Intensity. Maximum energy release rate: 73 X 10^ B.t.u./sec; fire 

 intensity: 3,150 B.t.u./sec.-ft. 



1800. Fire has advanced on east front. 



Weather. Free-atmosphere conditions at 5,000 ft.: Winds 33 m.p.h.; 

 relative humidity 20 percent; dry -bulb temperature 73° F. 



Rate of spread. 2.5 m.p.h.; could have peaked at more than 5 to 8 

 m.p.h., as measured by rescue team. 



Fuels. In frontal advance: 10-percent ground +90-percent brush 

 +95-percent crown. 



Intensity. Maximum energy release rate: 358 X 10* B.t.u./sec; fire 

 intensity: 11,300 B.t.u./sec.-ft. — highest level up to this time. 



1900. Fire has reached ridge between McCormick and Homestead Creeks; 

 ground fire lagging main front, brush controlling spread, considerable 

 crowning. 



Weather. Free-atmosphere conditions at 5,000 ft.: Winds 37 m.p.h. 

 SW; relative humidity 21 percent; dry-bulb temperature 71° F. 



Rate of spread. 1 m.p.h. 



Fuels. In frontal advance: 6-percent ground +95-percent brush 

 +60-percent crown. 



Intensity. Maximum energy release rate: 72 X 10* B.t.u./sec; fire 

 intensity: 3,400 B.t.u./sec.-ft. 



2000. Fire in Pack River drainage; "fire storm"; convection column 31,000 ft. 



Weather. Free-atmosphere conditions at 5,000 ft.: Winds 44 m.p.h. 

 SW; relative humidity 23 percent; dry-bulb temperature 68° F. 



Rate of spread. 6 m.p.h. approaching Apache Ridge. 



Fuels. In frontal advance: 6-percent ground +60-percent brush 

 +95-percent crown. 



Intensity. Maximum energy release rate: 474 X 10* B.t.u./sec; fire 

 intensity: 22,500 B.t.u./sec.-ft. These are maximum values for the 

 entire run. 



2100. Fire has advanced over Apache Ridge and into Falls and Roman Nose 

 drainages; convection column 35,000 ft. 



Weather. Free-atmosphere conditions at 5,000 ft.: Winds 45 m.p.h. 

 SW; relative humidity 28 percent; dry-bulb temperature 66° F. Wind- 

 speed as checked by Roman Nose lookout was steady at 35 to 40 

 m.p.h. 



Rate of spread. 2.5 m.p.h. 



15 



