SIO: Post-Tropical (was INVEST 99S)

[Digital-TC-Chaser]

99S INVEST 170319 1800 13.8S 120.9E SHEM 15 1010

[Digital-TC-Chaser]

ABIO10 PGTW 201800
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN
/OCEAN/201800Z-211800ZMAR2017//
RMKS/
1. NORTH INDIAN OCEAN AREA (MALAY PENINSULA WEST TO COAST OF
AFRICA):
A. TROPICAL CYCLONE SUMMARY: NONE.
B. TROPICAL DISTURBANCE SUMMARY: NONE.
2. SOUTH INDIAN OCEAN AREA (135E WEST TO COAST OF AFRICA):
A. TROPICAL CYCLONE SUMMARY: NONE.
B. TROPICAL DISTURBANCE SUMMARY:
(1) THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 13.0S
118.7E, IS NOW LOCATED NEAR 13.2S 117.8E, APPROXIMATELY 250 NM
NORTH OF ROWLEY SHOALS, AUSTRALIA. ANIMATED INFRARED SATELLITE
IMAGERY DEPICTS FLARING DEEP CONVECTION, WITH FORMATIVE BANDING OVER
THE SOUTHERN SEMI-CIRCLE OF A BROAD LOW-LEVEL CIRCULATION CENTER
(LLCC). A 201408Z MHS METOP-A 89GHZ DISPLAYS FORMATIVE CURVED
BANDING WRAPPING AROUND THE PERIPHERY OF THE LLCC. UPPER-LEVEL
ANALYSIS SHOWS A MODERATELY FAVORABLE ENVIRONMENT WITH LOW VERTICAL
WIND SHEAR AND FAIR DIFFLUENCE ALOFT. GLOBAL MODELS INDICATE SYSTEM
WILL TRACK SOUTHWESTWARD THEN SHARPLY SOUTHWARD TOWARD NORTHWEST
AUSTRALIA. GRADUAL STRENGTHENING IS EXPECTED BEFORE MAKING LANDFALL.
MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS.
MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1004 MB. THE
POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE
WITHIN THE NEXT 24 HOURS REMAINS LOW.
(2) NO OTHER SUSPECT AREAS.//

[wxman57]

It's a depression now, according to BoM: