Current Lake Manitoba level now under 812 feet

Now that the winds have calmed it is possible to get a reasonable estimate of the level of Lake Manitoba. We have reached something of a milestone. As of 10:00 AM this morning (Sept. 29), the mean level of Lake Manitoba is now below 812.0 feet by the thinnest of margins – it is currently 811.99 feet. This is the lowest the lake has been during the open water season since June 2010 (it was slightly lower under the ice at the end of winter in both 2013 and 2014).

SF

Lake Manitoba update: September 27, 2015

The wind is making it difficult to get a level for Lake Manitoba as both the Steep Rock and Westbourne gauges have been fluctuating widely over the last couple of days: I’ll update the level when the winds calm. I have posted the current gauge readings but have little confidence in the numbers. Based on the dry weather over the last week I suspect the real level of Lake Manitoba is now at or just below 812.0 feet. Outflow at Fairford is 8,649 cfs, while inflow from Waterhen is currently 4,907 cfs. The flows at both Fairford and Waterhen have been strongly affected by the wind the last couple of days as lake levels bounce up and down. Whitemud flow remains low at 163 cfs. Flows on the Assiniboine continue to drop, with the Holland gauge reading 1,994 cfs and the Headingly gauge 2,136 cfs. The gauge at Lake St. Martin is currently offline.

River update
Time: 9:00 AM September 27
Portage Diversion: closed
Assiniboine at Holland: 1,994 cfs
Assiniboine at Headingly: 2,136 cfs
Waterhen: 4,907 cfs
Whitemud: 163 cfs
Fairford: 8,649 cfs
 
Lake update
Time: 9:00 AM September 27
Steep Rock: 812.20 ft
Westbourne: 812.01 ft
Mean level: 812.11 ft
Lake St. Martin: no data

Lake Manitoba update: September 20, 2015

It has been another good week for Lake Manitoba. The lake level is now down to 812.09 feet, and should be under 812.0 feet in the next couple of weeks if the dry weather holds. Outflow at Fairford outflow is 8,860 cfs, about 4,000 cfs more than the inflow from Waterhen that is currently 4,730 cfs. Whitemud flow is slightly above last week to 191 cfs, but is still very low. Flow on the Assiniboine at Holland fell this week to 2,189 cfs. Lake St. Martin has started to drop, and now sits at 801.18 feet.

River update
Time: 7:00 PM September 20
Portage Diversion: closed
Assiniboine at Holland: 2,189 cfs
Assiniboine at Headingly: 2,506 cfs
Waterhen: 4,730 cfs
Whitemud: 191 cfs
Fairford: 8,860 cfs
 
Lake update
Time: 7:00 PM September 20
Steep Rock: 812.24 ft
Westbourne: 811.94 ft
Mean level: 812.09 ft
Lake St. Martin: 801.18 ft

Lake Manitoba update: September 13, 2015

The dry weather means another good week for Lake Manitoba. I used the gauge readings from 6:00 AM this morning when the winds were calm to get a better estimate of its real level – this afternoon the strong winds shifting in direction caused the gauge readings to become erratic. This morning, the lake was sitting at 812.14 feet or about 0.13 feet below last week’s level. This afternoon, Fairford outflow was 7,766 cfs. Inflow from the Waterhen River was 5,330 cfs. Both Fairford and Waterhen flows appear to be wind affected. Whitemud flow remains low at 154 cfs. Flow on the Assiniboine at Holland rose slightly this week to 2,471 cfs. Lake St. Martin remains above its flood level of 801 feet, and continues to rise slowly, currently sitting at 801.45 feet.

River update
Time: 7:00 PM September 13
Portage Diversion: closed
Assiniboine at Holland: 2,471 cfs
Assiniboine at Headingly: 2,189 cfs
Waterhen: 5,330 cfs
Whitemud: 154 cfs
Fairford: 7,766 cfs
 
Lake update
Time: 7:00 PM September 13
Steep Rock: 812.24 ft @ 6:00 AM
Westbourne: 812.04 ft @ 6:00 AM
Mean level: 812.14 ft
Lake St. Martin: 801.45 ft

Lake Manitoba update: September 6, 2015

It has been another good week for Lake Manitoba. The lake continues its decline and has now fallen to 812.27 feet. Fairford outflows are now 8119 cfs, about 3,000 cfs more than inflow from the Waterhen River (=5048 cfs). Whitemud flow remains negligible at 134 cfs. Flows on the Assiniboine also remain low at just over 2000 cfs. Lake St. Martin remains above its flood level of 801 feet, having risen to 801.41 feet this week.

River update
Time: 9:00 AM September 6
Portage Diversion: closed
Assiniboine at Holland: 2,152 cfs
Assiniboine at Headingly: 2,372 cfs
Waterhen: 5,048 cfs
Whitemud: 134 cfs
Fairford: 8,119 cfs
 
Lake update
Time: 9:00 AM September 6
Steep Rock: 812.20 ft
Westbourne: 812.34 ft
Mean level: 812.27 ft
Lake St. Martin: 801.41 ft