The start of spring brought thunderstorms to Sydney last weekend and this weekend it's Adelaide's turn. As Adelaide and Melbourne continue to ride the spring temperature see-saw, a cold front is expected to bring thunderstorms to South Australia and western parts of Victoria on Sunday. 

Thunderstorms are likely to kick off early on Sunday morning over South Australia's West Coast and Eyre Peninsula, reaching Adelaide around midday then are expected to explode across eastern parts of South Australia, western Victoria and far southwest NSW during the afternoon.

Winds are expected to become gusty across a broad area of South Australia tomorrow afternoon, generally peaking in the 60-80km/h range, just below warning thresholds. Thunderstorms however have the potential to become severe, producing wind gusts exceeding 90km/h. 

Rainfall may be intense but will be brief due to the thunderstorms' fast-moving nature. As such, rainfall totals are unlikely to exceed 20mm across South Australia and Victoria.

Image: Forecast total rainfall for weekend ending 10pm AEST Sunday 13th September according to ECMWF. Source: Weatherzone 

For Victoria, high-resolution Australian model guidance (ACCESS-C-VIC), suggests that a gust front could develop across the northwest of the state with the thunderstorm activity. If this were to occur between October and December when rye grass pollen is at its peak then Epidemic Thunderstorm Asthma could be a significant risk. The pollen count for Sunday is forecast to be low so the risk of this occurring is low (BoM also does not issue this forecast until October 1st). Nevertheless, those who are susceptible to asthma should be aware of the upcoming Epidemic Thunderstorm Asthma season, more details here.

Image: Forecast wind gusts for Victoria at 4pm AEST according to ACCESS-C VIC. Source: Weatherzone 

Be sure to keep up to date with all the weather forecasts and warnings at Weatherzone or using the Weatherzone App.