The umbrella is in the spotlight. Up to 50 mm of rain could fall in many regions of Quebec, including the metropolis, from Saturday afternoon to Monday morning. This precipitation occurs at a time when many bodies of water are still under surveillance or subject to flooding in Quebec.
Environment Canada has issued a rain warning alert for the region of Montreal, Laval, as well as part of Montérégie, Lanaudière and the Laurentians. A special weather report is also in effect for the entire western and southern part of the province, along the St. Lawrence River.
In the mainland, “sometimes heavy” rain is expected. It should start in the afternoon on Saturday and continue until Monday, with a lull in the day on Sunday. In total, 30 to 50 mm of rain are expected.
A first period of rain is expected Saturday evening and overnight: 10 to 15 mm should fall in Montreal, details Gerardo Velonza, meteorologist for Environment Canada. Intermittent rain, around 5 mm in total, is expected on Sunday.
“Thereafter, we will have a second wave of rain a little more intense in the night from Sunday to Monday, he adds. We would be talking about 15 to 25 for Montreal and the South Shore, and 20 to 30 for the North Shore. »
Forecasts are similar in the west and south of the province. In the northern Laurentians, Outaouais and Abitibi-Témiscamingue, 20 to 40 mm of rain are expected.
Along the St. Lawrence River, in the regions of Mauricie, Centre-du-Québec, Capitale-Nationale and Chaudière-Appalaches, 30 to 50 mm of rain are forecast.
Flood risks
This episode of rain occurs at a time when many waterways are still under surveillance or are already experiencing light flooding in Quebec.
In Sainte-Anne-de-Bellevue, west of Montreal, Lac des Deux Montagnes is already experiencing light flooding, while Lac Saint-Louis is under surveillance, according to the ministry’s flood monitoring map. of Public Security.
“At the present time, the Civil Security Organization of the agglomeration of Montreal is still in intervention mode for its special spring flooding intervention plan, indicated to The Press Camille Bégin, Public Relations Officer for the City of Montreal. This mode means the opening of the emergency measures coordination center and increased mobilization of City units in order to optimize the emergency response. »
“Given the precipitation expected over the next few hours, we continue to monitor the situation closely, in real time, on the ground,” she adds. So far, the situation is under control. »
In Laval, minor flooding has been reported in the Rivière des Prairies, and sections of the Rivière des Mille Îles are under surveillance.
In the Laurentians, the Lièvre River is under surveillance. To the west, minor flooding was noted in the Ottawa River and the Petite Nation River.
In Lanaudière, flooding affects Lake Maskinongé, and the Noire, Matawin and Ouareau rivers are under surveillance.
On the river side, Lake Saint-Pierre has slightly overflowed and the St. Lawrence is under surveillance at Port-Saint-François. The authorities are also monitoring the Maskinongé River.
A gray week
The rain could continue during the week. “After the second episode of rain from Sunday to Monday, we will always be under the low pressure center of the system that affects us,” said Mr. Velonza.
Tuesday and Wednesday, new showers could bring an additional 10 to 20 mm of rain.
The sun should rise again on Thursday, although residual showers could still persist. The good weather will return for the end of the week.