According to Middle Atlantic River Forecast Center estimates, 0 to 0.50 inches of rain fell in the basin in the past 24 hours. The CO-OP's Low Flow Forecast System reports that this precipitation amounts to a basin-wide average of 0.37 inches for yesterday. Between 0.10 and 0.50 inches of rain is forecast over the next 7 days.
The USGS gage at Point of Rocks is currently above 2000 cfs, our trigger for daily monitoring. We will continue daily monitoring efforts until we see that flows have significantly improved for several days.
Recent basin-wide average precipitation (above Little Falls):
(based on CO-OP's Low Flow Forecast System analysis of Middle Atlantic River Forecast Center (MARFC) gridded multisensor precipitation estimates)
Yesterday's area-weighted average basin precip: 0.37 (inches)
Past 3-day cumulative area-weighted average basin precip: 1.04 (inches)
Past 7-day cumulative area-weighted average basin precip: 1.07 (inches)
Daily Flows:
Little Falls gage flow 2019-10-08: 1105 MGD (1710 cfs)
Little Falls gage flow 2019-10-09: 1170 MGD (est., based on recently available real time data) (1810 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2019-10-08: 1299 MGD (2010 cfs)
Point of Rocks flow 2019-10-09: 1461 MGD (est., based on recently available real time data) (2260 cfs)
Yesterday's Net Potomac withdrawal (2019-10-08):
FW Corbalis withdrawal (Potomac): 92 MGD
WSSC Potomac withdrawal: 138 MGD
Aqueduct withdrawal: 160 MGD
Loudoun withdrawal: 10 MGD
Total Potomac withdrawal: 400 MGD