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Tropical Cyclone ZENA : JTWC Advisories
Season 2015-2016 Summaries (Operational Data): [AU] [SIO] [SPAC] [SH]
---> Tropical Cyclone ZENA Track Map and Data

WTPS22 PGTW 20160404 21:30z
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
140 NM EITHER SIDE OF A LINE FROM 13.6S 162.7E TO 17.2S 171.2E
WITHIN THE NEXT 06 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY
ISSUANCE OF NUMBERED TROPICAL CYCLONE WARNINGS AT THIS TIME.
WINDS IN THE AREA ARE ESTIMATED TO BE 25 TO 30 KNOTS. METSAT
IMAGERY AT 041800Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 13.8S 163.1E. THE SYSTEM IS MOVING EAST-SOUTHEASTWARD AT 08
KNOTS.
2. REMARKS: THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 12.9S
161.6E IS NOW LOCATED NEAR 13.8S 163.1E, APPROXIMATELY 385 NM
NORTHWEST OF PORT VILA, VANUATU. ANIMATED MULTISPECTRAL SATELLITE
IMAGERY DEPICTS FORMATIVE, DEEP CONVECTIVE BANDING WRAPPING INTO THE
SYSTEM. A 041714Z SSMIS 91 GHZ IMAGE REVEALS TIGHTLY CURVED
CONVECTIVE BANDING WRAPPING INTO A WELL-DEFINED LOW-LEVEL
CIRCULATION CENTER. UPPER-LEVEL ANALYSIS INDICATES A FAVORABLE
ENVIRONMENT WITH LOW-MODERATE (10 TO 20 KNOTS) VERTICAL WIND SHEAR
(VWS) AND RADIAL OUTFLOW. DYNAMIC MODEL GUIDANCE IS IN FAIR
AGREEMENT ON 97P TRACKING SOUTHEASTWARD, AND STEERED BY A NEAR
EQUATORIAL RIDGE TO THE NORTH. THIS SYSTEM HAS A SHORT WINDOW FOR
INTENSIFICATION OVER THE NEXT 36 TO 48 HOURS UNDER A FAVORABLE UPPER-
LEVEL ENVIRONMENT. AFTER TAU 48, 97P WILL BEGIN TO WEAKEN AS IT
ENCOUNTERS UNFAVORABLE VWS ASSOCIATED WITH AN APPROACHING TROUGH.
MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED TO BE NEAR 25 TO 30
KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1003 MB.
THE POTENTIAL FOR DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE
WITHIN THE NEXT 24 HOURS IS HIGH.
3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY
052130Z.//
=========================================================================
WTPS31 PGTW 20160405 09:00z
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 18P (EIGHTEEN) WARNING NR 001//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/042121ZAPR2016//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.//
RMKS/
1. TROPICAL CYCLONE 18P (EIGHTEEN) WARNING NR 001
   01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   050600Z --- NEAR 14.8S 166.4E
     MOVEMENT PAST SIX HOURS - 110 DEGREES AT 18 KTS
     POSITION ACCURATE TO WITHIN 045 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: 14.8S 166.4E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   051800Z --- 16.6S 170.1E
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
                            060 NM SOUTHEAST QUADRANT
                            060 NM SOUTHWEST QUADRANT
                            070 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 110 DEG/ 22 KTS
    ---
   24 HRS, VALID AT:
   060600Z --- 18.1S 174.4E
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 075 NM NORTHEAST QUADRANT
                            065 NM SOUTHEAST QUADRANT
                            065 NM SOUTHWEST QUADRANT
                            075 NM NORTHWEST QUADRANT
   VECTOR TO 36 HR POSIT: 105 DEG/ 23 KTS
    ---
   36 HRS, VALID AT:
   061800Z --- 19.2S 179.1E
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
                            060 NM SOUTHEAST QUADRANT
                            060 NM SOUTHWEST QUADRANT
                            070 NM NORTHWEST QUADRANT
   VECTOR TO 48 HR POSIT: 095 DEG/ 20 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   070600Z --- 19.6S 176.6W
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
050900Z POSITION NEAR 15.3S 167.3E.
