The Potomac basin received no significant rainfall over the past 24 hours and NWS forecasts indicate that no rain is expected over the next three days. However, the longer term forecast predicts accumulations of 1/2 to 1 inch of rain in the basin over the next five days.
Flows in the basin have been holding relatively steady. Scattered thunderstorms occurred throughout the basin over the past 24 hours and the NWS's Meteorological Model-based Ensemble Forecast System (MMEFS) predicts that flows in the Potomac River will rise slightly over the next several days. Little precipitation is expected in the basin during the next three days.
The Middle Atlantic River Forecast Center's 24-hour accumulated precipitation map is showing that scattered areas in the basin received 0 to 1.2 inches of rain yesterday. The 3-day forecast show an accumulation between 0.1 and 0.5 is possible, with the higher amounts likely to the central area of the basin. National Weather Service ensemble river forecast for the next four days calls for rising flows at Point of Rocks.
MARFC's 24-hour accumulated precipitation map is showing that scattered areas in the basin received 0.1 to 1.75 inches of rain yesterday. The 3-day forecast shows an accumulation between 0.1 and 0.75 is possible, with the higher amounts likely to the southwest.
The USGS visited the Point of Rocks gage yesterday to verify the rating curve. Flow was measured as slightly less than what the gage was reporting.
The Middle Atlantic River Forecast Center reports that the basin received a negligible amount of rain over the past 24 hours. Accumulations of 0.10 to 0.5 inches of rain is expected over the next 2 days.
The Middle Atlantic River Forecast Center reports that the basin received little rain over the past 24 hours. Accumulations of zero to 0.5 inches are forecast for the next three days, with most of the rain expected to fall in the western portion of the basin.
Flow at the Point of Rocks gage fell below the 2,000 cfs threshold on Friday. Daily monitoring begins today. For more information on ICPRB's drought monitoring visit http://tinyurl.com/oda5aqp.
The Middle Atlantic River Forecast Center reports that the majority of the basin received a negligible amount of rain over the past 24 hours; very limited areas received 0.5 to 2 inches. Little to no rain is expected over the next 2 days.
Daily flow and demand monitoring is discontinued now that flow at the Point of Rocks gage has risen well above 2,000 cfs.
Thank you to everyone who provided daily reports.
Point of Rocks flow is currently at 4,140 cfs and is above the low flow threshold of 2,000 cfs. Bear with us while we wait to see if Point of Rocks flow remains above the low-flow threshold of 2,000 cfs.
The National Weather Service reports that yesterday between 0.5 and 2.0 inches of rain fell over the basin. The 72-hour forecast shows between 0.1 and 0.25 inches of rain may fall in the basin. The 7-day forecast shows that between 0.1 and 0.6 inches of rain may fall in the basin.
During the past 24 hours the western half of the basin received 1 to 2 inches of rain. More rain is on the way, with forecasted accumulations of 1 to 2 inches across the basin over the next two days. Given the forecast and recent rainfall, we expect that mean daily flow at Point of Rocks will soon rise above the trigger for daily drought monitoring of 2000 cfs.