Lake Manitoba update: April 21, 2019

The spring freshet has come and gone on the Assiniboine: flows are declining rapidly and the Portage Diversion has been closed. We benefited from cooperative weather that resulted in a slow snow melt.

The level of Lake Manitoba is up slightly from last week, to 811.61 feet this morning. The level of Lake St. Martin is fell further to 799.16 feet. The level of Lake Winnipegosis is currently wind affected and reading 831.82 feet this morning. Flow on the Fairford River is up slightly to 3,196 cfs. Flow on the Waterhen River has risen to 5,933 cfs while flow on the Whitemud is down to 466 cfs. The gauge on the Dauphin River is showing a sharply increased flow of 4,485 cfs (which seems too high and may be a gauge error). Flow on the Assiniboine is falling and is now 3,214 cfs at Holland and 3,567 cfs at Headingly. The Shellmouth Reservoir is being filled and has reached to 1397.31 ft this morning.

River update
Time: 9:30 AM April 21, 2019
Portage Diversion: closed
Assiniboine at Holland: 3,214 cfs
Assiniboine at Headingly: 3,567 cfs
Waterhen: 5,933 cfs
Whitemud: 466 cfs
Fairford: 3,196 cfs
Dauphin: 4,485 cfs
 
Lake update
Time: 9:30 AM April 21, 2019
Steep Rock: 811.58 ft
Westbourne: 811.63 ft
Mean level Lake Manitoba: 811.61 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 799.16 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 831.82 ft
Shellmouth Reservoir: 1397.31 ft

Extracted from the Environment and Climate Change Canada Real-time Hydrometric Data web site (https://wateroffice.ec.gc.ca/mainmenu/real_time_data_index_e.html) on April 21, 2019