Thunderstorms, heavy rain bring special weather statement to south, central Manitoba

Showers or thunderstorms are expected to roll through southern and central Manitoba on Thursday, bringing an estimated 20 to 40 millimetres of rain, Environment Canada says.

Environment Canada issues warning as 20 to 40 millimetres of rain expected

Environment Canada warns a low pressure system coming up from the United States will roll through late Thursday and could result in more than 50 millimetres of rain in some communities. (Ben Nelms/CBC)

A special weather statement is in effect for Winnipeg and all of south and central Manitoba amid heavy rains forecast on Thursday.

The storms are expected to dump an estimated 20 to 40 millimetres of rain across Winnipeg and numerous flood-affected communities from the Canada-U.S. border north into the Interlake, Environment Canada says.

A low pressure system is forecast to push north from the U.S. and combine with moist air from the Gulf of Mexico to produce heavy showers and thunderstorms.

That system should move into the Red River Valley and southeast of the province late Thursday and into the evening.

Though the shower and storms are expected to pass through quickly, they could produce "torrential downpours" and some areas could get more than 50 mm by Friday morning, according to Environment Canada.

The latest forecast comes on the heels three significant spring storm systems that have caused flooding, and 20 to 40 mm of rain earlier in the week.

More than two dozen municipalities are already under local states of emergency, hundreds have been moved from their flood-threatened homes, and numerous provincial parks have had to close due to rising water levels and road washouts.

Ahead of the Thursday storm, flood warnings have been issued for portions of southwest and southeast Manitoba, the provincial hydrological forecast centre said in a statement Wednesday night.

Overland flood watches issued earlier this week remain in effect for southern and central Manitoba, and a flood warning has been issued for Dauphin Lake.

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