Daily Potomac flow and demand update (Friday, 2026-08-07)
Situational Awareness (Friday, 2026-08-07)
Monitoring Reports
During periods of drought, the Cooperative Water Supply Operations on the Potomac (CO-OP) helps manage the Washington metropolitan area water supply system by coordinating withdrawals from the Potomac River and off-river reservoirs and recommending releases from upstream reservoirs when forecasted flow in the river is not sufficient to meet expected needs. These needs include water demands and an environmental flow-by of 100 million gallons per day (MGD) on the Potomac River at Little Falls dam near Washington, D.C.
Daily Potomac flow and demand update (Thursday, 2026-08-06)
Situational Awareness (Thursday, 2026-08-06)
Rainfall over the past few days has not raised Potomac River flows significantly. The Middle Atlantic River Forecast Center predicts 0.1 to1.0 inches of rain over the next 3 days.
Special Conditions
Daily Potomac flow and demand update (Wednesday, 2026-08-05)
Situational Awareness (Wednesday, 2026-08-05)
According to the Middle Atlantic River Forecast Center predictions, the next 24 hours may see 0.01 to 0.25 inches of rain. Over the next 3 days, the average basin rainfall may be between 0.25 and 1 inch. The week-long outlook expects a total of approximately 0.25 to 1.25 inches of rain in the basin.
Special Conditions
None
Daily Potomac flow and demand update (Tuesday, 2026-08-04)
Situational Awareness (Tuesday, 2026-08-04)
River flow at the USGS Point of Rocks gage remains fairly steady at around 1750 cfs. The past 24 hours saw trace amounts of rainfall, mostly in the southern portions of the basin. According to the Middle Atlantic River Forecast Center predictions, the basin will receive between 0.1 and 0.5 inches of rain over the next 72 hours. The week-long outlook expects a total of approximately 0.5 to 1.0 inches of rain in the basin.
Special Conditions
None
Initiation of daily Potomac flow and demand update (Monday, 2026-08-03)
Situational Awareness (Monday, 2026-08-03)
CO-OP is initiating daily drought monitoring and reporting today because Potomac River flow at the US Geological Survey’s gage at Point of Rocks, Maryland, has fallen below 2000 cubic feet per second (cfs), CO-OP's daily monitoring threshold.
SUSPENDING DAILY DROUGHT MONITORING; Daily Potomac flow and demand update (Thursday, 2026-02-19)
Situational Awareness (Thursday, 2026-02-19)
Daily Potomac flow and demand update (Wednesday, 2026-02-18)
Situational Awareness (Wednesday, 2026-02-18)
According to information from the Middle Atlantic River Forecast Center, no precipitation fell in the Potomac watershed during the past 24 hours. An average accumulation of 0.5 to 1.00 is expected over the next 3 days.
Daily Potomac flow and demand update (Tuesday, 2026-02-17)
Situational Awareness (Tuesday, 2026-02-17)
According to information from the Middle Atlantic River Forecast Center, no precipitation fell in the Potomac watershed during the past 24 hours. An average accumulation of 0.25 to 0.75 is expected over the next 3 days.
Special Conditions
Daily Potomac flow and demand update (Monday, 2026-02-16)
Situational Awareness (Monday, 2026-02-16)
Between 0.1 and 1.0 inches of rain fell in the basin over the past 24 hours, with greater accumulation occurring in southern portions of the basin. According to the Middle Atlantic River Forecast Center, trace amounts of precipitation are expected over the next 3 days. The week-long outlook can expect to see approximately 0.75 inches of precipitation.
Daily Potomac flow and demand update (Sunday, 2026-02-15)
Situational Awareness (Sunday, 2026-02-15)
According to the Middle Atlantic River Forecast Center, no precipitation occurred in the basin over the past 24 hours. Over the next 3 days, 0.1-0.5 inches of precipitation are expected, with the highest amounts likely in the southern portions of the basin.