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Tropical Cyclone MONA : JTWC Advisories
Season 1999-2000 Summaries (Operational Data): [AU] [SIO] [SPAC] [SH]
---> Tropical Cyclone MONA Track Map and Data

WTPS 22 PHNC 20000308 00:00z
RMKS/1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE 
WITHIN 100 NM EITHER SIDE OF A LINE FROM 19.1S1 174.5W7 TO 22.4S8
176.9W3 WITHIN THE NEXT 00 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 30 TO 35 KNOTS.
METSAT IMAGERY AT 072030Z2 INDICATES THAT A CIRCULATION CENTER IS
LOCATED NEAR 19.2S2 174.5W7. THE SYSTEM IS MOVING SOUTHWESTWARD
AT 10 KNOTS. THE NEXT SATELLITE INVESTIGATION IS SCHEDULED FOR
081800Z7.
2. REMARKS: LATEST MICROWAVE IMAGERY 072030Z INDICATES A WELL 
DEFINED LOW LEVEL CIRCULATION AND OUTFLOW IS GOOD. SYSTEM WILL
CONTINUE TO BE MONITORED FOR FURTHER DEVELOPMENT.
3. THIS ALERT VALID UNTIL 090000Z9.//
=========================================================================
WTPS 32 PHNC 20000308 03:00z    
1. TROPICAL CYCLONE 19P WARNING NR 001    
   04 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   080000Z8 --- NEAR 19.5S5 175.2W5
     MOVEMENT PAST SIX HOURS - 230 DEGREES AT 14 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
   RADIUS OF 035 KT WINDS - 065 NM SOUTHEAST SEMICIRCLE  
                            055 NM NORTHWEST SEMICIRCLE  
   REPEAT POSIT: 19.5S5 175.2W5
    ---
   FORECASTS:
   12 HRS, VALID AT:
   081200Z1 --- 20.9S1 176.0W4
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   RADIUS OF 035 KT WINDS - 075 NM SOUTHEAST SEMICIRCLE  
                            060 NM NORTHWEST SEMICIRCLE  
   VECTOR TO 24 HR POSIT: 175 DEG/ 09 KTS
    ---
   24 HRS, VALID AT:
   090000Z9 --- 22.6S0 175.8W1
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   RADIUS OF 035 KT WINDS - 085 NM SOUTHEAST SEMICIRCLE  
                            070 NM NORTHWEST SEMICIRCLE  
   VECTOR TO 36 HR POSIT: 170 DEG/ 09 KTS
    ---
   36 HRS, VALID AT:
   091200Z2 --- 24.3S9 175.5W8
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   RADIUS OF 050 KT WINDS - 015 NM 
   RADIUS OF 035 KT WINDS - 090 NM SOUTHEAST SEMICIRCLE  
                            075 NM NORTHWEST SEMICIRCLE  
   VECTOR TO 48 HR POSIT: 160 DEG/ 13 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   100000Z1 --- 26.7S5 174.6W8
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   BECOMING EXTRATROPICAL
   RADIUS OF 035 KT WINDS - 085 NM SOUTHEAST SEMICIRCLE  
                            070 NM NORTHWEST SEMICIRCLE  
    ---
REMARKS: TROPICAL CYCLONE (TC) 19P HAS TRACKED SOUTHWESTWARD
OVER THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 072330Z5
VISIBLE AND INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS
BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 35 KNOTS.  
SATELLITE ANIMATION CONTINUES TO SHOW IMPROVED LOW-LEVEL 
ORGANIZATION WITH OUTFLOW REMAINING GOOD IN ALL QUADRANTS. MODELS 
REMAIN IN GOOD AGREEMENT THROUGH THE 36 HOUR FORECAST PERIOD. 
TC 19P IS FORECAST TO TRACK SOUTHWARD UNDER THE STEERING INFLUENCE
OF THE SUBTROPICAL RIDGE TO THE EAST. TC 19P IS FORECAST TO
INTENSIFY CLIMATOLOGICALLY OVER THE 36 HOUR FORECAST PERIOD. 
AFTER THAT, INCREASING VERTICAL SHEAR WILL SERVE TO BEGIN WEAKENING
THE SYSTEM. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 080000Z IS 10 FEET.
THIS WARNING SUPERSEDES AND CANCELS NAVPACMETOCCEN 072351Z MAR 00
TROPICAL CYCLONE FORMATION ALERT (WTPS22 PHNC 080000). REFER TO
TROPICAL CYCLONE 16S (NORMAN) WARNINGS (WTXS32 PGTW) FOR TWELVE-
HOURLY UPDATES. REFER TO TROPICAL CYCLONE 14P (STEVE) WARNINGS
(WTXS35 PGTW) FOR SIX-HOURLY UPDATES. REFER TO TROPICAL CYCLONE 
18P (LEO) WARNINGS (WTPS31 PHNC) FOR TWELVE-HOURLY UPDATES. NEXT 
WARNINGS AT 081500Z4 AND 090300Z2.//
=========================================================================
WTPS32 PHNC 20000308 15:00z
1. TROPICAL CYCLONE 19P WARNING NR 002
   04 ACTIVE TROPICAL CYCLONES IN SOUTHEASTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   081200Z1 --- NEAR 19.8S8 175.2W5
     MOVEMENT PAST SIX HOURS - 225 DEGREES AT 03 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   REPEAT POSIT: 19.8S8 175.2W5
    ---
   FORECASTS:
   12 HRS, VALID AT:
   090000Z9 --- 20.1S3 175.4W7
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   VECTOR TO 24 HR POSIT: 195 DEG/ 04 KTS
    ---
   24 HRS, VALID AT:
   091200Z2 --- 20.9S1 175.6W9
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   VECTOR TO 36 HR POSIT: 190 DEG/ 05 KTS
    ---
   36 HRS, VALID AT:
   100000Z1 --- 21.9S2 175.8W1
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   RADIUS OF 035 KT WINDS - 090 NM SOUTHEAST SEMICIRCLE
                            075 NM NORTHWEST SEMICIRCLE
   VECTOR TO 48 HR POSIT: 180 DEG/ 07 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   101200Z4 --- 23.3S8 175.9W2
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   RADIUS OF 035 KT WINDS - 085 NM SOUTHEAST SEMICIRCLE
                            070 NM NORTHWEST SEMICIRCLE
    ---
REMARKS:
TROPICAL CYCLONE (TC) 19P (MONA), LOCATED APPROXIMATELY 425 NM TO
THE EAST-SOUTHEAST OF FIJI, HAS TRACKED SOUTHWESTWARD AT 3 KNOTS
DURING THE LAST 6 HOURS. THE WARNING POSTION IS BASED ON 080530Z
INFRARED SATELLITE IMAGERY AND SYNOPTIC DATA. THE WARNING INTENSITY
IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 25 KNOTS AND
SYNOPTIC DATA OF 20 KNOTS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT
081200Z IS 10 FEET. REFER TO WWPN30 PHNC FOR ADDITIONAL SEA
HEIGHT INFORMATION. NEXT WARNINGS AT 090300Z2 AND 091500Z5.
=========================================================================
WTPS32 PHNC 20000308 21:00z
1. TROPICAL CYCLONE 19P(MONA) WARNING NR 003
03 ACTIVE TROPICAL CYCLONES IN SOUTHEASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
---
WARNING POSITION:
081800Z7 --- NEAR 20.8S0 175.8W1
MOVEMENT PAST SIX HOURS - 210 DEGREES AT 07 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
RADIUS OF 050 KT WINDS - 060 NM SOUTHWEST SEMICIRCLE

