Fire Weather Index Calculator

Fire Weather Index Calculator calculator can be used to calculate the Fire Weather Index (FWI) based on various meteorological parameters.

Input Parameters

Calculation Results

Fire Weather Index (FWI)

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The Fire Weather Index (FWI) is a relative index of fire danger that combines relative moisture and fire weather conditions.

Calculation Formula

FWI = (FFMC^0.625) * (DC^0.375) * (ISR^0.2) * (WS^0.1)

Where:
FFMC: Fine Fuel Moisture Code
DC: Drought Code
ISR: Initial Spread Rate
WS: Wind Speed

Fire Weather Index Calculator Calculator Usage Guide

Learn how to use the Fire Weather Index Calculator calculator and its working principles

How to Use the Calculator

  1. Enter the Fine Fuel Moisture Content (FFMC) in the respective input field.
  2. Enter the Drought Code (DC) in the respective input field.
  3. Enter the Initial Spread Rate (ISR) in the respective input field.
  4. Enter the Wind Speed (WS) in the respective input field.
  5. Click the "Calculate" button to compute the Fire Weather Index (FWI).
  6. The calculated FWI will be displayed in the results section.

Working Principle

The Fire Weather Index (FWI) is a relative index of fire danger that combines relative moisture and fire weather conditions. It is used to estimate the potential for wildfire spread and intensity. The FWI is a component of the Canadian Forest Fire Danger Rating System (CFFDRS).

The formula used to calculate the FWI is a combination of the Fine Fuel Moisture Code (FFMC), Drought Code (DC), Initial Spread Rate (ISR), and Wind Speed (WS). Each parameter is raised to a specific power and then multiplied together to produce the FWI value.