According to Middle Atlantic River Forecast Center estimates, 0 to 1.50 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 0.55271 inches for yesterday. Between 0 and 0.25 inches of rain is forecast over the next 7 days.
The USGS gage at Point of Rocks temporarily rose above 2000 cfs due to the recent precipitation. However, flows have already begun to drop below 2000 cfs.
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: 0.55271 (inches)
Past 3-day cumulative area-weighted average basin precip: 0.662 (inches)
Past 7-day cumulative area-weighted average basin precip: 0.70053 (inches)
Daily Flows:
Little Falls gage flow 2019-10-07: 1079 MGD (1670 cfs)
Little Falls gage flow 2019-10-08: 1086 MGD (est., based on recently available real time data) (1680 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2019-10-07: 1215 MGD (1880 cfs)
Point of Rocks flow 2019-10-08: 1293 MGD (est., based on recently available real time data) (2000 cfs)
Yesterday's Net Potomac withdrawal (2019-10-07):
FW Corbalis withdrawal (Potomac): 112 MGD
WSSC Potomac withdrawal: 143 MGD
Aqueduct withdrawal: 149 MGD
Loudoun withdrawal: 10 MGD
Total Potomac withdrawal: 414 MGD