Situational Awareness (Saturday, 2025-12-13)
River flows continue to slowly decline. According to information from the Middle Atlantic River Forecast Center, no significant amounts of rain fell in the Potomac watershed during the past 24 hours. An average accumulation of less than 1/4 inch is expected over the next 3 days.
Special Conditions
None
Daily flows:
Little Falls gage flow 2025-12-12: 1202 MGD (1860 cfs)
Little Falls gage flow 2025-12-13: 1170 MGD (est., based on recently available real-time data) (1810 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2025-12-12: 1047 MGD (1620 cfs)
Point of Rocks flow 2025-12-13: 1112 MGD (est., based on recently available real-time data) (1720 cfs)
Yesterday's estimated daily flows:
Great Falls estimated flow 2025-12-12: 1202 MGD (1860 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 (2025-12-12):
Fairfax Water Corbalis withdrawal - Potomac: 80 MGD
WSSC Water Potomac withdrawal: 128 MGD
Washington Aqueduct withdrawal - Great Falls: 129 MGD
Washington Aqueduct withdrawal - Little Falls: 0 MGD
Loudoun Water withdrawal: 12 MGD
Loudoun Water Broad Run discharge: 12 MGD
Total Potomac withdrawal: 349 MGD
Total net Potomac withdrawal: 337 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 1620 cfs
QPR, obs: 1620 cfs
QPR, WS: 0 cfs