Manitoba Water Stewardship

Rainfall from the storm of the past few days was significant but lighter than expected in most regions. Some areas of eastern Manitoba such as Sprague and Flanders Lake in southern Nopiming Par k received up to 60 mm of rain. However the rain was fairly gentle as thunderstorms did not develop.

Environment Canada is predicting little or no precipitation for the next 5 days.

THE HIGH STREAMFLOW ADVISORY FOR SMALL STREAMS IN SOUTHEASTERN MANITOBA IS ENDED.

THE FLOOD WATCH FOR NOPIMING PROVINCIAL PARK HAS BEEN REDUCED TO A HIGH WATER LEVEL ADVISORY.

A HIGH WATER LEVEL ADVISORY IS ALSO IN EFFECT FOR THE WHITESHELL EXCEPT ON THE WINNIPEG RIVER.

A HIGH WATER LEVEL ADVISORY IS IN EFFECT FOR THE RED RIVER FOR THE NEXT FEW WEEKS.

THE FLOOD WARNING FOR THE ASSINIBOINE RIVER FROM SHELLMOUTH TO MILLWOOD HAS BEEN REDUCE TO A HIGH WATER LEVEL ADVISORY.

Southeastern Manitoba:

While rainfall has been significant for the past few days, it was relatively gentle without thunderstorms. As a result, runoff has been less than what could have occurred and there will be only minor rises in most rivers and no overland flooding.

The flood watch for Nopiming Park has been reduced to a high water level advisory. Recent rains may cause only minor additional rises in rivers and lakes in the area. Recent rain is also causing lakes and streams in the Whiteshell to rise above desirable levels. Dams have been operated to reduce lake levels as best possible. Residents in flood prone areas are advised to take appropriate precautions. The high water advisory does not apply to the Winnipeg River where lakes will remain at or below normal levels.

Red River Watershed:

The Red River has begun to rise at Emerson due to recent heavy rainfall in the United States portion of the watershed. A crest is expected at Emerson June 13-14 and in the Winnipeg area June 16-17. Predicted crests have been reduced somewhat. Total expected rises now range from 10 feet at Emerson to 5-6 feet from Morris to the Floodway Inlet. This forecast is based largely on crests predicted by the U.S. National Weather Service for the U.S. portion. The crest in downtown Winnipeg should be near 12 feet above datum based on normal weather conditions from now on. The level in downtown Winnipeg was 8.3 feet this morning, down from a crest of 10.1 feet last weekend. The normal summer level in Winnipeg is 6.3 feet.

Assiniboine River:

The Shellmouth Reservoir water level declined 0.05 feet to 1410.70 feet in the 24 hour period ending this morning. The decrease was due to a decline in winds. There has been no flow through the conduit since 10 a.m. yesterday. The spillway flow this morning was 2070 cfs. Little change in reservoir water levels and outflows is expected for the next 3-4 days after which they should begin a steady decline based on favourable weather.

The reservoir inflow continues to decline slowly and was below 2300 cfs this morning.

The level of the Assiniboine River at Shellmouth bridge downstream of the Dam declined 0.4 feet during the past 24 hours due to the decrease in reservoir outflows. Flooding of low areas downstream of Shellmouth Dam is expected to gradually subside. The flood warning has been reduced to a high water level advisory sine further rises are not anticipated.

A flood sheet for the Assiniboine River is attached.