045 NM NORTHEAST SEMICIRCLE
RADIUS OF 035 KT WINDS - 100 NM SOUTHWEST SEMICIRCLE

075 NM NORTHEAST SEMICIRCLE
REPEAT POSIT: 20.8S0 175.8W1
---
FORECASTS:
12 HRS, VALID AT:
090600Z5 --- 22.3S7 176.5W9
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
RADIUS OF 050 KT WINDS - 080 NM SOUTH SEMICIRCLE

060 NM NORTH SEMICIRCLE
RADIUS OF 035 KT WINDS - 120 NM SOUTH SEMICIRCLE

080 NM NORTH SEMICIRCLE
VECTOR TO 24 HR POSIT: 185 DEG/ 10 KTS
---
24 HRS, VALID AT:
091800Z8 --- 24.3S9 176.7W1
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
RADIUS OF 050 KT WINDS - 060 NM SOUTHEAST SEMICIRCLE

045 NM NORTHWEST SEMICIRCLE
RADIUS OF 035 KT WINDS - 100 NM SOUTHEAST SEMICIRCLE

075 NM NORTHWEST SEMICIRCLE
VECTOR TO 36 HR POSIT: 185 DEG/ 12 KTS
---
36 HRS, VALID AT:
100600Z7 --- 26.6S4 177.0W5
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
RADIUS OF 050 KT WINDS - 050 NM SOUTHEAST SEMICIRCLE

