Tropical Cyclone Technical Bulletin: AUSTRALIA - Western Australia Issued by Australian Government Bureau of Meteorology TROPICAL CYCLONE WARNING CENTRE at: 1839 UTC 26/03/2026 Name: Severe Tropical Cyclone Narelle Identifier: 34U Data At: 1800 UTC Latitude: 21.1S Longitude: 114.2E Location Accuracy: within 15nm (30 km) Movement Towards: southwest (216 deg) Speed of Movement: 10 knots (18 km/h) Maximum 10-Minute Wind: 100 knots (185 km/h) Maximum 3-Second Wind Gust: 140 knots (260 km/h) Central Pressure: 943 hPa Radius of 34-knot winds NE quadrant: 150 nm (280 km) Radius of 34-knot winds SE quadrant: 165 nm (305 km) Radius of 34-knot winds SW quadrant: 100 nm (205 km) Radius of 34-knot winds NW quadrant: 110 nm (205 km) Radius of 48-knot winds NE quadrant: 85 nm (155 km) Radius of 48-knot winds SE quadrant: 90 nm (165 km) Radius of 48-knot winds SW quadrant: 55 nm (100 km) Radius of 48-knot winds NW quadrant: 70 nm (130 km) Radius of 64-knot winds: 70 nm (70 km) Radius of Maximum Winds: 20 nm (40 km) Dvorak Intensity Code: T5.5/5.5/D0.5/24HRS STT:D0.5/06HRS Pressure of outermost isobar: 1006 hPa Radius of outermost closed isobar: 200 nm (370 km) FORECAST DATA Date/Time : Location : Loc. Accuracy: Max Wind : Central Pressure (UTC) : degrees : nm (km): knots(km/h): hPa +06: 27/0000: 22.6S 113.6E: 025 (050): 105 (195): 939 +12: 27/0600: 24.1S 113.7E: 035 (070): 080 (150): 962 +18: 27/1200: 25.8S 114.1E: 040 (075): 070 (130): 971 +24: 27/1800: 27.8S 115.0E: 045 (085): 055 (100): 983 +36: 28/0600: 32.2S 118.1E: 065 (125): 040 (075): 993 +48: 28/1800: None None: None (None): None (None): None +60: 29/0600: None None: None (None): None (None): None +72: 29/1800: None None: None (None): None (None): None +96: 30/1800: None None: None (None): None (None): None +120: 31/1800: None None: None (None): None (None): None REMARKS: Severe Tropical Cyclone Narelle is impacting the west Pilbara coast. Location was determined from Learmonth radar with very good confidence. Satellite imagery continues to show a large circular and clear eye. Deep convection near the centre has been pulsating over the last 6 hours, but the eye remains large with a diameter of about 40-45 nm. Dvorak analysis: Over the last 3 hours DT=5.5 using an eye pattern with a LG surrounding ring and no Eye adj made due to the large eye. MET is 6.0 based on a D trend. PAT adjusted to 5.5. FT/CI is 5.5 . Recent objective guidance at 1720 UTC: (1-min means): ADT 112 kn, AiDT 107 kn, DPRINT 106 kn, DMINT (1708UTC) 110 kn, SATCON (1700 UTC) 102 kn. Thevenard Island observed gusts to 88 kn around 1740UTC, with a mean 10 min mean up around 64kn at 1700 UTC. Intensity has increased to 100 knots (10-min), slightly higher than the subjective Dvorak and within error bounds of the objective estimates. Environmental conditions are generally favourable as Narelle approaches the North West Cape. SSTs around 29 30 C persist along Narelle s track off the Pilbara coast. Satellite image shows good upper outflow around the system, particularly on the poleward side. Deep layer wind shear is analysed around 10-15 knots easterly at 1500 UTC. Narelle may still intensify over the next 6 hours before interactions with the coast and there remains a slight risk it reaches category 5 intensity. As Narelle moves south today wind shear is forecast to increase and the system may begin to weaken as early as this morning as it also interactions with land. The weakening trend will continue during Friday as land interaction and the shear further increases. Despite this weakening the system is likely to impact the west coast of Western Australia as a severe tropical cyclone. Narelle is being starting to move to the south southwest with an approaching mid level trough in the Indian Ocean and a mid-level ridge over central Australia. The system will take a more southerly track today down the west coast and then south southeast across the South West Land Division during Saturday as the system is steered by the mid level trough. There is high confidence in this track but timing (speed along the track) remains more uncertain, with a possibly crossing location still between the North West Cape and Denham. Copyright Commonwealth of Australia == The next bulletin for this system will be issued by: 27/0130 UTC.