Rate of Spread

{
  "id": "MLC-T-ENV-023130",
  "term": "Rate of Spread",
  "field": "Environment",
  "definition": "Relative activity of a fire in extending its horizontal dimensions. It is expressed as a rate of increase of the total perimeter of the fire, as rate of forward spread of the fire front, or as rate of increase in area, depending on the intended use of the information. Usually it is expressed in chains or acres per hour for a specific period in the fire's history.",
  "references": [
    "NWCG InciWeb Terminology"
  ],
  "url": "https://mlchart.com/terminology/environment/rate-of-spread/"
}