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 (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

Daily Potomac flow and demand update (Friday, 2024-08-02)

Submitted by admin1 on Fri, 08/02/2024 - 12:52

Situational Awareness (Friday, 2024-08-02)
Scattered rainfall occurred over the Potomac basin yesterday. Potomac River flow at the USGS’s Point of Rocks gage briefly rose above 2000 cfs yesterday, CO-OP’s trigger for Drought Monitoring, but is now again below that level, National Weather Service forecasts call for heavy rainfall to the east of the basin over the next week. The 7-day cumulative basin-wide precipitation average above the Little Falls gage is predicted to be 0.9 inches.

Daily Potomac flow and demand update (Thursday, 2024-08-01)

Submitted by snummer on Thu, 08/01/2024 - 12:23

Situational Awareness (Thursday, 2024-08-01)
Trace amounts of rainfall fell in the basin over the past 24 hours. According to the Middle Atlantic River Forecast Center predictions, the next 24 hours may see about 0.8 inches of rain. The week-long outlook expects a total of approximately 1.3 inches of rain in the basin.

Special Conditions
None

Daily Potomac flow and demand update (Wednesday, 2024-07-31)

Submitted by snummer on Wed, 07/31/2024 - 12:21

Situational Awareness (Wednesday, 2024-07-31)
Over the past 24 hours the basin has received approximately 0.25 inches of rain. According to the Middle Atlantic River Forecast Center predictions, the next 3 days may see 0.3 inches of rain.  The week-long outlook expects a total of approximately 1.2 inches of rain in the basin.

Special Conditions
None

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