Australia: Adverse weather forecast across parts of northern Western Australia through at least March 4 /update 9

Event

Adverse weather associated with the remnants of Tropical Cyclone Anika is forecast across parts of northern Western Australia through at least March 4. The Australian Bureau of Meteorology (BoM) has issued a severe weather warning for heavy rainfall and damaging winds for parts of North Interior and South Interior districts, including Carnegie, Parnngurr, and Warburton. As of late March 3, the remnants of the storm system were located over Parnngurr and the system is expected to weaken as is it moves southeast through March 4.

Damaging wind gusts peaking at around 110 kph (68 mph) are likely near the center of the system, which could cause damage to homes and property. Heavy rainfall with 24-hour totals of 10-20 cm (4-8 inches) and localized amounts of up to 25 cm (10 inches) are possible in the affected area and could lead to flash flooding. The BoM has issued flood warnings for the Sandy Desert and West Kimberley District and a flood watch for parts of northwest Western Australia. Both the wind intensity and precipitation are expected to gradually ease throughout March 4.

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 the soil has become saturated by heavy rainfall.

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.

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)