Over the last 24 hours, no precipitation has been recorded in the basin. No significant rainfall is expected over the next 72 hours.
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: 0.04 (inches)
Past 7-day cumulative area-weighted average basin precipitation: 0.44 (inches)
Daily flows:
Little Falls gage flow 2023-08-20: 750 MGD (1160 cfs)
Little Falls gage flow 2023-08-21: 711 MGD (est., based on recently available real-time data) (1100 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2023-08-20: 911 MGD (1410 cfs)
Point of Rocks flow 2023-08-21: 879 MGD (est., based on recently available real-time data) (1360 cfs)
Yesterday's Washington metropolitan area Potomac River withdrawals and discharges (2023-08-20):
Fairfax Water Corbalis withdrawal (Potomac): 115 MGD
WSSC Water Potomac withdrawal: 133 MGD
Washington Aqueduct withdrawal: 127 MGD
Loudoun Water withdrawal: 6 MGD
Loudoun Water Broad Run discharge: 5 MGD
Total Potomac withdrawal: 381 MGD
Total net Potomac withdrawal: 376 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 1410 cfs
QPR, obs: 1410 cfs
QPR, WS: 0 cfs
Note to Loudoun Water: See NWS ensemble flow forecasts (HEFS, GEFS, NAEFS) for Point of Rocks flow for the next 7 days – see https://www.weather.gov/erh/mmefs_marfc?id=PORM2&model=NAEFS.