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Weather
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Antarctica
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73.1 | °F |
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20.8 | % |
Fire Danger Index
Chandler Burning Index (CBI)The Chandler Burning Index (CBI) uses the air temperature and relative humidity to calculate a numerical index of fire danger. That number is then equated to the Fire Danger severity of either extreme, very high, high, moderate, or low. It's based solely on weather conditions, with no adjustment for fuel moisture.
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92Tucson |
Current risk
90 < CBI < 97,5
Very high
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.
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Formula --> CBI = (((110 - 1.373 * RH) - 0.54 * (10.20 - T)) * (124 * 10(-0.0142 * RH)))/60
Application --> CBI = (((110 - 1.373 * 20.8 ) - 0.54 * (10.20 - 22.8333)) * (124 * 10(-0.0142 * 20.8 )))/60 ≅ 92
| T = Air temperature | [°C] | / | RH = Relative humidity | [ %] |
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