Holiday Monday rain will turn heavy this evening, warns Environment Canada

Rainfall amounts of 30 to 50 mm are expected Monday, but rainfall rates could be 25 mm within a hour Monday evening.

Published Aug 07, 2023 • Last updated 3 hours ago • 1 minute read

OTTAWA – July 13, 2023 – Walking through a rain storm in Ottawa. Photo by Tony Caldwell /Postmedia

It’s raining, but it will be pouring Monday evening, Environment Canada says in a special weather statement.

Rainfall amounts of 30 to 50 mm are expected Monday, but rainfall rates could be 25 mm within an hour Monday evening.

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“Scattered showers will become heavy at times this morning,” said Environment Canada.

“Showers are expected to diminish through this afternoon before another round of heavy rain, likely with thunderstorms, arrives this evening.”

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Moderate showers are then expected to ease Tuesday morning or afternoon. Total rainfall amounts of 30 to 50 mm are expected, but higher amounts can not be ruled out.

Environment Canada said it will issue rainfall warnings if higher totals are anticipated.

“Heavy downpours can cause flash floods and water pooling on roads,” warned Environment Canada.

“Heavy rainfall in combination with other weather factors, such as hail, wind and lightning will make outdoor activities unsafe.”

Residents who live in flood-prone areas are advised to consult their location conservation authorities. However, as of Monday morning, both the Rideau Valley Conservation Authority and the Mississippi Valley Conservation Authority had listed the flood status as “normal.”