Lake of the Woods and Lac Seul have been hit hard this year with decreasing water levels.
The current level of the Lake of the Woods is 322.75 m (1058.9 ft), which is equal to a 30th percentile (per cent of distribution that is equal to or below it) which is considered normal for this time of the year. This past week the lake water level has fallen by 1cm (½ in), and is still expected to drop further by 1 to 3 cm ( 1 in) over the next week.
This time last month the Lake of the Woods was at a 50th percentile.
Lake of Woods authorized outflow will have been gradually reduced by 10 m3/s per day since yesterday June 1, 2021, until the outflow reached 200 m3/S next week.
The reduction will cause the Winnipeg River immediately below the Norman Dam to drop by a total of 15 cm (6 in) over this period. This will also cause locations downstream to drop by 5 to 10 cm (2 to 4 in).
The level at Minaki will not be affected by these flow changes.
Lac Seul on the other hand has seen a significant decrease for this time of the year but is on the uprise. The current water level of Lac Seul is 355.09 m (1165.0 ft), which turns into a 15th percentile (per cent of distribution that is equal to or below its level) for this time of the year, which is considered to be below normal.
The water has risen 8cm (3 in) over the past week and is expected to keep rising by 3 to 7 cm (1 to 3 in) over the next week. The average daily inflow is estimated to be 200 m3/S over the next 7 days.
Lac Seul authorized outflow is 100 m3/S.
The Lake of the Woods Control Board manages the waters of Lake of the Woods, Lac Seul, and the Winnipeg and English Rivers between the outlets of these lakes and their junction. It was formed in 1919 and operates under Canadian federal and provincial legislation and a Canada-United States Treaty. The Lake of the Woods Control Board serves vastly diverse interests in the basin and tries to produce conditions that are reasonably acceptable to all.