Situational Awareness (Saturday, 2025-11-01)
According to the Middle Atlantic River Forecast Center, only trace amounts of rain are expected in the Potomac watershed over the next 3 days and no appreciable accumulations are expected over the next 10 days. River flow at the USGS’s Point of Rocks gage is currently above 2000 cfs, CO-OP’s threshold for Daily Drought Monitoring, but flow is predicted to fall below 2000 cfs in a few days.
Special Conditions
None
Daily flows:
Little Falls gage flow 2025-10-31: 1674 MGD (2590 cfs)
Little Falls gage flow 2025-11-01: 1551 MGD (est., based on recently available real-time data) (2400 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2025-10-31: 1499 MGD (2320 cfs)
Point of Rocks flow 2025-11-01: 1829 MGD (est., based on recently available real-time data) (2830 cfs)
Yesterday's estimated daily flows:
Great Falls estimated flow 2025-10-31: 1674 MGD (2590 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 (2025-10-31):
Fairfax Water Corbalis withdrawal - Potomac: 91 MGD
WSSC Water Potomac withdrawal: 146 MGD
Washington Aqueduct withdrawal - Great Falls: 122 MGD
Washington Aqueduct withdrawal - Little Falls: 0 MGD
Loudoun Water withdrawal: 11 MGD
Loudoun Water Broad Run discharge: 8 MGD
Total Potomac withdrawal: 369 MGD
Total net Potomac withdrawal: 362 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 2320 cfs
QPR, obs: 2320 cfs
QPR, WS: 0 cfs