Monitoring Reports

No rain fell in the basin yesterday. MARFC indicates a chance of between 0.01 and 0.10 inches on Saturday in the far western portion of the basin.

Daily Flows:
Little Falls gage flow 09/17: 1220 MGD (1880 cfs)
Little Falls gage flow 09/18: 1090 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 09/17: 1230 MGD (1910 cfs)
Point of Rocks flow 09/18: 1200 MGD (est., based on recently available real time data) (1860 cfs)

According to the Middle Atlantic River Forecast Center (MARFC), no rainfall was recorded in the Potomac basin over the past 24 hours. MARFC does not predict any rainfall over the next 3 days.

(SIMULATED) Daily Flows:
Little Falls gage flow 09/15/15: 210 MGD (320 cfs)
Little Falls gage flow 09/16/15: 310 MGD (est., based on most
recently available real time data) (473 cfs)
Note: Gage flow at Little Falls is measured after water
supply withdrawals.
Point of Rocks flow 09/15/15: 610 MGD (940 cfs)
Point of Rocks flow 09/16/15: 570 MGD (est., based on recently
available real time data) (880 cfs)

According to the Middle Atlantic River Forecast Center (MARFC), no rain fell in the Potomac basin over the past 24 hours and no rain is forecast over the next three days. Though flow at Point of Rocks is currently above CO-OP's low-flow monitoring threshold of 2000 cfs, flow is expected to fall back below this level sometime in the next couple of days.

A small area in the southwestern portion of the basin saw between 0.1 and 0.25 inches of rain over the past 24 hours. MARFC is not predicting any rain until this weekend.

Daily Flows:
Little Falls gage flow 09/13: 1410 MGD (2180 cfs)
Little Falls gage flow 09/14: 1460 MGD (est., based on recently available real time data) (2260 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 09/13: 1320 MGD (2040 cfs)
Point of Rocks flow 09/14: 1290 MGD (est., based on recently available real time data) (2000 cfs)

The vast majority of the basin saw some amount of rainfall yesterday, ranging from 0.1 to 1 inch in most areas. Isolated areas received up to 1.5 inches. MARFC's current forecast predicts no rain in the basin over the next three days. Flow at Point of Rocks is expected to drop back below 2,000 cfs in the next day or two.

The Middle Atlantic River Forecast Center reports that areas in the central portion of the basin received up to 1.25 inches of rain in the past 24 hours.The 72-hour forecast calls for accumulation between 0.25 and 1.25 inches, with the greater amounts to the northwest.

Most of the basin received 0.1 to 0.5 an inch of rain over the last 24 hours, with localized areas receiving over an inch. No rain is expected today except trace amounts in the far western portion of the basin. Widespread precipitation is expected across the basin on Saturday and Sunday. MARFC predicts 0.5 to 2 inches of rain over the next 3 days with heaviest amounts in the northwest portion of the basin.

Much of the basin received 0.1 to 0.5 inches of rain over the last 24 hours. A small area in the far western portion of the basin received up to 1.0 inch. Today, between 0.25 and 1.25 inches may fall across the basin. There is another chance for rain on Saturday. MARFC is showing accumulations between 0.50 and 1.50 inches, with the larger amounts to the northwest.

According to National Weather Service Multisensor Precipitation Estimates (MPE), essentially no rain fell in the basin during the past 24 hours. Relief from the dry conditions may be on the way however; quantitative precipitation forecasts predict approximately 3/4 inches over the basin in the next 3 days and 1.5 to 2.5 inches in the next 5 days.