Heavy isolated showers with expanses of cloud over Western Australia are continuing to consolidate heavy falls seen in the last month.
An upper level trough which extended from the Pilbara coast to Eucla yesterday stimulated isolated heavy showers and thunderstorms, mostly confined to the Pilbara and Gascoyne regions.
The heaviest 24 hour totals fell over Bulloo Downs in the Pilbara region with the gauge reading 30mm at 9am this morning. Surrounding areas also received some decent falls with Barimunya seeing 18mm.
Thunderstorms are still firing over the Pilbara and Gascoyne regions this morning as the region of instability continues to move towards the east.
Although not as intense, this synoptic setup over WA is similar to a pair of low pressure troughs which developed to bring heavy rain late in April and early May.
Late in April, far western parts of WA were drenched under torrential rain with Exmouth receiving 206mm in just 24 hours. Nearby Learmonth also saw immense falls with 154mm in the 24 hour period.
Just over a week later, a second front and trough brought further heavy falls to the region with Roebourne seeing 126mm while Dampier picked up 121mm.
The upper level disturbance which residents of western WA are seeing this week is bringing yet more moisture to the region to consolidate the recent rain.
In the coming days this trough is expected to become more evident at surface altitudes and move in an easterly direction drawing what's left of the moisture into southwestern parts of South Australia.
As this trough moves east it is expected to weaken and bring little to no impact to the southern capitals with the exception of some high cloud limit warming.
© Weatherzone 2014
17:34 EST The weather bureau's long-term forecast is predicting a drier than normal October to December for much of eastern Australia and north-west Western Australia.