According to the Middle Atlantic River Forecast Center's observed precipitation, there was 0.01 to 0.25 inches of precipitation above the Point of Rocks streamflow gage over the last 24 hours. The National Weather Service (NWS) 3-day forecast predicts accumulations of 0.75 to 1.75 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 2017-10-07: 866 MGD (1340 cfs)
Little Falls gage flow 2017-10-08: 814 MGD (est., based on recently available real time data) (1260 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2017-10-07: 918 MGD (1420 cfs)
Point of Rocks flow 2017-10-08: 860 MGD (est., based on recently available real time data) (1330 cfs)
Net Potomac withdrawal (2017-10-07):
FW Corbalis withdrawal (Potomac): 104 MGD
WSSC Potomac withdrawal: 136 MGD
Aqueduct withdrawal: 146 MGD
Total Potomac withdrawal: 386 MGD