WTPS31 PGTW 060900
MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA
AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR
1. TROPICAL CYCLONE 07P (HETA) WARNING
NR 022
01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
---
WARNING POSITION:
060600Z2 --- NEAR 19.7S7 169.8W4
MOVEMENT PAST SIX HOURS - 145 DEGREES AT 17 KTS
POSITION ACCURATE TO WITHIN 040 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 125 KT, GUSTS 150 KT
RADIUS OF 100 KT WINDS - 025 NM
RADIUS OF 050 KT WINDS - 150 NM NORTHEAST
QUADRANT
120 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 230 NM NORTHEAST
QUADRANT
230 NM SOUTHEAST QUADRANT
170 NM SOUTHWEST QUADRANT
230 NM NORTHWEST QUADRANT
REPEAT POSIT: 19.7S7 169.8W4
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FORECASTS:
12 HRS, VALID AT:
061800Z5 --- 22.5S9 167.4W8
MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT
RADIUS OF 050 KT WINDS - 140 NM NORTHEAST
QUADRANT
110 NM SOUTHEAST QUADRANT
070 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 220 NM NORTHEAST
QUADRANT
220 NM SOUTHEAST QUADRANT
170 NM SOUTHWEST QUADRANT
220 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 140 DEG/ 17 KTS
---
24 HRS, VALID AT:
070600Z3 --- 25.1S8 164.9W0
MAX SUSTAINED WINDS - 080 KT, GUSTS 100 KT
BECOMING EXTRATROPICAL
RADIUS OF 050 KT WINDS - 100 NM NORTHEAST
QUADRANT
090 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 210 NM NORTHEAST
QUADRANT
210 NM SOUTHEAST QUADRANT
170 NM SOUTHWEST QUADRANT
210 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 140 DEG/ 17 KTS
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36 HRS, VALID AT:
071800Z6 --- 27.6S5 162.4W3
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
BECOMING EXTRATROPICAL
RADIUS OF 050 KT WINDS - 080 NM
RADIUS OF 034 KT WINDS - 180 NM NORTHEAST
QUADRANT
200 NM SOUTHEAST QUADRANT
170 NM SOUTHWEST QUADRANT
170 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 140 DEG/ 18 KTS
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EXTENDED OUTLOOK:
48 HRS, VALID AT:
080600Z4 --- 30.3S6 159.6W1
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
EXTRATROPICAL
RADIUS OF 034 KT WINDS - 180 NM NORTHEAST
QUADRANT
200 NM SOUTHEAST QUADRANT
180 NM SOUTHWEST QUADRANT
180 NM NORTHWEST QUADRANT
---
REMARKS:
060900Z5 POSITION NEAR 20.4S6 169.2W8.
TROPICAL CYCLONE (TC) 07P (HETA), LOCATED APPROXIMATELY 360 NM SOUTH-SOUTHEAST OF PAGO PAGO, AMERICAN SAMOA, HAS TRACKED SOUTHEASTWARD AT 17 KNOTS OVER THE PAST SIX HOURS. THE WARNING POSITION IS BASED ON 060530Z4 INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 127 KNOTS. A RECENT MICROWAVE PASS DEPICTS A 10 NM EYE FEATURE. THE SYSTEM HAS ACCELERATED TOWARDS THE SOUTHEAST UNDER THE INFLUENCE OF A MID-LEVEL STEERING RIDGE TO THE EAST. TC 07P SHOULD CONTINUE TO TRACK SOUTHEASTERLY THROUGH THE FORECAST PERIOD AS IT BEGINS TO INTERACT WITH MID-LATITUDE NORTHWESTERLIES ASSOCIATED WITH A TROUGH TO THE WEST. THE SYSTEM SHOULD CONTINUE TO WEAKEN AS IT ENCOUNTERS INCREASING VERTICAL WIND SHEAR ON ITS WAY TO BECOMING AN EXTRATROPICAL SYSTEM. THE AVAILABLE DYNAMIC AIDS CONSISTING OF NOGAPS, UKMET (EGRR), GFDN, AND NCEP GFS ARE IN GOOD AGREEMENT WITH THIS SCENARIO. THIS FORECAST IS BASED ON A BLEND OF PERSISTENCE AND THE AVAILABLE DYNAMIC AIDS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 060600Z2 IS 40 FEET. NEXT WARNINGS AT 062100Z9 AND 070900Z6.//
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