In the past 24 hours, trace amounts of precipitation were measured
across the basin. Limited areas in the northern portion received up to
0.75 inches. The 48-hour forecast shows no precipitation over most of
the basin, though there is a chance of trace amounts east of the
Monocacy River. The 5-day forecast indicates the basin may receive
between 0.5 to 1.0 inches of accumulated precipitation.
The western portion of the basin received between 0.01 and 0.25 inches of rain yesterday. The forecast for the next 48 hours indicates a chance of 0.25 to 0.75 of an inch of rain across the basin. The 5-day forecast shows a chance of 0.50 to 1.50 inches of accumulated precipitation.
Most of the basin received between 0.10 and 0.50 inches of rain
yesterday. The forecast for the next 48 hours indicates a chance of up
to 0.25 inches of rain across the majority of the basin. The western
portion may receive up to 0.50 inches. The 5-day forecast shows a
chance of 0.25 to 0.50 inches of accumulated precipitation.
Over the past 24 hours there has been significant precipitation in parts of the Potomac basin, with 1/4 of an inch to over 1 inch falling in most areas. The Middle Atlantic Forecast Center predicts between 0.25 and 0.50 inches of accumulation over the next five days.
Minor precipitation events have kept flows relatively steady over the past 5 days. The Middle Atlantic River Forecast Center (MARFC) quantitative precipitation forecast indicates that over 1/2 inch of rain will fall throughout the basin over the next 48 hours. MARFC's new ensemble forecasts, available at www.erh.noaa.gov/mmefs/, indicate that flow at Point of Rocks has a good chance of rising above 2000 cfs sometime in the next 7 days.
Isolated portions of the basin received approximately a half inch of
rain over the past 24 hours. There is a chance the western portion of
the basin could receive between 0.5 and 1.0 inch of rain over the next
48 hours. The National Weather Service (NWS) quantitative
precipitation forecasts (qpf) predict up to 0.5 inches of rain across
the basin over the next 5-day period.
Yesterday's scattered showers produced between a 0.01 to a 0.25 of an inch of rain for parts of the basin. Similar scattered showers are expected for today. The 48-hour forecast shows a chance of up to a 0.25 of an inch of rain across the basin. The National Weather Service (NWS) quantitative precipitation forecasts (qpf) indicates the basin could receive accumulated rainfall between 0.5 and 1.25 inches over the next 5 days.
Scattered showers producing less than 0.10 inches of rain occurred in
limited parts of the basin yesterday. The 48-hour forecast shows a
chance of up to 0.50 inches of rain across the basin. The National
Weather Service (NWS) quantitative precipitation forecasts (qpf)
indicates the basin could receive accumulated rainfall between 0.75
and 1.50 inches over the next 5 days.
Potomac River flows have been steadily decreasing. Current flows at Point of Rocks are at 1890 cfs. National Weather Service (NWS) quantitative precipitation forecasts (qpf) indicate that an accumulation of approximately 0.5 inch of rain is likely for most of the basin over the next 5 days. Some areas have slightly higher or lower qpf totals.
The basin received no rain over the past 24-hour period and is not expected to receive rain over the next 5-day period. However, given the higher flows, lower demands, and lower temperatures, we are discontinuing daily reporting on conditions. A summary of the weekend demands are included below.