Friday, April 29, 2022, 11:45 a.m. – Rain warnings are in effect for a storm this weekend that will rain more in parts of the waterlogged countryside.
Rain warnings are in effect in parts of southern Manitoba ahead of another low in Colorado, which could lead to the threat of further flooding in areas already heavily affected by recent storms. The rain will start to fall on Friday night and will last until Sunday morning. More about what you need to know about the approaching storm and preparations in progress, below.
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This is the third low level of the Colorado Prairies in three weeks. Each subsequent storm is slightly warmer than the previous one. Our first storm earlier this month brought a huge blizzard to the region. Last week’s storm brought a mixture of rain and snow. The low-pressure system this weekend will lead to milder conditions and mostly rain in southern Saskatchewan and Manitoba.
Our storm over the weekend is in its infancy in the southern Rockies. The system will cross the American plains on Friday and its moisture will begin to spill across the border at night.
Constant rain will cover South Saskatchewan and Manitoba for most of Saturday. We could see widespread sums of 20+ mm in these areas, with 30-50 mm possible in the most affected areas.
The extra rainfall is bad news for areas struggling with floods from a combination of excess rainfall in recent weeks and an outflow of continued thawing in the region. Upcoming rainfall could lead to unnecessary stress on waterways, rivers and streams.
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Canada Environment and Climate Change (ECCC) has already issued a rainfall warning for southeastern Manitoba ahead of the system this weekend.
“Soil that is already close to saturation has little ability to absorb additional rainfall,” the ECCC warning said. “Localized floods are possible in low-lying areas.”
Most of the rainfall is likely to fall in the form of rain, although there may be some snow over the higher terrain of southwestern Manitoba at the back of the low on Sunday. Areas near the international border are likely to receive more rainfall.
Authorities continue to warn residents to stay out of local waterways, as the risk of high flows, debris and low temperatures poses a significant safety risk.
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