Situational Awareness (Tuesday, 2024-11-05)
Dry conditions continue throughout the Potomac River watershed, but a bit a relief is on the horizon. According to Middle Atlantic River Forecast Center predictions, approximately 0.3 inches of rain is expected 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 (inches)
Past 3-day cumulative area-weighted average basin precipitation: 0 (inches)
Past 7-day cumulative area-weighted average basin precipitation: 0 (inches)
Daily flows:
Little Falls gage flow 2024-11-04: 1209 MGD (1870 cfs)
Little Falls gage flow 2024-11-05: 1170 MGD (est., based on recently available real-time data) (1810 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2024-11-04: 1215 MGD (1880 cfs)
Point of Rocks flow 2024-11-05: 1163 MGD (est., based on recently available real-time data) (1800 cfs)
Yesterday's estimated daily flows:
Great Falls estimated flow 2024-11-04: 1258 MGD (1947 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 (2024-11-04):
Fairfax Water Corbalis withdrawal - Potomac: 101 MGD
WSSC Water Potomac withdrawal: 118 MGD
Washington Aqueduct withdrawal - Great Falls: 75 MGD
Washington Aqueduct withdrawal - Little Falls: 49 MGD
Loudoun Water withdrawal: 10 MGD
Loudoun Water Broad Run discharge: 8 MGD
Total Potomac withdrawal: 353 MGD
Total net Potomac withdrawal: 345 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 1880 cfs
QPR, obs: 1880 cfs
QPR, WS: 0 cfs
Interstate Commission on the Potomac River Basin