Significant precipitation fell over the northwestern half of the basin over the past 24 hours, with accumulations of 1/10 to 1/2 inch, and over an inch in a few areas. The National Weather Service's 72-hour quantitative precipitation forecast (QPF) calls for 1/4 to 1/2 inch in the northwestern portion of the basin over the next few days.
This concludes the 2014 drought exercise. Thank you for participating. Special thanks to those who sent in data, provided us information, and took our phone calls. We will document what we learned about potential impacts of power outages on drought operations in the forthcoming 2014 drought exercise report.
THE FLOWS, DEMANDS, AND DISCHARGES REPORTED BELOW REFLECT ACTUAL CONDITIONS:
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.
SIMULATED SCENARIO: Flow and weather conditions remain unchanged from this morning’s email.
THE FLOWS, DEMANDS, AND DISCHARGES REPORTED BELOW REFLECT ACTUAL CONDITIONS:
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.
Flows are elevated at Little Falls because of the Artificially Varied Flow (AVF) release from Jennings Randolph that occurred on the 27th and 28th of September.
SIMULATED SCENARIO: Flow and weather conditions remain unchanged from this morning’s email.
THE FLOWS, DEMANDS, AND DISCHARGES REPORTED BELOW REFLECT ACTUAL CONDITIONS:
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 0.1 to 1.5 inches of rain fell in the basin in the last 24-hour period. A few small areas of the basin received as much as 1.75 inches of rain in the last 24-hour period. There is 0 to 0.5 inches of rain in the 72-hour forecast. The 7-day forecast indicates accumulations between 0.1 and 1.5 inches of rain possible across the basin.
SIMULATED SCENARIO: The weather forecast and operational recommendations are unchanged from this morning's email. Potomac River flows are still elevated due to the Derecho event. Suppliers have been requested to take advantage of these flows and to conserve reservoir storage. However, we anticipate that flows will begin to fall to near pre-Derecho levels by Sunday.
THE FLOWS, DEMANDS, AND DISCHARGES REPORTED BELOW REFLECT ACTUAL CONDITIONS:
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 no rain fell in the basin in the last 24-hour period. There is a chance of 1/4 to 1/2 an inch of rain in the 24-hour forecast. The 7-day forecast indicates accumulations between 3/4 and 1 inch of rain is possible across the basin.
SIMULATED SCENARIO: Last night's Derecho event continues to impact the area; however, precipitation has ended. Communications are still only available via email. Due to rainfall associated with the event, flows at Little Falls have risen to 570 mgd. WSSC will shut off the release from Little Seneca Reservoir if they can access the dam. Everyone else is proceeding with operational requests to shift back to the Potomac River as much as possible to take advantage of elevated flows.
THE FLOWS, DEMANDS, AND DISCHARGES REPORTED BELOW REFLECT ACTUAL CONDITIONS: