Fire Weather Index Sytem

The Fire Weather Index System is one of the modelling components calculated in the Global ECMWF Fire forecast system for the European Forest Fire Integrated Forecasting System (EFFIS).

Description & Technical Information


6 outputs are generated in terms of fire danger indices that are then distributed to the EFFIS network and already used among the European civil protections:

  • Fire Weather Index
  • Build Up Index
  • Duff Moisture Code
  • Drought Code
  • Fine Fuel Moisture Code
  • Initial Spread Index

Technical information

References Di Giuseppe, Francesca, et al. "The potential predictability of fire danger provided by numerical weather prediction." Journal of Applied Meteorology and Climatology 55.11 (2016): 2469-2491.
References (2) Vitolo, C., F. Di Giuseppe, and M. D’Andrea, 2017: caliver R package version 1.0. URL:, DOI:
References (3) Vitolo C., Di Giuseppe F., and D’Andrea M.. Caliver: An r package for calibration and verification of forest fire gridded model outputs. PLOS ONE, 13(1):1–18, 01 2018. doi: 10.1371/journal.pone.0189419. (
References (4) Di Giuseppe, F., and C. Vitolo, 2017: Danger class definition in a global fire early warning system (in preparation).
References (5) Vitolo, C. and Di Giuseppe F., 2018: 40 years of global fire danger calculation using the ECMWF Re-Analysis (ERA)-Interim database (in preparation)
Developer ECMWF
External link Fire danger reanalysis dataset (coming soon via the Climate Data Store)
External link (2) Fire danger realtime datase (coming soon via the Climate Data Store)
Development Stage TRL=9