The National Weather Service (NWS) 24 hour observed precipitation shows that there was 0 inches of rain in the Potomac basin above Little Falls. The NWS 3-day forecast predicts accumulations of 0.50 to 1.25 inches of rain over this same area. The NWS Global Ensemble Forecast System simulations predict that flow at Point of Rocks may rise above 2000 cfs, our trigger for daily drought monitoring, sometime this week.
Daily Flows:
Little Falls gage flow 2017-10-22: 1228 MGD (1900 cfs)
Little Falls gage flow 2017-10-23: 1060 MGD (est., based on recently available real time data) (1640 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2017-10-22: 1028 MGD (1590 cfs)
Point of Rocks flow 2017-10-23: 1034 MGD (est., based on recently available real time data) (1600 cfs)
Net Potomac withdrawal (2017-10-22):
FW Corbalis withdrawal (Potomac): 104 MGD
WSSC Potomac withdrawal: 132 MGD
Aqueduct withdrawal: 125 MGD
Total Potomac withdrawal: 361 MGD