Australia: Adverse weather forecast across far southern parts of Western Australia through at least April 13

Event

Heavy rainfall, strong winds, and hail are forecast to continue across the far southern areas of Western Australia through at least April 13. A low-pressure system is forecast to track slowly eastwards before weakening and moving offshore. The Australian Bureau of Meteorology (BoM) has issued a severe weather warning for heavy rainfall and damaging winds for parts of South East Coastal, Goldfields, South Coastal, and Great Southern districts and a severe thunderstorm warning for heavy rainfall, large hailstones, and damaging winds over portions of the South Coastal, South East Coastal, and Great Southern districts. A flood watch is in place for parts of the South East Coastal District.

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)
Main Roads Western Australia