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Latest Cumulus MX release 3.6.12 (build 3088) - 10 July 2020 (please see important announcement regarding releases since 3.5.0)
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Apparent - Feels like

From build 3044 the development baton passed to Mark Crossley. Mark has been responsible for all the Builds since. He has made the code available on GitHub. It is Mark's hope that others will join in this development, but at the very least he welcomes your ideas for future developments (see Cumulus MX Development suggestions).

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sutne
Posts: 74
Joined: Sun 14 Oct 2012 4:23 pm
Weather Station: Oregon Scientific WMR100
Operating System: Raspbian Buster
Location: Rjoanddalen, Voss, Norway

Apparent - Feels like

Post by sutne »

In build 3075 this was added:
It adds a new temperature value - Feels Like
........
I know a lot of people do not like the widespread use of "feels like" temperatures on commercial forecasts, but it is prevalent, so I have added to CMX. Use it or not! Some of your site visitors may like it?
I thought I have seen a discussion about this, but I cannot find it.

My question is: What is the difference between Apparent and Feels like?

My problem is that when translating to Norwegian I have always translated Apparent to ‘Følt’ which is ‘Feels like’. So what to do now? Skip one of them, but which?

sfws
Posts: 879
Joined: Fri 27 Jul 2012 11:29 am
Weather Station: Modified Fine Offset
Operating System: Win. 10 PC
Location: The Marches, UK

Re: Apparent - Feels like

Post by sfws »

sutne wrote:
Mon 25 May 2020 1:39 pm
My question is: What is the difference between Apparent and Feels like?
MX has been coded so that

- above 20 oCelsius --> Feels Like reports same value as apparent temperature
- below 10 oCelsius --> Feels Like reports same value as Wind Chill

Between the two Feels Like is a blend of apparent temperature and wind chill, the blend that is apparent temperature reduces the further below 20, and the wind chill blend increases the closer you get to 10.

Here was the PHP code for the 3 derivatives I mention, if that helps you, or anyone else reading this post. Please note I have selected to use Celsius and MPH for my function inputs to suit me, the function could be rewritten for other units.

EDIT: The code has been removed, because although it was right for version 3.6.0, in version 3.6.10 the formulas were all changed, making the code I had quoted here obsolete.

Although I don't use Norwegian, prior to MX adding Feels Like, I was using the terminology of Feels Like for a mixture where either Heat Index or Apparent Temperature or Wind Chill was displayed depending on which disagreed with the standard temperature. See the Wiki article on Feels Like for more details.
Last edited by sfws on Fri 03 Jul 2020 7:28 pm, edited 1 time in total.

sutne
Posts: 74
Joined: Sun 14 Oct 2012 4:23 pm
Weather Station: Oregon Scientific WMR100
Operating System: Raspbian Buster
Location: Rjoanddalen, Voss, Norway

Re: Apparent - Feels like

Post by sutne »

Thank you!
That was clarifying.

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