Lake Manitoba update: Nov. 29, 2015

The level of Lake Manitoba is little changed from the Tuesday update, sitting this morning at 811.87 feet. Lake St. Martin is dropping rapidly with reduced outflows at Fairford, sitting today at 800.18 feet. This is nearing the top end of its desired operating range of 800.0 feet. Fairford outflow is currently 6,001 cfs; the Waterhen gauge appears to be affected by ice and is reading nearly 10,000 cfs, which is impossible. The Whitemud flow is 138 cfs. Assiniboine flows are starting to be affected by ice and are registering less than 2,000 cfs.

River update
Time: 8:00 AM Nov 29
Portage Diversion: closed
Assiniboine at Holland: 1,483 cfs
Assiniboine at Headingly: 1,906 cfs
Waterhen: ice affected
Whitemud: 138 cfs
Fairford: 6,001 cfs
 
Lake update
Time: 8:00 AM Nov 29
Steep Rock: 811.86 ft
Westbourne: 811.88 ft
Mean level: 811.87 ft
Lake St. Martin: 800.18 ft

Updated lake level: Nov. 24

In my last post, I noted that the gauge numbers looked odd perhaps due to icing or perhaps due to wind effects. That was in fact correct. The numbers yesterday and today have returned to what would be expected.  The mean level of Lake Manitoba at 8:00 AM this morning is 811.89 feet, well above the 811.75 feet reported on Sunday, and just slightly below the level reported last week.  Outflow at Fairford is 5,895 cfs and inflow from the Waterhen River is 3,883 cfs, again closer to what would be expected than what was reported on Sunday.

Lake Manitoba update: Nov. 22, 2015

The gauge readings are looking odd this week – they are too good to be true and I suspect are being affected by the first ice. They are telling us that flow at Fairford has risen dramatically, flow at Waterhen has fallen dramatically and Lake Manitoba has dropped sharply. The level of Lake Manitoba is reading 811.75 feet, down from 811.92 feet last week; outflow at Fairford is 7,590 cfs and inflow from Waterhen is 3,636 cfs and Whitemud is 134 cfs. I don’t believe any of those readings except the Whitemud. Lake St. Martin currently sits at 800.39 feet. Assiniboine flow at Holland and Headingly is dropping.

River update
Time: 8:00 AM Nov 22
Portage Diversion: closed
Assiniboine at Holland: 2,259 cfs
Assiniboine at Headingly: 2,400 cfs
Waterhen: 3,636 cfs
Whitemud: 134 cfs
Fairford: 7,590 cfs
 
Lake update
Time: 8:00 AM Nov 22
Steep Rock: 811.81 ft
Westbourne: 811.68 ft
Mean level: 811.75 ft
Lake St. Martin: 800.39 ft

Lake Manitoba update: Nov. 15, 2015

There has been little change over the last week. The level of Lake Manitoba is nearly identical to last Sunday now sitting at 811.92 feet. Outflow at Fairford (5,401 cfs) is about 400 cfs above the combined inflow from the Waterhen (4,871 cfs) and Whitemud Rivers (191 cfs), so the lake level will not fall substantially in the near future. Lake St. Martin currently sits at 800.48 feet. Assiniboine flow at Holland and Headingly is rising now sitting near 2,500 cfs.

River update
Time: 9:00 AM Nov 15
Portage Diversion: closed
Assiniboine at Holland: 2,552 cfs
Assiniboine at Headingly: 2,595 cfs
Waterhen: 4,871 cfs
Whitemud: 191 cfs
Fairford: 5,401 cfs
 
Lake update
Time: 9:00 AM Nov 15
Steep Rock: 811.89 ft
Westbourne: 811.94 ft
Mean level: 811.92 ft
Lake St. Martin: 800.48 ft

Lake Manitoba update: Nov 8, 2015

Lake Manitoba dropped slightly over the last week and now sits at 811.91 feet. Outflow at Fairford (5,472 cfs) is currently less than 500 cfs above the inflow from the Waterhen (4,836 cfs) and Whitemud Rivers (177 cfs), so the lake level will not decline substantially in the near future. (A 500 cfs outflow will drop the lake level 0.3 inches in a month.) With any precipitation, the lake will go up. With lower Fairford flows, Lake St. Martin is now dropping and currently sits at 800.59 feet. Assiniboine flow at Holland rose slightly over the last week to 2,312 cfs. Part of this rise appears to be due to a gauge calibration that occurred midweek.

River update
Time: 8:00 AM Nov 8
Portage Diversion: closed
Assiniboine at Holland: 2,312 cfs
Assiniboine at Headingly: 2,153 cfs
Waterhen: 4,836 cfs
Whitemud: 177 cfs
Fairford: 5,472 cfs
 
Lake update
Time: 8:00 AM Nov 8
Steep Rock: 811.81 ft
Westbourne: 812.01 ft
Mean level: 811.91 ft
Lake St. Martin: 800.59 ft

Lake Manitoba update: November 1, 2015

Lake Manitoba is rising again. The lake now sits just under 812.0 feet (811.97 ft). The rise can be attributed to the MIT reduction of outflow at Fairford on election day. Outflow at Fairford (5,754 cfs) now roughly matches inflow from the Waterhen (5,048 cfs) and Whitemud Rivers (194 cfs), so the lake rises when it rains.

Lake St. Martin currently sits at 800.79 feet. Assiniboine flow at Holland also rose over the last week with the rain to 2,206 cfs.

River update
Time: 8:30 AM November 1
Portage Diversion: closed
Assiniboine at Holland: 2,206 cfs
Assiniboine at Headingly: 1,913 cfs
Waterhen: 5,048 cfs
Whitemud: 194 cfs
Fairford: 5,754 cfs
 
Lake update
Time: 8:30 AM November 1
Steep Rock: 811.89 ft
Westbourne: 812.04 ft
Mean level: 811.97 ft
Lake St. Martin: 800.79 ft