TROPICAL CYCLONE (TC) 18P (EIGHTEEN), LOCATED APPROXIMATELY 718 NM
WEST-NORTHWEST OF SUVA, FIJI, HAS TRACKED EAST-SOUTHEASTWARD AT
18 KNOTS OVER THE PAST SIX HOURS. CURRENTLY THE SYSTEM IS TRACKING
OVER THE NORTHERN SECTION OF THE ISLAND OF ESPIRITU SANTO. ANIMATED
MULTISPECTRAL SATELLITE IMAGERY DEPICTS A CONSOLIDATING LOW-LEVEL
CIRCULATION CENTER WITH IMPROVED DEEP CONVECTIVE BANDING. A 050700Z
SSMIS 91GHZ IMAGE SHOWS A COMPACT CONVECTIVE CORE WITH DEEP
CONVECTIVE BANDING WRAPPING TIGHTLY AROUND A WELL-DEFINED CENTER.
SURFACE OBSERVATIONS FROM NVSS (91554) INDICATE EASTERLY SUSTAINED
WINDS OF 21 KNOTS WITH SLP NEAR 998MB (HOWEVER, THIS SITE IS LOCATED
ON THE SOUTHEAST CORNER OF ESPIRITU SANTO THUS LIKELY SHIELDED BY
THE 5000 TO 6000 FOOT NORTH-SOUTH ORIENTED MOUNTAIN RANGE ALONG THE
WEST COAST). THE INITIAL INTENSITY IS ASSESSED AT 35 KNOTS BASED ON
DVORAK ESTIMATES OF 35 KNOTS FROM ALL AGENCIES. UPPER-LEVEL ANALYSIS
INDICATES A FAVORABLE ENVIRONMENT WITH LOW-MODERATE (10 TO 20 KNOTS)
VERTICAL WIND SHEAR (VWS) AND RADIAL OUTFLOW. TC 18P IS FORECAST TO
TRACK EAST-SOUTHEASTWARD TO EASTWARD THROUGH THE FORECAST PERIOD AS
IT TRACKS WITHIN ENHANCED FLOW BETWEEN THE SUBTROPICAL RIDGE AND A
BROAD SHORTWAVE TROUGH. DYNAMIC GUIDANCE IS IN TIGHT AGREEMENT,
THEREFORE, THERE IS HIGH CONFIDENCE IN THE JTWC FORECAST TRACK. TC
18P IS FORECAST TO INTENSIFY THROUGH TAU 24 UNDER FAVORABLE
CONDITIONS. AFTER TAU 24, INCREASING VERTICAL WIND SHEAR ASSOCIATED
WITH THE SUBTROPICAL WESTERLIES WILL SERVE TO RAPIDLY WEAKEN THE
SYSTEM LEADING TO DISSIPATION BY TAU 48. AFTER TAU 48, THE REMNANTS
ARE EXPECTED TO BECOME QUASI-STATIONARY IN THE FIJI REGION AS A LOW-
LEVEL HIGH BUILDS IN. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 050600Z IS
12 FEET. NEXT WARNINGS AT 052100Z AND 060900Z. THIS CANCELS AND
SUPERSEDES REF A (WTPS22 PGTW 042130).//
=========================================================================
WTPS31 PGTW 20160405 21:00z
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 18P (ZENA) WARNING//
RMKS/
1. TROPICAL CYCLONE 18P (ZENA) WARNING NR 002
   01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   051800Z --- NEAR 16.6S 170.3E
     MOVEMENT PAST SIX HOURS - 115 DEGREES AT 23 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
                            030 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            030 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT
                            075 NM SOUTHEAST QUADRANT
                            055 NM SOUTHWEST QUADRANT
                            055 NM NORTHWEST QUADRANT
   REPEAT POSIT: 16.6S 170.3E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   060600Z --- 18.3S 174.5E
   MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 064 KT WINDS - 010 NM NORTHEAST QUADRANT
                            015 NM SOUTHEAST QUADRANT
                            010 NM SOUTHWEST QUADRANT
                            010 NM NORTHWEST QUADRANT
   RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
                            030 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            030 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT
                            075 NM SOUTHEAST QUADRANT
                            055 NM SOUTHWEST QUADRANT
                            055 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 105 DEG/ 23 KTS
    ---
   24 HRS, VALID AT:
   061800Z --- 19.5S 179.2E
   MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
                            030 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            030 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT
                            075 NM SOUTHEAST QUADRANT
