Winter Storm Brings Severe Conditions to US and Canada
A powerful winter storm is currently sweeping across north-eastern United States and south-eastern Canada, delivering heavy snowfall, freezing rain, and strong winds. This weather event, which intensified rapidly after developing in the north-western US late last week, is causing significant disruptions and hazardous conditions in affected areas.
Storm Development and Impacts
The storm system formed by combining dry, cold air from northern regions with warm, humid air from the tropics. On Sunday, it generated extensive snowfall across northern US states, while a narrow band of heavy rain and thunderstorms developed along a strong cold front stretching from the northern US to the Gulf of Mexico. Strong, gusty winds associated with this front fanned a large wildfire in Nebraska, burning over 550 square miles.
The National Weather Service issued an outlook warning of potential tornadoes along the front, with a 15% risk assigned to an area home to more than 11 million people across three states for Monday.
Forecast for the Coming Days
As the new week begins, the storm centre is expected to continue pushing north-east into south-eastern Canada. This will bring heavy snowfall, freezing rain, and strong winds to north-eastern US, Ontario, Quebec, and Newfoundland through Monday and Tuesday. Impacts are likely to be most severe around the Great Lakes, where snowfall accumulations of up to 60-80cm are anticipated, followed by winds of 60-70mph, producing blizzard conditions and significant drifting.
Meanwhile, the cold front farther south will sweep through the US east coast on Monday, ushering in a polar air mass that will drive temperatures 10-25C below the seasonal average across the eastern two-thirds of North America. Sub-zero temperatures may reach as far south as Alabama and Georgia. The coldest conditions in the US are expected in North Dakota and Minnesota, where temperatures could dip into the −20sC (−4F). In Canada’s Manitoba and Ontario provinces, temperatures may fall close to −40C.
Contrasting Weather Patterns
In contrast to the severe cold in the east, the western third of the continent is likely to experience temperatures 10-15C above the seasonal average. This sharp contrast is not unusual across the US in late winter and early spring, highlighting the dynamic nature of North American weather systems.
Global Weather Context
Elsewhere, Australia has experienced very high rainfall in recent weeks. In parts of Queensland last week, a year’s worth of rain fell within 72 hours. Further rainfall is expected as a low-pressure system slides south-eastwards across central Australia early this week before stalling over the border region of New South Wales, Queensland, and South Australia. Up to 150mm of rain is forecast in a 48-hour window, with flood warnings remaining in place across much of the Australian interior.
This winter storm underscores the ongoing challenges posed by extreme weather events in North America, with authorities urging residents to take precautions and stay informed about local conditions.