035 NM NORTHWEST SEMICIRCLE
RADIUS OF 035 KT WINDS - 090 NM SOUTHEAST SEMICIRCLE

075 NM NORTHWEST SEMICIRCLE
VECTOR TO 48 HR POSIT: 195 DEG/ 14 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
101800Z0 --- 29.3S4 177.8W3
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
RADIUS OF 035 KT WINDS - 060 NM SOUTHEAST SEMICIRCLE

045 NM NORTHWEST SEMICIRCLE
---
REMARKS:
TROPICAL CYCLONE 19P (MONA) HAS TRACKED SOUTH-SOUTHWESTWARD
AT 07 KTS DURING THE PAST 6 HOURS. THE WARNING POSITION IS
BASED ON 081800Z7 INFRARED SATELLITE IMAGERY, SYNOPTIC DATA,
AND RADAR DATA. SYSTEM HAS SHOWN RAPID INTENSIFICATION THUS
INTENSITY HAS BEEN ADJUSTED TO 55 KTS. ANIMATED IMAGERY
VERIFIES THESE ESTIMATES WITH STRONG OUTFLOW EVIDENT IN
ALL QUADRANTS AND DEVELOPING CENTRAL DENSE OVERCAST (CDO).
TC 19P IS FORECAST TO TRACK SOUTH-SOUTHWEST THEN TRACK MORE
SOUTHWARD, DUE TO A WEAKENESS IN THE RIDGE TO ITS SOUTH. AS
THE SYSTEM TRACKS SOUTHWARD, GRADUAL WEAKENING IS FORECAST
DUE TO INCREASED SHEAR AND LOWERING SST=S. MAXIMUM SIGNIFICANT
WAVE HEIGHT AT 081800Z7 IS 26 FEET. 12 HOURLY FORECAST WARNING
TIMES FOR TC19P (MONA) HAVE BEEN CHANGED IN VIEW OF THIS RAPID
INTENSIFICATION.  NEXT WARNINGS WILL NOW BE VALID AT 090900Z8
AND 092100Z2. REFER TO TROPICAL CYCLONE 14P
(STEVE) WARNINGS (WTXS35 PGTW) FOR TWELVE-HOURLY UPDATES. REFER
TO TROPICALVCYCLONE 16S (NORMAN) WARNING (WTXS32 PGTW) FOR
TWELVE-HOURLY UPDATES. REFER TO TROPICAL CYCLONE 18P (LEO)
WARNINGS (WTPS31 PHNC) FOR TWELVE-HOURLY UPDATES.
=========================================================================
WTPS32 PHNC 20000309 09:00z
1. TROPICAL CYCLONE 19P (MONA) WARNING NR 004
01 ACTIVE TROPICAL CYCLONES IN SOUTHEASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
---
WARNING POSITION:
090600Z5 --- NEAR 21.4S7 175.9W2
MOVEMENT PAST SIX HOURS - 180 DEGREES AT 07 KTS
POSITION ACCURATE TO WITHIN 060 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT
RADIUS OF 050 KT WINDS - 060 NM SOUTH SEMICIRCLE

045 NM NORTH SEMICIRCLE
RADIUS OF 035 KT WINDS - 100 NM SOUTH SEMICIRCLE

075 NM NORTH SEMICIRCLE
REPEAT POSIT: 21.2S5 176.0W4
---
FORECASTS:
12 HRS, VALID AT:
091800Z8 --- 23.3S8 175.9W2
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
RADIUS OF 050 KT WINDS - 045 NM SOUTHEAST SEMICIRCLE

030 NM NORTHWEST SEMICIRCLE
RADIUS OF 035 KT WINDS - 080 NM SOUTHEAST SEMICIRCLE

060 NM NORTHWEST SEMICIRCLE
VECTOR TO 24 HR POSIT: 160 DEG/ 13 KTS
---
24 HRS, VALID AT:
100600Z7 --- 25.7S4 174.9W1
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
RADIUS OF 050 KT WINDS - 045 NM SOUTHEAST SEMICIRCLE

030 NM NORTHWEST SEMICIRCLE
RADIUS OF 035 KT WINDS - 080 NM SOUTHEAST SEMICIRCLE

060 NM NORTHWEST SEMICIRCLE
VECTOR TO 36 HR POSIT: 160 DEG/ 13 KTS
---
36 HRS, VALID AT:
101800Z0 --- 28.1S1 173.8W9
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
RADIUS OF 035 KT WINDS - 060 NM SOUTHEAST SEMICIRCLE