                            055 NM SOUTHWEST QUADRANT
                            055 NM NORTHWEST QUADRANT
   VECTOR TO 36 HR POSIT: 100 DEG/ 25 KTS
    ---
   36 HRS, VALID AT:
   070600Z --- 20.4S 175.6W
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT
                            070 NM SOUTHEAST QUADRANT
                            055 NM SOUTHWEST QUADRANT
                            055 NM NORTHWEST QUADRANT
   VECTOR TO 48 HR POSIT: 095 DEG/ 21 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   071800Z --- 20.7S 171.1W
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
052100Z POSITION NEAR 17.0S 171.3E. TROPICAL CYCLONE (TC) 18P
(ZENA), LOCATED APPROXIMATELY 472 NM WEST OF SUVA, FIJI, HAS TRACKED
EAST-SOUTHEASTWARD AT 23 KNOTS OVER THE PAST SIX HOURS. ANIMATED
INFRARED SATELLITE IMAGERY DEPICTS A TIGHT LOW-LEVEL CIRCULATION
CENTER SURROUNDED BY DEEP CONVECTIVE BANDING. A 051701Z SSMIS 91GHZ
IMAGE SHOWS A VERY COMPACT CONVECTIVE CORE WITH A WELL-DEFINED
MICROWAVE EYE FEATURE. THE INITIAL INTENSITY IS ASSESSED AT 65 KNOTS
BASED ON DVORAK ESTIMATES OF T4.0 FROM ALL AGENCIES. UPPER-LEVEL
ANALYSIS INDICATES A FAVORABLE ENVIRONMENT WITH LOW-MODERATE (10 TO
20 KNOTS)VERTICAL WIND SHEAR (VWS) WITH GOOD POLEWARD OUTFLOW. TC
18P IS FORECAST TO TRACK EAST-SOUTHEASTWARD TO EASTWARD THROUGH THE
FORECAST PERIOD AS IT TRACKS WITHIN ENHANCED FLOW BETWEEN THE
SUBTROPICAL RIDGE AND A BROAD SHORTWAVE TROUGH. DYNAMIC GUIDANCE IS
IN TIGHT AGREEMENT, THEREFORE, THERE IS HIGH CONFIDENCE IN THE JTWC
FORECAST TRACK. TC 18P IS FORECAST TO INTENSIFY SLIGHTLY THROUGH TAU
12 UNDER FAVORABLE CONDITIONS. AFTER TAU 12, INCREASING VWS
ASSOCIATED WITH THE SUBTROPICAL WESTERLIES WILL SERVE TO RAPIDLY
WEAKEN THE SYSTEM LEADING TO DISSIPATION BY TAU 48. AFTER TAU 48,
THE REMNANTS OF TC 18P ARE EXPECTED TO BECOME QUASI-STATIONARY EAST
OF FIJI, AS A LOW-LEVEL RIDGE BUILDS IN. MAXIMUM SIGNIFICANT WAVE
HEIGHT AT 051800Z IS 18 FEET. NEXT WARNINGS AT 060300Z, 060900Z,
061500Z AND 062100Z.//
=========================================================================
WTPS31 PGTW 20160406 03:00z
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 18P (ZENA) WARNING NR 003//
RMKS/
1. TROPICAL CYCLONE 18P (ZENA) WARNING NR 003
   01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   060000Z --- NEAR 17.7S 172.8E
     MOVEMENT PAST SIX HOURS - 115 DEGREES AT 26 KTS
     POSITION ACCURATE TO WITHIN 015 NM
     POSITION BASED ON EYE FIXED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 090 KT, GUSTS 110 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 064 KT WINDS - 015 NM NORTHEAST QUADRANT
                            015 NM SOUTHEAST QUADRANT
                            015 NM SOUTHWEST QUADRANT
                            015 NM NORTHWEST QUADRANT
   RADIUS OF 050 KT WINDS - 020 NM NORTHEAST QUADRANT
                            020 NM SOUTHEAST QUADRANT
                            020 NM SOUTHWEST QUADRANT
                            020 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            035 NM NORTHWEST QUADRANT
   REPEAT POSIT: 17.7S 172.8E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   061200Z --- 19.3S 177.4E
   MAX SUSTAINED WINDS - 090 KT, GUSTS 110 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 064 KT WINDS - 015 NM NORTHEAST QUADRANT
                            015 NM SOUTHEAST QUADRANT
                            015 NM SOUTHWEST QUADRANT
                            015 NM NORTHWEST QUADRANT
   RADIUS OF 050 KT WINDS - 020 NM NORTHEAST QUADRANT
                            020 NM SOUTHEAST QUADRANT
                            020 NM SOUTHWEST QUADRANT
                            020 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            035 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 105 DEG/ 23 KTS
