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Flood Report - April 24, 2019

Posted: April 24, 2019

 

Flood Report for Manitoba
April 24, 2019

  


Flood Warning*:                - Red River, from Emerson to the Red River Floodway Channel Inlet

Summary
  • Water levels on the Red River in Manitoba upstream of Winnipeg continue to rise. The river is near crest at Emerson and is expected to stay near crest for a few days.
  • Partial ring dike closures are currently in place at Emerson and at St. Jean Baptiste. Both communities will remain accessible by road. With the revised forecasted peak water levels, partial closures are no longer anticipated at Letellier and St. Adolphe.
  • PTH 75 North at Morris is expected to remain open. Staff are closely watching water levels and forecasts. If water levels reach the upper end of the forecast, staff will begin undertaking 24-hour monitoring and an earthen ramp and additional traffic control measures may be implemented between April 26 and April 28.
Weather
  • There has been no significant precipitation in southern Manitoba or upstream jurisdictions and none is forecasted for the next few days.
  • Cooler conditions are expected to begin over the weekend, with daytime highs and overnight lows slightly below seasonal. Some precipitation is forecasted over the weekend; however, the amounts and location of the precipitation may change in the coming days.
Red River Basin
  • Water levels on the Red River in Manitoba upstream of Winnipeg continue to rise. The river is near crest at Pembina, North Dakota and Emerson and is expected to stay near crest for a few days. The recorded water level rise in the last 24 hours was 0.3 feet at Emerson, 0.5 feet at Morris, and 0.4 feet at Ste. Agathe.
  • The river is above banks at many locations, including Emerson, Letellier, St. Jean Baptiste, Morris, and St. Adolphe. Natural Resources Canada produces up-to-date flood extent maps, which are available online at https://www.nrcan.gc.ca/hazards/floods. The satellite imagery used to produce these maps is captured on a three-day cycle. The next imagery will be captured on April 26 and will be available online on April 27.
Forecasted peak water levels on the Red River were updated this morning;;. The latest forecast information and water level data is summarized below.

Today’s level (ft) Forecasted peak
Level (Ft) Date
Emerson 787.6 787.7 - 788.0 Apr 25-26
Letellier 782.6 782.9 - 783.3 Apr 25-27
St. Jean 776.6 777.4 - 778.2 Apr 26-28
Morris (@ PTH 23) 772.1 773.4 - 774.6 Apr 27-29
Ste. Agathe 763.4 764.7 - 766.1 Apr 28-30
St. Adolphe 759.2 760.5 - 761.2 Apr 28-30
Above floodway inlet 755.9 757.5 - 757.9 Apr 29-30
James Avenue 17.3 18.1 - 18.3 Apr 29-30

Note: water levels at Emerson and Ste Agathe will differ from those posted on the Water Survey of Canada website because different vertical datums are in use. For conversion information please see the most recent flood sheet.
  • Partial ring dike closures are currently in place at Emerson (a local road at the north side of the West Lynne Dike, CN rail line at the border, and at Noyes), and at St. Jean Baptiste (on PR 246 at the east end of the community). Both communities will remain accessible by road.
  • With the revised forecasted peak water levels, partial closures are no longer anticipated at Letellier and St. Adolphe. PTH 75 North at Morris is expected to remain open. Staff are closely watching water levels and forecasts. If water levels reach the upper end of the forecast, staff will begin undertaking 24-hour monitoring and an earthen ramp and additional traffic control measures may be implemented between April 26 and April 28.
  • Crews are also running pumping operations to facilitate internal drainage inside ring dike communities. Pumping operations are underway at Emerson, Letellier, Dominion City, St. Jean Baptiste, Morris, St. Adolphe, and Rosenort. As the water rises pumping operations are expected to be required at Riverside. Depending on water levels, pumping operations may be required at Brunkild and Aubigny. Pumping is not expected at Ste. Agathe, but if required, it will be undertaken by the RM of Ritchot.
  • The Red River Floodway is operating under Rule 1 to lower water levels in Winnipeg while keeping water levels at or slightly below natural upstream of the inlet control structure. Flow in the Floodway channel was 11,390 cfs (322 cms) this morning. Flows upstream of the Floodway Inlet this morning are approximately 55,900 cfs (1,585 cms).
  • Sections of PR 320 remain closed or limited to local traffic because of high water levels, debris on road, and soft and muddy conditions. East of St. Jean Baptiste, a portion of PR 217, from PR 246 to PR 200, is closed due to flooding and water on the road. For updated detours and road closures please call 511 or visit www.manitoba511.ca.
Manitoba Lakes
  • Ice coverage on Manitoba’s major lakes remains largely unchanged, with 85% or higher on many lakes according to the most recent satellite imagery. Observations from the field indicate a continued deterioration of ice strength on the lakes. Winds are generally moderate from the west or northwest for the next 24 hours, up to 30 km/hr, and the risk of ice pile-up is low.
Notes
  • All flow and water level information is based on data available at 7:00 am. Morning Conditions reports, with current water level data, are available on the department’s website this morning and flood sheets with updated forecast information will be posted later today at https://gov.mb.ca/mit/floodinfo/#forecasts_reports.
  • Any questions or concerns about flood mitigation should be directed first to the municipal authority (call the Municipal Office at 204-338-0306 or email info@weststpaul.com). Questions about forecasts, water levels, provincial waterways, or provincial water control infrastructure can be directed to 204-945-1165 or by email to floodinfo@gov.mb.ca.
  • For detours and road closures please call 511 or visit www.manitoba511.ca.
*Definitions
Flood Warning: A flood warning is issued when river or lake levels are exceeding or are expected to be
exceeding flood stage within the next 24 hours.

Flood Watch: A flood watch is issued when river or lake levels are approaching and likely to reach flood stage, but likely not within the next 24 hours.

High Water Advisory: A high water advisory is issued when a heavy storm or high flows are expected and may cause water levels to rise, but not necessarily reach flood stage. A high water advisory can be an early indicator for conditions that may develop into a flood watch or flood warning.

Hydrologic Forecasting & Water Management
Water Management & Structures Division
Manitoba Infrastructure