The National Weather Service (NWS) 24 hour observed precipitation shows that there were scattered, trace amounts of rain in the Potomac basin above Little Falls. The NWS 3-day forecast predicts 0 to 0.5 inches of rain in this same area with the largest amounts expected in the western portions of the basin. The National Weather Service (NWS) 5-day forecast predicts accumulations of up to 1.75 inches of rain in the Potomac basin. Although flows at the US Geological Survey gage at Point of Rocks is currently above 2,000 cfs, our trigger for daily monitoring, we will continue daily monitoring efforts until we see that flows have significantly improved for several days.
Daily Flows:
Little Falls gage flow 2017-10-25: 1512 MGD (2340 cfs)
Little Falls gage flow 2017-10-26: 1428 MGD (est., based on recently available real time data) (2210 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2017-10-25: 1228 MGD (1900 cfs)
Point of Rocks flow 2017-10-26: 1461 MGD (est., based on recently available real time data) (2260 cfs)
Net Potomac withdrawal (2017-10-25):
FW Corbalis withdrawal (Potomac): 85 MGD
WSSC Potomac withdrawal: 125 MGD
Aqueduct withdrawal: 130 MGD
Total Potomac withdrawal: 340 MGD