Top Crop Manager

Irrigation
Manitoba issues heavy rainfall advisory

July 27, 2015 - Manitoba Infrastructure and Transportation's Hydrologic Forecast Centre advises that significant rainfall is forecast for parts of southwestern Manitoba and Saskatchewan in the next three to four days. As much as 100 millimetres of rain could fall, starting later today.

Various weather forecasts indicate variable amounts and different areas where the precipitation will fall. If the maximum forecasted rainfall amount occurs, it could generate potential overland flooding and raise river levels across much of southwestern Manitoba.

The Shellmouth Dam is currently at the summer target level and the Qu'Appelle River has a slightly higher than normal flow for this time of the year. However, soils are generally much drier than 2014 when a similar heavy rain event led to issues with flooding, so it is anticipated the effects will not be as serious.

Flash or overland flooding could happen in areas hit by heavier rainstorms. Communities in southwestern Manitoba are advised to take necessary precautions. Detailed impacts on tributaries and main stem rivers will be evaluated as a clearer picture of this active weather emerges.

Rainfall amounts will be variable depending on stronger thunderstorms which will be embedded in the larger area of rain. Current indications are for the heaviest band of rain to extend through the southern and southeastern Saskatchewan area with local amounts of 100 mm or more.

Flooding can affect road conditions quickly. Before travelling, check road conditions by calling 511. Listen to radio or TV weather and flood updates. Do not walk through moving water, even as little as six inches (15 cm).

Do not drive into flooded areas. If floodwaters rise around your car, abandon the car and move to higher ground if you can do so safely. Do not touch electrical equipment if you are wet or standing in water.