TROPICAL CYCLONE ADVISORY NUMBER 4 FOR TONGA ON TROPICAL DEPRESSION 11F
ISSUED FROM THE FUA’AMOTU TROPICAL CYCLONE WARNING CENTRE AT 10:00PM MONDAY 25 FEBRUARY 2019
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TROPICAL CYCLONE WARNING REMAINS INFORCE FOR TONGA.
WARNINGS:
A GALE WARNING REMAIN INFORCE FOR THE NIUAS AND VAVA’U LAND AREAS AND COASTAL WATERS.
A GALE ALERT REMAIN INFORCE FOR HA’APAI, TONGATAPU AND ‘EUA LAND AREAS AND COASTAL WATERS.
A HEAVY RAIN WARNING AND FLASH FLOOD ADVISORIES REMAIN INFORCE FOR THE NIUAS AND VAVA’U.
A HEAVY DAMAGING SWELL REMAIN INFORCE FOR THE NIUAS AND VAVA’U COASTAL WATERS.
SITUATION:
TROPICAL DEPRESSION TD11F WAS LOCATED NEAR LATITUDE 13.5 SOUTH, LONGITUDE 174.8 WEST OR 240KM NORTH NORTHEAST OF NIUAFO’OU OR 290KM NORTH NORTH-WEST OF NIUATOPUTAPU AT 09:00PM THIS EVENING. THIS SYSTEM IS GRADUALLY MOVING SOUTH SOUTHEAST AT THE SPEED OF 10 KNOTS (18KM/HR). THE POTENTIAL FOR THE SYSTEM TO DEVELOP INTO A TROPICAL CYCLONE IS MODERATE TO HIGH IN THE NEXT 24 HOURS. THE MAXIMUM WINDS NEAR THE CENTER IS ABOUT 25 KNOTS (46 KM/HR) WITH MOMENTARY GUST UP TO 35-40 KNOTS (64-74KM/HR). ON ITS CURRENT TRACK, TD11F IS EXPECTED TO LIE AT ABOUT 135KM EAST NORTHEAST OF NIUAFO’OU OR 145KM NORTHWEST OF NIUATOPUTAPU OR 420KM NORTH OF VAVA’U AT 08:00AM TOMORROW MORNING. A HEAVY RAIN AND STRONG TO GALE FORCE WINDS MAY AFFECT THE NIUAS AND VAVA’U.
FOR THE NIUAS:
EAST TO SOUTHEAST WINDS 15-20 KNOTS (27-37KM/HR). TENDING NORTH TO NORTHEAST WINDS 25-30 KNOTS (46-55KM/HR) WITH MOMENTARY GUST UP TO 35-40 KNOTS (64-74KM/HR) TOMORROW MORNING. MOSTLY CLOUDY AND OVERCAST WITH OCCASIONAL RAIN, HEAVY AT TIMES WITH ISOLATED THUNDERSTORMS. MODERATE SEAS BECOMING ROUGH SEAS TOMORROW. A HEAVY DAMAGING NORTHERLY SWELL DEVELOPING TOMORROW.
POSSIBLE FLASH FLOOD AND SEA FLOODING IN LOW LYING AREAS DUE TO HEAVY RAIN AND HEAVY DAMAGING SWELL.
FOR VAVA’U:
EAST TO SOUTHEAST WINDS 15-20 KNOTS (27-37KM/HR). TENDING NORTH TO NORTHEAST WINDS 25-30 KNOTS (46-55KM/HR) WITH MOMENTARY GUST UP TO 35-40 KNOTS (64-74KM/HR) TOMORROW EVENING. MOSTLY CLOUDY AND OVERCAST WITH OCCASIONAL RAIN, HEAVY AT TIMES WITH ISOLATED THUNDERSTORMS. MODERATE SEAS BECOMING ROUGH SEAS TOMORROW EVENING. A HEAVY DAMAGING NORTHERLY SWELL DEVELOPING TOMORROW EVENING.
POSSIBLE FLASH FLOOD AND SEA FLOODING IN LOW LYING AREAS DUE TO HEAVY RAIN AND HEAVY DAMAGING SWELL.
FOR HA’APAI, TONGATAPU AND ‘EUA:
EAST TO SOUTHEAST WINDS 10-15 KNOTS (18-27KM/HR), TENDING NORTH TO NORTHEAST WINDS EARLY MORNING WEDNESDAY, 20-25 KNOTS (37-47KM/HR) RISING UP TO 30 KNOTS (55KM/HR) AT TIMES.
MAINLY FINE APART FROM CLOUDY PERIODS WITH POSSIBLE OCCASSIONAL SHOWERS.
MODERATE TO ROUGH SEAS. A HEAVY DAMAGING SOUTHEASTERLY SWELL.
POSSIBLE FLASH FLOOD AND SEA FLOODING IN LOW LYING AREAS.
TIDE PREDICTION
HIGH TIDE : 12:50AM
LOW TIDE : 06:55AM
THE MEAN SEA LEVEL PRESSURE RECORDED AT FUA’AMOTU AIRPORT AT 10:00PM WAS 1009.7 MILLIBARS AND THE RELATIVE HUMIDITY WAS 92%.
THE NEXT TROPICAL CYCLONE ADVISORY ON TROPICAL DEPRESSION 11F FOR TONGA WILL BE ISSUED AT ABOUT 01:00AM TONIGHT.
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FCD: MT/GV/VV/FH/STT= CRS: FL/=