
WTPS31 PGTW 272100
MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC//
SUBJ/TROPICAL CYCLONE 22P (TWENTYTWO) WARNING NR 001//
RMKS/
1. TROPICAL CYCLONE 22P (TWENTYTWO) WARNING NR 001
01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
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WARNING POSITION:
271800Z --- NEAR 12.9S 136.6E
MOVEMENT PAST SIX HOURS - 180 DEGREES AT 03 KTS
POSITION ACCURATE TO WITHIN 060 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
REPEAT POSIT: 12.9S 136.6E
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FORECASTS:
12 HRS, VALID AT:
280600Z --- 13.5S 136.5E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 200 DEG/ 03 KTS
---
24 HRS, VALID AT:
281800Z --- 14.0S 136.3E
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT
045 NM SOUTHEAST QUADRANT
045 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 225 DEG/ 03 KTS
---
36 HRS, VALID AT:
290600Z --- 14.4S 135.9E
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT
045 NM SOUTHEAST QUADRANT
045 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 260 DEG/ 03 KTS
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EXTENDED OUTLOOK:
48 HRS, VALID AT:
291800Z --- 14.5S 135.3E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 72 HR POSIT: 275 DEG/ 02 KTS
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72 HRS, VALID AT:
301800Z --- 14.4S 134.5E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
---
REMARKS:
272100Z POSITION NEAR 13.1S 136.6E.
TROPICAL CYCLONE (TC) 22P (TWENTYTWO), LOCATED APPROXIMATELY 340 NM
EAST OF DARWIN, AUSTRALIA, HAS TRACKED SOUTHWARD AT 03 KNOTS OVER
THE PAST SIX HOURS. ANIMATED INFRARED SATELLITE IMAGERY AND RADAR
IMAGERY FROM GOVE, AUSTRALIA SHOW INCREASED CONVECTIVE BANDING
AROUND A LOW LEVEL CIRCULATION CENTER (LLCC). THE LLCC IS LOCATED
JUST OFF THE COAST OF NORTHERN AUSTRALIA IN THE GULF OF CARPENTARIA.
THE INITIAL INTENSITY WAS BASED ON PGTW, KNES, AND ADRM DVORAK
ESTIMATES OF 35 KNOTS. UPPER LEVEL ANALYSIS SHOWS THE SYSTEM IS
LOCATED BENEATH THE SUBTROPICAL RIDGE AXIS WITH GOOD RADIAL OUTFLOW
AND LOW VERTICAL WIND SHEAR. TC 22P IS CURRENTLY LOCATED IN A WEAK
STEERING ENVIRONMENT AND IS SLOWLY TRACKING SOUTHWARD UNDER THE
INFLUENCE OF A NEAR EQUATORIAL RIDGE. TC 22P SHOULD BEGIN TO TURN
SOUTHWEST AND WESTWARD AS A SUBTROPICAL STEERING RIDGE TO THE SOUTH
BUILDS IN. AS TC 22P CONTINUES TRACKING OVER THE WARM WATERS OF THE
GULF OF CARPENTARIA, IT IS EXPECTED TO INTENSIFY UNTIL REACHING LAND
BY TAU 48 AND BEGIN DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE
AFTER TAU 72. AVAILABLE NUMERICAL MODEL GUIDANCE IS SPREAD DUE TO
THE WEAK STEERING ENVIRONMENT, HOWEVER, THIS FORECAST IS IN
AGREEMENT WITH THE MODELS INCLUDING GFDN, EGRR, AND NOGAPS, WHICH
TURN THE SYSTEM WESTWARD. THE GFS AND WBAR MODELS TRACK TC 22P
SOUTHEASTWARD AND SOUTHWARD, RESPECTIVELY, BECAUSE THEY FORECAST A
WEAKER SUBTROPICAL STEERING RIDGE THAN THE OTHER MODELS. THIS
WARNING SUPERSEDES AND CANCELS REF A, NAVMARFCSTCEN 271700Z MAR 10
TROPICAL CYCLONE FORMATION ALERT (WTPS21 PGTW 271700) MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 271800Z IS 12 FEET. NEXT WARNINGS AT
280900Z AND 282100Z.//
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