This email concludes CO-OP's 2015 Washington Metropolitan Area Drought Exercise. Experience gained during our annual drought exercises helps maintain our region's preparedness to reliably supply water even in the face of serious drought. We would like to thank everyone who participated in the exercise for your assistance, insights, patience, and hard work.
National Weather Service forecasts indicates that the basin will have no relief from the dry weather over the next week. Potomac River flow at Point of Rocks is now close to its 25th percentile level for this day of the year.
The daily flow and demand update was inadvertently not sent out yesterday. Yesterday's reported demand values appear at the end of today's report.
DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Monday 09/28/2017) - DROUGHT EXERCISE
Daily Flows (simulated):
Little Falls gage flow 09/27: 140 MGD (210 cfs)
Point of Rocks gage flow 09/27: 390 MGD (610 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Little Falls gage flow 09/28: 140 MGD (210 cfs)
Point of Rocks gage flow 09/28: 400 MGD (620 cfs)
DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Sunday 09/27/2017) - DROUGHT EXERCISE
Daily Flows (simulated):
Little Falls gage flow 09/26: 190 MGD (300 cfs)
Point of Rocks gage flow 09/26: 420 MGD (650 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Little Falls gage flow 09/27: 120 MGD (180 cfs)
Point of Rocks gage flow 09/27: 400 MGD (630 cfs)
Forecasts indicate that dry conditions will continue for at least the next 7 days.
Daily Flows:
Little Falls gage flow 2017-09-26: 969 MGD (1500 cfs)
Little Falls gage flow 2017-09-27: 982 MGD (est., based on recently available real time data) (1520 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2017-09-26: 1079 MGD (1670 cfs)
Point of Rocks flow 2017-09-27: 1034 MGD (est., based on recently available real time data) (1600 cfs)
DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Saturday 09/26/2017) - DROUGHT EXERCISE
Daily Flows (simulated):
Little Falls gage flow 09/25: 180 MGD (280 cfs)
Point of Rocks gage flow 09/25: 380 MGD (590 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Little Falls gage flow 09/26: 130 MGD (190 cfs)
Point of Rocks gage flow 09/26: 370 MGD (580 cfs)
Dry conditions are expected to continue over the next week.
Daily Flows:
Little Falls gage flow 2017-09-25: 1021 MGD (1580 cfs)
Little Falls gage flow 2017-09-26: 957 MGD (est., based on recently available real time data) (1480 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2017-09-25: 1028 MGD (1590 cfs)
Point of Rocks flow 2017-09-26: 1125 MGD (est., based on recently available real time data) (1740 cfs)
DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Friday 09/25/2017) - DROUGHT EXERCISE
Daily Flows (simulated):
Little Falls gage flow 09/24: 130 MGD (210 cfs)
Point of Rocks gage flow 09/24: 550 MGD (850 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Little Falls gage flow 09/25: 120 MGD (186 cfs)
Point of Rocks gage flow 09/25: 440 MGD (681 cfs)
Potomac basin stream flows continue to fall. The 7-day forecast indicates that dry conditions will persist.
Daily Flows:
Little Falls gage flow 2017-09-24: 1138 MGD (1760 cfs)
Little Falls gage flow 2017-09-25: 1034 MGD (est., based on recently available real time data) (1600 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2017-09-24: 1021 MGD (1580 cfs)
Point of Rocks flow 2017-09-25: 1021 MGD (est., based on recently available real time data) (1580 cfs)
Daily Flows (simulated):
Little Falls gage flow 09/23: 230 MGD (360 cfs)
Point of Rocks gage flow 09/23: 590 MGD (920 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Little Falls gage flow 09/24: 250 MGD (380 cfs)
Point of Rocks gage flow 09/24: 730 MGD (1130 cfs)
Today's estimated demand (09/24/17) P.M.:
WSSC P.M. estimated demand: 190 MGD
FW P.M. estimated demand: 185 MGD
Aqueduct P.M. estimated demand: 150 MGD
Total P.M. estimated demand: 525 MGD