April showers bring May flowers...and spring flooding

Rainfall over the last 72 hours has dropped 30 to 35mm across southern Quebec. The rain along with melting snow and ice has resulted in sharp rises in area rivers. Several are approaching minor flood stage. Vigilance is important over the next few weeks, especially if you live along or near  flood prone areas of southern Quebec. More rain is forecast over the next three days in Montreal.

It is that time of the year again where we hold our breath as rapid snowmelt and spring rain swell our rivers. During the past two weeks across our region, most of the ice has melted away from both the Ottawa and Saint Lawrence Rivers as well as the tributaries in and around southern Quebec. This combined with rainfall this April has resulted in sharp rises in the rivers that surround our island as well as Laval.

Since April 1st, 72.4mm of rain has fallen at Trudeau Airport. Rain has fallen on 12 of the 14 days this month, with more forecast over the next 72 hours. Sécurité Publique Québec has been monitoring the gauges around southern Quebec and reports one in medium flood stage, 7 at minor stage and 18 under surveillance.

Parts of the Mille Îles River are reporting minor flooding, while the gauge in Lake of Two Mountains at Sainte-Anne-de-Bellevue is reading 23.28 metres, just below minor flood stage. Most rivers are slowly rising, with the next 72 hours being critical as to where we go from here. North of Montreal, the Ouareau River near Rawdon is in moderate flood stage.

A wavy stationary front stretching from Iowa to Maine, has been the focus of rain and strong thunderstorms at times. The front lies southwest of Montreal, keeping very warm and humid air just to our south. Most of the storms have been firing up along and south of the front in southwestern Ontario and New England. The front is separating summer from spring, with Windsor, Ontario reaching 27C (81F) on Tuesday afternoon, while Montreal struggled to reach 9C (49F). As I write this blog, Montreal is siting at 7C (45F), while New York City is currently 28C (83F).

Several areas of low pressure will ride along the front producing more showers and thunderstorms through Sunday, with another 15-25mm of rain possible. A cold front will sweep across the region late Sunday, ushering in unseasonably cold air for a day or two. There may even be some flurries around.

Residents across the metro Montreal region who live in flood prone areas adjacent to our rivers, should continue to monitor water levels and listen to information supplied by your burrough or municipality.