|
|
|
||
|
|
|
|
|
|
||||
        |
 |
|
| Surface Water Information Flood Forecasting Reports |
High Water Report for Manitoba
July 5th, 2007
Scattered thundershowers occurred yesterday afternoon in a band along the Manitoba escarpment from eastern Riding Mountain to the Morden area. Some areas received heavy downpours with brief overland flooding.
Little or no precipitation is expected from today through Monday.
Highlights:
THE HIGH WATER LEVEL ADVISORY FOR THE RED RIVER IS NOW ENDED.
A HIGH WATER ADVISORY CONTINUES FOR THE WHITESHELL AND NOPIMING PROVINCIAL PARKS.
Eastern Manitoba:
A high water advisory remains in effect for Whiteshell Provincial Park and southern Nopiming Park where lakes remain at unusually high levels, creating serious problems for docks, boathouses and some low-lying cottages. Some campgrounds are partially flooded and there is water over some roads in the area. Most lakes are now declining slowly but levels will remain above the desirable range until mid July even with favourable weather from now on.
Logs have been removed from dams controlling levels in the Whiteshell in order to lower lake levels. Parks staff will attempt to remove additional logs from White Lake and Jessica Lake today.
Lakes along the Winnipeg River have risen to somewhat above average levels during the past week but remain within the desirable range. Lake Of The Woods is slowly recovering from the unusually low levels of last year.
Red River Watershed:
The high water level advisory for the Red River has been ended. Levels are declining rapidly and flooding has ended in the area from Letellier to St. Jean. There is no flooding elsewhere along the Red River. The high flows on the Red River will continue to have an impact on recreation in the Winnipeg area and will affect navigation at St. Andrews Dam for another 10 days or so.
The Red River declined 1.9 feet at Emerson and 0.6 feet at Winnipeg during the 24 hour period ending this morning. The level in downtown Winnipeg was at 14.0 feet this morning. The normal summer level is in Winnipeg is 6.4 feet. With normal July weather, the level in Winnipeg is expected to decline to the Forks walkway level of 8.5 feet by July 15.
A flood sheet for the Red River is attached.
Assiniboine River:
Flows in the Portage Diversion flows will be reduced gradually for the next 7 days in order to increase flows down the river at Portage la Prairie by 500 cubic feet per second (cfs) per day. Levels of the Assiniboine River from Portage la Prairie to west Winnipeg will rise 3.0 to 3.5 feet during this period. Levels of the Assiniboine River downstream of Route 90 in Winnipeg will continue to decline despite the increase in Assiniboine River flows.
The Shellmouth Reservoir water level this morning was 1410.20 feet with a spillway flow of 1350 cfs. The reservoir inflow this morning is estimated at 1230 cfs. The reservoir level, inflow and outflow will continue to subside this week based on little precipitation.
The conduit at Shellmouth Dam was further opened to 250 cfs near noon today. Conduit flows will be adjusted as required to maintain a total outflow of 1550 to 1650 cfs, which is below the bankfull capacity of the River downstream of the dam. This should enable the reservoir water level to decline steadily. It is estimated that spillway flows will end in 2-3 weeks based on relatively dry weather.
A flood sheet for the Assiniboine River is attached.
Northwest:
Lake Winnipegosis is presently at its highest level since the mid 1950’s. No further rise is expected based on normal weather conditions. Shoreline flooding could occur in low areas if strong winds develop during the next six weeks.
Water levels remain very high in the Saskeram area west-northwest of The Pas. While no homes are flooded, there are continued difficulties with cattle due to flooded pastures.
| HomeContact UsAbout Manitoba |