Total streamflow across the Tuolumne River was last observed at 1,463 cfs, and is expected to yield approximately 2,902 acre-ft of water today; about 13% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 10,987 cfs, with recent peaks last observed on 2023-05-26 when daily discharge volume was observed at 51,230 cfs.

Maximum discharge along the river is currently at the Tuolumne R Bl Early Intake Nr Mather Ca reporting a streamflow rate of 950 cfs. However, the streamgauge with the highest stage along the river is the Tuolumne R A Modesto Ca with a gauge stage of 37.46 ft. This river is monitored from 6 different streamgauging stations along the Tuolumne River, the highest being situated at an altitude of 3,831 ft, the Tuolumne R A Grand Cyn Of Tuolumne Ab Hetch Hetchy.