AXAU02 APRF 290107
IDW27700
TROPICAL CYCLONE TECHNICAL BULLETIN: AUSTRALIA - WESTERN REGION
ISSUED BY AUSTRALIAN BUREAU OF METEOROLOGY TROPICAL CYCLONE WARNING
CENTRE
AT: 0107 UTC 29/03/2025
NAME: EX-TROPICAL CYCLONE DIANNE
IDENTIFIER: 28U
DATA AT: 0000 UTC
LATITUDE: 17.1S
LONGITUDE: 123.9E
LOCATION ACCURACY: WITHIN 25NM (45 KM)
MOVEMENT TOWARDS: SOUTH (176 DEG)
SPEED OF MOVEMENT: 7 KNOTS (13 KM/H)
MAXIMUM 10-MINUTE WIND: 35 KNOTS (65 KM/H)
MAXIMUM 3-SECOND WIND GUST: 50 KNOTS (95 KM/H)
CENTRAL PRESSURE: 993 HPA
RADIUS OF 34-KNOT WINDS NE QUADRANT:
RADIUS OF 34-KNOT WINDS SE QUADRANT:
RADIUS OF 34-KNOT WINDS SW QUADRANT:
RADIUS OF 34-KNOT WINDS NW QUADRANT: 30 NM (55 KM)
RADIUS OF 48-KNOT WINDS NE QUADRANT:
RADIUS OF 48-KNOT WINDS SE QUADRANT:
RADIUS OF 48-KNOT WINDS SW QUADRANT:
RADIUS OF 48-KNOT WINDS NW QUADRANT:
RADIUS OF 64-KNOT WINDS:   NM (  KM)
RADIUS OF MAXIMUM WINDS:   NM (  KM)
DVORAK INTENSITY CODE:
PRESSURE OF OUTERMOST ISOBAR: 1000 HPA
RADIUS OF OUTERMOST CLOSED ISOBAR: 60 NM (110 KM)
FORECAST DATA
DATE/TIME    : LOCATION    : LOC. ACCURACY: MAX WIND   : CENTRAL
PRESSURE
(UTC)        : DEGREES     :      NM  (KM): KNOTS(KM/H): HPA
+06:  29/0600: 17.9S 123.9E:     035 (070):  035  (065):  992
+12:  29/1200: 18.6S 123.9E:     045 (085):  035  (065):  992
+18:  29/1800: 19.1S 123.9E:     055 (100):  030  (055):  993
+24:  30/0000: 19.5S 123.9E:     060 (110):  030  (055):  995
+36:  30/1200: 20.0S 124.6E:     080 (145):  025  (045):  998
+48:  31/0000:             :              :            :
+60:  31/1200:             :              :            :
+72:  01/0000:             :              :            :
+96:  02/0000:             :              :            :
+120: 03/0000:             :              :            :
REMARKS:
EX-TROPICAL CYCLONE DIANNE IS MOVING INLAND AND WEAKENING.

POSITION IS BASED ON SURFACE OBSERVATIONS AT DERBY AND BROOME RADAR
WITH GOOD
CONFIDENCE.

THE SYSTEM IS OVER LAND SO DVORAK NO LONGER APPLICABLE. ONLY CURRENT
OBJECTIVE
AID IS DPRINT 49 KT (1-MIN MEAN). INTENSITY SET AT 35 KT BASED ON
SURFACE
OBSERVATIONS, WITH GALES CONFINED TO THE NW QUADRANT.

THE SYSTEM IS NOW MOVING OVER LAND, THOUGH ENVIRONMENTAL CONDITIONS
ARE
OTHERWISE FAVOURABLE. IT IS EXPECTED TO WEAKEN AND LOSE SUSTAINED
SURFACE GALES
LATER TODAY, HOWEVER STRONGER WINDS MAY PERSIST ALOFT AS IT PUSHES
FURTHER
INLAND DURING THE DAY. RISK OF DAMAGING GUSTS MAY OCCUR, ESPECIALLY
ON THE
SOUTHERN SIDE DURING THE DAY DUE TO VERTICAL MIXING.

THE SYSTEM MOTION IS EXPECTED TO CONTINUE SOUTH SOUTHEAST TAKING IT
FURTHER
INLAND,  COINCIDING WITH THE PASSAGE OF A MID-LATITUDE TROUGH TO THE
SOUTHEAST,
AND A STRENGTHENING OF THE RIDGE TO THE EAST.

COPYRIGHT COMMONWEALTH OF AUSTRALIA
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