    ---
   24 HRS, VALID AT:
   070000Z --- 20.4S 177.8W
   MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 064 KT WINDS - 015 NM NORTHEAST QUADRANT
                            015 NM SOUTHEAST QUADRANT
                            015 NM SOUTHWEST QUADRANT
                            015 NM NORTHWEST QUADRANT
   RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
                            030 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            030 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
                            060 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            045 NM NORTHWEST QUADRANT
   VECTOR TO 36 HR POSIT: 100 DEG/ 21 KTS
    ---
   36 HRS, VALID AT:
   071200Z --- 21.0S 173.3W
   MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   BECOMING SUBTROPICAL
   RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            030 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
                            070 NM SOUTHEAST QUADRANT
                            050 NM SOUTHWEST QUADRANT
                            055 NM NORTHWEST QUADRANT
   VECTOR TO 48 HR POSIT: 095 DEG/ 20 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   080000Z --- 21.2S 169.1W
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   SUBTROPICAL

    ---
REMARKS:
060300Z POSITION NEAR 18.1S 173.9E.
TROPICAL CYCLONE (TC) 18P (ZENA), LOCATED APPROXIMATELY 321 NM WEST
OF SUVA, FIJI, HAS TRACKED EAST-SOUTHEASTWARD AT 26 KNOTS OVER THE
PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY REVEALS A
5 NM WIDE PINHOLE EYE FEATURE WITH PERSISTENT, DEEP CONVECTION
AROUND THE SYSTEM, WHICH SUPPORTS THE CURRENT BEST TRACK POSITION
WITH HIGH CONFIDENCE. A 052214Z AMSU 89 GHZ IMAGE DEPICTS TIGHTLY
CURVED CONVECTIVE BANDING WRAPPING INTO A WELL-DEFINED LOW-LEVEL
CIRCULATION CENTER. THE CURRENT INTENSITY IS ASSESSED AT 90 KNOTS
AND IS SUPPORTED BY AGENCY DVORAK VALUES OF T5.0 FROM PGTW AND KNES.
THE UPPER LEVEL ENVIRONMENT REMAINS FAVORABLE WITH DUAL CHANNEL
OUTFLOW AND MODERATE (15 TO 25 KNOTS) VERTICAL WIND SHEAR (VWS). TC
ZENA IS TRACKING WITHIN ENHANCED FLOW BETWEEN THE SUBTROPICAL RIDGE
AND A BROAD SHORTWAVE TROUGH. THIS SYSTEM IS FORECAST TO CONTINUE
TRACKING EAST-SOUTHEASTWARD AND THEN EASTWARD WITHIN THIS ENHANCED
WESTERLY FLOW THROUGHOUT THE FORECAST PERIOD. TC 18P WILL WEAKEN
RAPIDLY OVER THE NEXT 48 HOURS AS VWS BECOMES UNFAVORABLE. THE
SYSTEM IS FORECAST TO BEGIN SUBTROPICAL TRANSITION AT TAU 36 AND
COMPLETE SUBTROPICAL TRANSITION BY TAU 48, AS IT BECOMES FULLY
EMBEDDED WITHIN THE SUBTROPICAL TROUGH. DYNAMIC MODEL GUIDANCE IS IN
EXCELLENT AGREEMENT ON THE TRACK OF TC ZENA, LENDING TO HIGH
CONFIDENCE IN THE JTWC FORECAST TRACK. MAXIMUM SIGNIFICANT WAVE
HEIGHT AT 060000Z IS 22 FEET. NEXT WARNINGS AT 060900Z, 061500Z,
062100Z AND 070300Z.//
=========================================================================
WTPS31 PGTW 20160406 09:00z
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 18P (ZENA) WARNING NR 004//
RMKS/
1. TROPICAL CYCLONE 18P (ZENA) WARNING NR 004
   01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   060600Z --- NEAR 18.5S 175.1E
     MOVEMENT PAST SIX HOURS - 110 DEGREES AT 23 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 080 KT, GUSTS 100 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 064 KT WINDS - 015 NM NORTHEAST QUADRANT
                            015 NM SOUTHEAST QUADRANT
                            015 NM SOUTHWEST QUADRANT
                            015 NM NORTHWEST QUADRANT
   RADIUS OF 050 KT WINDS - 025 NM NORTHEAST QUADRANT
                            025 NM SOUTHEAST QUADRANT
