Cyclone Lua

Originating in a broad low pressure area that formed northwest of Australia by 8 March, the storm was plagued by inhibiting wind shear for the duration of its formative stages.

Ultimately intensifying into an upper-end Category 3 severe tropical cyclone with maximum sustained 10-minute winds of 155 km/h (96 mph), Lua made landfall near the remote community of Pardoo, about 150 km (93 mi) east of Port Hedland.

The Government of Western Australia provided disaster relief funds to the hardest-hit areas, and Lua was later retired from the list of tropical cyclone names.

Cyclone Lua originated in a broad area of disturbed weather that was spawned by a deep trough of low pressure and enhanced by a Madden–Julian oscillation pulse.

Moderate vertical wind shear initially hampered intensification,[5] though the BoM designated the system Tropical Low 16U; at the time, it was centred roughly 230 km (140 mi) northwest of Karratha, Western Australia.

[9] Contrary to real-time operations, the official BoM "best track" database does not list the storm as having attained Category 1 tropical cyclone intensity until 0000 UTC on 14 March.

[4] At the time of its designation, Lua was nearly stationary in terms of forward movement, caught in the equilibrium between a blocking ridge to the southwest and increasing monsoonal winds from the northwest.

[15] With a building ridge to its north, Lua accelerated east-southeastward on 15 March,[16] and with wind shear oscillating but generally decreasing, the storm became a Category 3 severe tropical cyclone at 1800 UTC.

[20] Early on 17 March, the storm turned due south toward the Pilbara coast, and the JTWC reported that Lua's peak strength was marked by 1-minute sustained winds of 175 km/h (109 mph), at 0600 UTC.

Communities between Bidyadanga and Port Hedland were under a Red Alert, the highest level of caution issued by the Fire and Emergency Services Authority of Western Australia (FESA).

[32][33] With the destruction wrought by Cyclone Laurence in 2009 still fresh in their minds, residents, business owners, and farmers worked hurriedly to prepare their properties and livestock for Lua's onslaught.

[35] As the storm moved inland, flood warnings were posted throughout the Kimberley and the Pilbara,[26] where officials closed public access to Karijini National Park.

[36] On coming ashore, Cyclona Lua produced strong winds, gusting to 150 km/h (93 mph) at Port Hedland,[37] and appreciable rainfall, peaking at 88.6 mm (3.49 in) at Bidyadanga.

[38] Preliminary assessments suggested that Pardoo Roadhouse and the small surrounding community bore the brunt of the storm, as most towns and farms in the region escaped relatively unscathed.

[43] In the aftermath of the storm, the Western Australia state government allocated relief funds to offset the cost of recovery and clean-up in several of the affected towns.

Individuals and families became eligible to apply for personal grants and small business owners would be considered for special interest rates on new loans.

[44] Local government entities listed under the proclamation were the shires of Ashburton, Broome, East Pilbara, Meekatharra, and the Town of Port Hedland.

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
Tropical depression (≤38 mph, ≤62 km/h)
Tropical storm (39–73 mph, 63–118 km/h)
Category 1 (74–95 mph, 119–153 km/h)
Category 2 (96–110 mph, 154–177 km/h)
Category 3 (111–129 mph, 178–208 km/h)
Category 4 (130–156 mph, 209–251 km/h)
Category 5 (≥157 mph, ≥252 km/h)
Unknown
Storm type
triangle Extratropical cyclone , remnant low, tropical disturbance, or monsoon depression
Tropical Low 16U meandering off the Australian coast on 13 March
Microwave-enhanced satellite image of Lua at 0000 UTC on 17 March, at peak intensity; a well-defined centre is visible