045 NM NORTHWEST SEMICIRCLE
VECTOR TO 48 HR POSIT: 160 DEG/ 15 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
110600Z8 --- 30.9S2 172.6W6
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
RADIUS OF 035 KT WINDS - 060 NM SOUTHEAST SEMICIRCLE

045 NM NORTHWEST SEMICIRCLE
---
REMARKS:
TROPICAL CYCLONE 19P (MONA) HAS TRACKED SOUTHWARD
AT 07 KNOTS OVER THE PAST 06 HOURS. THE WARNING POSITION IS BASED UPON
090530Z7 INFRARED AND VISIBLE SATELLITE IMAGERY. ANIMATED
SATELLITE IMAGERY SHOWS THAT TC 19P IS UNDER MODERATE NORTHWESTERLY
VERTICAL WIND SHEAR. HOWEVER, AN IRREGULAR CLOUD-FILLED EYE IS
ALSO EVIDENT. BASED ON A TROPICAL RAINFALL MEASURING MISSION PASS
AT 090530Z7, THERE IS A NEAR CONCENTRIC EYEWALL WITH DEEP CONVECTION
TO THE WEST. TC 19P IS EXPECTED TO TRACK SOUTH-SOUTHEASTWARD UNDER THE
STEERING INFLUENCE OF A MID TO UPPER LEVEL RIDGE TO THE EAST. TC 19P
SHOULD WEAKEN RAPIDLY AS IT ENCOUNTERS INCREASING VERTICAL WIND
SHEAR DUE TO AN APPROACHING MID-LATITIUDE TROUGH. MAXIMUM SIGNIFICANT
WAVE HEIGHT AT 090600Z5 IS 30 FEET. NEXT WARNINGS AT 092100Z2
AND 100900Z0.//
=========================================================================
WTPS32 PHNC 20000309 21:00z
1. TROPICAL CYCLONE 19P (MONA) WARNING NR 005
02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
---
WARNING POSITION:
091800Z8 --- NEAR 22.6S0 175.4W7
MOVEMENT PAST SIX HOURS - 135 DEGREES AT 05 KTS
POSITION ACCURATE TO WITHIN 060 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT
RADIUS OF 050 KT WINDS - 060 NM EAST SEMICIRCLE

045 NM WEST SEMICIRCLE
RADIUS OF 035 KT WINDS - 100 NM EAST SEMICIRCLE

075 NM WEST SEMICIRCLE
REPEAT POSIT: 22.6S0 175.4W7
---
FORECASTS:
12 HRS, VALID AT:
100600Z7 --- 23.6S1 174.5W7
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
RADIUS OF 050 KT WINDS - 040 NM EAST SEMICIRCLE

030 NM WEST SEMICIRCLE
RADIUS OF 035 KT WINDS - 090 NM EAST SEMICIRCLE

060 NM WEST SEMICIRCLE
VECTOR TO 24 HR POSIT: 145 DEG/ 10 KTS
---
24 HRS, VALID AT:
101800Z0 --- 25.2S9 173.3W4
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
RADIUS OF 050 KT WINDS - 020 NM SOUTHEAST SEMICIRCLE

010 NM NORTHWEST SEMICIRCLE
RADIUS OF 035 KT WINDS - 070 NM SOUTHEAST SEMICIRCLE

050 NM NORTHWEST SEMICIRCLE
VECTOR TO 36 HR POSIT: 175 DEG/ 10 KTS
---
36 HRS, VALID AT:
110600Z8 --- 27.1S0 173.2W3
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
RADIUS OF 035 KT WINDS - 060 NM SOUTHEAST SEMICIRCLE

045 NM NORTHWEST SEMICIRCLE
VECTOR TO 48 HR POSIT: 180 DEG/ 11 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
111800Z1 --- 29.3S4 173.3W4
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
RADIUS OF 035 KT WINDS - 050 NM SOUTHEAST SEMICIRCLE

