The National Weather Service (NWS) 3-day forecast predicts accumulations of 1 1/4 to 2 inches of rain in the Potomac basin above Little Falls. The NWS Global Ensemble Forecast System simulations predict that flow at Point of Rocks will rise above 2000 cfs, our trigger for daily drought monitoring, over the coming week.
Daily Flows:
Little Falls gage flow 2017-10-06: 918 MGD (1420 cfs)
Little Falls gage flow 2017-10-07: 860 MGD (est., based on recently available real time data) (1330 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2017-10-06: 892 MGD (1380 cfs)
Point of Rocks flow 2017-10-07: 879 MGD (est., based on recently available real time data) (1360 cfs)
Net Potomac withdrawal (2017-10-06):
FW Corbalis withdrawal (Potomac): 109 MGD
WSSC Potomac withdrawal: 143 MGD
Aqueduct withdrawal: 157 MGD
Total Potomac withdrawal: 409 MGD