Daily Potomac flow and demand update (Tuesday, 2024-11-12)

Situational Awareness (Tuesday, 2024-11-12)
Potomac River flow has steadied in response to the recent rainfall, and a modest amount of rain is again expected in the coming days. According to the Middle Atlantic River Forecast Center, average cumulative precipitation is predicted to be around 0.2 inches over the next three days and 0.3 inches over the next week.

Special Conditions
None

Recent basin-wide average precipitation (above Little Falls):
(based on CO-OP's Low Flow Forecast System analysis of Middle Atlantic River Forecast Center (MARFC) gridded multisensor precipitation estimates)
Yesterday's area-weighted average basin precipitation: 0.23 (inches)
Past 3-day cumulative area-weighted average basin precipitation: 0.44 (inches)
Past 7-day cumulative area-weighted average basin precipitation: 0.46 (inches)

Daily flows:
Little Falls gage flow 2024-11-11: 1228 MGD (1900 cfs)
Little Falls gage flow 2024-11-12: 1144 MGD (est., based on recently available real-time data) (1770 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2024-11-11: 1176 MGD (1820 cfs)
Point of Rocks flow 2024-11-12: 1176 MGD (est., based on recently available real-time data) (1820 cfs)

Yesterday's estimated daily flows:
Great Falls estimated flow 2024-11-11: 1263 MGD (1954 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 (2024-11-11):
Fairfax Water Corbalis withdrawal - Potomac: 92 MGD
WSSC Water Potomac withdrawal: 124 MGD
Washington Aqueduct withdrawal - Great Falls: 84 MGD
Washington Aqueduct withdrawal - Little Falls: 35 MGD
Loudoun Water withdrawal: 10 MGD
Loudoun Water Broad Run discharge: 8 MGD
Total Potomac withdrawal: 345 MGD
Total net Potomac withdrawal: 338 MGD

Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 1820 cfs
QPR, obs: 1820 cfs
QPR, WS: 0 cfs