Lake Manitoba update: July 29, 2018

Calm winds mean we have a good read on the level of Lake Manitoba this morning: it is sitting at 811.385 feet which is as low as the lake was in early 2010. With the declining lake level, outflow at Fairford continues to fall and it is currently 3,885 cfs. With lower inflow, Lake St. Martin continues to fall, and is down to 799.51 feet this week. Last week’s level of Lake Winnipegosis was wind affected – this week the level is higher and probably more accurate: 832.55 feet. The high level of Lake Winnipegosis is keeping flow on the Waterhen River high: it is currently 6,498 cfs. Flow on the Whitefud River is up this week but is still very low at 41 cfs. Flow on the Assiniboine is declining rapidly and is now down to 1,342 cfs at Holland and 1,413 cfs at Headingly. The Shellmouth Reservoir is little changed on the week at 1403.03 feet.

River update
Time: 8:00 AM July 29, 2018
Portage Diversion: closed
Assiniboine at Holland: 1,342 cfs
Assiniboine at Headingly: 1,413 cfs
Waterhen: 6,498 cfs
Whitemud: 41 cfs
Fairford: 3,885 cfs
 
Lake update
Time: 8:00 AM July 29, 2018
Steep Rock: 811.385 ft
Westbourne: 812.385 ft
Mean level Lake Manitoba: 811.385
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 799.51 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 832.55 ft
Shellmouth Reservoir: 1403.03 ft

Lake Manitoba update: July 22, 2018

The theme for this week is down – all lakes and rivers have declining flows and levels. Perhaps most significantly, Lake St. Martin is sitting at 799.70 feet, now comfortably inside its desired operating range (797.00 to 800.00 feet). The last time the level of Lake St. Martin was this low was early 2010. Lake St. Martin has been above its operating range for the best part of a decade. Lake Manitoba is also down this week to 811.36 feet. If that level is accurate, it is the lowest level Lake Manitoba has been since early 2010. We still have a ways to go to reach the low levels seen in 2003, when the lake was just over 810.0 feet.

Lake Winnipegosis is down this week to 832.27 feet, and flow on the Waterhen River is down to 6,357 cfs. Outflow at Fairford is 4,379 cfs and will continue to fall as the lake level falls. The Whitefud River has almost dried up, with flow down to 19 cfs. Flow on the Assiniboine is down to 2,013 cfs at Holland and 2,225 cfs at Headingly. The Shellmouth Reservoir is down this week to to 1402.99 feet.

River update
Time: 7:30 AM July 22, 2018
Portage Diversion: closed
Assiniboine at Holland: 2,013 cfs
Assiniboine at Headingly: 2,225 cfs
Waterhen: 6,357 cfs
Whitemud: 19 cfs
Fairford: ,379 cfs
 
Lake update
Time: 7:30 AM July 22, 2018
Steep Rock: 811.45 ft
Westbourne: 812.27 ft
Mean level Lake Manitoba: 811.36
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 799.70 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 832.27 ft
Shellmouth Reservoir: 1402.99 ft

Lake Manitoba update: July 16, 2018

Strong winds are playing havoc with water levels and river flows, so take this week’s report with more than just a grain of salt. The average gauge reading on Lake Manitoba is currently 811.55 feet. Wind is driving water into the south of Lake Winnipegosis, raising its level (833.76 feet) and flow on the Waterhen River (6851 cfs). Outflow at Fairford is also wind-affected and registering low, at 3,991 cfs. That will rise when the winds subside. The level of Lake St. Martin has reached an historic mark: it is currently 800.00 feet (and is probably below that – the gauge reading is wind-affected). This marks the first time in a very long time that Lake St. Martin has reached the top end of its operating range (800.0 0 feet). I will do a little digging to check the last time that it reached this level and will report back. Flow on the Assiniboine was affected by rain last week and is currently 3,002 cfs at Holland and 2,896 cfs at Headingly. The Shellmouth Reservoir is down this week to to 1403.15 feet.

River update
Time: 9:00 AM July 16, 2018
Portage Diversion: closed
Assiniboine at Holland: 3,002 cfs
Assiniboine at Headingly: 2,896 cfs
Waterhen: 6,851 cfs
Whitemud: 71 cfs
Fairford: 3,991 cfs
 
Lake update
Time: 9:00 AM July 16, 2018
Steep Rock: 811.55 ft
Westbourne: 811.55 ft
Mean level Lake Manitoba: 811.55
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 800.00 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 833.76 ft
Shellmouth Reservoir: 1403.15 ft

Lake Manitoba update: July 8, 2018

Last week’s estimate of the lake level was wind affected and too low. This week’s estimate looks more reliable with the two gauges showing similar readings. The current estimate of the level of Lake Manitoba is 811.81 feet. It appears the lake has risen with the recent rains. Inflow on the Waterhen River remains high at 6,498 cfs. This is well above the long-term average flow of 4,800 cfs for early July. The high continuing high inflow from the Waterhen River (due to a high level of Lake Winnipegosis) is keeping the level of Lake Manitoba from declining further. Outflow at Fairford is 5,898 cfs this morning. Flow on the Whitemud River has dropped to 167 cfs. The level of Lake Winnipegosis is currently 832.82 feet, unchanged from last week. The level of Lake St. Martin is down this week to 800.03 feet. The flow on the Assiniboine continues to fall and is currently 2,779 cfs at Holland and 2,278 cfs at Headingly. The Shellmouth Reservoir is down this week to to 1403.44 feet.

River update
Time: 9:30 AM July 8, 2018
Portage Diversion: closed
Assiniboine at Holland: 2,779 cfs
Assiniboine at Headingly: 2,278 cfs
Waterhen: 6,498 cfs
Whitemud: 167 cfs
Fairford: 5,898 cfs
 
Lake update
Time: 9:30 AM July 8, 2018
Steep Rock: 811.78 ft
Westbourne: 812.84 ft
Mean level Lake Manitoba: 811.81
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 800.03 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 832.84 ft
Shellmouth Reservoir: 1403.44 ft

Lake Manitoba update: July 2, 2018

Strong west winds are shifting water on Lake Manitoba making the estimate of the lake level a bit suspect: the current estimate of the level of Lake Manitoba this morning is 811.49 feet. Inflow on the Waterhen River remains high at 6,533 cfs, while outflow at Fairford has risen to 6,251 cfs. Flow on the Whitemud River rose sharply with the recent rain to 205 cfs. The level of Lake Winnipegosis is currently 832.82 feet, remaining above its long term average level. The level of Lake St. Martin is down this wek to 800.16 feet. The flow on the Assiniboine continues to fall and is currently 2,802 cfs at Holland and 2,684 cfs at Headingly. The Shellmouth Reservoir is down this week to to 1403.74 feet.

River update
Time: 8:30 AM July 2, 2018
Portage Diversion: closed
Assiniboine at Holland: 2,802 cfs
Assiniboine at Headingly: 2,64 cfs
Waterhen: 6,533 cfs
Whitemud: 205 cfs
Fairford: 6,251 cfs
 
Lake update
Time: 8:30 AM July 2, 2018
Steep Rock: 811.71 ft
Westbourne: 812.27 ft
Mean level Lake Manitoba: 811.49
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 800.16 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 832.84 ft
Shellmouth Reservoir: 1403.74 ft