Turbulence spectra measured during fire front passage

► We investigated turbulence spectra generated by wildfires from four experiments. ► Spectral energy increased at high frequency during the FFP for all four cases. ► Spectral energy at low frequency during FFP varied with environmental factors. ► Normalized velocity spectra observed during FFP converged when scaled with u*. ► Normalized temperature spectra observed during FFP scattered when scaled with T*.