Hourly Fine Fuel Moisture Code (HFFMC) tracks the moisture of small, fast-drying fuels over a similar time interval.
HFFMC is the closest Canadian equivalent to Moisture 1H but is more general and not tied to specific fuel types, instead representing fine surface fuels within a soil depth of 0–2 cm. Unlike Moisture 1H, which is measured as a percentage, HFFMC is a unitless index where higher values correspond to drier conditions.