                            025 NM SOUTHWEST QUADRANT
                            025 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            050 NM NORTHWEST QUADRANT
   REPEAT POSIT: 18.5S 175.1E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   061800Z --- 19.7S 179.8E
   MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 064 KT WINDS - 015 NM NORTHEAST QUADRANT
                            015 NM SOUTHEAST QUADRANT
                            015 NM SOUTHWEST QUADRANT
                            015 NM NORTHWEST QUADRANT
   RADIUS OF 050 KT WINDS - 025 NM NORTHEAST QUADRANT
                            025 NM SOUTHEAST QUADRANT
                            025 NM SOUTHWEST QUADRANT
                            025 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            050 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 105 DEG/ 25 KTS
    ---
   24 HRS, VALID AT:
   070600Z --- 20.9S 175.1W
   MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   BECOMING SUBTROPICAL
   RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
                            030 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            030 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 065 NM NORTHEAST QUADRANT
                            065 NM SOUTHEAST QUADRANT
                            045 NM SOUTHWEST QUADRANT
                            045 NM NORTHWEST QUADRANT
   VECTOR TO 36 HR POSIT: 100 DEG/ 24 KTS
    ---
   36 HRS, VALID AT:
   071800Z --- 21.7S 170.0W
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   BECOMING SUBTROPICAL
   RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
                            060 NM SOUTHEAST QUADRANT
                            045 NM SOUTHWEST QUADRANT
                            045 NM NORTHWEST QUADRANT
   VECTOR TO 48 HR POSIT: 105 DEG/ 25 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   080600Z --- 23.0S 164.7W
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   SUBTROPICAL
    ---
REMARKS:
060900Z POSITION NEAR 18.8S 176.3E.
TROPICAL CYCLONE (TC) 18P (ZENA), LOCATED APPROXIMATELY 190 NM WEST
OF SUVA, FIJI, HAS TRACKED EAST-SOUTHEASTWARD AT 23 KNOTS OVER THE
PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY INDICATES A
GENERAL WEAKENING TREND WITH DECAYING CORE CONVECTION AND THE LOSS
OF THE VISIBLE EYE FEATURE, THEREFORE, DVORAK INTENSITY ESTIMATES
HAVE DECREASED TO 4.5 (77 KNOTS). CONSEQUENTLY, THE INITIAL
INTENSITY IS NOW ASSESSED AT 80 KNOTS. UPPER-LEVEL ANALYSIS
INDICATES INCREASING WESTERLY VERTICAL WIND SHEAR (VWS) AT MODERATE
TO STRONG LEVELS (20 TO 30 KNOTS), HOWEVER, OUTFLOW HAS REMAINED
ROBUST. TC 18P IS TRACKING QUICKLY EAST-SOUTHEASTWARD UNDER ENHANCED
FLOW BETWEEN THE SUBTROPICAL RIDGE AND A BROAD TROUGH, AND IS
FORECAST TO CONTINUE TRACKING EAST-SOUTHEASTWARD THROUGH THE
FORECAST PERIOD. TC 18P IS FORECAST TO WEAKEN THROUGH THE FORECAST
PERIOD AS IT ENCOUNTERS INCREASING VWS ASSOCIATED WITH SUBTROPICAL
WESTERLY FLOW. THE SYSTEM IS FORECAST TO TRANSITION TO A SUBTROPICAL
LOW BY TAU 48, HOWEVER, TC 18P MAY WEAKEN BELOW 35 KNOTS AFTER TAU
36. DYNAMIC MODEL GUIDANCE IS IN GOOD AGREEMENT OVERALL, THEREFORE
THERE IS HIGH CONFIDENCE IN THE OFFICIAL FORECAST. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 060600Z IS 22 FEET. NEXT WARNINGS AT
061500Z, 062100Z, 070300Z AND 070900Z.//
=========================================================================
WTPS31 PGTW 20160406 15:00z
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 18P (ZENA) WARNING NR 005//
RMKS/
1. TROPICAL CYCLONE 18P (ZENA) WARNING NR 005
   01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   061200Z --- NEAR 19.4S 177.4E
