TABLE 12: Probability of Ignition Table
Shading (%) Dry-bulb Temp. (F) FINE DEAD FUEL MOISTURE (PERCENT)
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Unshaded < 50% 110+ 100 100 80 70 60 60 50 40 40 30 30 20 20 20 20 10
100-109 100 90 80 70 60 60 50 40 40 30 30 20 20 20 10 10
90-99 100 90 80 70 60 50 40 40 30 30 30 20 20 20 10 10
   
80-89 100 90 80 70 60 50 40 40 30 30 20 20 20 10 10 10
70-79 100 80 70 60 60 50 40 40 30 30 20 20 20 10 10 10
60-69 90 80 70 60 50 50 40 30 30 20 20 20 20 10 10 10
 
50-59 90 80 70 60 50 40 40 30 30 20 20 20 10 10 10 10
40-49 90 80 70 60 50 40 40 30 30 20 20 20 10 10 10 10
30-39 80 70 60 50 50 40 30 30 20 20 20 10 10 10 10 10
Shaded > 50% 110+ 100 90 80 70 60 50 50 40 40 30 30 20 20 20 10 10
100-109 100 90 80 70 60 50 50 40 30 30 30 20 20 20 10 10
90-99 100 90 80 70 60 50 40 40 30 30 20 20 20 10 10 10
 
80-89 100 80 70 60 60 50 40 40 30 30 20 20 20 10 10 10
70-79 90 80 70 60 50 50 40 30 30 30 20 20 20 10 10 10
60-69 90 80 70 60 50 40 40 30 30 20 20 20 10 10 10 10
 
50-59 90 80 70 60 50 40 40 30 30 20 20 20 10 10 10 10
40-49 90 80 60 50 50 40 30 30 30 20 20 20 10 10 10 10
30-39 80 80 60 50 50 40 30 30 20 20 20 10 10 10 10 10
PI > 70% HIGH PROBABILITY OF SPOT FIRES