When you hear all the yakka on TV about heatwaves, hottest this or that, hottest bushfire since?? – remember they seldom tell you most of us had plenty of winter rain, we had a cool & wet September – then a cool October now followed by a moderate November. And why is it news that summer is starting on time.
Chris Gillham in Perth has been monitoring mean daily temperatures at Perth BoM sites and says Perth Airport 9021 is a shoo-in to have the coldest September mean since opening in 1944. Perth Metro 9225 in Mount Lawley has only been open from Jan 1994 replaced Perth Regional Office 9034 which commenced 1897 and underwent various moves before ending up in East Perth. Progress with temperature updates can be checked at AWN or the BoM.
Chris has a page discussing the history of various Perth weather stations since 1897. I will update as the final numbers are available and hope to include other Perth region sites such as Pearce – Jandakot – Medina etc It is amazing we can have a month like this in the teeth of the vast Perth urban heat island.
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.
Just ran an update as at 31 July – several Water Corporation stations look suspect – several BoM stations are out of date by months.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
This animation for the 12th to 15th July 2016 shows a cool anomaly which moves from northern WA into the NT then into Qld.
You can see daily temps by clicking on districts at this AWN map. BoM “Climate statistics for Australian locations” give you the existing record. Change stations by changing station # in URL. To see the seven records I noted Continue reading
Weather warning: East coast low brings flash flooding, strong winds and damaging surf – BoM current rain page.
In percentage terms – plenty of rain across our north this month which is usually the start of the dry.
Some of the high rain areas on this map will be worth multi-$Millions in extra agricultural production. The plus 400% contour should be a bit wider east and SE of Darwin – where two outback stations scored +100mm on the 10th.
The centre of our largest urban heat island reached 34.2 on 6 Apr 2016 topping 33.9 from 5 Apr 1986.
Other stations I have checked that were open in 1986 were all hotter in April 1986.
Sydney Airport 34.7 on 6 Apr 2016 but 35.7 on 4 Apr 1986
Bankstown AP 35.8 on 6 Apr 2016 but 36.9 on 4 Apr 1986
Parramatta Nth 35.2 on 6 Apr 2016 but 37 on 4 Apr 1986
Richmond RAAF(067105) 36.6 on 6 Apr 2016 but Richmond RAAF(067033) 38.2 on 4 Apr 1986
The ABC TV weather news was beating up Penrith but that station did not open until 1995 and there seems to be no other Penrith station – tough – what liars.
Looking at the state I have checked Goulburn, Condobolin, Cobar, Bourke – the first 3 were all hotter in Apr 1986. Bourke Post Office was hotter 3 times between 1906 and 1922. So just now I can not find that 6 April made a record hot day anywhere in NSW except Sydney Obs Hill – any suggestions? This would be remarkable.