Situational Awareness (Monday, 2025-11-17)
According to the Middle Atlantic River Forecast Center, there was no significant rainfall in the Potomac watershed yesterday. An average accumulation of more than 1/4 inch is expected over the next three days.
Special Conditions
None
Daily flows:
Little Falls gage flow 2025-11-16: 982 MGD (1520 cfs)
Little Falls gage flow 2025-11-17: 911 MGD (est., based on recently available real-time data) (1410 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2025-11-16: 1079 MGD (1670 cfs)
Point of Rocks flow 2025-11-17: 1125 MGD (est., based on recently available real-time data) (1740 cfs)
Yesterday's estimated daily flows:
Great Falls estimated flow 2025-11-16: 982 MGD (1519 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 (2025-11-16):
Fairfax Water Corbalis withdrawal - Potomac: 93 MGD
WSSC Water Potomac withdrawal: 148 MGD
Washington Aqueduct withdrawal - Great Falls: 122 MGD
Washington Aqueduct withdrawal - Little Falls: 0 MGD
Loudoun Water withdrawal: 10 MGD
Loudoun Water Broad Run discharge: 8 MGD
Total Potomac withdrawal: 372 MGD
Total net Potomac withdrawal: 365 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 1670 cfs
QPR, obs: 1670 cfs
QPR, WS: 0 cfs