Total streamflow across the Poplar River was last observed at 84 cfs, and is expected to yield approximately 167 acre-ft of water today; about 37% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 225 cfs, with recent peaks last observed on 2023-04-14 when daily discharge volume was observed at 8,284 cfs.

Maximum discharge along the river is currently at the Poplar River Near Poplar Mt reporting a streamflow rate of 74.5 cfs. This is also the highest stage along the Poplar River, with a gauge stage of 7.17 ft at this location. This river is monitored from 2 different streamgauging stations along the Poplar River, the highest being situated at an altitude of 2,465 ft, the Poplar River At International Boundary.