     MOVEMENT PAST SIX HOURS - 115 DEGREES AT 24 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 050 KT WINDS - 025 NM NORTHEAST QUADRANT
                            025 NM SOUTHEAST QUADRANT
                            025 NM SOUTHWEST QUADRANT
                            025 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
                            050 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            040 NM NORTHWEST QUADRANT
   REPEAT POSIT: 19.4S 177.4E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   070000Z --- 20.5S 177.7W
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   BECOMING SUBTROPICAL
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
                            050 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            040 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 105 DEG/ 24 KTS
    ---
   24 HRS, VALID AT:
   071200Z --- 21.5S 172.6W
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   BECOMING SUBTROPICAL
   VECTOR TO 36 HR POSIT: 105 DEG/ 25 KTS
    ---
   36 HRS, VALID AT:
   080000Z --- 22.6S 167.4W
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   SUBTROPICAL
    ---
REMARKS:
061500Z POSITION NEAR 19.7S 178.6E.
TROPICAL CYCLONE (TC) 18P (ZENA), LOCATED APPROXIMATELY 96 NM
SOUTHWEST OF SUVA, FIJI, HAS TRACKED EAST-SOUTHEASTWARD AT 24 KNOTS
OVER THE PAST SIX HOURS. ANIMATED INFRARED SATELLITE IMAGERY
INDICATES A RAPIDLY WEAKENING SYSTEM WITH DECAYING DEEP CONVECTION
SHEARED EAST OF THE CENTER. DVORAK INTENSITY ESTIMATES HAVE
DECREASED TO 4.0 (65 KNOTS) AND THE INITIAL INTENSITY IS NOW
ASSESSED AT 65 KNOTS. UPPER-LEVEL ANALYSIS INDICATES INCREASING
WESTERLY VERTICAL WIND SHEAR (VWS) AT STRONG LEVELS (30 TO 40 KNOTS)
PARTIALLY OFFSET BY ROBUST POLEWARD OUTFLOW. TC 18P IS TRACKING
QUICKLY EAST-SOUTHEASTWARD UNDER ENHANCED FLOW BETWEEN THE
SUBTROPICAL RIDGE AND A BROAD TROUGH, AND IS FORECAST TO CONTINUE
TRACKING EAST-SOUTHEASTWARD THROUGH THE FORECAST PERIOD. TC 18P IS
FORECAST TO WEAKEN THROUGH THE FORECAST PERIOD AS IT ENCOUNTERS
INCREASING VWS ASSOCIATED WITH SUBTROPICAL WESTERLY FLOW. THE SYSTEM
IS FORECAST TO TRANSITION TO A SUBTROPICAL LOW BY TAU 36, HOWEVER,
TC 18P MAY WEAKEN BELOW 35 KNOTS AFTER TAU 24. DYNAMIC MODEL
GUIDANCE IS IN GOOD AGREEMENT OVERALL, THEREFORE THERE IS HIGH
CONFIDENCE IN THE OFFICIAL FORECAST. MAXIMUM SIGNIFICANT WAVE HEIGHT
AT 061200Z IS 20 FEET. NEXT WARNINGS AT 062100Z, 070300Z, 070900Z
AND 071500Z.//
=========================================================================
WTPS31 PGTW 20160406 21:00z
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 18P (ZENA) WARNING NR 006//
RMKS/
1. TROPICAL CYCLONE 18P (ZENA) WARNING NR 006
   01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   061800Z --- NEAR 20.5S 178.7W
     MOVEMENT PAST SIX HOURS - 105 DEGREES AT 31 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 050 KT WINDS - 025 NM NORTHEAST QUADRANT
                            025 NM SOUTHEAST QUADRANT
                            025 NM SOUTHWEST QUADRANT
                            025 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
                            050 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            040 NM NORTHWEST QUADRANT
   REPEAT POSIT: 20.5S 178.7W
    ---
   FORECASTS:
   12 HRS, VALID AT:
   070600Z --- 21.7S 172.9W
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   RADIUS OF 034 KT WINDS - 065 NM NORTHEAST QUADRANT
                            065 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            040 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 100 DEG/ 28 KTS
    ---
   24 HRS, VALID AT:
   071800Z --- 22.7S 166.9W
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
062100Z POSITION NEAR 20.8S 177.2W.
