Lake Manitoba update: July 23, 2017

For the first time this summer, there is a noticeable drop in the level of Lake Manitoba. The current level of the Lake is 813.25 feet, down 0.15 feet from last week. A small portion of the drop is attributable to outflow on the Fairford River (currently 12,184 cfs) exceeding inflow from the Waterhen River (10,877 cfs), but most of the drop is due to evaporation. Lake St. Martin is higher on the week, back up to 803.31 feet. It remains above flood level.

The level of Lake Winnipegosis has been oscillating with the wind and is up this week to 834.25 feet This caused the flow on the Waterhen River to rise from last week. Lake Winnipegosis remains more than 3 feet above its average level for this time of year, but that is not new. It has been above its average level, often well above, for more than a decade. It is currently just (4″) below the maximum level ever observed for this time of year.

Flow on the Whitemud River has almost ceased, registering just 85 cfs. Flow on the Assiniboine continues to fall, now just 1,141 cfs at Holland and 1,201 cfs at Headingly.

River update
Time: 7:00 AM July 23, 2017
Portage Diversion: closed
Assiniboine at Holland: 1,141 cfs
Assiniboine at Headingly: 1,201 cfs
Waterhen: 10,877 cfs
Whitemud: 85 cfs
Fairford: 12,184 cfs
Lake update
Time: 7:00 AM July 23, 2017
Steep Rock: 813.34 ft
Westbourne: 813.16 ft
Mean level Lake Manitoba: 813.25 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 803.31 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 834.25 ft
Shellmouth Reservoir: 1403.12 ft


One thought on “Lake Manitoba update: July 23, 2017

  1. is this all they do is report the water level how about the ecoli count or algae in the water what crap is floating in the lake give more details of what’s important to everyday people


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