Environment Canada is calling for a special weather statement with a “significant widespread rainfall event” expected beginning overnight or early Tuesday morning and ending Tuesday evening.
Rainfall amounts will range from 25 to 40 mm in most places. There may be appreciably higher amounts exceeding 60 mm in some locales and the precipitationn statement is in effect for: Niagara Falls – Welland – Southern Niagara Region St. Catharines – Grimsby – Northern Niagara Region
The system responsible for this rainfall is a slow-moving low pressure system from Texas. It will bring tropical moisture from the Gulf of Mexico to Southern Ontario.
Rainfall warnings may be issued if a more significant event of widespread 50 mm or more appears more certain.
Now here is a look at the more detailed forecast…today, a mix of sun and cloud. Fog patches dissipating this morning. High 27. Humidex 35. UV index 8 or very high.
Tonight
Mainly cloudy. 60 percent chance of rain before morning. Low 21.
Tue
Rain with risk of a thunderstorm. Amount 15 to 25 mm. Wind southeast 20 km/h becoming southwest 20 in the afternoon. High 26. Humidex 35.
Night
Cloudy periods with 40 percent chance of showers. Windy. Low 19.
Wed
A mix of sun and cloud. High 28.
Night
Cloudy periods. Low 20.
Thu
Sunny. High 29.
Night
Clear. Low 19.
Fri
Sunny. High 28.
Night
Cloudy periods. Low 20.
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