Wx Centre

Fog is a common weather feature in many parts of Canada, but not all fog forms in the same way. Fog is classified based on the processes that cause air near the surface to become saturated. Understanding those differences can help explain why some areas experience dense fog while nearby locations remain clear. Radiation fog develops when the ground cools rapidly, usually overnight under clear and calm conditions. The air near the surface cools to its dew point, allowing fog t

Not long after Hurricane Lala lashed Hawaii, Tropical Storm Moke os expected to pass south of the state today through Tuesday. Heavy rain and strong winds began overnight on the Big Island. The centre of the storm is expected to pass south of the Big Island of Hawaii on Sunday, then well south of the smaller main Hawaiian Islands early next week. The storm has winds of 85 km/h with higher gusts. Moke is expected to produce rainfall totals of 5 to 10 inches with maximum amount

A developing low currently off the coast of Massachusetts will bring flooding rain to most of the Maritimes beginning on Sunday. Most of mainland Nova Scotia can expect to see 30 to 60 mm of rain. Central and northern Nova Scotia will receive 50 to 75 mm. Prince Edward Island could potentially see 30 to 40 mm of rain, while southern New Brunswick will pick up 30 to 50 mm. Thundershowers may also develop on Sunday and will result in locally higher rainfall amounts. The rain wi

An area of low pressure will move over parts of northeastern and far northeastern Ontario on Saturday and linger into Sunday. Rainfall amounts of 30 to 50 mm are expected on Saturday, and on Sunday, parts of central and southwestern Ontario could also see 30 to 50 mm of rain. Rain will also advance southward into portions of southern and southwestern Ontario. This heavy rain has the potential to cause flash flooding and water pooling on roads. Flooding may occur in low-lying

Much of the southern United States remains gripped by a prolonged stretch of extreme heat, with record-high temperatures and unusually warm overnight lows expected across parts of the region. The Southeast is at the centre of the heat through today, with temperatures expected to remain well above seasonal averages. Overnight lows could remain in the low 80s in some areas, providing little relief from the daytime heat when combined with oppressive humidity. Record-breaking tem

Canada’s largest and most powerful icebreaker reached the North Pole on Sunday as part of its 2026 Arctic deployment. The Canadian Coast Guard Ship (CCGS) Louis S. St-Laurent reached the North Pole on Aug. 16 while carrying out scientific and mapping work in the Arctic. The voyage is supporting Canada’s efforts to define the country’s continental shelf and map its outer limits under the United Nations Convention on the Law of the Sea. As part of ongoing missions running from