Tropical Cyclone Technical Bulletin: AUSTRALIA - Western Australia Issued by Australian Government Bureau of Meteorology TROPICAL CYCLONE WARNING CENTRE at: 1318 UTC 04/03/2026 Name: Tropical Low Identifier: 28U Data At: 1200 UTC Latitude: 11.4S Longitude: 109.9E Location Accuracy: within 25nm (45 km) Movement Towards: east northeast (059 deg) Speed of Movement: 6 knots (11 km/h) Maximum 10-Minute Wind: 35 knots (65 km/h) Maximum 3-Second Wind Gust: 50 knots (95 km/h) Central Pressure: 997 hPa Radius of 34-knot winds NE quadrant: 60 nm (110 km) Radius of 34-knot winds SE quadrant: Radius of 34-knot winds SW quadrant: None nm (110 km) Radius of 34-knot winds NW quadrant: 60 nm (110 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: Radius of Maximum Winds: Dvorak Intensity Code: T2.0/2.0/D1.0/24HRS STT:S0.0/06HRS Pressure of outermost isobar: 1006 hPa Radius of outermost closed isobar: 90 nm (165 km) FORECAST DATA Date/Time : Location : Loc. Accuracy: Max Wind : Central Pressure (UTC) : degrees : nm (km): knots(km/h): hPa +06: 04/1800: 11.3S 111.4E: 035 (070): 040 (075): 997 +12: 05/0000: 11.1S 113.1E: 045 (085): 045 (085): 995 +18: 05/0600: 11.2S 115.5E: 055 (100): 045 (085): 996 +24: 05/1200: 11.9S 118.0E: 060 (110): 045 (085): 996 +36: 06/0000: 14.2S 121.1E: 075 (140): 035 (065): 1000 +48: 06/1200: 15.5S 121.4E: 085 (160): 030 (055): 1001 +60: 07/0000: 16.4S 120.5E: 100 (185): 030 (055): 1000 +72: 07/1200: 16.8S 119.4E: 145 (265): 030 (055): 1001 +96: 08/1200: None None: None (None): None (None): None +120: 09/1200: None None: None (None): None (None): None REMARKS: Tropical Low 28U has struggled to develop over the last 6 hours due to high easterly wind shear, with any deep convection remaining east of the system centre. A SAR pass at 1105 UTC gives good confidence in position and wind structure. The Dvorak cloud pattern with curved band wrap of 0.3 gives a DT = 2.0. FT/CI = 2.0. MET agrees with a D trend over last 24 hours. The RCM2 Synthetic Aperture Radar (SAR) pass at 1105 UTC showed the strongest winds are confined on the northern side of the system. Objective guidance remains limited, with ADT shear pattern of 2 to 2.5 over last 3 hours and DPRINT of 31 kts at 1200 UTC (1-min mean). Intensity maintained at 35 knots. Wind shear remains at over 30 knots from strong easterly winds aloft, but high SSTs (28-29C), strong low level forcing and high moisture have maintained deep convection on the western side of the low level centre. The lack of development in the last 6 hours has reduced the risk of a tropical cyclone developing tonight, and it is now only a moderate chance tomorrow. Wind shear will likely remain high into Thursday, with further deterioration of conditions by Friday. However, with the rapid movement and enhanced monsoonal flow to the north, gales are likely to persist to the north then northeast of the system until sometime Friday. Motion is to the east due to the monsoonal westerly steering flow, and then around the much larger tropical low 30U. The Fujiwhara Effect may affect the motion of 28U but there remains high confidence in this track until at least the weekend. On Saturday, some guidance maintains a discrete low or a vorticity max embedded in the broader circulation of 30U, that moves west southwest offshore from the Pilbara coast, with a small possibility of a small area of gales to the south of the centre. Copyright Commonwealth of Australia == The next bulletin for this system will be issued by: 04/1930 UTC.