Australia: Adverse weather forecast across parts of northwestern Western Australia through at least May 31

Event

Heavy rainfall is forecast across northwestern Western Australia through at least May 31. A system is forecast to track northeastwards across the Pilbara coast and onto the western Kimberley Coast. As of May 30, the Australian Bureau of Meteorology (BoM) has issued a severe weather warning for heavy rainfall in parts of Kimberley and Pilbara districts. Six-hourly rainfall totals of 4-8 cm (1.5-3 inches) are likely across the affected area with heavier rain of 8-12 cm (3-5 inches) likely near the coast. A flood watch is in place for parts of the Pilbara coast and Sandy Desert. Officials could update and possibly extend the coverage of weather alerts over the coming days.

Hazardous Conditions
Sustained heavy rainfall could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed stormwater drainage systems. Sites located downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides are possible in hilly or mountainous areas, especially where heavy rainfall has saturated the soil.

Authorities could issue mandatory evacuation orders for flood-prone communities over the coming days. Disruptions to electricity and telecommunications services are possible where significant flooding or landslides impact utility networks.

Transport
The severe weather will likely contribute to transport disruptions throughout the region. Traffic and commercial trucking delays might occur along regional highways. Flooding downpours could inundate some low-lying roads in areas with poor drainage. Strong winds might also pose a hazard to high-profile vehicles. Hazardous weather conditions might cause flight delays and cancellations at airports in the affected region. Authorities may temporarily suspend port operations along parts of the Pilbara coast if strong winds trigger hazardous sea conditions, impacting freight and passenger maritime traffic.

Advice

Monitor local media for updated emergency and weather information. Seek updated information on weather and road conditions before driving or routing shipments through areas where severe weather is forecast. Plan accordingly for potential delivery delays if routing shipments by truck through the affected area. Do not attempt to drive through flooded areas. Charge battery-powered devices in the case of prolonged electricity outages.

Resources

Australian Bureau of Meteorology (BoM)
Western Australia Department of Fire and Emergency Services (DFES)
Main Roads Western Australia