Situational Awareness (Tuesday, 2025-10-14)
Potomac River flows are holding relatively steady. According to information provided by the Middle Atlantic River Forecast Center, the Potomac watershed received a small amount of rainfall over the past 24 hours - 1/100 to 1/10 of an inch in most areas in the northern portion of the watershed and little or no rain in the southern portion. No rain is forecast for the watershed over the next 3 days.
Special Conditions
None
Daily flows:
Little Falls gage flow 2025-10-13: 1099 MGD (1700 cfs)
Little Falls gage flow 2025-10-14: 1086 MGD (est., based on recently available real-time data) (1680 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2025-10-13: 1163 MGD (1800 cfs)
Point of Rocks flow 2025-10-14: 1234 MGD (est., based on recently available real-time data) (1910 cfs)
Yesterday's estimated daily flows:
Great Falls estimated flow 2025-10-13: 1099 MGD (1700 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 (2025-10-13):
Fairfax Water Corbalis withdrawal - Potomac: 101 MGD
WSSC Water Potomac withdrawal: 145 MGD
Washington Aqueduct withdrawal - Great Falls: 37 MGD
Washington Aqueduct withdrawal - Little Falls: 0 MGD
Loudoun Water withdrawal: 11 MGD
Loudoun Water Broad Run discharge: 6 MGD
Total Potomac withdrawal: 294 MGD
Total net Potomac withdrawal: 288 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 1800 cfs
QPR, obs: 1800 cfs
QPR, WS: 0 cfs
Interstate Commission on the Potomac River Basin