035 NM NORTHWEST SEMICIRCLE
---
REMARKS:
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 091800Z8 IS 30 FEET. TROPICAL
CYCLONE 19P (MONA)HAS TRACKED SOUTHEASTWARD AT 05 KTS DURING THE PAST
6 HOURS. THE WARNING POSITION IS BASED ON 091800Z8 INFRARED AND
VISIBLE SATELLITE IMAGERY.  MOVEMENT OF TC 19P IS INFLUENCED BY A
MID-UPPERL LEVEL TROUGH TO ITS SOUTH. SATELLITE IMAGERY AT 092022Z5
INDICATES RE-FORMATION OF AN EYE WITH WARMING CLOUD TOPS. STRONG
OUTFLOW CONTINUES IN ALL QUADRANTS OF THE SYSTEM. NEXT WARNINGS AT
100900Z0 AND 102100Z4 REFER TO TROPICAL CYCLONE WARNING 14P (STEVE)
WARNINGS (WTXS35 PGTW) FOR TWELVE HOURLY UPDATES.//
=========================================================================
WTPS32 PHNC 20000310 09:00z
1. TROPICAL CYCLONE 19P (MONA) WARNING NR 006
02 ACTIVE TROPICAL CYCLONES IN SOUTHEASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
---
WARNING POSITION:
100600Z7 --- NEAR 24.3S9 173.3W4
MOVEMENT PAST SIX HOURS - 125 DEGREES AT 18 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
RADIUS OF 050 KT WINDS - 070 NM SOUTHEAST SEMICIRCLE

055 NM NORTHWEST SEMICIRCLE
RADIUS OF 035 KT WINDS - 110 NM SOUTHEAST SEMICIRCLE

095 NM NORTHWEST SEMICIRCLE
REPEAT POSIT: 24.3S9 173.3W4
---
FORECASTS:
12 HRS, VALID AT:
101800Z0 --- 27.5S4 171.7W6
MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT
RADIUS OF 050 KT WINDS - 050 NM SOUTHEAST SEMICIRCLE

035 NM NORTHWEST SEMICIRCLE
RADIUS OF 035 KT WINDS - 090 NM SOUTHEAST SEMICIRCLE

075 NM NORTHWEST SEMICIRCLE
VECTOR TO 24 HR POSIT: 155 DEG/ 20 KTS
---
24 HRS, VALID AT:
110600Z8 --- 31.1S5 169.8W4
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
RADIUS OF 050 KT WINDS - 030 NM SOUTHEAST SEMICIRCLE

015 NM NORTHWEST SEMICIRCLE
RADIUS OF 035 KT WINDS - 070 NM SOUTHEAST SEMICIRCLE

055 NM NORTHWEST SEMICIRCLE
VECTOR TO 36 HR POSIT: 155 DEG/ 22 KTS
---
36 HRS, VALID AT:
111800Z1 --- 35.1S9 167.4W8
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
BECOMING EXTRATROPICAL
RADIUS OF 035 KT WINDS - 050 NM SOUTHEAST SEMICIRCLE

035 NM NORTHWEST SEMICIRCLE
VECTOR TO 48 HR POSIT: 140 DEG/ 24 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
120600Z9 --- 38.6S7 163.4W4
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
BECOMING EXTRATROPICAL
RADIUS OF 035 KT WINDS - 050 NM SOUTHEAST SEMICIRCLE

