Category Archives: BoM Australia

Weather Bureau for Australia

Australian Bureau of Meteorology rain Outlooks – failure looming in March and flip-flop confusion for April

In late February the BoM forecast March and April rain as follows.

Now rain to date for March (1st to 26th) shows Australia was wet in the west and dry to average in the east- sort of exact opposite of the above March rain Outlook.

Now note the February Outlook for April in top panel forecasting a dry April.
Contrast that with the new April rain Outlook just issued forecasting a widespread wet.

Who could believe a word the BoM utters when they keep changing predictions.

The ABC hosts the BoM prattling on about a warmer than average Autumn for Canberra but ignores inconvenient fact that the BoM summer Outlook failed for the ACT region

Canberra set for warmer than average autumn due to rise in ocean temperatures: Bureau of Meteorology. The BoM said “…this year’s autumn weather conditions would be relative to 2014, which saw record-breaking temperatures.” What are they talking about ? Autumn 2014 was near average for the ACT.
Summer Outlooks for Australia only had minor areas cooler than average or in the uncoloured average zones.

Real world summer days saw anomalies in the -1° to +1°C zone or cooler for the majority of Australia.

Where are the category 5 wind gust observations for Cyclone Marcia?

The BoM rates Marcia as a Cat 5 now – yet the strongest wind gusts I can find are 208kmh at Middle Percy Island at 4.30am. which indicates Cat 3.
ABC News24 is quoting wind gusts 300kmh – the Qld Premier is on news quoting 280kmh wind gusts.
As I write coming up 11.30am St Lawrence had gusts of 44kmh at 4am and Williamson 96kmh recorded at 8.30am Qld time of course. Williamson looks near fair & square in the path. Can anybody point me to online Cat 5 wind observations ?

Australian Bureau of Meteorology predicted a dry January but it turned out very wet

A major rain event starting in Alice Springs ~7th and running about a week destroyed the BoM dry prediction. I have not seen a reason quoted for that – did the jetstream wobble – for sure the moonsoon belt fired up to the south. I wonder how useful this rain Outlook was.
January rain Outlook

January actual rain percentages – you can make maps of other parameters

Sydney enjoys coldest Australia Day for 58 years

Of course you are seeing this in MSM headlines?
Yesterday Sydney barely struggled above 20°C on Australia Day the 26th January 2015 – in the face of the ever growing urban heat island too – 30 minute data preserved – online here – In 1965 the max was 20.7 (ACORN says 20.9) then in 1957 the max was 19.4 (ACORN said 19.6) Daily max and min data – as I write the BoM is slow to update the max for Monday. But Australian Weather News already has Monday the 26th at 20.0

How much longer will the Abbott Government allow the Bureau of Meteorology to damage itself by keeping on crying wolf about ordinary very hot spells

There we go again – BoM predictions of heat records – Weather records set to tumble with temperatures in WA tipped to hit 50C
But the BoM predictions were shown to be rubbish after weather reality. ‘Extreme heatwave’ in WA’s north brings sizzling temperatures but no records
A quick look around Pilbara and nearby regions from this AWN map – shows that except for the Marble Bar near miss – how hollow the BoM predictions turned out.
This is how pitiful their record hot day turned out –

BoM calls a hottest day ever record temperature in Alice Springs 4.5°C above reality

How could professional met people make such a huge mistake? BoM withdraws advice Alice Springs recorded its hottest day ever, blames faulty thermometer
It just shows the pressure people in the organization must feel after a damp and mild start to January. To not take time checking that before blurting out their twaddle to the ABC. Even now at 4pm AEST this BoM page shows 46 – and the AWN page with feed from deep in the BoM shows 42 – why 42 – where did that come from if their spokesfolk are telling the ABC 41.5.

Australian Bureau of Meteorology fails to repair their flagship ACORN temperature dataset as the Director of Meteorology expected

In May 2014 I got a reply from Dr Rob Vertessy, Director of the BoM – to my pointing out that the ACORN-SAT data set had about a thousand examples where a daily MAX was less than the daily MIN. Dr Vertessy said that he expected that these errors would be corrected in an updated version of ACORN-SAT in the second half of 2014.

I just checked ACORN data for Alice Springs back to 1986 and the exact errors discovered by Ed Thurstan in 2013 are still there.


I have not got time to check for a thousand errors so I am assuming the ACORN update is running late. I am not surprised – as I point out in my articles examining ACORN data for Cobar – the ACORN methodology is illogical – relying on computer driven data mining comparisons hundreds of km from Cobar while ignoring data much more adjacent. Cobar ACORN I and Cobar ACORN II. The BoM should save taxpayers some money and scrap the ACORN disaster now.