In preparation of the blog about the Canadian FWI, it seems a good idea to publish the results of the actual values of three of the indices I intend to discuss. Especially interesting after the recent heatwave with record temperature values (see the blogs on those memorable days).
Please note, that this blog is one in a series culmination in an argument for a new Fire Weather Index for Personal Weather Stations developed by me. The articles in this blog often are not standalone but related. To appreciate this please check out the tags FWI or pwsFWI (more specific).
The Ångström index and the FMI index are highly similar indices in understanding, functioning and behaviour using only two meteorological parameters: temperature and humidity.
These indices are interesting because they are historically important, they are still in use and because, in discussing these indices, they shed some light on the understanding of the what and how of trying to understand estimating fire weather danger. Continue reading