There was no significant rainfall in the Potomac River basin over the past 24 hours. National Weather Service forecasts predict 1/10 of an inch of rain over the next 48 hours in portions of the Potomac basin. The Mid-Atlantic River Forecasting Center quantitative precipitation forecasts (qpfs) indicate that the entire basin will receive amounts between 1 and 1.75 inches over the next 5 days. The U. S. Geological Survey observed flows suggest that flow at Little Falls will hold steady for the next couple of days. However, our flow predictions indicate that flow at Little Falls will then begin falling again.
Daily Flows:
Little Falls gage flow 08/08: 920 MGD (1420 cfs)
Little Falls gage flow 08/09: 890 MGD (est., based on recently available real time data) (1370 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 08/08: 950 MGD (1470 cfs)
Point of Rocks flow 08/09: 970 MGD (est., based on recently available real time data) (1500 cfs)
Net Potomac Production (08/08/10):
FW Corbalis raw water withdrawal (Potomac): 116 MGD
WSSC Potomac Production: 152 MGD
Aqueduct withdrawal: 149 MGD
Total Potomac demand: 417 MGD