Thanks Scott for the most recent update that follows.
Lake Manitoba update: April 27, 2024
The spring freshet is underway and lake levels and river flows are average to below average for this time of year. Recent heavy rains resulted in the Portage Diversion being opened for a short period of time, reaching a peak flow of about 11,000 cfs that was diverted into Lake Manitoba from the Assiniboine River. The effect on the lake level, however, was minor, raising the lake level less than an inch. The opening of the Diversion is almost certainly unrelated to the recent ice damage near Twin Beaches: that is the result of melting lake ice and strong winds from the wrong direction at the wrong time. The level of Lake Manitoba is currently ~811.35 feet, slightly higher (~0.1 feet) than the level at the beginning of winter, and is still in the lower half of its desired operating range (today’s readings are affected by strong winds and overestimating the current lake level). Outflow at Fairford is modest at 2,250 cfs, which is still low for this time of year. The level of Lake St. Martin is has risen slightly from November to 798.89 feet, still well inside its desired operating range. Flow on the Dauphin River is 3637 cfs. Flow on the Waterhen River is 2,295 cfs, very close to the average flow for this time of year. The level of Lake Winnipegosis is currently 830.58 feet, right at its average level for the end of April. Flow on the Whitemud River is currently 399 cfs and falling. Flow on the Assiniboine is 9,924 cfs at Holland and 9,535 cfs at Headingly. The province is raising the level of the Shellmouth Reservoir: the current level of the reservoir is 1398.33 feet.
Lake update
Time: April 27, 2024
Steep Rock: 811.37 ft
Westbourne: 811.84 ft
Mean level Lake Manitoba: 811.60 ft (wind affected)
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 798.89 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 830.58 ft
Shellmouth Reservoir: 1,398.33 ft
River update
Time: April 27 2024
Portage Diversion: closed
Assiniboine at Holland: 9,924 cfs
Assiniboine at Headingly: 9,535 cfs
Waterhen: 2,295 cfs
Whitemud: 399 cfs
Fairford: 2,250 cfs
Dauphin: 3,637 cfs
Extracted from the Environment and Climate Change Canada Real-time Hydrometric Data web site (https://wateroffice.ec.gc.ca/map/index_e.html) on April 27, 2024.