Little precipitation is expected in the Potomac basin over the next several days according to National Weather Service forecasts.
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 (inches)
Past 3-day cumulative area-weighted average basin precipitation: 0 (inches)
Past 7-day cumulative area-weighted average basin precipitation: 0.32 (inches)
Daily flows:
Little Falls gage flow 2023-09-03: 500 MGD (774 cfs)
Little Falls gage flow 2023-09-04: 394 MGD (est., based on recently available real-time data) (610 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2023-09-03: 717 MGD (1110 cfs)
Point of Rocks flow 2023-09-04: 717 MGD (est., based on recently available real-time data) (1110 cfs)
Yesterday's Washington metropolitan area Potomac River withdrawals and discharges (2023-09-03):
Fairfax Water Corbalis withdrawal - Potomac: 131 MGD
WSSC Water Potomac withdrawal: 132 MGD
Washington Aqueduct withdrawal - Great Falls: 67 MGD
Washington Aqueduct withdrawal - Little Falls: 72 MGD
Loudoun Water withdrawal: 5 MGD
Loudoun Water Broad Run discharge: 4 MGD
Total Potomac withdrawal: 407 MGD
Total net Potomac withdrawal: 402 MGD
Yesterday's Patuxent, Occoquan, and Net Total System Withdrawal (2023-09-03):
FW Occoquan withdrawal: 72 MGD
WSSC Patuxent withdrawal: 50 MGD
Yesterday's total system withdrawal (2023-09-03): 524 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 1110 cfs
QPR, obs: 1110 cfs
QPR, WS: 0 cfs