Canadian Forest Fire Weather Index System
Version: no_data_entered
Distribution Contact(s):
  • Natural Resources Canada
Host Agency:
  • Canadian Forest Service

Cataloging Information

  • Canada
  • fire spread
  • FWI - CFFDRS Fire Weather Index System
  • moisture codes
  • moisture content
  • International
Record Maintained By:
Record Last Modified: March 3, 2016
FRAMES Record Number: 898


The Canadian Forest Fire Weather Index (FWI) System consists of six components that account for the effects of fuel moisture and wind on fire behavior. The first three components are fuel moisture codes and are numerical ratings of the moisture content of litter and other fine fuels, the average moisture content of loosely compacted organic layers of moderate depth, and the average moisture content of deep, compact organic layers. The remaining three components are fire behavior indexes which represent the rate of fire spread, the fuel available for combustion, and the frontal fire intensity; their values rise as the fire danger increases.

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