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 (Saturday, 2024-09-14)

Submitted by admin1 on Sat, 09/14/2024 - 12:08

Situational Awareness (Saturday, 2024-09-14)
According to the Middle Atlantic River Forecast Center predictions, no rain is expected over the next 3 days.  The week-long outlook anticipates approximately 0.7 inches of rainfall across the basin.

Special Conditions
The bathymetric surveys conducted at Potomac Dam No. 4 on September 12th continue to affect river flow at the Point of Rocks gage. River flow is expected to recover over the next day.

Daily Potomac flow and demand update (Friday, 2024-09-13)

Submitted by snummer on Fri, 09/13/2024 - 12:34

Situational Awareness (Friday, 2024-09-13)
According to the Middle Atlantic River Forecast Center predictions, no appreciable rainfall is expected to fall in the basin over the next 3 days. 

Special Conditions
Intra-daily flow fluctuations have been observed at the Shepherdstown and Point of Rocks gages due to bathymetric surveys conducted at Potomac Dam No. 4 on September 12th. 

Daily Potomac flow and demand update (Thursday, 2024-09-12)

Submitted by admin1 on Thu, 09/12/2024 - 12:07

Situational Awareness (Thursday, 2024-09-12)
According to the Middle Atlantic River Forecast Center predictions, the next 24 hours may see 0 inches of rain. Over the next 3 days, the average basin rainfall may be around 0 inches. The week-long outlook expects a total of approximately 0.2 to 0.7 inches of rain in the basin.

Initiation of CO-OP daily drought monitoring and reporting (Wednesday, 2024-09-11)

Submitted by hmoltz on Wed, 09/11/2024 - 12:26

Situational Awareness (Wednesday, 2024-09-11)
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. According to the Middle Atlantic River Forecast Center (MARFC), no rain is expected in the basin over the next week.

Daily Potomac flow and demand update (Tuesday, 2024-08-06)

Submitted by hmoltz on Tue, 08/06/2024 - 12:18

Situational Awareness (Tuesday, 2024-08-06)
According to the Middle Atlantic River Forecast Center predictions, the next 24 hours may see 0.2 inches of rain. Over the next 3 days, the average basin rainfall may be around 0.6 inches. The week-long outlook expects a total of approximately 2.7 inches of rain in the basin.

Special Conditions
None

Daily Potomac flow and demand update (Monday, 2024-08-05)

Submitted by snummer on Mon, 08/05/2024 - 12:50

Situational Awareness (Monday, 2024-08-05)
Minimal amounts of rain fell in the basin over the past 24 hours. The next three days may see about 0.5 inches of rainfall according to the Middle Atlantic River Forecast Center predictions. The week-long outlook expects a total of approximately 3.1 inches of rain in the basin.

Special Conditions
None

Daily Potomac flow and demand update (Sunday, 2024-08-04)

Submitted by hmoltz on Sun, 08/04/2024 - 12:36

Situational Awareness (Sunday, 2024-08-04)
Trace amounts of rainfall are expected in the basin in the next 24 hours.  The next three days may see around 0.3 inches of rainfall according to Middle Atlantic River Forecast Center predictions. The next 7 days may bring over 3 inches of rain to the basin.  

Special Conditions
None

Daily Potomac flow and demand update (Saturday, 2024-08-03)

Submitted by admin1 on Sat, 08/03/2024 - 12:34

Situational Awareness (Saturday, 2024-08-03)
According to the Middle Atlantic River Forecast Center predictions, the next 24 hours may see 0.4 inches of rain. Over the next 3 days, the average basin rainfall may be around 0.7 inches. The week-long outlook expects a total of approximately 1.4 inches of rain in the basin.

Special Conditions

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