Ottawa could see 30 to 50 mm of rain over the next two days. Here's when the heavy rain will begin
Environment Canada's forecast calls for 10 to 20 mm of rain today and 15 to 25 mm of rain tonight, with another 5 to 10 mm of rain on Wednesday.
According to the forecast, the rain will start at 2 p.m.
The record for greatest rainfall at the Ottawa International Airport on May 6 is 19.6 mm, set back in 1952. Another weather station in Ottawa recorded 22.6 mm of rain on May 6, 1989.
It will be mainly cloudy with a 30 per cent chance of showers this morning and early this afternoon. Showers will begin this afternoon with the risk of a thunderstorm. High 23 C, with the humidex making it feel like 26.
Showers tonight. Environment Canada says there will be a risk of a thunderstorm this evening. Low 12 C.
Wednesday will see more rain. High 14 C.
The outlook for Thursday calls for a mix of sun and cloud with a 30 per cent chance of showers. High 13 C.
Friday will be cloudy with a high of 14 C.
The normal temperatures for this time of year are a high of 18 C and a low of 7 C.
Flood warning
A flood warning remains in effect for the Lower Ottawa River, between Arnprior and Hawkesbury.
'Water levels and flows have been steadily rising along the Ottawa River due to seasonal rainfall combined with ongoing snowmelt in the northern basin,' conservation authorities said in a statement Monday evening. 'Flows and water levels are expected to stabilize over the coming days.'
Minor flood levels have been exceeded along the Ottawa River from Pembroke to Britannia, while minor flood thresholds are expected to be exceeded this week from Gatineau to Hawkesbury.
The statement says water levels may decrease later this week in the Constance Bay, Britannia and Cumberland Village areas.
'Current forecasts suggest that water levels on the main Ottawa River will remain 80 - 150 cm below the 2019 historic flood levels, and below 2023 peak levels,' officials say.
The flood warning was issued by the Mississippi Valley Conservation Authority, the Rideau Valley Conservation Authority and the South Nation Conservation.
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