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.

Reinitiating CO-OP daily Potomac flow and demand updates (Friday, 2024-11-01)

Submitted by admin1 on Fri, 11/01/2024 - 12:58

Situational Awareness (Friday, 2024-11-01)
ICPRB’s CO-OP Section is reinitiating daily drought monitoring and reporting today because yesterday’s Potomac River mean flow at the US Geological Survey’s stream gage at Point of Rocks, Maryland, fell below 2000 cubic feet per second (cfs), CO-OP’s daily monitoring threshold. According to forecasts by the Middle Atlantic River Forecast Center, no appreciable precipitation is expected in the Potomac basin over the next week.

Daily Potomac flow and demand update (Wednesday, 2024-09-18)

Submitted by admin1 on Wed, 09/18/2024 - 12:02

Situational Awareness (Wednesday, 2024-09-18)
The remnants of Potential Tropical Cyclone Eight is bringing rainfall to Maryland, Virginia, and West Virginia. According to the Middle Atlantic River Forecast Center, the next 24 hours could see 0.7 inches of basin average rain. Over the next 3 days, average basin rainfall is predicted to be around 0.8 inches, with a total of approximately 0.9 inches expected over the week.

Special Conditions
None

Daily Potomac flow and demand update (Tuesday, 2024-09-17)

Submitted by admin1 on Tue, 09/17/2024 - 12:06

Situational Awareness (Tuesday, 2024-09-17)
The forecast from several days ago of significant rainfall never materialized. A small amount of rain is expected in the Potomac basin over the coming days. According to Middle Atlantic River Forecast Center predictions, average basin rainfall will be around 0.5 inches over the next three days and 0.6 inches over the next week.

Special Conditions
None

Daily Potomac flow and demand update (Monday, 2024-09-16)

Submitted by hmoltz on Mon, 09/16/2024 - 12:20

Situational Awareness (Monday, 2024-09-16)
According to the Middle Atlantic River Forecast Center predictions, no rain is expected in the next 24 hours. Over the next 3 days, the average basin rainfall may be around 1.5 inches. The week-long outlook expects a total of approximately 1.8 inches of rain in the basin.

Special Conditions
None

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