Lake Manitoba update: Oct. 16, 2017

Lake Manitoba appears to be down from last week with current estimate of the level of Lake Manitoba is 812.43 feet. If that is true, then the lake is back inside its operating range. There are some odd gauge readings, however, that are not matching up with the prevailing winds. The level at Steep Rock is currently falling, but winds are from the southwest, so the Steep Rock gauge should be rising. Thus the estimate of lake level should be viewed with some suspicion. Fairford flows are down to 8,582 cfs, as are flows on the Waterhen (7,487 cfs). The estimate of the level of Lake Winnipegosis is down this week to 832.45 feet. The level of Lake St. Martin is almost unchanged this week at 801.74 feet. The Whitemud River is now running at 109 cfs. Flow on the Assiniboine is 833 cfs at Holland; the gauge at Headingly is currently offline.

River update
Time: 4:30 PM October 16, 2017
Portage Diversion: closed
Assiniboine at Holland: 833 cfs
Assiniboine at Headingly: gauge offline
Waterhen: 7,487 cfs
Whitemud: 109 cfs
Fairford: 8,582 cfs
 
Lake update
Time: 4:30 PM October 16, 2017
Steep Rock: 812.47 ft
Westbourne: 812.40 ft
Mean level Lake Manitoba: 812.43 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 801.74
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 832.45 ft
Shellmouth Reservoir: 1400.26 ft

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Lake Manitoba update: Oct. 8, 2017

Strong winds continue to make estimating lake levels difficult. The current estimate of the level of Lake Manitoba is 812.56 feet. Strong west winds are pushing water eastward and outflow at Fairford has risen sharply as a result, being 10,065 cfs this afternoon. Flow through Fairford was restored this week after MI temporarily reduced flows last week. Inflow to Lake Manitoba from the Waterhen River is high at 8,122 cfs. This is more than double the long-term average flow for the Waterhen River for this date. Waterhen flows remain high because Lake Winnipegosis remains high, currently sitting at 833.33 feet, about 3 feet above its average level for this time of year. The level of Lake St. Martin is down slightly this week to 801.80 feet. The Whitemud River is now running at 85 cfs. Flow on the Assiniboine is 826 cfs at Holland and 1,052 cfs at Headingly.

River update
Time: 6:00 PM October 8, 2017
Portage Diversion: closed
Assiniboine at Holland: 826 cfs
Assiniboine at Headingly: 1,052 cfs
Waterhen: 8,122 cfs
Whitemud: 85 cfs
Fairford: 10,065 cfs
 
Lake update
Time: 6:00 PM October 8, 2017
Steep Rock: 812.80 ft
Westbourne: 812.34 ft
Mean level Lake Manitoba: 812.56 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 801.80
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 833.33 ft
Shellmouth Reservoir: 1400.84 ft

Lake Manitoba update: Oct. 1, 2017

Strong winds have been buffeting the lakes making estimates of levels subject to error. The current estimate of the level of Lake Manitoba is 812.59 feet, down from last week. Outflow at Fairford is 7,557 cfs this while inflow from the Waterhen is 7,593 cfs. MI lowered outflow at Fairford this week to take instrument readings and to inspect the water control structure. They appear to be in the process of raising them back to normal (and maximal) levels now, after dropping flows markedly midweek. Lake Winnipegosis is down this week to 832.68 feet. With the reduced outflows at Fairford, the level of Lake St. Martin has dropped markedly to 801.87 feet. The Whitemud River is now running at 102 cfs. Flow on the Assiniboine is 855 cfs at Holland and 1,218 cfs at Headingly.

River update
Time: 9:00 AM October 1, 2017
Portage Diversion: closed
Assiniboine at Holland: 855 cfs
Assiniboine at Headingly: 1,218 cfs
Waterhen: 7,593 cfs
Whitemud: 102 cfs
Fairford: 7,557 cfs
 
Lake update
Time: 9:00 AM October 1, 2017
Steep Rock: 812.78 ft
Westbourne: 812.40 ft
Mean level Lake Manitoba: 812.59 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 801.87
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 832.68 ft
Shellmouth Reservoir: 1401.12 ft

Lake Manitoba update: Sept. 24, 2017

Heavy rains this week have arrested the decline in the level of Lake Manitoba. The lake has risen to 812.76 feet, more than a quarter foot above the top end of the operating range. Outflow at Fairford is 9,111 cfs this while inflow from the Waterhen is 8,264 cfs. Flow on the Waterhen remains more than double its average for this time of year. That is because the level of Lake Winnipegosis remains above its long term average level, currently sitting at 833.23 feet: that is 2.6 feet above its long term mean level. The level of Lake St. Martin is unchanged this week at 802.30 feet. The Whitemud River is springing back to life in the rain and flow on it has risen to 85 cfs. Flow on the Assiniboine is also rising and is now 989 cfs at Holland and 1,165 cfs at Headingly.

River update
Time: 9:00 AM September 24, 2017
Portage Diversion: closed
Assiniboine at Holland: 989 cfs
Assiniboine at Headingly: 1,165 cfs
Waterhen: 8,264 cfs
Whitemud: 85 cfs
Fairford: 9,111 cfs
 
Lake update
Time: 9:00 AM September 24, 2017
Steep Rock: 812.57 ft
Westbourne: 812.96 ft
Mean level Lake Manitoba: 812.76 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 802.30
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 833.23 ft
Shellmouth Reservoir: 1401.61 ft

Lake Manitoba update: Sept. 18, 2017

Strong winds have been causing fluctuating water levels on the lakes, making estimates subject to error. The current level of Lake Manitoba is 812.63 feet, still above the top end of the operating range (812.5 feet). Outflow at Fairford is 8,370 cfs this morning, only slightly higher than inflow from the Waterhen at 7,928 cfs. Flow on the Waterhen remains more than double its average for this time of year. That is because the level of Lake Winnipegosis remains well above its long term average level, currently sitting at 833.07 feet: that level is 2.4 feet above its long term mean. Lake St. Martin continues to drop and is now sitting at 802.3 feet. Flow on the Assiniboine is currently 706 cfs at Headingly.

River update
Time: 8:00 AM September 18, 2017
Portage Diversion: closed
Assiniboine at Holland: gauge offline
Assiniboine at Headingly: 706 cfs
Waterhen: 7,928 cfs
Whitemud: 25 cfs
Fairford: 8,370 cfs
 
Lake update
Time: 8:00 AM September 18, 2017
Steep Rock: 812.43 ft
Westbourne: 812.83 ft
Mean level Lake Manitoba: 812.63 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 802.30
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 833.07 ft
Shellmouth Reservoir: 1401.90 ft