CBI Fire Danger and Forecast Discussion
Chandler Burning Index Description
The monthly fire potential is represented by a modified version of the Chandler Burning Index (CBI). CBI provides a measure of the effects of average monthly temperature and humidity on fire intensity and rate of spread (not the same as NFDRS rate of spread). Both the intensity and spread components of the Index are linearly related to temperature (an increase in temperature results in a proportionately higher Index), but are exponentially related to humidity (a small decrease in humidity results in a large increase in the Index). The modified version of the Chandler Burning Index is computed from:
CBI = (((110 - 1.373*RH) - 0.54 * (10.20 - T)) * (124 * 10**(-0.0142*RH)))/60
RH = forecast monthly mean afternoon relative humidity (percent)
T = forecast monthly mean afternoon temperature (degrees Celsius)
The Chandler Burning Index has been shown to be highly correlated with monthly fire activity.
*The Hourly Map values may be utilized as a guide to fire danger conditions but should not be used solely by themselves for decision processes.
|Fire Danger Rating and Color Code||Description|
|Low (L) (Green)||Fuels do not ignite readily from small firebrands although a more intense heat source, such as lightning, may start fires in duff or punky wood. Fires in open cured grasslands may burn freely a few hours after rain, but woods fires spread slowly by creeping or smoldering, and burn in irregular fingers. There is little danger of spotting.|
|Moderate (M) (Blue)||Fires can start from most accidental causes but, with the exception of lightning fires in some areas, the number of starts is generally low. Fires in open cured grasslands will burn briskly and spread rapidly on windy days. Timber fires spread slowly to moderately fast. The average fire is of moderate intensity, although heavy concentrations of fuel, especially draped fuel, may burn hot. Short-distance spotting may occur, but is not persistent. Fires are not likely to become serious and control is relatively easy.|
|High (H) (Yellow)||All fine dead fuels ignite readily and fires start easily from most causes. Unattended brush and campfires are likely to escape. Fires spread rapidly and short-distance spotting is common. High-intensity burning may develop on slopes or in concentrations of fine fuels. Fires may become serious and their control difficult unless they are attacked successfully while small.|
|Very High (VH) (Orange)||Fires start easily from all causes and, immediately after ignition, spread rapidly and increase quickly in intensity. Spot fires are a constant danger. Fires burning in light fuels may quickly develop high intensity characteristics such as long-distance spotting and fire whirlwinds when they burn into heavier fuels.|
|Extreme (E) (Red)||Fires start quickly, spread furiously, and burn intensely. All fires are potentially serious. Development into high intensity burning will usually be faster and occur from smaller fires than in the very high fire danger class. Direct attack is rarely possible and may be dangerous except immediately after ignition. Fires that develop headway in heavy slash or in conifer stands may be unmanageable while the extreme burning condition lasts. Under these conditions the only effective and safe control action is on the flanks until the weather changes or the fuel supply lessens.|
National Interagency Fire Center Current Large Incidents Map
Large Incident: A wildfire of 100 acres or more occuring in timber, or a wildfire of 300 acres or more occuring in grass/sage.
Wildland Fire: Any nonstructure fire, other than prescribed fire, that occurs in the wildland.
Wildland Fire - IMT1: Wildland fire; Type 1 Incident Management Team Assigned.
Wildland Fire - IMT2: Wildland fire; Type 2 Incident Management Team Assigned.
Wildland Fire - Other: Wildland fire; Other Incident Management Team Assigned besides a Type 1 or Type 2 team (e.g. Type 3).
Information based on data provided by the National Interagency Fire Center and is subject to change.
The Fire Situation Report
The Fire Situation Report for the week of, October 29, 2012.
CAL FIRE and the National Guard Train for Coming Fire Season
With fire season around the corner, CAL FIRE and the California National Guard are once again training together to ensure California has every resource available to battle the state's wildfires. Each year the two departments join forces to train military pilots to effectively make water drops on wildfires and how to safely integrate into a wildfire situations.
CAL FIRE Warns Residents of Carbon Monoxide Danger
You can't see or smell carbon monoxide, but at high levels it can kill a person in minutes. By following a few simple steps, you can help protect yourself and your family from this silent killer.
Residential Landscape Debris Burning Safety
Burning dry landscape debris can be a convenient way to dispose of excess yard waste as part of a defensible space plan, but it can also be extremely dangerous if not done responsibly. CAL FIRE TV offers tips on how you can be responsible with your landscape debris burning.
National Fire Links
- National Situation Report
- National Interagency Coordination Center
- National Geographic Area Coordination Centers
- Predictive Services Program-Lower 48 Links
- National Fire Weather Page
- Storm Prediction Center National Fire Weather Outlook
- The Experimental Wildfire ABBA Fire Product Maps
Northern California Fire Links
- Northern California Daily Outlook
- Northern California 7 Day Significant Fire Potential
- Northern California (ONCC) Weather
- Northern California (ONCC) Intelligence
- Northern California (ONCC) Fuels/Fire Danger
- Northern California (ONCC) Outlooks
- Northern California (ONCC) Logistics/Dispatch
- Northern California Geographic Area Coordination Center
- California Department of Forestry and Fire Protection (CAL FIRE)
- CDF Statewide Fire Map (PDF)
- CDF CalFire TV on YouTube
- Western Region Fire Weather
- Local Fire Weather Zones
- Northern California Real Time Satellite Fire Monitoring
- GOES-11 Wildfire ABBA
More About Fire And What You Need To Know
- Wildfire is Coming...Is Your Home Ready?
- Wildfire Education Links
- Prevention and Education
- Wildfires-Ready America
CAL FIRE's: Ready Set Go Video
In California, wildfires aren't a question of if, but only a question of when. If you choose to live near a natural area of the state, you are at risk for wildfires and it's your responsibility to prepare yourself, your family, and your home. And that preparation starts with three simple steps: READY, SET, GO!
To Learn More, Go To ReadyForWildfire.org
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