A means of performing simultaneous, high-speed measurements of temperature and $\mathrm{OH}$ lifetime-corrected laser-induced fluorescence (LIF) for tracking unsteady flames has been developed and demonstrated. The system uses the frequency-doubled and frequency-tripled output beams of an $80\mathrm{MHz}$ mode-locked Ti:sapphire laser to achieve ultrashort laser pulses (order $2\mathrm{ps}$ ) for Rayleigh-scattering thermometry at $460\mathrm{nm}$ and lifetime-corrected $\mathrm{OH}$ LIF at $306.5\mathrm{nm}$ , respectively. Simultaneous, high-speed measurements of temperature and $\mathrm{OH}$ number density enable studies of flame chemistry, heat release, and flame extinction in unsteady, strained flames where the local fluorescence-quenching environment is unknown.