Canadian Fire Weather Index System

Canada Duff Moisture Code (DMC) Map

DMC represents moisture in loosely compacted organic layers of moderate depth. It responds more slowly than FFMC and contributes to estimates of fuel available for combustion.

Natural Resources Canada · CWFIS
Duff Moisture Code (DMC)

Loading the official DMC layer…

What it means

How to interpret DMC

Increasing DMC values generally indicate progressively drier medium-depth organic fuels. DMC is combined with Drought Code to calculate the Buildup Index.

Important limitation

Fire weather is context, not a local prediction

DMC is not a soil-moisture measurement, drought declaration, or forecast of how a particular wildfire will behave. Local fuels, terrain and weather remain important.

How DMC fits into CFFDRS

Canada's Fire Weather Index System connects weather observations to fuel-moisture codes and fire-behaviour indices. FireRadar keeps each component separate so users can see what is actually being measured or derived instead of receiving an opaque combined risk score.

Use official operational guidance for decisions

CWFIS products are broad national fire-weather guidance. Provincial, territorial, Indigenous, municipal and Parks Canada authorities remain responsible for operational fire danger, restrictions, wildfire response and emergency decisions.

Official methodology and source

FireRadar renders the official Natural Resources Canada CWFIS layer directly and preserves the upstream symbology. It does not interpolate a value when the source is unavailable or transform this component into a FireRadar property-risk score.