Daily Potomac flow and demand update (Tuesday, 2022-11-08)

Submitted by admin1 on Tue, 11/08/2022 - 13:08

There was no precipitation in the Potomac basin yesterday and none is forecast for the next three days. However, it looks like relief is on the way - there is a good chance of heavy rain late this week from subtropical storm Nicole.

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 precipitation: 0 (inches)
Past 3-day cumulative area-weighted average basin precipitation: 0.08 (inches)
Past 7-day cumulative area-weighted average basin precipitation: 0.12 (inches)

Daily flows:
Little Falls gage flow 2022-11-07: 1241 MGD (1920 cfs)
Little Falls gage flow 2022-11-08: 1209 MGD (est., based on recently available real-time data) (1870 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2022-11-07: 1222 MGD (1890 cfs)
Point of Rocks flow 2022-11-08: 1234 MGD (est., based on recently available real-time data) (1910 cfs)

Yesterday's Washington metropolitan area Potomac River withdrawals and discharges (2022-11-07):
Fairfax Water Corbalis withdrawal (Potomac): 77 MGD
WSSC Water Potomac withdrawal: 133 MGD
Washington Aqueduct withdrawal: 115 MGD
Loudoun Water withdrawal: 14 MGD
Loudoun Water Broad Run discharge: 6 MGD
Total Potomac withdrawal: 338 MGD
Total net Potomac withdrawal: 333 MGD

Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 1890 cfs
QPR, obs: 1890 cfs
QPR, WS: 0 cfs

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