No, you can not define the danger level colours and I will not implement that. Those colours are actually more or less standardized. The FWI (used by Australia, Canada, France and Europe as a whole) use the same colours, sometimes expanded with a purple zone above the red with a name Very Extreme
or something. I notice from your link that The Weatherzone
moved to yellow with the qualification Very High
is not the usual qualification for yellow if colour indicators are used and if we are using a five step indicator (apparently the McArthur index
thinks differently about this). I looked on the weatherzone site for an explanation of the index but I can not find it. I assume, they use the Canadian FWI (which has been adopted by Australia as well as far as I know) or the McArthur FFDI
. Both indices are very complex (as I tried to describe on my blog for the FWI
). A complexity which triggered me to develop a simpler index, which can be used on a PWS.
From what I see and the qualification used, I assume the Weatherzone uses the McArthur FFDI which is a six-step index with a final step Catastrophic
A FWI is not about adjusting colours and limits to other indices and that I will not do, it is about a calculation and fitting the concluding number to a danger level. That is what I am currently doing: functional behavioural testing. So I will not try to fit an existing index on a day to day basis (although pwsFWI must have similar results), but I will think about the limits I use (for crossing danger levels) and I will think (am already thinking) of adding a Catastrophic
level. Simply because I already noticed that in your area (NSW) the values over the season may go sky high, beyond what can be seen elsewhere. But I need to think about the limit for that.
My interpretation of my pwsFWI is described in this blog
. Note that the current version uses a max-value of 700 and a five step index. If there is reason, I will change this. But not from day to day. Hope this answer satisfies you.
Btw: your pwsFWI is now in yellow as well, it's only the words which are different!
[edit:] Apparently Australia has adopted a new FWI in 2017
. Still under investigation I assume.
[edit 2:] I now see that you did not ask for changing the colours but the (value)ranges. I could delete all text above
but I'll let it be. And Yes, the goal of our exercise is to get good ranges (and maybe make a catastrophic level). We'll look and evaluate.