If weather and water supply conditions are near average, lakes are expected to decline in November by six cm
The gate setting of the Compensating Works at the head of the St. Marys Rapids will be lowered in November to a setting equivalent to approximately one gate fully open, according to a news release from the International Lake Superior Board of Control.
If weather and water supply conditions are near average, both Lake Superior and Lake Michigan-Huron are expected to decline in November by six cm and five cm , respectively). The lakes are currently in their seasonal decline.Update on Lake Superior Outflows and Expected Conditions - November 2023 After the gate adjustments on Monday, Nov. 6 and Tuesday, Nov. 7 , the St. Marys Rapids flow will be approximately 150 m3/s.
The Board expects the total St. Marys River flow in November to be 2,300 m3/s , as prescribed by Regulation Plan 2012. Actual hour-to-hour and day-to-day flows may vary depending on hydrologic conditions, as well as variations in flow from the hydropower plants. Water level changes over the month of October Water supply conditions were very dry in the Lake Superior basin and very wet in the Lake Michigan-Huron basin in October.
Water levels as of the beginning of November Forecast outlook Both Lakes Superior and Michigan-Huron are in their seasonal decline.