Lake Manitoba update: Dec. 24, 2016

The update is a day earlier for obvious reasons.

The gauge on the Waterhen is still ice-affected but it is pretty clear now that inflow and outflow to Lake Manitoba are roughly in balance as the lake level remains almost unchanged for a second week in a row. Given that outflow from Fairford is currently 8,225 cfs, inflow from the Waterhen is most likely about the same. The Whitemud River has nearly stopped flowing and now registers just 71 cfs.

The level of Lake Manitoba is 812.48 feet this week, just below the top end of its operating range. The level of Lake St. Martin is 801.65 feet, up slightly from last week. Lake Winnipegosis rose slightly this week to 833.91 feet, and remains about 6 inches above its highest previously recorded level for this time of year. The level of the Shellmouth Reservoir continues to fall rapidly, dropping more than a foot over the last week. It is now sitting at 1401.0 feet.

Flow on the Assiniboine is currently reading 6,036 cfs at Holland and 5,013 cfs at Headingly. Flow on the Assiniboine is high for this time of year largely because of the high outflow from the Shellmouth Reservoir, but I am not sure the flow is actually as high as the gauges are reading.

River update
Time: 9:00 AM December 24, 2016
Portage Diversion: closed
Assiniboine at Holland: 6,036 cfs
Assiniboine at Headingly: 5,013 cfs
Waterhen: ice affected
Whitemud: 71 cfs
Fairford: 8,225 cfs
 
Lake update
Time: 9:00 AM December 24, 2016
Steep Rock: 812.40 ft
Westbourne: 812.57 ft
Mean level: 812.48 ft
Lake St. Martin: 801.65 ft
Lake Winnipegosis: 833.91 ft

Lake Manitoba update: Dec. 18, 2017

Ice cover is now building on the lakes and as a result we are now getting good estimates of the levels for them, the rivers not so much.

The gauge on the Waterhen is ice-affected and we do not right now know the real flow on the river – it is somewhere in the range of 7,000 to 9,000 cfs (probably closer to the lower number) and the flow will fall as ice forms on the river. The provincial website is reporting a flow of 19,257 cfs on the Waterhen for 16 December. That is the raw gauge reading and is incorrect, so do not be unduly alarmed. If that number was true, Lake Manitoba would be rising rapidly and it is not.

The level of Lake Manitoba is 812.47 feet, almost identical to last week. Outflow on the Fairford River remains high which is keeping the level of Lake Manitoba steady. Lake St. Martin is sitting at 801.60 feet, down slightly from last week.

Lake Winnipegosis is sitting at 833.81 feet, which is a half foot above the record level for this time of year. That does not bode well for next spring, as it will keep Waterhen flows very high. In preparing for next spring, the province is lowering the level of the Shellmouth Reservoir and it is falling rapidly. The level has declined a foot over the last week and is now sitting at 1402.1 feet.

Flow on the Assiniboine is currently reading 5,401 cfs at Holland and 4,236 cfs at Headingly. I am suspicious about these numbers, as the flows have been erratic this week.

River update
Time: 8:00 AM December 18, 2016
Portage Diversion: closed
Assiniboine at Holland: 5,401 cfs
Assiniboine at Headingly: 4,236 cfs
Waterhen: ice affected
Whitemud: 346 cfs
Fairford: 7,201 cfs
 
Lake update
Time: 8:00 AM December 18, 2016
Steep Rock: 812.39 ft
Westbourne: 812.56 ft
Mean level: 812.47 ft
Lake St. Martin: 801.60 ft
Lake Winnipegosis: 833.81 ft

Lake Manitoba update: Dec. 11, 2016

Ice is affecting the gauges this week, leaving all of the river flows suspect. The Waterhen and Fairford gauges are clearly ice-affected this morning.

The level of Lake Manitoba, 812.46 feet, is little changed from last week. Lake St. Martin is sitting at 801.64 feet, down from last week. Flow on the Assiniboine is falling as the ice is forming, being 2,224 cfs at Holland and 2,436 cfs at Headingly.

River update
Time: 9:00 AM December 11, 2016
Portage Diversion: closed
Assiniboine at Holland: 2,224 cfs
Assiniboine at Headingly: 2,436 cfs
Waterhen: ice affeced
Whitemud: 282 cfs
Fairford: ice affected
 
Lake update
Time: 9:00 AM December 11, 2016
Steep Rock: 812.16 ft
Westbourne: 812.76 ft
Mean level: 812.46 ft
Lake St. Martin: 801.64 ft
Lake Winnipegosis: 833.79 ft

Alert: High Winds on Lake Manitoba

PROVINCE ISSUES HIGH WIND ALERTS FOR LAKE MANITOBA and Lake Winnipeg

Manitoba reports that forecast high winds for tomorrow have resulted in a high wind effect warning for the south basin of Lake Manitoba. North winds are forecast to increase throughout this evening, increasing up to 60 km/h tomorrow.

Wind speed and direction could raise levels by as much as three to five feet along the south shore of Lake Manitoba.  In addition, these winds could result in significant wave action on shorelines.

Lake Manitoba is currently at 812.45 feet above sea level (FASL), resulting is possible Lake height of between 815.45 feet and 817.45 feet.

Property owners are advised to take precautions.

Lake Manitoba update: Dec. 4, 2016

Ice is forming on the lakes and rivers and this is starting to affect the gauges. It looks like this is happening on the Waterhen gauge that has been fluctuating wildly over the last few days. With the potential for ice effects the gauge readings should be regarded as provisional.

The level of Lake Manitoba is now 812.44 feet. Outflow at Fairford is 8,296 cfs. Flow on the Whitemud rose modestly this week to 254 cfs. Lake St. Martin continues to inch upward, and has reached 801.89 feet. Flow on the Assiniboine is up slightly from last week, being 4,338 cfs at Holland and 4,518 cfs at Headingly.

River update
Time: 4:00 PM December 4, 2016
Portage Diversion: closed
Assiniboine at Holland: 4,554 cfs
Assiniboine at Headingly: 4,518 cfs
Waterhen: no reading
Whitemud: 254 cfs
Fairford: 8,296 cfs
 
Lake update
Time: 4:00 PM December 4, 2016
Steep Rock: 812.47 ft
Westbourne: 812.42 ft
Mean level: 812.44 ft
Lake St. Martin: 801.89 ft
Lake Winnipegosis: 833.73 ft