It is obvious that BoM and Water Corporation rain stations are low down in catchments near the various dams –

convenient near roads and easy for staff to monitor. Click on Select Using Map – Large areas of the catchments are not monitored by BoM rainfall stations. In 1997 this contour map showed annual average rain for SW WA – the rain numbers would have been heavily influenced by pre 1975 higher level rainfall. It would be helpful if the WA Govt or BoM could redo the map using post-1975 rainfall – which is vastly more relevant to water supply issues than pining after pre-1975 numbers.
The WA Dept of Food & Agriculture have a www site for their own network of weather stations – which in many cases also report to the BoM pages – for example the daily rain maps.
Last week I noticed that the DAFWA station Glen Eagle near the Albany Highway between the Canning and Wungong catchments has recorded the stunning total of 1280mm for the year to date.

Perhaps it is at a higher altitude – will try and find out. GE only commenced in August 2015 – I assume DAFWA checks the calibration of their instruments.
Here is my table of catchment stations with 2016 rain totals updated through August.

The zeros & blanks need urgent attention from the BoM and some monthly totals from Water Corp need examination.
The WA Dept of Water has a large network of stations in the catchments but most seem to be discontinued. Here is a map of their stations – Set Site Category to Meteorological.

I checked a string along the Brookton Highway and none was current – it is time consuming to check. Who knows what useful data they may have. We need all data public to audit and produce a better record of catchment rain.