TROPICAL CYCLONE 18P (ZENA), LOCATED APPROXIMATELY 218 NM
SOUTHEAST OF SUVA, FIJI, HAS TRACKED EAST-SOUTHEASTWARD AT 31
KNOTS OVER THE PAST SIX HOURS. ANIMATED INFRARED SATELLITE IMAGERY
INDICATES THAT TC ZENA (18P) CONTINUES TO RAPIDLY WEAKEN. A 1759Z
91GHZ MICROWAVE IMAGE SHOWS THAT THE DEEP CONVECTION IS SHEARED EAST
OF A WEAK LOW LEVEL CIRCULATION CENTER (LLCC) WITH NO CONVECTIVE
BANDING EVIDENT. INITIAL INTENSITY IS ASSESSED AT 55 KNOTS BASED ON
DVORAK DT ESTIMATES OF 3.5 FROM BOTH PGTW AND KNES. UPPER-LEVEL
ANALYSIS INDICATES TC ZENA IS CURRENTLY IN AN AREA OF HIGH (40-50
KNOTS) NORTHWESTERLY ENVIRONMENTAL VERTICAL WIND SHEAR (VWS).
HOWEVER, AS THE STORM MOTION VECTOR IS ALIGNED WITH THE SHEAR
VECTOR, THE EFFECTIVE SHEAR VALUE IS LOWER AT AROUND 20-25 KNOTS.
THE LOWER EFFECTIVE VWS VALUE IS ALLOWING TC ZENA TO MAINTAIN
INTENSITY FOR LONGER THAN WOULD OTHERWISE BE EXPECTED IN SUCH AN
ENVIRONMENT. TC ZENA IS TRACKING RAPIDLY EAST-SOUTHEASTWARD UNDER
THE ENHANCED FLOW BETWEEN THE SUBTROPICAL RIDGE (STR) TO THE NORTH
AND A BROAD TROUGH TO THE SOUTHWEST AND IS FORECAST TO CONTINUE THIS
TRACK MOTION THROUGH THE FORECAST PERIOD. THE SYSTEM WILL CONTINUE
TO WEAKEN AS IT ENCOUNTERS STEADILY INCREASING VWS ASSOCIATED WITH
MID-LATITUDE WESTERLY FLOW AND WILL DISSIPATE OVER WATER BY TAU 24.
WHILE DISSIPATING, TC ZENA WILL SIMULTANEOUSLY UNDERGO TRANSITION TO
A SUBTROPICAL LOW BUT WILL COMPLETE DISSIPATION FIRST, BEFORE
COMPLETING SUBTROPICAL TRANSITION. DYNAMIC MODEL GUIDANCE IS IN GOOD
AGREEMENT OVERALL, THEREFORE THERE IS HIGH CONFIDENCE IN THE
OFFICIAL FORECAST. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 061800Z IS 18
FEET. NEXT WARNINGS AT 070300Z, 070900Z AND 071500Z.//
=========================================================================
WTPS31 PGTW 20160407 03:00z
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL CYCLONE 18P (ZENA) WARNING NR 007
   01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   070000Z --- NEAR 21.5S 176.0W
     MOVEMENT PAST SIX HOURS - 110 DEGREES AT 27 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
                            050 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            040 NM NORTHWEST QUADRANT
   REPEAT POSIT: 21.5S 176.0W
    ---
   FORECASTS:
   12 HRS, VALID AT:
   071200Z --- 22.2S 170.7W
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   RADIUS OF 034 KT WINDS - 065 NM NORTHEAST QUADRANT
                            065 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            040 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 100 DEG/ 20 KTS
    ---
   24 HRS, VALID AT:
   080000Z --- 22.7S 166.3W
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
070300Z POSITION NEAR 21.7S 174.7W.
