYPHOON KEITH(29W) HAS DEVELOPED A CLOUD-
FILLED EYE AS IT CONTINUES TO WEAKEN AND MOVE POLEWARD.
THE CURRENT INTENSITY AND WARNING POSITION ARE BASED ON
051730Z6 INFRARED SATELLITE IMAGERY. THIS FORECAST HAS TY
KEITH ACCELERATING SLOWLY WHILE BEGINNING TO TRANSITION
INTO AN EXTRATROPICAL LOW PRESSURE SYSTEM AFTER THE 36
HOUR FORECAST PERIOD. CURRENT WIND RADII ADJUSTED FOR A
051329Z0 SCATTEROMETER PASS. MAXIMUM SIGNIFICANT WAVE
HEIGHT AT 051800Z4 IS 28 FEET. REFER TO WWPW31 PGFW FOR
ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT
060300Z9 (DTG 060153Z5), 060900Z5 (DTG 060753Z1),
061500Z2 (DTG 061353Z8) AND 062100Z9 (DTG 061953Z4).//

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