Flash flooding in Detroit - rain on the way for Montreal

Above and below photos show major flash flooding in metro Detroit on Interstates 75 and 94 during last evenings commute. Nearly 5 inches of rain fell in a few hours. (WXYZ News Detroit)

 A very slow moving weather system is moving across Lake Huron this morning with a wide area of rain, some of it very heavy and thunderstorms. Yesterday major flooding occurred throughout metro Detroit and neighboring Windsor after 50-125mm (2-5 inches) of rain fell is as little as two hours late in the afternoon and evening. The rain turned the entire metro Detroit freeway system into a series of canals funneling the flood water throughout the city. Flash flooding inundated homes, business and made most highways impassable trapping motorists during the evening commute. It was the same in Windsor and Essex County, Ontario where 40-70mm (2-3 inches) of rain fell between 6 and 8pm. The water washed out streets and flooded basements.

In Montreal we managed 30C (86F) on Monday at Trudeau Airport, I had 32C (90F) at my home on L'Ile Perrot under bright sunshine. The weather will now change dramatically with the arrival of clouds and eventually rain and thunderstorms by evening from the aforementioned storm. The rain is spreading across central Ontario this morning and should arrive in Ottawa by midday and Montreal by evening. A special weather statement is now posted for all of southern and eastern Ontario for between 25-75mm (1-3 inches) of rain in the next 24 hours. The heaviest rain may move just north of Montreal and Environment Canada has posted warnings for the Ottawa Valley and the Laurentians for up to 70mm. Montreal can expect about 25mm of rain at this time, most of that late tonight and Wednesday. Temperatures will be slightly cooler today at 27C (81F) and much cooler for the balance of the week, either side of 20C (68F) for highs.