TROPICAL CYCLONE (TC) 18P (ZENA), LOCATED APPROXIMATELY 56 NM WEST-
SOUTHWEST OF TONGA, HAS TRACKED EAST-SOUTHEASTWARD AT 27 KNOTS
OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY
DEPICTS A DETERIORATING CONVECTIVE STRUCTURE PARTIALLY OBSCURING A
POORLY DEFINED LOW LEVEL CIRCULATION CENTER (LLCC) WHICH LEADS TO
LOW CONFIDENCE IN THE CURRENT POSITION. THE INITIAL INTENSITY HAS
BEEN LOWERED TO 50 KNOTS BASED ON DECREASING DVORAK INTENSITY
ESTIMATES FROM ALL AGENCIES AND SUPPORTS THE CURRENT STATE OF THE
CYCLONE. THE SYSTEM IS TRACKING IN A POOR ENVIRONMENT WITH 40 TO 50
KNOT NORTHWESTERLY VERTICAL WIND SHEAR (VWS) EASILY OFFSETTING THE
STRONG POLEWARD OUTFLOW INTO THE MID-LATITUDE WESTERLIES. HOWEVER,
THE SYSTEM IS MOVING IN-PHASE WITH THE VWS KEEPING THE LLCC
PARTIALLY UNDER THE CONVECTION. TC ZENA IS TRACKING RAPIDLY
SOUTHEASTWARD UNDER THE INFLUENCE OF THE COMBINED EFFECTS OF A SUB-
TROPICAL RIDGE TO THE NORTHEAST AND A MID-LATITUDE TROUGH TO THE
WEST. TC 18P WILL CONTINUE ON THIS COURSE AND FULLY DISSIPATE OVER
THE NEXT 24 HOURS DUE TO THE EFFECTS OF THE HIGH VWS. DYNAMIC MODEL
GUIDANCE REMAINS IN TIGHT AGREEMENT, LENDING HIGH CONFIDENCE TO THE
JTWC TRACK FORECAST. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 070000Z IS
15 FEET. NEXT WARNINGS AT 070900Z, 071500Z AND 072100Z.//
=========================================================================
WTPS31 PGTW 20160407 09:00z
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 18P (ZENA) WARNING NR 008//
RMKS/
1. TROPICAL CYCLONE 18P (ZENA) WARNING NR 008
   01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   070600Z --- NEAR 22.1S 173.4W
     MOVEMENT PAST SIX HOURS - 105 DEGREES AT 25 KTS
     POSITION ACCURATE TO WITHIN 025 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
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   REPEAT POSIT: 22.1S 173.4W
    ---
   FORECASTS:
   12 HRS, VALID AT:
   071800Z --- 22.7S 168.3W
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
070900Z POSITION NEAR 22.3S 172.1W.
TROPICAL CYCLONE (TC) 18P (ZENA), LOCATED APPROXIMATELY 108 NM EAST-
SOUTHEAST OF TONGA, HAS TRACKED EAST-SOUTHEASTWARD AT 25 KNOTS OVER
THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY
SHOWS THE MAIN CONVECTION HAS SIGNIFICANTLY ERODED AND HAS DECOUPLED
FROM AN UNRAVELING LOW LEVEL CIRCULATION. THE INITIAL POSITION IS
EXTRAPOLATED FROM A 070341Z SSMI-S MICROWAVE PASS WITH FAIR
CONFIDENCE. THE INITIAL INTENSITY IS BASED ON AN OVERALL ASSESSMENT
OF SUBJECTIVE AND OBJECTIVE DVORAK ESTIMATES AND IS SUPPORTED BY A
070206Z RAPIDSCAT PASS. ENVIRONMENTAL ANALYSIS INDICATES THE SYSTEM
HAS DRIFTED INTO AN AREA OF STRONG (30-40 KNOT) VERTICAL WIND SHEAR
AND COOLER SEA SURFACE TEMPERATURES (26 CELSIUS). THESE CONDITIONS
ARE EXPECTED TO WORSEN AND CAUSE FURTHER DECAY TO TC 18P. THIS IS THE
FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WRNCEN PEARL HARBOR
HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 070600Z IS 12 FEET.

Tropical cyclone tracks developed by Michael Bath using operational warnings and advisories.


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Document: tropical_cyclone_zena_jtwc_advisories.htm Updated: 2 May 2017