Daily Potomac flow and demand update (Tuesday 2019-10-22)

No rain fell in the basin over the past 24 hours according to the Middle Atlantic River Forecast Center. Over the next 7 days, between 1 and 1.75 inches of rain are expected in the basin.

Flows have been fluctuating around 2000 cfs, the threshold for daily monitoring. Daily monitoring will be continued until flows are consistently above the 2000 cfs threshold.

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 (inches)

Past 3-day cumulative area-weighted average basin precip: 0.44 (inches)

Past 7-day cumulative area-weighted average basin precip: 1.09 (inches)

Daily Flows:

Little Falls gage flow 2019-10-21: 1900 MGD (2940 cfs)

Little Falls gage flow 2019-10-22: 1583 MGD (est., based on recently available real time data) (2450 cfs)

Note: Gage flow at Little Falls is measured after water supply withdrawals.

Point of Rocks flow 2019-10-21: 1390 MGD (2150 cfs)

Point of Rocks flow 2019-10-22: 1415 MGD (est., based on recently available real time data) (2190 cfs)

Yesterday's Net Potomac withdrawal (2019-10-21):

FW Corbalis withdrawal (Potomac): 81 MGD

WSSC Potomac withdrawal: 166 MGD

Aqueduct withdrawal: 137 MGD

Loudoun withdrawal: 10 MGD

Total Potomac withdrawal: 394 MGD