Monitoring Reports

This email reports observed flows and demands as part of ongoing drought operations. A separate email will be provided with today's information for the annual drought exercise.

The National Weather Service reports that rain fell across the entire basin over the last 24 hours. Accumulation totals range from trace amounts to 1.25 inches. There may be an additional accumulation of trace amounts today. The 72-hour forecast indicates the basin may receive between one- and three-quarters of an inch of rain.

The weather conditions and forecasts and operational recommendations remain the same as reported in this morning's email.

THE FLOWS, DEMANDS, AND DISCHARGES REPORTED BELOW REFLECT ACTUAL CONDITIONS:

Daily Potomac flow and demand update (Tuesday 09/30/2014)

Only trace amounts of precipitation fell in the Potomac basin over the past 24 hours. The Middle Atlantic River Forecast Center forecasts accumulations ranging from 0 to 3/4 inches in the basin over the next 72 hours. The National Weather Service's Weather Prediction Center forecasts over an inch of rain in the western portion of the basin over the next 5 days.

The National Weather Service reports that 0 to a 0.25 inch of rain fell across the basin over the last 24 hours. The Middle Atlantic River Forecast Center predicts 0 to a 0.25 inch of rain over the next 72 hours, and the and the National Weather Service predicts 0.1 to 1 inch of rain over the 7 days.

The National Weather Service reports that trace amounts of rain fell in small, isolated areas of the basin over the last 24 hours. Their 48-hour forecast shows no rain in the basin. Trace amounts may fall in the western portion of the basin over the next five days.

A scheduled artificially varied flow release of 1,000 cfs from Jennings Randolph Reservoir began yesterday at 10 am and will end today at 4 pm.

No rain fell in the basin over the past 24 hours according to the National Weather Service. The Middle Atlantic River Forecast Center predicts up to half an inch of rain over the next 72 hours, with the largest amounts expected in the southeastern portions of the basin.

Over the past 24 hours, one quarter to three quarters of an inch of rain fell across much of the basin according to the National Weather Service. The Middle Atlantic River Forecast Center predicts no rainfall in the Potomac basin over the next 72 hours.

It is currently raining in the Potomac basin with 0 to 1 inch of accumulation over the past 24 hours. The Middle Atlantic River Forecast Center predicts 0 to 0.5 an inch of rain over the next 72 hours, and the and the National Weather Service predicts 0 to 0.5 an inch of rain over the 7 days.

Over the last 24 hours up to half an inch of rain fell around and upstream of the metro area. The National Weather Service indicates a chance of rain across the entire basin over the next 24 hours. The western areas can expect between trace amounts and half an inch. The predicted totals increase to the east, with up to 1.25 inches expected in the metro area. There is also a chance of a small amount of additional rain on Thursday.

Over the last 24 hours 0.1 to 0.75 inches of rain fell in the central portion of the basin, with the most falling along the border between Fairfax and Prince William counties. The National Weather Service indicates a chance of rain across the basin beginning Wednesday night through Thursday afternoon. Total rainfall amounts are predicted between 0.1 and 1.0 inch. The heaviest rainfall is forecast in the metro area and areas to the east.