There was no rainfall in the Potomac River Basin over the past 24 hours. National Weather Service forecasts predict accumulations of 1/10 to 1/4 inches 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 1.5 inches over the next 5 days. USGS real-time data show a steep drop in flow at Little Falls this morning. However, our flow prediction tools indicate that this drop should be temporary, since flows at Point of Rocks and upstream tributaries have held relatively steady over the past several days.
Daily Flows:
Little Falls gage flow 08/09: 860 MGD (1330 cfs)
Little Falls gage flow 08/10: 640 MGD (est., based on recently available real time data) (987 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 08/09: 980 MGD (1510 cfs)
Point of Rocks flow 08/10: 1060 MGD (est., based on recently available real time data) (1640 cfs)
Net Potomac Production (08/09/10):
FW Corbalis raw water withdrawal (Potomac): 139 MGD
WSSC Potomac Production: 176 MGD
Aqueduct withdrawal: 167 MGD
Total Potomac demand: 482 MGD