Situational Awareness (Tuesday, 2025-10-28)
According to information from the Middle Atlantic River Forecast Center, no precipitation fell in the Potomac watershed above Little Falls during the past 24 hours, but accumulations of 1 1/2 to 2 inches are expected over the next three days.
Special Conditions
None
Daily flows:
Little Falls gage flow 2025-10-27: 931 MGD (1440 cfs)
Little Falls gage flow 2025-10-28: 885 MGD (est., based on recently available real-time data) (1370 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2025-10-27: 1015 MGD (1570 cfs)
Point of Rocks flow 2025-10-28: 1047 MGD (est., based on recently available real-time data) (1620 cfs)
Yesterday's estimated daily flows:
Great Falls estimated flow 2025-10-27: 931 MGD (1440 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 (2025-10-27):
Fairfax Water Corbalis withdrawal - Potomac: 107 MGD
WSSC Water Potomac withdrawal: 132 MGD
Washington Aqueduct withdrawal - Great Falls: 123 MGD
Washington Aqueduct withdrawal - Little Falls: 0 MGD
Loudoun Water withdrawal: 11 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: 1570 cfs
QPR, obs: 1570 cfs
QPR, WS: 0 cfs