There have been misleading comments on TV news implying that BoM rain Outlooks predicted the heavy September rain in western Victoria that has caused flooding around Coleraine and Hamilton. This is not so as is shown on the September rain Outlook map below.
In the flooded zones the prediction was for 50-55% chance of exceeding the median rain.
Readers have mentioned rain in their areas and I have heard of road closures in the bush.
Added 14 Sep: The map compares Year To Date (YTD) rain with the Annual Mean.
Could not make this up. “Please note the rainfall instruments located at Victoria Dam and Mundaring Weir are being serviced and are not currently recording rainfall. We are working to address this and resume measurement as soon as possible.” Still no reply to any emails to WA Govt on this issue. They must release all their daily rain data so various sources can be compared. On 2nd August I posted – Perth dams rain data is in need of an audit. On 2nd May I posted – West Australian Govt Water Corporation fails to record March 2016 rain at several dams.
On the weekend I noticed this error in the BoM rain map –
I thought come Monday they will correct this to 9.27mm. Here we are Tuesday and no such luck, the error has gone into their daily rain numbers – presumably to be discovered in checks at a later date, weeks months away. It has also gone into 3rd party sites like AWN –
there could be others. It puzzles me that an error as gross as this lives on for 3 days – surely a little robot algorithm could flag outliers way less than this. I thought it was topical in view of my call for an audit of Perth dam catchments rain data.
“mem” has commented on information at the Melbourne Water web pages – inflows and storages. Using their csv file from the storage page I made this chart.
In March I blogged – Victorian Labor Govt moves to turn on the Wonthaggi seawater desalination plant – see my chart of Thomson Dam environmental flows –
I am short of time to add much until about 6 Sept – but can do quick blog housework.
From a Western Australian Govt report emailed me – Water Innovation. I have not located it online but could be related to this bumph.
Facts are that rainfall over the Perth-Peel urban areas, the catchment areas for the Gnangara and Jandakot Mounds, plus the Perth Hills water supply dams & and Wellington Dam catchments; would average over 7,000GL of free water from the sky per year.
This absolutely dwarfs any other water on their diagram as the Perth water supply totals about 4% of rain. The efforts of the WA Govt water authorities over decades have been to ignore the benefits of dam catchments management and to allow Perth dams to be effectively decommissioned, while taking Perth water supply to expensive seawater desalination. The Ancient Romans were far better water managers.
We need an audit of WA Govt dam catchments rain data.
Just ran an update as at 31 July – several Water Corporation stations look suspect – several BoM stations are out of date by months. My spreadsheet showing audit required.Source of BoM data and map – for a years daily data enter the 6 digit BoM station ID alongside Station number then click the Get Data button. Map showing dams and localities. BoM map with their sites and dams visible.
In May I reported – West Australian Govt Water Corporation fails to record March 2016 rain at several dams
The WA Govt would have wasted way more free rainwater than this by not managing Perth dam catchments over decades. Spud king Tony Galati’s firm faces water fines
Just noticed this classic water news from Perth – global HQ of the rain-denial-desalination-promotion movement. Water Corp plans waste water treatment expansion, increased desalination – not a word that the Perth region and catchments have enjoyed above average rain in 2016 and in each month except Feb.
Percent rain all Australia so far in May – Percent rain just WA so far in May.
Here is a rain history for Perth catchments – just the runoff season. Pretty good rain on average.