According to the Middle Atlantic River Forecast Center, little precipitation fell in the basin over the past 24 hours, and little is expected for the next three days.
The US Army Corps of Engineers made a whitewater recreational release from Savage Reservoir yesterday (Saturday, Sep 28). The release of approximately 1000 cfs occurred from 10 AM to 4 PM. The release is now passing Cumberland, Maryland, and the hydrograph at the USGS's flow monitoring station at Cumberland can be viewed at https://waterdata.usgs.gov/md/nwis/uv/?site_no=01603000&PARAmeter_cd=00…. We expect to see elevated flows from this release at Point of Rocks and Little Falls later this week.
REVISION 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: 0.01747 (inches)
Past 3-day cumulative area-weighted average basin precip: 0.04429 (inches)
Past 7-day cumulative area-weighted average basin precip: 0.08249 (inches)
Daily Flows:
Little Falls gage flow 2019-09-28: 1034 MGD (1600 cfs)
Little Falls gage flow 2019-09-29: 1008 MGD (est., based on recently available real time data) (1560 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2019-09-28: 1086 MGD (1680 cfs)
Point of Rocks flow 2019-09-29: 1047 MGD (est., based on recently available real time data) (1620 cfs)
Yesterday's Net Potomac withdrawal (2019-09-28):
FW Corbalis withdrawal (Potomac): 119 MGD
WSSC Potomac withdrawal: 151 MGD
Aqueduct withdrawal: 156 MGD
Loudoun withdrawal: 10 MGD
Total Potomac withdrawal: 436 MGD