Situational Awareness (Saturday, 2026-02-07)
According to information from the Middle Atlantic River Forecast Center, there was light precipitation in the Potomac watershed above Little Falls yesterday, ranging from 0.01 to 0.10 inches water equivalent in most areas. No precipitation is in the forecast for the next 3 days.
Special Conditions
Flow data at Point of Rocks and Little Falls are currently unavailable due to the presence of ice. For more information about ice effects on streams, see Water-Supply Paper 2175: Measurement and Computation of Streamflow: Volume 2. Computation of Discharge pages 360-376 (WSP 2175). Potomac River flow values for Loudoun Water’s drought operations protocol were estimated based on information from the MARFC’s River Observations and Forecasts webpages.
Daily flows:
Little Falls gage flow 2026-02-06: Not available due to ice.
Little Falls gage flow 2026-02-07: Not available due to ice.
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2026-02-06: Not available due to ice.
Point of Rocks flow 2026-02-07: Not available due to ice.
Yesterday's estimated daily flows:
Great Falls estimated flow 2026-02-06: Not available due to ice.
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 (2026-02-06):
Fairfax Water Corbalis withdrawal - Potomac: 87 MGD
WSSC Water Potomac withdrawal: 149 MGD
Washington Aqueduct withdrawal - Great Falls: 139 MGD
Washington Aqueduct withdrawal - Little Falls: 0 MGD
Loudoun Water withdrawal: 8 MGD
Loudoun Water Broad Run discharge: 9 MGD
Total Potomac withdrawal: 382 MGD
Total net Potomac withdrawal: 373 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: > 1400 cfs*
QPR, obs: > 1400 cfs*
QPR, WS: 0 cfs
* Estimated from the MARFC’s River Observations and Forecasts webpages.