The BOM has been tinkering with its app. Here's how to read the rainfall forecast correctly

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So what triggered the change, what do all of the new numbers mean, and how does this compare to the rest of the world?

abc.net.au/news/bom-rainfall-forecast-app-update/101279066The Bureau of Meteorology has updated how it is communicating the rainfall forecast on its official weather app and the change has triggered a wave of confusion.The Bureau of Meteorology has been tweaking how it is communicating the rainfall forecast on its BOM app

According to BOM forecaster Jonathan How, the change has come about because the previous format was often misinterpreted. How to communicate what that wide range of possible outcomes is most likely to mean, in a succinct way for the public, is where things get even more tricky.

To reiterate, when looking at the website forecast, half the time there is likely to be less rain than the lowest number indicated as possible rainfall.The opening screen of the BOM app displays the new rainfall range, Monday, August 22, 2022. While the second number represents a 25 per cent chance of at least that amount of rainfall occurring, the same top value as in the old format.This new range, perhaps more intuitively, covers the middle 50 per cent of possible outcomes.

"We have had that feedback that people miss the chance of rainfall. But the whole idea is that that whole chance of rainfall was often being misinterpreted," Mr How said.App and website not matching up

 

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The weather forecasts are wrong half the time anyway so what’s the point.

Would like to see WBGT added to the app or have I missed that. Great for deciding if its the wrong time to be exercising or strenuous activity. BOM_au

They also tinker with temperature data sets. Apparently homogenising the weather is called sCIenCe.

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