Landscape Burn Probability Outputs
Important! LBP outputs are relative within each landscape model run and CANNOT be compared across different model runs.
Important! Different than FSim - IFTDSS LBP calculates burn probability and conditional flame length for a fixed set of weather conditions for a single burn period. The Large Fire Simulation Model (FSim, Finney and others 2011) used in many national, regional, and unit level assessments, calculates results based on variable weather inputs for fires burning multiple days throughout an entire fire season.
See the LBP technical documentation for more detail.
Select LBP outputs are available as geospatial layers in Map Studio, displayed in IFTDSS summary reports, and available for download and use within other applications. Availability of each output is listed below.
| Output | Brief Description | Map Studio Units | Report Units | Download Units |
|---|---|---|---|---|
| Burn Probability | The likelihood that a fire will burn a given point on the landscape (expressed as a value between 0 and 1). See Burn Probability for more detail. | proportion | proportion | proportion |
| Conditional Flame Length | The mean flame length of all the fires that burn a given point on the landscape. See Conditional Flame Length for more detail. | feet | feet | feet |
| Integrated Hazard | The combination of Burn Probability and Conditional Flame Length class ranging from lowest probability/lowest conditional flame lengths to highest probability/highest conditional flame lengths. See Integrated Hazard for more detail. | categorical | categorical | categorical |
| Proportion of Flame Lengths 0-2 ft | The probability of fire burning with a flame length between >0 and 2 ft (expressed as a value between 0 and 1). See Flame Length Probability for more detail. | N/A | N/A | proportion |
| Proportion of Flame Lengths 2-4 ft | The probability of fire burning with a flame length between >2 and 4 ft (expressed as a value between 0 and 1). See Flame Length Probability for more detail. | N/A | N/A | proportion |
| Proportion of Flame Lengths 4-6 ft | The probability of fire burning with a flame length between >4 and 6 ft (expressed as a value between 0 and 1). See Flame Length Probability for more detail. | N/A | N/A | proportion |
| Proportion of Flame Lengths 6-8 ft | The probability of fire burning with a flame length between >6 and 8 ft (expressed as a value between 0 and 1). See Flame Length Probability for more detail. | N/A | N/A | proportion |
| Proportion of Flame Lengths 8-12 ft | The probability of fire burning with a flame length between >8 and 12 ft (expressed as a value between 0 and 1). See Flame Length Probability for more detail. | N/A | N/A | proportion |
| Proportion of Flame Lengths >12 ft | The probability of fire burning with a flame length between >12 ft (expressed as a value between 0 and 1). See Flame Length Probability for more detail. | N/A | N/A | proportion |
| 1-hr Fuel Moisture | Moisture content of 1-hour fuel (dead woody fuel 0 to ¼ inch or 0 to 6.4 mm in diameter) is the mass of water within the fuel particle expressed as a percentage of the fuel particle’s oven-dry mass. See Fuel Moisture for more detail. | percent | N/A | percent |
| 10-hr Fuel Moisture | Moisture content of 10-hour fuel (dead woody fuel ¼ to 1 inch or 0.6 to 2.5 cm in diameter) is the mass of water within the fuel particle expressed as a percentage of the fuel particle’s oven-dry mass. See Fuel Moisture for more detail. | percent | N/A | percent |
| 100-hr Fuel Moisture | Moisture content of 100-hour fuel (dead woody fuel 1 to 3 inches or 2.5 to 7.6 cm in diameter) is the mass of water within the fuel particle expressed as a percentage of the fuel particle’s oven-dry mass. See Fuel Moisture. for more detail. | percent | N/A | percent |
| Midflame Wind Speed | Wind velocity at the midflame height. Calculated using wind adjustment factors based on stand height and canopy cover and the Wind Speed. See Midflame Wind Speed for more detail. | mph | N/A | mph |
| 20 Ft Wind Speed | Wind velocity measured 20 feet (6 m) above the top of the tree or shrub canopy, or above the ground if canopy is absent. | N/A | N/A | mph |
| 20 Ft Wind Direction | Wind direction is the direction from which the wind is blowing, specified in degrees increasing clockwise from north (which is zero degrees), Uphill or Downhill. | N/A | N/A | degrees |