Blackbody radiation at 3.9 mu m increases rapidly with temperature. Th
is fact suggests a potential application by fire weather meteorologist
s of the 3.9-mu m imagery data provided by the new GOES-8 weather sate
llite. The ability of the 3.9-mu m channel to sense forest fires is br
iefly discussed and an example case study is presented. A simple radia
tion model is used to estimate the minimum detectable fire size for se
veral types of wildfires.