Lake Manitoba update: Sept. 10, 2017

Strong winds are playing havoc with the gauges on the lakes right now, and are also affecting river flows into an out of Lake Manitoba. The current estimate of the level of Lake Manitoba is 812.53 feet, but that number is at best approximate. South winds are pushing water into the north basin of the lake, and that raises outflow at Fairford which is currently 10,241 cfs. Lake Winnipegosis is currently 832.58 feet and that level is also wind affected. Flow on the Waterhen River is down to 7,662 cfs. The gauge on Lake St. Martin is currently offline. Flow on the Assiniboine is down to a trickle, being 537 cfs at Holland; and 999 cfs at Headingly.

River update
Time: 8:00 PM September 10, 2017
Portage Diversion: closed
Assiniboine at Holland: 537 cfs
Assiniboine at Headingly: 999 cfs
Waterhen: 7,663 cfs
Whitemud: 17 cfs
Fairford: 10,241 cfs
 
Lake update
Time: 8:00 PM September 10, 2017
Steep Rock: 812.80 ft
Westbourne: 812.27 ft
Mean level Lake Manitoba: 812.53 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: gauge offline
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 832.58 ft
Shellmouth Reservoir: 1402.43 ft

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Lake Manitoba update: Sept. 6, 2017

The hydrometric gauges are back online after a prolonged outage. The dry weather continues and levels and flows continue to fall. Lake Manitoba has fallen to 812.66 feet and is now approaching the top end of its operating range (812.5 feet). Outflow at Fairford has fallen with the lake level, currently registering 8,935 cfs. Lake Winnipegosis fell to 833.23 feet and flow on the Waterhen River is down to 8,476 cfs. Lake St. Martin fell further this week and now sits at 802.56 feet. Flow on the Assiniboine is  533 cfs at Holland; there is an odd gauge reading at Headingly (1,031 cfs). That may be a gauge error

River update
Time: 7:30 AM September 6, 2017
Portage Diversion: closed
Assiniboine at Holland: 533 cfs
Assiniboine at Headingly: 1,031 cfs
Waterhen: 8,476 cfs
Whitemud: gauge offline
Fairford: 8,935 cfs
 
Lake update
Time: 7:30 AM September 6, 2017
Steep Rock: 812.50 ft
Westbourne: 812.83 ft
Mean level Lake Manitoba: 812.66 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 802.56 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 833.23 ft
Shellmouth Reservoir: 1402.53 ft

High Wind Warning Issued: Wave heights of 5 feet or more

Manitoba Infrastructure’s Hydrologic Forecasting Centre reports that forecast high winds developing over the next 24 hours to 48 hours have resulted in a high wind warning effect for the South Basin of Lake Manitoba and Lake Winnipeg.

Strong northwest winds are forecast starting tomorrow afternoon. Wind speed and wave action could raise levels by as much as five feet or more. Lake Manitoba is currently at 812.80 ft.

Property owners are advised to take precautions. 

Click here to read province issued warning

Click here to read CBC article

Lake Manitoba update: Aug. 27, 2017

Another dry week sees lakes and rivers all declining in level and flow. Lake Manitoba is now well below 813.0 feet, sitting at 812.87 feet this morning. Outflow at Fairford is down slightly to 10,771 cfs. Lake Winnipegosis fell to 833.30 feet and flow on the Waterhen River is down to 8,935 cfs. Lake St. Martin fell further this week and now sits at 802.72 feet. Flow on the Assiniboine is now a trickle, being 562 cfs at Holland and 583 cfs at Headingly.

River update
Time: 9:00 AM August 27, 2017
Portage Diversion: closed
Assiniboine at Holland: 562 cfs
Assiniboine at Headingly: 583 cfs
Waterhen: 8,935 cfs
Whitemud: gauge offline
Fairford: 10,771 cfs
 
Lake update
Time: 9:00 AM August 27, 2017
Steep Rock: 813.01 ft
Westbourne: 812.73 ft
Mean level Lake Manitoba: 812.87 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 802.72 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 833.37 ft
Shellmouth Reservoir: 1403.03 ft

Lake Manitoba update: August 20, 2017

Lake Manitoba has been sloshing around in the high winds this weekend making the current estimate of lake level somewhat uncertain. But the numbers suggest that the lake is down from last week and now below 813.0 feet, currently registering 812.96 feet. Outflow at Fairford is down slightly to 10,877 cfs. Lake Winnipegosis fell to 833.79 feet and flow on the Waterhen River is also down to 9,358 cfs. Lake St. Martin fell further this week and now sits at 802.84 feet. Flow on the Assiniboine also fell even further to 600 cfs at Holland; the gauge at Headingly is currently malfunctioning. A gauge recalibration has resulted in a higher estimate this week for the level of the Shellmouth Reservoir.

River update
Time: 7:30 PM August 20, 2017
Portage Diversion: closed
Assiniboine at Holland: 600 cfs
Assiniboine at Headingly: gauge malfunction
Waterhen: 9,358 cfs
Whitemud: 24 cfs
Fairford: 10,877 cfs
 
Lake update
Time: 7:30 PM August 20, 2017
Steep Rock: 813.02 ft
Westbourne: 812.89 ft
Mean level Lake Manitoba: 812.96 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 802.84 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 833.79 ft
Shellmouth Reservoir: 1402.95 ft

Lake Manitoba update: Aug. 13, 2017

This has been a week of little change. The level of Lake Manitoba is almost unchanged at 813.09 feet. Outflow on the Fairford River is down slightly to 11,124 cfs. Lake Winnipegosis is unchanged at 833.92 feet. Flow on the Waterhen River is down slightly to 9,782 cfs. Lake St. Martin fell this week to 802.95 feet and is now below flood level. Flow on the Assiniboine fell even further to 650 cfs at Holland and 759 cfs at Headingly.

River update
Time: 6:00 PM August 13, 2017
Portage Diversion: closed
Assiniboine at Holland: 650 cfs
Assiniboine at Headingly: 759 cfs
Waterhen: 9,782 cfs
Whitemud: 39 cfs
Fairford: 11,124 cfs
 
Lake update
Time: 6:00 PM August 13, 2017
Steep Rock: 813.09 ft
Westbourne: 813.09 ft
Mean level Lake Manitoba: 813.09 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 802.95 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 833.92 ft
Shellmouth Reservoir: 1394.69 ft