Situational Awareness (Thursday, 2025-12-04)
Dry conditions persist. According to information from the Middle Atlantic River Forecast Center, no rain fell in the Potomac watershed during the past day and an average accumulation of only 1/4 inch is expected over the next 10 days.
Special Conditions
None
Daily flows:
Little Falls gage flow 2025-12-03: 1739 MGD (2690 cfs)
Little Falls gage flow 2025-12-04: 1810 MGD (est., based on recently available real-time data) (2800 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2025-12-03: 1474 MGD (2280 cfs)
Point of Rocks flow 2025-12-04: 1609 MGD (est., based on recently available real-time data) (2490 cfs)
Yesterday's estimated daily flows:
Great Falls estimated flow 2025-12-03: 1739 MGD (2691 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 (2025-12-03):
Fairfax Water Corbalis withdrawal - Potomac: 78 MGD
WSSC Water Potomac withdrawal: 155 MGD
Washington Aqueduct withdrawal - Great Falls: 113 MGD
Washington Aqueduct withdrawal - Little Falls: 0 MGD
Loudoun Water withdrawal: 10 MGD
Loudoun Water Broad Run discharge: 8 MGD
Total Potomac withdrawal: 357 MGD
Total net Potomac withdrawal: 349 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 2280 cfs
QPR, obs: 2280 cfs
QPR, WS: 0 cfs
Interstate Commission on the Potomac River Basin