035 NM NORTHWEST SEMICIRCLE
---
REMARKS:
TROPICAL CYCLONE 19P (MONA) HAS TRACKED SOUTHEASTWARD AT 18 KTS
DURING THE PAST SIX HOURS. THE WARNING POSITION IS BASED UPON
100530Z9 INFRARED AND VISIBLE SATELLITE IMAGERY. ANIMATED
SATELLITE IMAGERY SHOWS A PARTIALLY CLOUD-FILLED EYE AND
GOOD OUTFLOW IN ALL QUADRANTS. NORTHWESTERLY WIND SHEAR ASSOCIATED
WITH A MID TO UPPER LEVEL TROUGH IS ALSO EVIDENT. TC 19P IS
CONTINUES TO BE STEERED BY A MID TO UPPER LEVEL RIDGE TO THE
EAST-NORTHEAST. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 100600Z7 IS 30
FEET. NEXT WARNINGS AT 102100Z4 AND 110900Z1.//
=========================================================================
WTPS32 PHNC 20000310 21:00z
1. TROPICAL CYCLONE 19P (MONA) WARNING NR 007
   02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   101800Z0 --- NEAR 27.3S2 171.4W3
     MOVEMENT PAST SIX HOURS - 165 DEGREES AT 18 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   BECOMING EXTRATROPICAL
   RADIUS OF 035 KT WINDS - 090 NM NORTHEAST SEMICIRCLE
                            075 NM SOUTHWEST SEMICIRCLE
   REPEAT POSIT: 27.3S2 171.4W3
    ---
   FORECASTS:
   12 HRS, VALID AT:
   110600Z8 --- 30.7S0 171.6W5
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   BECOMING EXTRATROPICAL
   RADIUS OF 035 KT WINDS - 080 NM NORTHEAST SEMICIRCLE
                            055 NM SOUTHWEST SEMICIRCLE
   VECTOR TO 24 HR POSIT: 165 DEG/ 21 KTS
    ---
   24 HRS, VALID AT:
   111800Z1 --- 34.8S5 170.4W2
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   BECOMING EXTRATROPICAL
   VECTOR TO 36 HR POSIT: 150 DEG/ 22 KTS
    ---
   36 HRS, VALID AT:
   120600Z9 --- 38.6S7 167.4W8
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   EXTRATROPICAL
    ---
REMARKS: TROPICAL CYCLONE (TC) 19P (MONA) HAS TRACKED SOUTHWARD
AT 18 KTS DURING THE PAST 6 HOURS. THE WARNING POSITION IS BASED
UPON 101752Z6 INFRARED AND VISIBLE SATELLITE DATA. THE WARNING
INTENSITY IS BASED UPON CURRENT SATELLITE INTENSITY ESTIMATES 45
KTS. ANIMATED SATELLITE IMAGERY CONTINUES TO SHOW THE SYSTEMRAPIDLY
BECOMING AN EXTRA-TROPICAL LOW AS IT MOVES FURTHER INTO THE
PREVAILING WESTERLIES AND THE CONVECTION BECOMES SHEARED FROM
THE LOW-LEVEL CIRCULATION. TC 19P (MONA) IS FORECAST TO TRACK
SOUTHWARD IN THE FIRST 24 HOURS THEN SOUTHEASTERLY AS ITS MERGES
WITH AN APPROACHING FRONTAL BOUNDARY. THIS SYSTEM WILL CONTINUE TO
WEAKEN UNDER AN INCREASING SHEAR ENVIRONMENT. MAXIMUM SIGNIFICANT
WAVE HEIGHT AT 101800Z IS 24 FEET. REFER TO TROPICAL CYCLONE 14P
(STEVE) (WTXS35 PGTW) FOR THE FINAL WARNING. NEXT WARNINGS AT
110900 AND 112100.//
=========================================================================
WTPS 32 PHNC 20000311 09:00z    
1. TROPICAL CYCLONE 19P (MONA) WARNING NR 008    
   02 ACTIVE TROPICAL CYCLONES IN SOUTHEASTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   110600Z8 --- NEAR 28.2S2 171.9W8
     MOVEMENT PAST SIX HOURS - 175 DEGREES AT 12 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   BECOMING EXTRATROPICAL
   REPEAT POSIT: 28.2S2 171.9W8
    ---
   FORECASTS:
   12 HRS, VALID AT:
   111800Z1 --- 30.4S7 171.7W6
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   BECOMING EXTRATROPICAL
   VECTOR TO 24 HR POSIT: 155 DEG/ 13 KTS
    ---
   24 HRS, VALID AT:
   120600Z9 --- 32.8S3 170.5W3
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   EXTRATROPICAL
    ---
REMARKS:
TROPICAL CYCLONE MONA HAS TRACKED SOUTHWARD AT 12 KNOTS DURING
THE PAST 6 HOURS. THE WARNING POSITION IS BASED UPON 110552Z
INFRARED SATELLITE DATA. THE WARNING INTENSITY IS BASED UPON
CURRNET SATELLITE INTENSITY ESTIMATES OF 30 KNOTS. ANUMATED
SATELLITE IMAGERY CONTINUES TO SHOW THE SYSTEM IS BECOMING
EXTRA-TROPICAL AND THE CONVECTION IS COMPLETED SHEARED FROM THE
LOW LEVEL CIRCULATION. THE FORECAST TRACK IS FOR CONTINUED
MOVEMENT TO THE SOUTHEAST AND EXTRA-TROPICAL IN 24 HOURS. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 110600Z IS 16 FEET. REFER TO WWPN30
PHNC FOR ADDITIONAL SEA HEIGHT INFORMATION.
THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE NAVAL PACIFIC
METEOROLOGY AND OCEANOGRAPHY CENTER (NAVPACMETOCCEN).  THE SYSTEM
WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION.//

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


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Document: tropical_cyclone_mona_jtwc_advisories.htm Updated: 4 September 2016