Potomac River flow at Little Falls has been steadily dropping over the past several days, as the effect of the recent local storms recedes. Over the past 24 hours, watersheds in the northern-most portion of the Potomac basin received between a 1/10 and 1/2 inches of rain, and a slight uptick in flows can be observed in streams in the Potomac North Branch sub-basin. The Middle Atlantic River Forecast Center predicts that showers and thunderstorms from a passing cold front will result in accumulations of between 1/10 and 1/4 inches of rain in most of the basin over the next 48 hours.
Daily Flows:
Little Falls gage flow 08/21: 1110 MGD (1710 cfs)
Little Falls gage flow 08/22: 970 MGD (est., based on recently
available real time data) (1500 cfs)
Note: Gage flow at Little Falls is measured after water
supply withdrawals.
Point of Rocks flow 08/21: 1040 MGD (1610 cfs)
Point of Rocks flow 08/22: 1060 MGD (est., based on recently
available real time data) (1640 cfs)
Net Potomac Production (08/21/10):
FW Corbalis raw water withdrawal (Potomac): 110 MGD
WSSC Potomac Production: 139 MGD
Aqueduct withdrawal: 167 MGD
Total Potomac demand: 416 MGD