Monitoring Reports

The National Weather Service (NWS) reports that there was no precipitation in the Potomac basin over the last 24 hours. The NWS 3-day forecast predicts 1.25 to 2.0 inches of rain in the portion of the basin above Little Falls dam. Although flows at the US Geological Survey gage at Point of Rocks is currently above 2,000 cfs, our trigger for daily monitoring, we will continue daily monitoring efforts until we see that flows have significantly improved for several days.

The National Weather Service (NWS) 24 hour observed precipitation shows that there were scattered, trace amounts of rain in the Potomac basin above Little Falls. The NWS 3-day forecast predicts 0.75 to 1.5 inches of rain in this same area. The National Weather Service (NWS) 5-day forecast predicts accumulations of up to 2.5 inches of rain in the Potomac basin.

The National Weather Service (NWS) 24 hour observed precipitation shows that there were scattered, trace amounts of rain in the Potomac basin above Little Falls. The NWS 3-day forecast predicts 0 to 0.5 inches of rain in this same area with the largest amounts expected in the western portions of the basin. The National Weather Service (NWS) 5-day forecast predicts accumulations of up to 1.75 inches of rain in the Potomac basin.

The National Weather Service (NWS) 24 hour observed precipitation shows that there was 0.00 to 0.50 inches of rain in the Potomac basin above Little Falls. The NWS 3-day forecast predicts no rain over the majority of this same area. The US Geological Survey shows that Point of Rocks flow fell below and then rose above 2,000 cfs, our trigger for daily monitoring. We will continue daily monitoring efforts until we see that flows have significantly improved for several days.

The National Weather Service (NWS) 24 hour observed precipitation shows that there was 0.01 to 1.25 inches of rain in the Potomac basin above Little Falls. The NWS 3-day forecast predicts accumulations of 0.25 to 1.50 inches of rain over this same area. The US Geological Survey shows that Point of Rocks flow rose above 2,000 cfs, our trigger for daily monitoring. We will continue daily monitoring efforts until we see that flows have significantly improved for several days.

The National Weather Service (NWS) 24 hour observed precipitation shows that there was 0 inches of rain in the Potomac basin above Little Falls. The NWS 3-day forecast predicts accumulations of 0.50 to 1.25 inches of rain over this same area. The NWS Global Ensemble Forecast System simulations predict that flow at Point of Rocks may rise above 2000 cfs, our trigger for daily drought monitoring, sometime this week.

No rain fell in the basin over the past 24 hours. The National Weather Service (NWS) 3-day forecast predicts accumulations of 0.5 to 1 inch of rain across the basin. The NWS 5-day forecast predicts accumulations of up to 1.75 inches of rain in the Potomac basin.

Daily Flows:
Little Falls gage flow 2017-10-21: 1280 MGD (1980 cfs)
Little Falls gage flow 2017-10-22: 1170 MGD (est., based on recently available real time data) (1810 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.

No rain fell in the basin over the past 24 hours. Flow at Point of Rocks is currently at about 1900 cfs. The National Weather Service (NWS) 3-day forecast predicts accumulations of 0.01 to 0.10 inches in the western part of the Potomac basin. The NWS 5-day forecast predicts accumulations of up to 1.25 inches of rain in the Potomac basin.

Flow at Point of Rocks is currently at about 2000 cfs, CO-OP's trigger for daily drought monitoring. No rain fell in the basin over the past 24 hours, and no rain is expected over the next 72 hours, according to the Middle Atlantic River Forecast Center's quantitative precipitation forecasts. The National Weather Service (NWS) 5-day forecast predicts accumulations of up to 1.25 inches of rain in the Potomac basin.

Point of Rocks flow is at 3110 cfs. Within the last 24 hours, the Potomac basin has received up to 0.1 inches of precipitation. The National Weather Service (NWS) 3-day forecast predicts accumulations of 0.25 inches of rain in the Potomac basin above Little Falls.

With rain continuing to fall across much of the basin, and Point of Rocks flow being above the low flow monitoring threshold of 2,000 cfs, daily monitoring will be discontinued until further notice. Thank you to all for your contribution to the monitoring efforts.