It is months since this complaint went into the BoM and all I have had back is a couple of URL’s that will not open. Continue reading BoM chooses not to explain Perth dams faulty rainfall data
Monthly Archives: July 2018
BoM June 2018 Outlooks all failures
First checking daytime max temperature and we see a huge part of SE Australia with an 80% chance of seeing hotter than average days. The real world anomalies showed exactly the opposite with the SE cool.
The minimum – night-time temperature prediction had an east-west band of heat across the continent. And warmer nights in the SE coastal fringe. In real life June nights were mostly cooler than average across Australia with no sign of an east-west warm band.
The June rain Outlook was for mostly dry conditions in the SE yet there were many areas of average or near average rain there.
Amazing – BoM adopts rational view Perth rain history
News today from Perth hat tip to Chris Gillham – Perth weather: Why the Bureau of Meteorology dropped more than a century of rainfall figures 3Jul18 Facts are Perth region rain changed to a lower rain regime about 1975 – over 40 years ago. Of course it makes sense to view Perth region rain against post 1975 records because that is the rain regime Perth is experiencing. Anybody is still free to quote the older higher rain numbers pre 1975. The WA Govt can still bleat on about “our drying climate” as their assorted Water Depts do. Of course there are regions of Australia where the opposite has happened and rain has increased. About a decade ago the WA Ag. Dept used to advise farmers to use 30 or 35 year rain averages to avoid having unrealistic rain expectations – made sense. The WA Govt views on their rain history have oozed east to scaremonger eastern States water policies – on for example the needless introduction of several seawater desal plants at a total cost of many $Billions. More later on this. Just in May the WA Govt Water Corporation stopped publishing Perth dams rain numbers.