Fire Weather Index (FWI)
The daily Fire Weather Index (FWI) is calculated from the hourly ERA5 reanalysis using the Canadian Forest Fire Weather Index (FWI) System (Turner & Lawson, 1978; Van Wagner, 1985 & 1987, Wang et al., 2015), which is part of the Canadian Wildland Fire Information System (CWFIS). This index is calculated daily over the fire season based on weather observations available at noon local time, i.e., from the 24-hour temperature, relative humidity, wind speed, and precipitation variables, as well as the previous day's fuel moisture conditions as defined in Van Wagner and Pickett (1985). This method has been modified by a more physical approach by reading weather observations at the time when the sun is at its zenith (solar noon), instead of the time set at noon local time.
The methodology for FWI System components calculation is detailed in the Methodology section
FWI System components data, in NetCDF and GeoTIFF formats, are available for download in the Data access
section
Daily FWI map and comparison with the FWI calculated from the CWFIS observation station data
Date: Last date computed =
