Situational Awareness (Saturday, 2025-11-22)
Potomac River flows have increased slightly. According to information from the Middle Atlantic River Forecast Center, cumulative precipitation in the watershed ranged from 1/10 to 1/2 inches over the past three days. A 1/10th of an inch or less of rainfall is expected over the next three days.
Special Conditions
None
Daily flows:
Little Falls gage flow 2025-11-21: 1079 MGD (1670 cfs)
Little Falls gage flow 2025-11-22: 1118 MGD (est., based on recently available real-time data) (1730 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2025-11-21: 1144 MGD (1770 cfs)
Point of Rocks flow 2025-11-22: 1293 MGD (est., based on recently available real-time data) (2000 cfs)
Yesterday's estimated daily flows:
Great Falls estimated flow 2025-11-21: 1079 MGD (1669 cfs)
Note: Estimated flow below Great Falls intake is flow at Little Falls plus Little Falls water supply withdrawal.
Yesterday's Washington metropolitan area Potomac River withdrawals and discharges (2025-11-21):
Fairfax Water Corbalis withdrawal - Potomac: 81 MGD
WSSC Water Potomac withdrawal: 132 MGD
Washington Aqueduct withdrawal - Great Falls: 123 MGD
Washington Aqueduct withdrawal - Little Falls: 0 MGD
Loudoun Water withdrawal: 10 MGD
Loudoun Water Broad Run discharge: 8 MGD
Total Potomac withdrawal: 346 MGD
Total net Potomac withdrawal: 338 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 1770 cfs
QPR, obs: 1770 cfs
QPR, WS: 0 cfs
Interstate Commission on the Potomac River Basin